BARON ASSET FUND
485BPOS, 1999-02-10
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                     UNITED STATES                            OMB APPROVAL
            SECURITIES AND EXCHANGE COMMISSION        OMB Number:      3235-0307
                  Washington, D.C. 20549              Expires:      May 31, 2000
                                                      Estimated average burden
                                                      hours per response..212.95

                      FORM  N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                     [ ]
Pre-Effective Amendment No. ___                                             [ ]
Post-Effective Amendment No.  15                                            [X]

                        and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940             [ ]
     Amendment No.  16                                                      [X]

                        (Check appropriate box or boxes)

                                BARON ASSET FUND
- --------------------------------------------------------------------------------
               (Exact Name of Registrant as Specified in Charter)

   767 Fifth Avenue, New York, New York                            10153
- --------------------------------------------------------    --------------------
 (Address of Principal Executive Offices)                        (Zip Code)

Registrant's Telephone Number, including Area Code   212-583-2000
                                                   -----------------------------

Linda S. Martinson, c/o Baron Asset Fund, 767 Fifth Avenue, NY, NY 10153
- --------------------------------------------------------------------------------
       (Name and Address of Agent for Service)

Approximate Date of Proposed Public Offering    immediately                  
                                            ------------------------------------

It is proposed that this filing will become effective (check appropriate box)
     [X] immediately upon filing pursuant to paragraph (b)
     [ ] on (date) pursuant to paragraph (b)
     [ ] 60 days after filing pursuant to paragraph (a)(1)
     [ ] on (date) pursuant to paragraph (a)(1)
     [ ] 75 days after filing pursuant to paragraph (a)(2)
     [ ] on (date) pursuant to paragraph (a)(2) of rule 485.
If appropriate, check the following box:
     [ ] this post-effective amendment designates a new effective date for a
         previously filed post-effective amendment.

     Omit from the facing sheet  reference to the other Act if the  Registration
Statement  or  amendment  is filed  under  only  one of the  Acts.  Include  the
"Approximate  Date of Proposed Public  Offering" and "Title of Securities  Being
Registered"  only where securities are being registered under the Securities Act
of 1933.

     Form N-1A is to be used by open-end management investment companies, except
insurance  company  separate  accounts and small business  investment  companies
licensed  under the United  States Small  Business  Administration,  to register
under the  Investment  Company Act of 1940 and to offer their  shares  under the
Securities  Act of 1933.  The  Commission  has  designed  Form  N-1A to  provide
investors  with  information  that will assist  them in making a decision  about
investing in an investment company eligible to use the Form. The Commission also
may use the  information  provided on Form N-1A in its  regulatory ,  disclosure
review, inspection, and policy making roles.

     A  Registrant  is required to disclose  the  information  specified by Form
N-1A, and the Commission will make this information  public. A Registrant is not
required to respond to the  collection  of  information  contained  in Form N-1A
unless the Form  displays a  currently  valid  Office of  Management  and Budget
("OMB")  control number.  Please direct comments  concerning the accuracy of the
information  collection  burden estimate and suggestions for reducing the burden
to  Secretary,  Securities  and  Exchange  Commission,  450  5th  Street,  N.W.,
Washington, D.C. 20549-6009. The OMB has reviewed this collection of information
under the clearance requirements of 44 U.S.C. Sec. 3507.

          POTENTIAL  PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION
          CONTAINED  IN THIS FORM ARE NOT  REQUIRED  TO RESPOND  UNLESS THE FORM
          DISPLAYS A CURRENTLY VALID OMB CONTROL NUMBER.

SEC 2052 (5-98)
                                        I-3

<PAGE>

P  R  O  S  P  E  C  T  U  S


                               BARON FUNDS


                                              J A N U A R Y  1 9 9 9

                                              BARON ASSET FUND

                                              BARON GROWTH
                                              & INCOME FUND

                                              BARON SMALL CAP FUND



                     [REGISTERED CASTLE LOGO]
<PAGE>
<PAGE>
WELCOME TO
BARON FUNDS:

BARON:  A CULTURE FOCUSED ON GROWTH...BIG             [PHOTO]
IDEAS, GREAT PEOPLE, SMALL AND MID-SIZED
BUSINESSES.

When I founded  Baron Capital in May 1982, a little more than sixteen years ago,
I had no grand  plan for  Baron  Capital  to  become  what it has.  I had been a
securities  analyst since 1970, and a portfolio  manager/analyst  since 1975. My
initial  investment  successes  in  the  early  1970's  were  the  result  of my
recognizing a few simple,  obvious and potentially large ideas.  McDonald's...we
ate their  $.18  hamburgers  and $.15  fries and drank  their $.10 Cokes in high
school and I felt demand for their food would be  substantial;  their  corporate
growth  was  at an  early  stage;  and,  they  just  had  to be  able  to  raise
prices...Disney...I  was bullish on the prospects  for the new themed  amusement
park they were  building  in  Orlando  and,  for the  100,000  acres  they owned
surrounding that  park...Federal  Express...I  thought the idea of overnight and
reliable  mail  service  for  businesses   sounded  like  a  great   idea...and,
Mattel...the  prospects  for Barbie  seemed to me a lot  bigger  than most other
analysts expected.

My investment  education  advanced  greatly in the mid  1970's...and,  I finally
began to accumulate  capital...when  I met several  hardworking,  brilliant,  no
nonsense, live by your word, die by your word entrepreneurs with big ideas...Jay
Pritzker,  Hyatt  Hotels...Phil  Berman,  Leader Healthcare and Hess' Department
Stores...David Murdoch,  Flexivan and IBP...and Steve Wynn, Golden Nugget...and,
invested in their  businesses.  In addition to a big, long lasting idea,  people
became the next element of our investment equation.

Our formula  continued to evolve.  I determined to invest in small and mid-sized
businesses rather than larger ones. I felt, intuitively, that smaller businesses
had greater potential for growth. Smaller businesses were also less likely to be
priced  efficiently  since few Wall Street analysts cared enough to follow their
progress.  I believed  investment  information  gathered  through my independent
research efforts,  as a result,  would often not yet be reflected in a business'
stock market valuation.  This offered significant  investment advantage,  I felt
then and continue to believe. I invested in a relatively concentrated fashion to
best take advantage of the opportunities my independent  investment research had
unearthed.  I had inadvertently  begun to follow the investment  precept to "put
all your eggs in one basket and don't take your eyes off the basket."

Finally,  following a strictly  common  sense  approach,  I was only  willing to
invest in a business that could be purchased at an attractive  price. I invested
in  businesses  that

                                                     NOT PART OF THE PROSPECTUS
<PAGE>

could be expected to double in size every three to five years.  I determined  to
purchase  shares in these  businesses only if we could buy shares at prices that
offered my clients the same opportunity.

BARON: A LONG TERM INVESTOR...OWNS MAJOR STAKES IN         [PHOTO]
SEVERAL BUSINESSES. LONG TERM INVESTMENTS CONTINUE
TO OFFER PROMISE; RECENT INVESTMENTS PROVIDE
SIGNIFICANT EMBEDDED OPPORTUNITY.

Baron Capital's investment philosophy...and performance...have been built upon a
relatively  simple,  and  straightforward,  idea. We are long term  investors in
businesses.  We do not trade  stocks.  We think of  ourselves  as part owners of
publicly held businesses...very profitable businesses with important barriers to
prevent others from usurping our corporate opportunities. Businesses in which we
invest are run by terrific executives, entrepreneurial executives we like, trust
and admire...and who are also focused on growth.

Our oldest and largest mutual fund,  Baron Asset Fund, was founded in June 1987.
Baron Asset annual portfolio  turnover averaged just 18.7% during the past three
years. This means that we hold an average  investment more than five years! Most
mutual funds that invest in small and mid-sized businesses have annual portfolio
turnover of more than 100%...those funds hold their investments less than twelve
months.1  Investors  in other  funds can  rarely  know  what  their  funds  own.
Investors in Baron Funds know what they own. And, even more  importantly,  Baron
Capital's  analysts,  over  the  years,  have the  opportunity  to  become  more
knowledgeable  about these  businesses than most other  investors,  an important
advantage  for our  shareholders.  Baron Asset has out  performed the S & P 500,
Russell 2000 and, all but a few other funds since its inception.

Baron Funds owns major interests in several publicly traded       [PHOTO]
businesses...  Vail Resorts,  Sotheby's,  Manor Care, 
Charles Schwab,  American Tower,  Robert Half,
Heftel, Saga Communications,  Sun International
Hotels,  Choice Hotels,  DeVry, Mirage Resorts,
NTL and Polo Ralph Lauren. We are likely to remain investors in
these  businesses,  and  several  others,  as  well,  for  years.  Many  of  our
investments   have   increased   in  value   several   fold  since  our  initial
purchases...Schwab has appreciated more than twenty five times since 1992, Manor
Care seven  times  since 1989,  DeVry  fifteen  times since 1990 and Robert Half
International  more than 44 times since our initial purchases in 1991. All still
offer the  potential to double in price during the next five

NOT PART OF THE PROSPECTUS
<PAGE>

years.  Many of our newer  investments  offer our funds'         [PHOTO]
shareholders even more significant appreciation potential,
we believe...although  probably not 44 times
in seven years. Of course, we cannot predict future results.

BARON: A GROWTH  BUSINESS...OUR  INVESTMENT  PERFORMANCE HAS BEEN VERY GOOD, OUR
MEDIA COVERAGE GREAT, OUR DISTRIBUTION EXTRAORDINARY!
 
At its founding in 1982, Baron Capital had less than $10 million customer assets
under management.  Our firm was dependent for revenue upon brokerage commissions
paid by its  institutional  customers for our investment  research.  We made the
decision to stop selling our research to others seven years ago. About six years
ago our firm's assets under management  began to grow very rapidly.  Since 1992,
Baron Capital has been one of the fastest  growing  domestic equity mutual funds
in the United States.2 The firm's customer assets under management have grown to
$7.7 billion as of December 31,1998,  the date of this letter. Each year for the
past six years,  Baron  Funds has  garnered  an  increasing  share of the assets
invested in domestic,  equity  mutual  funds.  During the past two years,  Baron
Funds has received more than 1% of net new assets  invested in domestic,  equity
mutual funds. 3

Our firm's rapid customer asset growth has been achieved  importantly because we
recognized in 1992 that Charles Schwab's Mutual Fund Marketplace and later, that
Schwab's Mutual Fund OneSource,  would  revolutionize  mutual fund distribution.
Baron Funds has benefited  greatly not just from its  participation  in Schwab's
OneSource,  but also as a member  in  Fidelity's  FundsNetwork  and  other  fund
"supermarket"  distribution  systems. The strong performance of Baron Asset Fund
since 1987,  and of our managed  accounts for the  seventeen  years  prior,  had
already  attracted  the  attention of the  financial  press.  The new  financial
supermarkets permitted independent,  fee based financial planners, for the first
time, to easily invest for their clients in our by then already well known,  but
still small mutual fund.  The very  favorable  publicity we have received in the
financial  press  since has helped us add retail  investors,  also  through  the
convenience of the financial supermarkets.

Baron Asset Fund has increasingly  been chosen as one of several mutual funds to
be  offered as a  possible  401(k)  investment  option  for  employees  of large
corporations.  Our strategic  alliances with other large mutual fund  management
companies  and  brokerage  firms  have also  helped us begin to grow our  401(k)
investors.  We believe 401 (k) plan  investors  will continue to increase  their
percentage ownership of our mutual funds. This is of benefit to our funds' other
shareholders  since these assets have  greater  persistency,  namely,  they last
longer, and, accordingly,  allow us to continue to make longer term, potentially
very profitable investments in businesses.

BARON HAS TERRIFIC EMPLOYEES...TALENTED, ETHICAL, HARD WORKING, LOYAL.

                                                     NOT PART OF THE PROSPECTUS
<PAGE>

Baron Capital has  attracted...trained...and  retained...        [PHOTO]
exceptionally  talented and dedicated employees. As a
result, our firm's financial expertise,  knowledge
base and reputation have continued to grow. Baron Capital has become a preferred
place of employment for talented  investment  professionals.  Employee  turnover
during the past five years has been virtually nil.

I am grateful to my fellow employees for the contributions they have made to our
firm's  success.  I am certain that the coming years offer even greater  promise
and potential than the recent past.

THANK YOU FOR INVESTING IN BARON FUNDS

We  recognize  it  cannot be an easy  decision  for most  individuals  and their
families  when choosing  mutual funds in which to invest.  It must be especially
difficult  when you must consider how to invest your hard earned savings to fund
your retirement, your children's education or a new home. We understand the task
must be even more daunting  since there are now more mutual funds than there are
stocks.  We hope our  shareholder  letters,  interviews  in the press and annual
investment  conferences  have made it easier for you to determine if Baron Funds
represents an appropriate investment for you and your family.

I want to thank  you for  choosing  to join us as fellow  shareholders  at Baron
Funds.  I also want to thank our fellow  employees for the  confidence  you have
shown in me and in our  business.  We will continue to work hard to justify this
confidence. We are looking forward to a successful 1999.

Sincerely, 

/s/Ronald Baron

Ronald Baron
Chairman of the Board and
Chief Executive Officer



1    According  to  Morningstar,  a reported  1232 out of 1643 small and mid cap
     mutual  funds have an average  turnover  rate of 98%.  
2    Data provided by Investment  Company  Institute and Baron  Capital,  Inc. 
3    Data provided by Investment Company Institute and Baron Capital, Inc.



NOT PART OF THE PROSPECTUS

<PAGE>

BARON FUNDS OFFERS THEIR DIFFERENT MUTUAL FUNDS TO HELP INVESTORS WITH DIFFERING
INVESTMENT NEEDS ACHIEVE THEIR LONG TERM FINANCIAL GOALS.

BARON ASSET FUND, A NO-LOAD, SMALL CAP FUND
Baron  Asset  Fund,  founded  June 12,  1987,  invests  primarily  in small  and
mid-sized  companies.  We believe  the market is least  efficient  when  valuing
assets and growth prospects of these  companies.  This is because most investors
and securities analysts are most interested in larger companies.  They also seem
to be most  interested in current  events and company  earnings  results for the
next three months,  information  they believe will influence stock prices in the
near term.  This provides our Fund with investment  opportunity  since we focus,
instead, on the prospects for businesses over the long term, e.g. at least three
to five years.  Baron Asset Fund is suitable  for  investors  seeking  long term
capital appreciation.

BARON GROWTH & INCOME FUND, A NO-LOAD, GROWTH AND INCOME FUND
Baron Growth & Income Fund,  founded January 3, 1995, also invests  primarily in
common stocks of well managed, fast growing,  small and mid-sized companies.  In
addition,  it  currently  invests  25-30%  of its  assets  in  convertible  debt
securities and dividend paying common stocks which offer both attractive  yields
and growth. A large portion of these income  producing  securities are currently
real estate investment  trusts.  Baron Growth & Income Fund could achieve higher
returns than most growth and income funds due to its investments in fast growing
smaller  companies;  it should be less volatile than most small cap growth funds
due to its significant investments in income producing securities.  This Fund is
suitable for investors  seeking  capital  appreciation  but who desire less risk
than is usually associated with investing in small cap funds.

BARON SMALL CAP FUND, A NO-LOAD, SMALL CAP FUND
Baron  Small Cap Fund,  founded  October 1,  1997,  invests  primarily  in small
companies.  The Fund's investments fall into three categories:  small cap stocks
that have  significant  long-term  growth  prospects  that can be  purchased  at
attractive  prices  because their  prospects  have not yet been  appreciated  by
investors;  smaller  companies  that have strong  long-term  franchises but have
disappointed investors with short-term results and can be currently purchased at
value prices; and special situations, including spin-offs and recapitalizations,
where  significant  shareholder  displacement  and a lack of investor  awareness
create  opportunities  to purchase great  businesses at discount  prices.  Baron
Small Cap Fund is suitable for investors seeking long term capital  appreciation
who understand the risks associated with investing in smaller companies.

                                                      NOT PART OF THE PROSPECTUS
<PAGE>























NOT PART OF THE PROSPECTUS
<PAGE>

BARON ASSET FUND
BARON GROWTH & INCOME FUND
BARON SMALL CAP FUND
767 Fifth Avenue,
New York, New York 10153
1-800-99-BARON
212-583-2100




















This prospectus  contains  essential  information for anyone  investing in these
funds. Please read it carefully and keep it for reference.


As with all mutual  funds,  the fact that these shares are  registered  with the
Securities  and  Exchange  Commission  does not mean  that  the  Commission  has
approved or disapproved  them or determined  whether this prospectus is accurate
or complete. Anyone who tells you otherwise is committing a crime.




January 20, 1999

                                                               PROSPECTUS 1





<PAGE>

TABLE OF CONTENTS

- --------------------------------------------------------------------------------
INFORMATION ABOUT       Investment Goals and Strategies......................3

THE FUNDS               Principal Risks......................................4

                        Past Performance.....................................6

                        Fund Expenses........................................7

                        Financial Highlights.................................8

                        Other Investment Strategies.........................10

                        Management..........................................12

- --------------------------------------------------------------------------------

INFORMATION             How Your Shares are Priced..........................14
ABOUT YOUR 
INVESTMENT              How to Purchase Shares..............................14

                        How to Redeem Shares................................16

                        Distributions and Taxes.............................18

                        General Information.................................18

- --------------------------------------------------------------------------------

MORE INFORMATION        Back Cover








2 PROSPECTUS

<PAGE>

INFORMATION ABOUT THE FUNDS


INVESTMENT GOALS AND STRATEGIES
The investment goals of the Funds are:

BARON ASSET FUND      capital appreciation through investments in securities of
                      small and medium sized companies with undervalued assets
                      or favorable growth prospects

BARON GROWTH          capital appreciation with income as a secondary objective
& INCOME FUND

BARON SMALL CAP FUND  capital appreciation through investments primarily in
                      securities of small companies

Investment decisions are made by the Funds' investment adviser, BAMCO, Inc. (the
"Adviser").

BARON ASSET FUND and BARON GROWTH & INCOME FUND invest  primarily in small sized
companies  with market  capitalizations  of  approximately  $100 million to $1.5
billion and medium  sized  companies  with market  values of $1.5  billion to $5
billion. BARON GROWTH & INCOME FUND also invests in debt securities. BARON SMALL
CAP FUND  invests at least 65% of its total  assets,  measured  at cost,  in the
securities of smaller  companies with market values of up to $1.5 billion and it
can invest up to 35% in the securities of larger sized companies.

Although Baron Funds invest primarily in small and medium sized  companies,  the
Funds will not sell positions  just because their market values have  increased.
The  Funds  will add to its  positions  in a  company  even  though  its  market
capitalization has increased through  appreciation beyond the limits stated, if,
in the Adviser's judgment,  the company is still an attractive  investment.  The
Funds may invest in larger  companies  if the Adviser  perceives  an  attractive
opportunity in a larger company.

WHAT DOES THE ADVISER LOOK FOR?
In making  investment  decisions for the Funds the Adviser seeks securities that
the Adviser believes have:
o    favorable price to value  characteristics based on the Adviser's assessment
     of their prospects for future growth and profitability.
o    the potential to increase in value at least 50% over two subsequent years.

                                                            PROSPECTUS 3

<PAGE>

The Adviser  thoroughly  researches  the  companies  in which the Funds  invest.
Included in the research  process are visits and  interviews by the Adviser with
company  managements and their major competitors.  The Adviser looks for special
business niches, unusually favorable business opportunities,  the opportunity to
benefit from long lasting economic trends,  barriers to entry, strong management
capabilities,  and strong balance sheets.  The Funds may take large positions in
the companies in which the Adviser has the greatest conviction. The Funds have a
long term outlook;  they are not short-term  traders of securities.  There is no
assurance that the Funds will meet their investment goals.

WHAT KINDS OF SECURITIES DO THE FUNDS BUY?
BARON ASSET FUND and BARON SMALL CAP FUND invest  primarily in common stocks but
may also invest in other  equity-type  securities such as convertible  bonds and
debentures,   preferred  stocks,  warrants  and  convertible  preferred  stocks.
Securities are selected for their capital appreciation potential, and investment
income is not a consideration.

BARON  GROWTH & INCOME FUND invests in equity and debt  securities;  how much of
each  depends  entirely  on  the  Adviser's  view  of  then-existing  investment
opportunities  and  economic  conditions.  The Fund will usually be more heavily
invested in equity securities than debt securities.

The equity security portion of the portfolios consist primarily of common stocks
and  may  include  convertible   securities,   preferred  stocks,  warrants  and
convertible  preferred  stocks.  The debt security  portion of the portfolio may
include notes, bonds,  debentures and money market instruments.  Debt securities
represent an obligation of the issuer to repay a loan of money to it, often with
interest.  The debt  securities in which the Funds may invest  include rated and
unrated securities and convertible  instruments.  There is no minimum rating for
the debt securities that may be purchased for those Funds. The Funds rely on the
Adviser's  assessment  of the  issuer's  securities  and do not use  independent
ratings organizations.

WHAT ARE THE PRINCIPAL RISKS OF INVESTING IN THE FUNDS?
General Stock Market Risk The Funds'  principal  risks are those of investing in
the stock  market.  The value of your  investment in a Fund will increase as the
stock  market  prices  of the  securities  owned by the Fund  increase  and will
decrease as the Fund's investments  decrease in market value.  Equity securities
fluctuate in value, often based on factors unrelated to the value of the issuer,
such as  political,  economic or general  market  conditions.  Because the stock
values  fluctuate,  when you sell your  investment  you may receive more or less
money than you originally invested.

4 PROSPECTUS

<PAGE>

SMALL AND MEDIUM SIZED  COMPANIES The Adviser  believes  there is more potential
for capital  appreciation in smaller  companies and in establishing  significant
positions in companies  in which the Adviser has the  greatest  conviction,  but
there also may be more risk.  Securities  of smaller  companies  may not be well
known to most investors and the  securities may be thinly traded.  There is more
reliance on the skills of a compa ny's management and on their continued tenure.
Investments may be attractively priced relative to the Adviser's assessment of a
company's growth prospects,  management expertise,  and business niche, yet have
modest or no current cash flows or earnings.  Although the Adviser  concentrates
on a company's growth  prospects,  it also focuses on cash flow, asset value and
reported earnings. This investment approach requires a long-term outlook and may
require  shareholders  to  assume  more  risk  and to have  more  patience  than
investing in the securities of larger, more established companies.

DEBT SECURITIES Lower rated securities may have a higher yield and the potential
for a greater  return than  investment  grade  securities but may also have more
risk. Lower rated  securities are generally meant for longer-term  investing and
may be subject to certain risks with respect to the issuing entity and to market
fluctuations.  See the SAI for more information.  The Adviser will also evaluate
the  securities  and the ability of the issuers to pay interest  and  principal.
With lower rated debt  securities,  a Fund's  ability to achieve its  investment
objective may be more dependent on the Adviser's  credit  analysis than might be
the case with higher rated securities. The market price and yield of lower rated
securities  are generally  more volatile than those of higher rated  securities.
Factors adversely  affecting the market price and yield of these securities will
adversely  affect the  Fund's  net asset  value.  The  trading  market for these
securities  may be less liquid than that of higher rated  securities.  Companies
that issue lower rated  securities may be highly  leveraged or may have unstable
earnings,  and consequently the risk of the investment in the securities of such
issuers may be greater than with higher rated securities.

The interest bearing features of debt securities carry a promise of income flow,
but the price of the  securities  are inversely  affected by changes in interest
rates and are therefore  subject to the risk of market price  fluctuations.  The
market values of debt  securities  may also be affected by changes in the credit
ratings or financial condition of the issuers.

CONVERTIBLE  SECURITIES  Since  convertible  securities  combine the  investment
characteristics  of  both  bonds  and  common  stocks,  the  Funds'  convertible
securities  investments  absorb the market  risks of both stocks and bonds.  The
combination does,  however,  make the investment less sensitive to interest rate
changes than straight bonds of comparable  maturity and quality and usually less
volatile than common stocks.  Because of these factors,  convertible  securities
are likely to perform  differently than broadly-based  measures of the stock and
bond markets.

                                                                PROSPECTUS 5

<PAGE>

PAST PERFORMANCE

The two  tables  below  show the  Funds'  annual  returns  and  their  long term
performance. The information provides some indications of the risks of investing
in the Funds.  The first table shows you how the  performance  for each Fund has
varied from year to year. The second compares the Funds'  performance  over time
to that of the  Russell  2000,  a  widely  recognized  unmanaged  index of small
companies.  How the  Funds  have  performed  in the past is not  necessarily  an
indication of how they will perform in the future.  The annual  report  contains
additional  performance  information  which is available  upon  request  without
charge by writing or calling the Funds at the address and  telephone  number set
forth on the back of this Prospectus.

[BAR CHART]
<TABLE>
<CAPTION>
YEAR BY YEAR TOTAL RETURN as of 12/31 of each year (%)
<S>                        <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
<C>
Baron Asset Fund           25.0    -18.5   34.0    13.9    23.5    7.4     35.3    22.0    33.9    4.3

Baron Growth & Income Fund                                                 52.5    27.7    31.1    0.1

Baron Small Cap Fund                                                                               2.2

                           1989    1990    1991    1992    1993    1994    1995    1996    1997    1998
</TABLE>


<TABLE>
<CAPTION>
                        BARON ASSET            BARON GROWTH &         BARON SMALL
                           FUND                 INCOME FUND             CAP FUND
<S>                     <C>                    <C>                    <C>
BEST QUARTER:              +26.6%                 +22.6%                 +22.4%
                         12/31/98                 12/31/98               12/31/98
- ----------------------------------------------------------------------------------

WORST QUARTER:             -24.0%                 -22.1%                 -28.1%
                         09/30/90                 09/30/98               09/30/98
</TABLE>



6 PROSPECTUS

<PAGE>

<TABLE>
<CAPTION>
AVERAGE ANNUAL TOTAL RETURN as of 12/31/98

                                                                                   Date of
                       1 Year      5 Years      10 Years      Since Inception      Inception
- --------------------------------------------------------------------------------------------
<S>                    <C>         <C>          <C>           <C>                  <C>
Baron Asset
Fund                   +4.3%       +19.9%       +16.9%        +17.7%               06/12/87
- --------------------------------------------------------------------------------------------
Baron Growth &
Income Fund            +0.1%                                  +26.4%               01/03/95
- --------------------------------------------------------------------------------------------
Baron Small
Cap Fund               +2.2%                                  + 4.3%               10/01/97
- --------------------------------------------------------------------------------------------
Russell 2000           -2.6%       +11.9%       +12.9%        +10.4%*
- -------------------------------------------------------------------------------------------
</TABLE>
* Since inception of Baron Asset Fund

FUND EXPENSES

The table below  describes  the fees and expenses  that you would pay if you buy
and hold shares of the Funds.

<TABLE>
<CAPTION>
ANNUAL FUND OPERATING EXPENSES 
(Expenses that are deducted from a Fund's assets)

                       Management      Distribution      Other            Total Annual Fund
                          Fees         (12b-1) Fee       Expenses         Operating Expenses    
- --------------------------------------------------------------------------------------------
<S>                    <C>             <C>               <C>              <C>
Baron Asset Fund       1.0%            0.25%             0.07%            1.32%
- --------------------------------------------------------------------------------------------
Baron Growth &
Income Fund            1.0%            0.25%             0.18%            1.43%*
- --------------------------------------------------------------------------------------------
Baron Small Cap Fund   1.0%            0.25%             0.14%            1.39%
- --------------------------------------------------------------------------------------------
</TABLE>

*    The expense  ratio for Baron  Growth & Income Fund net of interest  expense
     would be 1.37% for the fiscal year ended 9/30/98.

EXAMPLE
This  example is intended to help you compare the cost of investing in the Funds
with the cost of investing in other mutual funds.  The example  assumes that you
invest $10,000 in the Fund for the time periods indicated and then redeem all of
your shares at the end of those  periods.  The example  also  assumes  that your
investment  has a 5% return  each year and that the  Funds'  operating  expenses
remain the same.  Although  your actual  costs may be higher or lower,  based on
these assumptions your costs would be:

<TABLE>
<CAPTION>
YEAR                     1             3             5             10
- -------------------------------------------------------------------------------
<S>                      <C>           <C>           <C>           <C>
BARON ASSET FUND         $134          $418          $723          $1590
- -------------------------------------------------------------------------------
BARON GROWTH &
INCOME FUND              $146          $452          $782          $1713
- -------------------------------------------------------------------------------
BARON SMALL CAP FUND     $142          $440          $761          $1669
- -------------------------------------------------------------------------------
</TABLE>
                                                               PROSPECTUS 7
<PAGE>

There are additional charges if you have retirement accounts and wire transfers.
You also may purchase and redeem your shares  through  broker-dealers  or others
who may charge a commission or other  transaction fee for their  services.  (See
"How to Purchase Shares" and "How to Redeem Shares")

The 12b-1 fee is paid to Baron Capital,  Inc. for shareholder  and  distribution
services.  Because the fee is paid out of the Funds' assets on an ongoing basis,
over time it will  increase  the cost of your  investment  and may cost you more
than paying other types of sales charges.

FINANCIAL HIGHLIGHTS

The financial  highlights  table is intended to help you  understand  the Funds'
financial  performance  for the  fiscal  years  indicated.  Certain  information
reflects financial results for a single fund share. The "total return" shows how
much your investment in the Fund would have increased (or decreased) during each
period,  assuming you had  reinvested  all  dividends and  distributions.  These
financial  highlights  have been  audited by  PricewaterhouseCoopers,  LLP,  the
Funds' independent  accountants,  whose report,  along with the Funds' financial
statements, is included in the annual report.

<TABLE>
<CAPTION>
BARON ASSET FUND
Year Ended September 30
                                       1998       1997       1996       1995       1994
<S>                                    <C>        <C>        <C>        <C>        <C>
Net Asset Value Beginning of Year      $47.43     $35.50     $29.30     $22.82     $21.91
- -------------------------------------------------------------------------------------------
INCOME FROM INVESTMENT OPERATIONS
Net Investment Income (Loss)             0.05      (0.14)     (0.06)     (0.09)     (0.14)
Net Realized and Unrealized Gains
 (Losses) on Investments               (7.52)     12.11       6.29       7.23       1.82 
- -------------------------------------------------------------------------------------------
Total from Investment Operations.       (7.47)     11.97       6.23       7.14       1.68
- -------------------------------------------------------------------------------------------
LESS DISTRIBUTIONS
Dividends from Net Investment Income     0.00       0.00       0.00       0.00       0.00
Distributions from Net Realized Gains    0.00      (0.04)     (0.03)     (0.66)     (0.77)
- -------------------------------------------------------------------------------------------
Total Distributions                      0.00      (0.04)     (0.03)     (0.66)     (0.77)
- -------------------------------------------------------------------------------------------
Net Asset Value, End of Year           $39.96     $47.43     $35.50     $29.30     $22.82
===========================================================================================
TOTAL RETURN                           (15.7%)     33.8%      21.3%      32.3%       8.0%
- -------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA
Net Assets (in millions) End of Year   $4,410.5   $3,224.5   $1,166.1   $290.0     $80.3
Ratio of Expenses to Average Net
 Assets                                   1.32%      1.35%      1.40%     1.44%      1.59%
Ratio of Net Investment Income  
 (Loss) to Average Net Assets             0.11%     (0.52%)    (0.29%)   (0.55%)    (0.71%)
- -------------------------------------------------------------------------------------------
Portfolio Turnover Rate                 23.43%     13.23%     19.34%    35.15%     55.87%
</TABLE>

8 PROSPECTUS  

<PAGE>

<TABLE>
<CAPTION>
BARON GROWTH & INCOME FUND
Year Ended September 30
                                       1998       1997       1996       1995*
<S>                                    <C>        <C>        <C>        <C>
Net Asset Value Beginning of Year      $24.89     $18.40     $14.77     $10.00
- ------------------------------------------------------------------------------------------
INCOME FROM INVESTMENT OPERATIONS
Net Investment Income (Loss)             0.06       0.06       0.11       0.04
Net Realized and Unrealized Gains
 (Losses) on Investments                (4.56)      6.68       3.66       4.73
- ------------------------------------------------------------------------------------------
Total from Investment Operations        (4.50)      6.74       3.77       4.77
- ------------------------------------------------------------------------------------------
LESS DISTRIBUTIONS
Dividends from Net Investment Income    (0.02)     (0.09)     (0.04)      0.00
Distributions from Net Realized Gains   (0.05)     (0.16)     (0.10)      0.00
- ------------------------------------------------------------------------------------------
Total Distributions                     (0.07)     (0.25)     (0.14)      0.00
- ------------------------------------------------------------------------------------------
Net Asset Value, End of Year           $20.32     $24.89     $18.40     $14.77
==========================================================================================
TOTAL RETURN                           (18.1%)     37.1%      25.8%      47.7%

RATIOS/SUPPLEMENTAL DATA
Net Assets (in millions), End of Year  $315.6     $390.8     $207.2     $28.6
Ratio of Total Expenses to Average Net
 Assets                                 1.43%      1.40%      1.54%      1.99%**
Less: Ratio of Interest Expenses to
 Average Net Assets                    (0.06%)
- ------------------------------------------------------------------------------------------
Ratio of expenses to Average Net
 Assets Exclusive of Interest Expense   1.37%      1.40%      1.54%      1.99%**  
- ------------------------------------------------------------------------------------------
Ratio of Net Investment Income to
 (Loss) to Average Net Assets           0.20%      0.37%      1.20%      1.13%**
Portfolio Turnover Rate.............   40.39%     25.17%     40.27%     40.56%

</TABLE>
*    For the period  January 3, 1995  (commencement  of operations) to September
     30, 1995.
**   Annualized.

The Fund's custodian offset custody fees of $5,252(less than $0.01 per share) in
1996 and $12,003(less  than $0.01 per share) in 1995. The expense ratio is gross
of the custodian offset.



                                                               PROSPECTUS 9

<PAGE>

<TABLE>
<CAPTION>
BARON SMALL CAP FUND
Year Ended September 30

                                                 1998*
<S>                                              <C>
Net Asset Value Beginning of Year                $10.00
- ----------------------------------------------------------
INCOME FROM INVESTMENT OPERATIONS
Net Investment Income (Loss)                      (0.02)
Net Realized and Unrealized Gains
 (Losses) on Investments                          (1.37)
- ----------------------------------------------------------
Total from Investment Operations                  (1.39)
- ----------------------------------------------------------
LESS DISTRIBUTIONS
Dividends from Net Investment Income               0.00
Distributions from Net Realized Gains              0.00
- ----------------------------------------------------------
Total Distributions                                0.00
- ----------------------------------------------------------
Net Asset Value, End of Year                     $ 8.61  
==========================================================
TOTAL RETURN                                     (13.9%) 
- ----------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA 
Net Assets(in millions), End of Year             $403.7
Ratio of Expenses to Average Net Assets           1.39%
Ratio of Net Investment Income to
 (Loss) to Average Net Assets                   (0.20%)
Portfolio Turnover Rate                          59.68%
</TABLE>

*    For the period  October 1, 1997  (commencement  of operations) to September
     30, 1998.

OTHER INVESTMENT STRATEGIES

WHAT ARE SOME OF THE OTHER INVESTMENTS THE FUNDS MAKE? 

TEMPORARY  INVESTMENTS  When  the  Adviser  determines  that  opportunities  for
profitable  investments are limited or that adverse market  conditions exist and
believes that investing for temporary defensive purposes is appropriate,  all or
a portion of the Funds'  assets may be  invested  in money  market  instruments,
which include U.S.  Government  securities,  certificates  of deposit,  bankers'
acceptances,  short-term  investment  grade corporate bonds and other short-term
debt  instruments,  and  repurchase  agreements.  If the  Funds  take  temporary
defensive positions their investment objectives may not be achieved. BARON ASSET
FUND may  borrow  up to 5% of its net  assets  for  extraordinary  or  emergency
temporary  investment  purposes  or to  meet  redemption  requests  which  might
otherwise  require an untimely  sale of  portfolio  securities.  BARON  GROWTH &
INCOME  FUND and BARON

10 PROSPECTUS

<PAGE>

SMALL  CAP FUND may  borrow  up to 30% of the  value of their  respective  total
assets,  including the amount borrowed, as of the time the borrowing is made for
temporary, emergency or other purposes.

ILLIQUID  SECURITIES  BARON ASSET FUND may invest up to 10%,  and BARON GROWTH &
INCOME FUND and BARON  SMALL CAP FUND may invest up to 15%, of their  respective
net assets in  securities  that are illiquid.  An illiquid  security is one that
cannot be disposed of in the ordinary course of business within seven days.

SPECIAL  SITUATIONS  The Funds may  invest in  "special  situations."  A special
situation  arises  when,  in the opinion of the  Adviser,  the  securities  of a
company will be recognized and appreciate in value due to a specific anticipated
development at that company.  Such developments  might include a new product,  a
management change, an acquisition or a technological advancement.

OPTIONS AND  DERIVATIVES  BARON ASSET FUND may write (sell) covered call options
or purchase put options on equity and/or debt securities.  BARON GROWTH & INCOME
FUND and BARON SMALL CAP FUND may write  (sell) put  options  and  covered  call
options and purchase put and call options on equity  and/or debt  securities.  A
call  option  gives the  purchaser  of the  options  the right to buy,  and when
exercised  obligates the writer to sell, the underlying security at the exercise
price.  A put option gives the  purchaser  of the option the right to sell,  and
when  exercised  obligates  the writer to buy,  the  underlying  security at the
exercise  price.  The options may be listed or  over-the-counter.  The Funds may
also enter into equity swap agreements with approved parties.

REITs The Funds may invest in the equity  securities  of real estate  investment
trusts ("REITs"). A REIT is a corporation or business trust that invests in real
estate and derives its income from rents from real property or interest on loans
secured by mortgages on real property.

OTHER   STRATEGIES  The  Funds  have   additional   investment   strategies  and
restrictions that govern their activities.  For a list of these restrictions and
more  information  about  the  investment  strategies,  please  see the  section
"Investment  Goals,  Strategies  and  Risks"  in  the  Statement  of  Additional
Information.  Those that are identified as "fundamental"may only be changed with
shareholder approval, while the others may be changed by the Board of Trustees.

WHAT ARE SOME ADDITIONAL RISK FACTORS?

OPTIONS AND  DERIVATIVES  Options may fail as hedging  techniques in cases where
the price  movements of the securities  underlying the options do not follow the
price  movements  of the  portfolio  securities  subject to the hedge.  Gains on
investments  in  options  and  derivatives  depend on the  Adviser's  ability to
anticipate  correctly the direction of stock prices,  interest rates,  and other
economic factors. The dealer who

                                                            PROSPECTUS 11
<PAGE>

takes the other side of a  derivative  transaction  could  fail.  Where a liquid
secondary  market  does not exist,  the Fund  would  likely be unable to control
losses by closing its position.

BORROWINGS  To the extent a Fund  borrows,  it must  maintain  continuous  asset
coverage of 300% of the amount  borrowed.  Such borrowing has special risks. Any
amount borrowed will be subject to interest costs that may or may not exceed the
appreciation of the securities purchased.

ILLIQUID  SECURITIES  The absence of a trading market could make it difficult to
ascertain a market value for illiquid positions.  A Fund's net asset value could
be adversely affected if there were no ready buyer at an acceptable price at the
time the Fund decided to sell.  Time-consuming  negotiations  and expenses could
occur in disposing of the shares.

REAL  ESTATE  INVESTMENT  TRUSTS The market  value of REITs may be  affected  by
changes  in the tax laws or by  their  inability  to  qualify  for the  tax-free
pass-through  of their  income.  The REIT portion of the  portfolio  may also be
affected  by general  fluctuations  in real  estate  values and by  defaults  by
borrowers or tenants.

SPECIAL  SITUATIONS  Investments  in special  situations  have the risk that the
anticipated  development  does  not  occur  or does  not  attract  the  expected
attention.


MANAGEMENT OF THE FUND

The Board of Trustees  oversees the management of the Funds. A list of the Board
members and of the Funds'  officers may be found in the  Statement of Additional
Information. BAMCO, Inc., the Adviser, is located at 767 Fifth Avenue, New York,
New York 10153, and is responsible for portfolio management.  It is a subsidiary
of Baron Capital Group, Inc. ("BCG").  Baron Capital, Inc. ("Baron Capital"),  a
registered broker-dealer and the distributor of the shares of the Funds, is also
a subsidiary of BCG.

Ronald Baron is the founder,  president, chief executive officer and chairman of
the Adviser and BCG and is the principal owner of BCG. Morty Schaja is the chief
operating officer of the Adviser and BCG.

Mr. Baron has been the portfolio  manager of BARON ASSET FUND and BARON GROWTH &
INCOME FUND since their  inception.  He has managed money for others since 1975.
Beginning in January 1999,  BARON GROWTH & INCOME FUND is managed by a team that
is headed by Ron Baron and that includes Matt Ervin and Mitch Rubin.  Matt Ervin
has been an analyst  with Baron Funds for 4 years and before that was an analyst
at another large money management firm. Mitch Rubin has worked at Baron Funds as
a analyst for 3 years and before that was an analyst at a large  brokerage firm.
Clifford  Greenberg has been the portfolio manag

12 PROSPECTUS

<PAGE>
er of BARON SMALL CAP FUND since its inception. Mr. Greenberg joined Baron Funds
in  January  of 1997.  He was a general  partner  and  portfolio  manager at HPB
Associates,  L.P., an investment  partnership  from January 1990 until he joined
Baron Funds. The portfolio managers are primarily responsible for the day-to-day
management  of the  portfolios.  They also may serve as  portfolio  managers  or
analysts for other products offered by affiliates that could conflict with their
responsibilities  to the Funds.  The Adviser  also keeps the books of account of
each Fund, and calculates daily the income and net asset value per share of each
Fund.  For its  services,  the Adviser  receives a fee payable  monthly from the
assets of each  Fund  equal to 1% per annum of each  Fund's  respective  average
daily net asset value.

Brokerage transactions for the Funds in exchange-listed  securities are executed
primarily by or through the Adviser's affiliate,  Baron Capital, when consistent
with  trying to obtain the best net results  for the Funds.  Baron  Capital is a
registered  broker-dealer  and a member of the NASD. Please see the Statement of
Additional Information for more information about trade executions.

YEAR 2000 Fund operations and  shareholders  could be adversely  affected if the
computer  systems used by BAMCO, the Funds' other service  providers,  and other
entities with computer  systems  linked to the Fund do not properly  process and
calculate  date- related  information  from and after January 1, 2000.  BAMCO is
working to avoid these  problems  and to obtain  assurances  from other  service
providers that they are taking similar  steps.  In addition,  to the extent that
operations  of  issuers  of  securities  held  by  the  Funds  are  impaired  by
date-related  problems  or  prices  decline  as a  result  of real or  perceived
date-related  problems of issuers held by the Fund or  generally,  the net asset
value of the Funds will decline.

12b-1 PLAN
The Funds have  adopted a plan  under  rule  12b-1  that  allows the Fund to pay
distribution fees for the sale and distribution of their shares and for services
provided to shareholders.  Because the fees are paid out of the Funds' assets on
an  on-going  basis,  over  time  these  fees  will  increase  the  cost of your
investment and may cost you more than paying other types of sales  charges.  The
12b-1 plan authorizes the Fund to pay Baron Capital a distribution  fee equal on
an  annual  basis to 0.25% of each  Fund's  average  daily net  assets.  See the
Statement of Additional  Information for a more detailed listing of the expenses
covered by the Distribution Plan.



                                                               PROSPECTUS 13

<PAGE>

INFORMATION ABOUT YOUR INVESTMENT

HOW YOUR SHARES ARE PRICED
The  purchase or sale price for your shares is the  particular  Fund's net asset
value  per  share  ("NAV"),  which is  generally  calculated  as of the close of
trading of the New York Stock Exchange  (usually 4:00 p.m. Eastern time) on each
day the Exchange is open.  Your  purchase or sale will be priced at the next NAV
calculated  after your order is accepted by the Baron Funds'  transfer agent. If
you purchase or sell shares through a brokerage  firm,  bank or other  financial
institution,  your  transaction  will receive the NAV next calculated  after the
financial  institution  receives  your  order  and  transmits  it to the  Funds'
transfer agent.  The Funds'  investments are valued based on the last sale price
or where market  quotations  are not readily  available,  based on fair value as
determined  by  the  Adviser,  using  procedures  established  by the  Board  of
Trustees. The Funds may have arrangements with certain institutions with respect
to the actual  receipt of orders.  The Funds may change the time at which orders
are priced if the Exchange closes at a different time or an emergency exists.

HOW TO PURCHASE SHARES
You may purchase shares of the Funds directly without paying a sales charge.  An
application is included with this prospectus. Special applications are available
to open individual retirement accounts ("IRAs").  The minimum initial investment
is $2,000  unless you choose to invest  through the Baron  InvestPlan  (see page
XX).  There is no minimum  for  subsequent  purchases.  The Funds may reject any
proposed purchase.

At present,  only U.S. citizens and non-U.S.  citizens with a tax identification
number who reside in the U.S. may purchase shares of the Funds.  Please call the
Funds' transfer agent at 1-800- 442-3814, if you have any questions.

You may invest or add to your account using any of the following methods:

BY MAIL
To open a new account send your signed  application form with your check payable
to BARON FUNDS to:
       Baron Funds
       P.O. Box 419946
       Kansas City, MO 64141-6946

Please  make sure you  indicate  how much money you want  invested in each Fund.
Checks must be payable in U.S.  dollars and must be drawn on a U.S. bank.  Third
party checks, credit cards and cash will not be accepted.



14 PROSPECTUS

<PAGE>

When adding to your account complete the additional  investment form provided at
the bottom of your  account  statement or purchase  confirmation.  If you do not
have that form,  write a note  indicating  in which  Baron  Fund the  investment
should go and the account number. Send it to the address above.

BY WIRE
You can make your initial or additional  investments in the Funds by wire. To do
so: (1) contact the Funds' transfer agent, DST Systems,  Inc., at 1-800-442-3814
to obtain an account number. (2) Complete and sign the application form and mail
it to Baron Funds,  P.O. Box 419946,  Kansas City, MO  64141-6946.  (3) Instruct
your bank to wire funds to the United  Missouri Bank of Kansas City,  N.A.,  ABA
No. 1010-0069-5, Account No. 98-7037-101-4. (4) Be sure to specify the following
information in the wire: (a) Fund you are buying,  (b) your account number,  (c)
your name, and (d) your wire number.

Please  be sure to  include  your  name  and  account  number.  The  Fund is not
responsible for delays in the wiring process.

BY TELEPHONE
Once  your  account  is open you may add to your  investment  by  telephone  and
exchange  among  the  Baron  Funds  if  you  have  elected  that  option  on the
application.  By choosing this option you authorize  Baron Funds to draw on your
bank account. Please note that your accounts must be identically registered.  To
add this option to your account, call 1-800-442-3814 for the forms.

BARON INVESTPLAN
Baron  InvestPlan  is an automatic  investment  plan  offered by the Funds.  The
minimum initial investment is $500 with monthly  investments of as little as $50
automatically  invested  from  your  checking  account.  To  enroll in the Baron
InvestPlan,  complete the Enrollment Form (available by calling 1-800-99-BARON),
attach a voided  check and mail them to Baron  Funds,  P.O.  Box 419946,  Kansas
City, MO 64141-6946.

THROUGH BROKER-DEALERS
You may purchase shares of the Funds through a broker-dealer  or other financial
institution  that may  charge a  transaction  fee.  If you  purchase  the shares
directly  from  the  Funds,  no  transaction  fee is  charged.  The  Funds  also
participate in no transaction fee programs with many national brokerage firms.

                                                        PROSPECTUS 15

<PAGE>

HOW TO REDEEM SHARES

You may redeem your shares of the Funds by any of the methods  described  below.
There are no  redemption  charges.  If you are selling  shares in an IRA account
please read the information in the IRA kit.  Redemptions  will not be made until
all of the requirements for redemption are met.

Redemptions are priced at the next NAV calculated after your redemption  request
is  received  in  proper  form.  If you  have  recently  purchased  shares  your
redemption  request may not be honored until the purchase check has cleared your
bank, which generally occurs within ten calendar days.

BY MAIL
Write  a  letter  that  includes  the  following  information:  the  name of the
registered  owner(s) of the account,  the name of the Fund, the number of shares
or dollar  amount to be  redeemed,  and the account  number.  The letter must be
signed  in  exactly  the same  way the  account  is  registered,  including  the
signature of each joint owner,  if applicable.  Mail the request to the transfer
agent at:
           Baron Funds
           P.O. Box 419946
           Kansas City, MO 64141-6946.

A SIGNATURE GUARANTEE IS REQUIRED FOR REDEMPTIONS GREATER THAN $50,000.  See the
"Special  Information About  Redemptions"  section on page XX. Within three days
after receipt of a redemption  request by the transfer agent in proper form, the
Fund will normally mail you the proceeds.

BY TELEPHONE
If you have  selected  the  telephone  redemption  option  when you opened  your
account,  you may redeem  your shares by  telephone.  To add this option to your
account call  1-800-442-3814  for a telephone  redemption  form. Once made, your
telephone  request cannot be changed.  The minimum amount that you may redeem by
telephone is $1,000.  The maximum amount that you may redeem by telephone in any
quarter is $50,000.  You may receive  the  proceeds by any one of the  following
methods:  (a) we will  mail a check to the  address  to which  your  account  is
registered,  (b) we will transmit the proceeds by electronic funds transfer to a
pre-authorized bank account (usually a two banking day process),  or (c) we will
wire the proceeds to a  pre-authorized  bank account for a $10.00 fee (usually a
next banking day process).

The Funds have the right to refuse a  telephone  redemption  if they  believe it
advisable  to do so.  If you  have  selected  the  telephone  option  you may be
responsible  for any fraudulent  telephone  order as long as the Funds and their
transfer agent use reasonable procedures to confirm that telephone  instructions
are genuine.

16 PROSPECTUS

<PAGE>

BY BROKER-DEALER
You may redeem  shares  through  broker-dealers  or other  institutions  who may
charge you a fee. The Funds may have special redemption  procedures with certain
broker-dealers.

SPECIAL INFORMATION ABOUT REDEMPTIONS

If the amount to be redeemed is greater than $50,000, all of the signatures on a
redemption  request and/or  certificate must be guaranteed.  If you have changed
your address within 30 days of a redemption  request,  a signature  guarantee is
required.  A signature guarantee helps protect you and the Funds from fraud. You
can obtain a signature  guarantee from most securities  firms or banks,  but not
from a notary public. If you are redeeming  $50,000 or less per quarter,  and if
proceeds are sent to the address of record, no signature  guarantee is required.
For joint  accounts,  each signature must be guaranteed.  Please call if you are
unsure of any of the  requirements.  Please  remember  that the  Funds  will not
redeem your shares until the original  letter of instruction  with the signature
guarantee in proper form has been received by the transfer agent.

Any Fund share  certificates  that have been issued  must be returned  with your
redemption  request.  The transfer  agent may require other  documentation  from
corporations,  trustees,  executors,  and  others  who hold  shares on behalf of
someone else. If you have any questions concerning the requirements, please call
the transfer agent at 1-800-442-3814.  Redemptions will not be made until all of
the conditions,  including receipt of all required documentation by the transfer
agent, have been satisfied.

A redemption or exchange of Fund shares may generate a tax liability.

If you redeem  more than  $250,000 or 1% of the net asset value of a Fund during
any 90-day period,  the Fund has the right to pay the redemption  price,  either
totally or partially, by a distribution of portfolio securities instead of cash.

If your account falls below $2,000 because of withdrawals,  the Fund may ask you
to increase  your balance.  If it is still below $2,000 after 60 days,  the Fund
may close your account and send you the proceeds.

The Funds may suspend the normal  redemption  process if trading on the New York
Stock Exchange is suspended or if an emergency exists that reasonably  precludes
the valuation of the Funds' net assets.



                                                               PROSPECTUS 17

<PAGE>

DISTRIBUTIONS AND TAXES
Each Fund pays its  shareholders  dividends from its net  investment  income and
distributes any net realized  capital gains once each year.  Your  distributions
will be reinvested in the Fund unless you instruct the Fund otherwise. There are
no charges on reinvestments.  After every distribution,  the value of a share is
automatically  reduced  by the amount of the  distribution.  If you elect not to
reinvest and the postal or other delivery service is unable to deliver checks to
your address of record,  your  distribution  will be  reinvested  in  additional
shares. No interest will accrue on amounts represented by uncashed  distribution
or redemption checks.

You are  subject  to  federal  income  tax on Fund  distributions,  unless  your
investment is in an IRA or other  tax-advantaged  account. The tax status of any
distribution  is the same  regardless  of how long you have invested in the Fund
and whether you reinvest  your  distributions  or take them in cash.  Income and
short-term  capital gain  distributions  are taxed at the ordinary  income rate.
Long-term capital gains  distributions are taxed at either 10% or 20%, depending
on your tax bracket.  The tax status of the annual distribution will be detailed
in an annual tax statement from the Fund. Distributions declared by the Fund may
also be subject to state and local taxes.  You should  consult with your own tax
adviser regarding your personal tax situation.

If you do not  provide  the Fund with your valid  social  security  or  taxpayer
identification number, you will be subject to backup withholding for taxes.

GENERAL INFORMATION

CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
The Bank of New York, 48 Wall Street,  New York, New York 10015 is the custodian
for the Baron Funds' cash and securities.  DST Systems,  Inc. serves as transfer
agent and dividend disbursing agent for the shares. They are not responsible for
investment decisions for the Baron Funds.

SHAREHOLDER INFORMATION
If you have  questions  about your account or  transactions  please  contact the
transfer agent, DST Systems,  Inc., P.O. Box 419946, Kansas City, MO 64141-6946,
or by telephone to 1-800-442-3814.

If you have  questions  about  general  Fund  information  please call the Baron
Funds' office at 1-800-99-BARON or 212-583-2100.

As a Massachusetts business trust, annual shareholder meetings are not required.
The Funds send quarterly reports to shareholders.

18 PROSPECTUS

<PAGE>
<PAGE>
[BACK COVER]

[REGISTERED CASTLE LOGO]
     BARON
     FUNDS

767 Fifth Avenue
NY, NY 10153
1-800-99-baron


FOR MORE INFORMATION
Investors  who want  more  information  about the Baron  Funds  may  obtain  the
following documents free upon request at the numbers or address below.

SHAREHOLDER REPORTS
Additional  information about the Funds'  investments is available in the Fund's
quarterly  reports to Shareholders.  In the Funds' annual report you will find a
discussion of the market conditions and investment strategies that significantly
affected the Funds' performance during the last fiscal year.

STATEMENT OF ADDITIONAL INFORMATION
Additional  information  is  also  contained  in  the  Statement  of  Additional
Information dated January ,1999. A current  Statement of Additional  Information
is  on  file  with  the  Securities  and  Exchange  Commission  ("SEC")  and  is
incorporated   by  reference.   You  may  obtain  the  Statement  of  Additional
Information and the shareholder reports without charge by writing or calling the
Funds.

TO OBTAIN INFORMATION
By telephone:              Call 1-800-992-2766

By mail, write to:         Baron Funds
                           767 Fifth Avenue
                           New York, NY 10153

By e-mail:                 Send your request to: 
                           [email protected]

On the internet:           Text-only versions of Baron Funds documents can be 
                           viewed on-line or downloaded from:
                           http://www.baronfunds.com

or from:                   http://www.sec.gov

OTHER
You can also  obtain  copies by  visiting  the SEC's  Public  Reference  Room in
Washington,  D.C.  (phone  1-800-SEC-0330).  Copies of this  information  may be
obtained,  upon payment of a  duplicating  fee, by writing the Public  Reference
Section of the SEC, Washington, D.C. 20549-6009.



Ticker Symbols:            Baron Asset Fund             BARAX
                           Baron Growth & Income Fund   BGINX
                           Baron Small Cap Fund         BSCFX

SEC file number:  811-5032                                           99PROSP

<PAGE>

                        BARON ASSET FUND
                   BARON GROWTH & INCOME FUND
                      BARON SMALL CAP FUND

                        767 Fifth Avenue
                    New York, New York 10153
                         (800) 99-BARON
                          212-583-2100

                    ________________________


              STATEMENT OF ADDITIONAL INFORMATION
                        January 20, 1999

                    ________________________


This Statement of Additional Information ("SAI") is not a prospectus. The Fund's
Prospectus, dated January 20, 1999, may be obtained without charge by writing or
calling the Funds at the address and telephone number above.


                     ________________________



















No  person  has  been  authorized  to  give  any  information  or  to  make  any
representations  other  than  those  contained  in  this  SAI or in the  related
Prospectus.






<PAGE>
                        TABLE OF CONTENTS



                                                      Page in
                                                      Statement
                                                      of
                                                      Additional     Page in
                                                      Information    Prospectus


FUND HISTORY AND CLASSIFICATION.................          3
  Investment Goals, Strategies and Risks........          3             3, 10
  Options Transactions and Swaps................          6             11
  Use of Segregated and Other Special Accounts..          7
  Investment Restrictions.......................          8
  Turnover Rate.................................         10


MANAGEMENT OF THE FUNDS.........................         10             12
  Board of Trustees and Officers................         10
  Principal Holders of Shares...................         13
  Investment Adviser............................         13
  Distribution Plan.............................         15             13
  Brokerage.....................................         17
  Custodian, Transfer Agent and Dividend Agent..         19             18


REDEMPTION OF SHARES............................         19             16


NET ASSET VALUE.................................         19             14

TAXES...........................................         19             18


ORGANIZATION AND CAPITALIZATION.................         20
  General.......................................         20            18
  Shareholder and Trustee Liability.............         21            18


OTHER INFORMATION...............................         21

<PAGE>
FUND HISTORY AND CLASSIFICATION 
- --------------------------------

BARON  ASSET  FUND is a no-load,  open-end,  diversified  management  investment
company  organized  as a  series  fund  and  established  under  the laws of the
Commonwealth  of  Massachusetts  on February  19,  1987.  There are three series
currently available (individually a "Fund" and collectively the "Funds"):  BARON
ASSET FUND,  started in June of 1987,  BARON  GROWTH & INCOME  FUND,  started in
January of 1995, and BARON SMALL CAP FUND, started October 1, 1997.

INVESTMENT GOALS,  STRATEGIES AND RISKS
- ---------------------------------------

BARON ASSET FUND's investment  objective is to seek capital appreciation through
investments in securities of small and medium sized  companies with  undervalued
assets or favorable growth  prospects.  BARON GROWTH & INCOME FUND's  investment
objective is to seek capital  appreciation with income as a secondary objective.
BARON SMALL CAP FUND's  investment  objective  is to seek  capital  appreciation
through investments primarily in securities of small companies. BARON ASSET FUND
and BARON GROWTH & INCOME FUND invest  primarily in small sized  companies  with
market  capitalizations of approximately $100 million to $1.5 billion and medium
sized companies with market values of $1.5 billion to $5 billion. BARON GROWTH &
INCOME FUND also  invests in debt  securities.  BARON SMALL CAP FUND  invests at
least 65% of its total assets,  measured at cost,  in the  securities of smaller
companies with market values of up to $1 billion. It may invest up to 35% in the
securities of larger companies.

In addition to the principal investment strategies of the Funds described in the
Prospectus  on  pages 3 and 10,  the  Funds  may use the  additional  strategies
described below.  These investment  strategies are not fundamental  policies and
may be changed by the Fund's Board of Trustees.  Shareholders  would be notified
of any material changes. Some of the strategies discussed below are mentioned in
the Prospectus, but are explained in more detail here.

FOREIGN  SECURITIES  The Funds may  invest up to 10% of their  respective  total
assets  directly in the  securities  of foreign  issuers  which are not publicly
traded in the U.S. and may also invest in foreign securities in domestic markets
through  depositary  receipts  without  regard to this  limitation.  The Adviser
currently  intends to invest  not more than 10% of the Funds'  assets in foreign
securities,  including  both direct  investments  and  investments  made through
depositary   receipts.   These  securities  may  involve  additional  risks  not
associated  with  securities  of domestic  companies,  including  exchange  rate
fluctuations,  political or economic  instability,  the  imposition  of exchange
controls,  or  expropriation  or  confiscatory  taxation.   Issuers  of  foreign
securities are subject to different, often less detailed, accounting,  reporting
and disclosure  requirements than are domestic issuers.  The Funds may invest in
securities  commonly  known as American  Depository  Receipts  ("ADRs"),  and in
European  Depository  Receipts  ("EDRs") or other  securities  convertible  into
securities of foreign issuers.  ADRs are certificates  issued by a United States
bank or trust company and represent the right to receive securities of a foreign
issuer  deposited in a domestic  bank or foreign  branch of a United States bank
and traded on a United States exchange or in an over-the-  counter market.  EDRs
are receipts issued in Europe generally by a non-U.S. bank or trust company that
evidence ownership of non-U.S. or domestic  securities.  Generally,  ADRs are in
registered  form and EDRs are in bearer  form.  There are no fees imposed on the
purchase or sale of ADR's or EDRs although the issuing bank or trust company may
impose fees on the purchase of  dividends  and the  conversion  of ADRs and EDRs
into the underlying  securities.  Investment in ADRs has certain advantages over
direct investment in the underlying non-U.S. securities, since (i) ADRs are U.S.
dollar  denominated  investments  which are  easily  transferable  and for which
market  quotations are readily  available and (ii) issuers whose  securities are
represented by ADRs are subject to the same  auditing,  accounting and financial
reporting standards as domestic issuers. EDRs are not necessarily denominated in
the currency of the underlying security.

                                    -3-
<PAGE>

LENDING The Funds may lend their portfolio securities to institutions as a means
of earning additional income. In lending their portfolio  securities,  the Funds
may incur  delays in  recovery of loaned  securities  or a loss of rights in the
collateral.  To minimize  such risks,  such loans will only be made if the Funds
deem the other  party to be of good  standing  and  determines  that the  income
justifies  the risk.  BARON  ASSET FUND will not lend more than 10% of its total
assets  and BARON  GROWTH & INCOME  FUND and BARON  SMALL CAP FUND will not lend
more than 25% of their respective total assets.

MORTGAGE-BACKED SECURITIES BARON GROWTH & INCOME FUND may invest up to 5% of its
assets in  mortgage-backed  securities  that are  issued or  guaranteed  by U.S.
government  agencies  or  instrumentalities,  such  as the  Government  National
Mortgage   Association   and  the   Federal   National   Mortgage   Association.
Mortgage-backed securities represent direct or indirect participation in, or are
secured by and payable  from,  mortgage  loans secured by real  property.  These
securities are subject to the risk that prepayments on the underlying  mortgages
will cause the  principal and interest on the  mortgage-backed  securities to be
paid prior to their stated maturities.  Mortgage  prepayments are more likely to
accelerate during periods of declining long-term interest rates. If a prepayment
occurs, BARON GROWTH & INCOME FUND may have unanticipated  proceeds which it may
then have to invest at a lower interest rate, and may be penalized by not having
participated in a comparable security not subject to prepayment.

WHEN-ISSUED  SECURITIES The Funds may invest up to 5% of their respective assets
in debt and equity  securities  purchased on a when-issued  basis.  Although the
payment and interest terms of when-issued securities are established at the time
the purchaser enters into the commitment, the actual payment for and delivery of
when-issued  securities generally takes place within 45 days. The Fund bears the
risk that  interest  rates on debt  securities  at the time of  delivery  may be
higher or lower than those contracted for on the when-issued  security.  Failure
of the issuer to deliver  the  security  purchased  on a  when-issued  basis may
result in a loss or missed opportunity to make an alternative investment.

MEDIUM AND LOWER RATED  CORPORATE DEBT SECURITIES All of the Funds may invest in
debt securities.  BARON GROWTH & INCOME FUND and BARON SMALL CAP FUND may invest
up to 35% of their  respective  total assets in securities that are rated in the
medium to lowest  rating  categories  by S&P and  Moody's,  some of which may be
known as "junk bonds."
 
The Funds  will rely on the  Adviser's  judgment,  analysis  and  experience  in
evaluating debt  securities.  The Adviser  believes that the difference  between
perceived risk and actual risk creates the  opportunity  for profit which can be
realized through thorough analysis. Ratings by S&P and Moody's evaluate only the
safety of principal and interest  payments,  not market value risk.  Because the
creditworthiness  of an issuer may change more rapidly than is able to be timely
reflected  in changes in credit  ratings,  the Adviser  monitors  the issuers of
corporate  debt  securities  held in the Funds'  portfolio.  The credit  ratings
assigned by a rating  agency to a security are not  considered by the Adviser in
selecting a security.  The Adviser examines the intrinsic value of a security in
light of market conditions and the underlying fundamental values. Because of the
nature of medium and lower rated corporate debt  securities,  achievement by the
Funds  of  their  respective   investment  objectives  when  investing  in  such
securities is dependent on the credit analysis of the Adviser. The Adviser could
be wrong in its analysis.  If the Funds  purchased  primarily  higher rated debt
securities, risks would be substantially reduced.

A general  economic  downturn or a significant  increase in interest rates could
severely disrupt the market for medium and lower grade corporate debt securities
and adversely affect the market value of such securities. The ability of issuers
of medium and lower grade  corporate debt  securities to repay  principal and to
pay  interest,  to  meet  projected  business  goals  and to  obtain  additional
financing may be adversely  affected by economic  conditions.  Such consequences
could  lead to an  increased  incidence  of  default  for  such  securities  and
adversely  affect  the  value  of the  corporate  debt  securities  in a

                                    -4-
<PAGE>

Fund's  portfolio.  The  secondary  market  prices  of medium  and  lower  grade
corporate  debt  securities are more  sensitive to adverse  economic  changes or
individual corporate developments than are higher rated debt securities. Adverse
publicity and investor  perceptions,  whether or not based on rational analysis,
and periods of economic  uncertainty  may also affect the value and liquidity of
medium and lower grade  corporate  debt  securities,  although such factors also
present investment opportunities when prices fall below intrinsic values. Yields
on debt  securities  in the portfolio  that are interest  rate  sensitive can be
expected to fluctuate over time.

To the extent that there is no established  market for some of the medium or low
grade corporate debt securities in which the Funds may invest, there may be thin
or no  trading  in such  securities  and the  ability  of the  Adviser  to value
accurately such securities may be adversely  affected.  Further,  it may be more
difficult for a Fund to sell  securities for which no established  retail market
exists as compared with  securities  for which such a market does exist.  During
periods of reduced  market  liquidity  and in the  absence of readily  available
market quotations for medium and lower grade corporate debt securities held in a
Fund's  portfolio,  the  responsibility  of the  Adviser  to value  that  Fund's
securities  becomes more difficult and the Adviser's judgment may play a greater
role in the valuation of the Fund's securities due to a reduced  availability of
reliable objective data.

To the extent that a Fund purchases illiquid  securities or securities which are
restricted  as to  resale,  that Fund may  incur  additional  risks  and  costs.
Illiquid and restricted  securities may be  particularly  difficult to value and
their  disposition  may  require  greater  effort and  expense  than more liquid
securities.  A Fund may be  required  to  incur  costs  in  connection  with the
registration  of restricted  securities in order to dispose of such  securities,
although under Rule 144A under the Securities Act of 1933 certain securities may
be  determined  to be liquid  pursuant  to  procedures  adopted  by the Board of
Trustees  under  applicable  guidelines.  The Funds may invest in  securities of
distressed issuers when the intrinsic values of such securities,  in the opinion
of the Adviser, warrant such investment.

OTHER DEBT  SECURITIES  The Funds may invest in  zero-coupon,  step-coupon,  and
pay-in-kind  securities.  These  securities are debt securities that do not make
regular interest payments.  Zero-coupon and step-coupon securities are sold at a
deep discount to their face value;  pay-in-kind  securities pay interest through
the issuance of additional securities. The market value of these debt securities
generally  fluctuates  in  response  to changes in  interest  rates to a greater
degree than  interest-paying  securities  of  comparable  term and quality.  The
secondary  market value of corporate debt  securities  structured as zero coupon
securities  or  payment-in-kind  securities  may be more volatile in response to
changes in interest rates than debt securities  which pay interest  periodically
in cash. Because such securities do not pay current interest, but rather, income
is  accrued,  to the  extent  that a Fund does not have  available  cash to meet
distribution  requirements  with respect to such income, it could be required to
dispose of portfolio  securities that it otherwise  would not. Such  disposition
could be at a disadvantageous price. Investment in such securities also involves
certain tax considerations.

BARON  GROWTH & INCOME  FUND and BARON SMALL CAP FUND from time to time may also
purchase indebtedness and participations therein, both secured and unsecured, of
debtor companies in reorganization or financial restructuring. Such indebtedness
may be in the form of loans, notes, bonds or debentures. When the Funds purchase
a participation interest they assume the credit risk associated with the bank or
other  financial  intermediary  as well as the credit risk  associated  with the
issuer of any underlying debt instrument.  The Funds may also purchase trade and
other claims against, and other unsecured obligations of, such debtor companies,
which  generally  represent  money due a supplier  of goods or  services to such
company.  Some  debt  securities  purchased  by the  Funds  may have  very  long
maturities.  The  length of time  remaining  until  maturity  is one  factor the
Adviser  considers  in  purchasing a  particular  indebtedness.  The purchase of
indebtedness   of  a  troubled   company  always  involves  a  risk  as  to  the
creditworthiness  of the issuer and the  possibility  that the investment may be
lost. The Adviser believes 

                                    -5-
<PAGE>

that  the  difference  between  perceived  risk  and  actual  risk  creates  the
opportunity for profit which can be realized  through thorough  analysis.  There
are no established  markets for some of this  indebtedness and it is less liquid
than more heavily  traded  securities.  Indebtedness  of the debtor company to a
bank are not  securities  of the banks  issuing or selling  them.  The Funds may
purchase loans from national and state  chartered banks as well as foreign ones.
The Funds may invest in senior indebtedness of the debtor companies, although on
occasion  subordinated  indebtedness  may also be  acquired.  The Funds may also
invest in distressed  first mortgage  obligations and other debt secured by real
property.  The Funds do not currently anticipate investing more than 5% of their
respective assets in trade and other claims.

The Funds may enter into  repurchase  agreements  with certain banks or non-bank
dealers. In a repurchase agreement the Fund buys a security at one price, and at
the time of sale,  the seller agrees to  repurchase  that security at a mutually
agreed upon time and price. Repurchase agreements could involve certain risks in
the event of the failure of the seller to repurchase  the  securities as agreed,
which  may  cause a fund to  suffer a loss,  including  loss of  interest  on or
principal of the security,  and costs  associated  with delay and enforcement of
the repurchase  agreement.  Repurchase  agreements  with a duration of more than
seven days are considered illiquid securities.

As a form of borrowing,  BARON GROWTH & INCOME FUND and BARON SMALL CAP FUND may
engage in reverse repurchase  agreements with certain banks or non-bank dealers,
where the Fund sells a security and  simultaneously  agrees to buy it back later
at a  mutually  agreed  upon  price.  To the  extent a Fund  engages  in reverse
repurchase agreements it will maintain a segregated account consisting of liquid
assets  or  highly  marketable  securities  to cover  its  obligations.  Reverse
repurchase  agreements may expose the Fund to greater  fluctuations in the value
of its assets.

OPTIONS TRANSACTIONS AND SWAPS
- ------------------------------

BARON ASSET FUND may write  (sell)  covered call options or purchase put options
on equity and/or debt securities. BARON GROWTH & INCOME FUND and BARON SMALL CAP
FUND may (write)  sell put and covered  call  options and  purchase put and call
options on equity and/or debt  securities.  The Funds may also enter into equity
swap  transactions.  All calls sold by the Funds must be "covered" (i.e., a Fund
must  own  the  underlying  securities)  or  must  meet  the  asset  segregation
requirements  described below as long as the call is outstanding.  Even though a
Fund will  receive the option  premium to help  protect it against  loss, a call
sold by a Fund exposes that Fund during the term of the option to possible  loss
of  opportunity  to realize  appreciation  in the market price of the underlying
security or instrument and may require the Fund to hold a security or instrument
which it might otherwise have sold.

A put option gives the purchaser of the option,  upon payment of a premium,  the
right to sell,  and the writer  the  obligation,  when  exercised,  to buy,  the
underlying  security,  at the exercise  price. A call option,  upon payment of a
premium,  gives the  purchaser of the option the right to buy, and the seller if
exercised,  the  obligation  to sell,  the  underlying  security at the exercise
price.  An American style put or call option may be exercised at any time during
a fixed period while a European  style put or call option may be exercised  only
upon expiration or during a fixed period prior thereto, and the Funds may engage
in either style option.  The Funds are authorized to engage in transactions with
respect to exchange-listed options, over-the-counter options ("OTC options") and
other derivative investments.  Exchange-listed options are issued by a regulated
intermediary such as the Options Clearing Corporation ("OCC"),  which guarantees
the  performance  of the  obligations  of  the  parties  to  such  options.  The
discussion  below uses the OCC as an example,  but is also  applicable  to other
financial intermediaries.

Rather than taking or making  delivery of the  underlying  security  through the
process of exercising the option,  listed options are usually closed by entering
into offsetting purchase or sale transactions that do not result in ownership of
the new option.  The Fund's  ability to close out its position as a

                                    -6-
<PAGE>

purchaser  or  seller  of an OCC or  exchange-  listed  put or  call  option  is
dependent,  in part, upon the liquidity of the option market. Among the possible
reasons  for the  absence of a liquid  option  market on an  exchange  are:  (i)
insufficient   trading  interest  in  certain  options;   (ii)  restrictions  on
transactions imposed by an exchange;  (iii) trading halts,  suspensions or other
restrictions  imposed with respect to particular classes or series of options or
underlying  securities  including reaching daily price limits; (iv) interruption
of the  normal  operations  of the OCC or an  exchange;  (v)  inadequacy  of the
facilities of an exchange or OCC to handle  current  trading  volume;  or (vi) a
decision by one or more  exchanges to  discontinue  the trading of options (or a
particular  class or series of options),  in which event the relevant market for
that option on that exchange would cease to exist,  although outstanding options
on that exchange would  generally  continue to be exercisable in accordance with
their terms.  The hours of trading for listed  options may not coincide with the
hours during which the underlying instruments are traded. To the extent that the
option  markets  close  before  the  markets  for  the  underlying  instruments,
significant  price and rate movements can take place in the  underlying  markets
that cannot be reflected in the option markets.

OTC  options  are  purchased  from  or  sold to  securities  dealers,  financial
institutions  or  other  parties  ("Counterparties")  through  direct  bilateral
agreement with the Counterparty.  In contrast to exchange-listed  options, which
generally have standardized terms and performance mechanics, all the terms of an
OTC option are  negotiated by the parties.  The Funds expect  generally to enter
into OTC options that have cash  settlement  provisions,  although  they are not
required to do so.

Equity swap transactions are entered into with financial  institutions through a
direct agreement with the Counterparty,  generally an ISDA Master Agreement, the
specific terms of which are negotiated by the parties.  The Funds may use equity
swaps, or other derivative  instruments,  for hedging purposes against potential
adverse movements in security prices or for non-hedging purposes such as seeking
to  enhance  return.  The  Funds may be  required  to post  collateral  for such
transactions.

Unless the  parties  provide  for it,  there is no central  clearing or guaranty
function in an OTC option or derivatives,  including swaps. As a result,  if the
Counterparty fails to make or take delivery of the security, or other instrument
or fails to make a cash settlement payment due in according with the option, the
Fund will lose any  premium  it paid for the  option as well as any  anticipated
benefit of the transaction. The Adviser must assess the creditworthiness of each
Counterparty to determine the likelihood that the terms of the OTC option or the
derivative will be satisfied.  The Funds will engage in OTC option  transactions
and derivatives only with previously approved  Counterparties.  The staff of the
SEC  currently  takes the position  that OTC options  purchased  by a fund,  and
portfolio securities  "covering" the amount of the fund's obligation pursuant to
an OTC  option  sold by it (the  cost of the  sell-back  plus  the  in-the-money
amount,  if any,) are  illiquid,  and are  subject  to a fund's  limitations  on
investments in illiquid securities.

USE OF SEGREGATED  AND OTHER  SPECIAL  ACCOUNTS
- -----------------------------------------------

Many hedging  transactions,  in addition to other  requirements,  require that a
Fund  segregate  liquid high grade assets with its  custodian to the extent Fund
obligations  are not otherwise  "covered"  through  ownership of the  underlying
security or instrument.  In general, either the full amount of any obligation by
the Fund to pay or deliver  securities or assets must be covered at all times by
the  securities  or  instruments  required to be delivered,  or,  subject to any
regulatory  restrictions,  an amount of cash or liquid high grade  securities at
least equal to the current amount of the obligation  must be segregated with the
custodian. The segregated assets cannot be sold or transferred unless equivalent
assets are substituted in their place or it is no longer  necessary to segregate
them.  For  example,  a call option  written by a Fund will require that Fund to
hold the  securities  subject to the call (or  securities  convertible  into the
needed securities without additional  consideration) or to segregate liquid high
grade

                                    -7-
<PAGE>

securities  sufficient  to purchase  and deliver the  securities  if the call is
exercised.  A put option written requires that the Fund segregate  liquid,  high
grade assets equal to the exercise price. Hedging transactions may be covered by
other means when consistent with applicable regulatory policies.

INVESTMENT RESTRICTIONS
- -----------------------

BARON  ASSET FUND,  BARON  GROWTH & INCOME  FUND,  and BARON SMALL CAP FUND have
adopted investment restrictions, described below, which are fundamental policies
of the  Funds  and  may  not be  changed  without  the  approval  of the  Funds'
shareholders.  Unless otherwise noted, all percentage  restrictions are measured
as of the time of the investment after giving effect to the transaction.

BARON ASSET FUND may not:

1.   Issue senior securities  except in connection with any permitted  borrowing
     where the Fund is deemed to have issued a senior security;
2.   Borrow  money  except  from banks for  temporary  purposes in an amount not
     exceeding 5% of the Fund's net assets at the time the borrowing is made;
3.   Purchase  securities on margin except for short-term  credit  necessary for
     the clearance of portfolio transactions;
4.   Make short sales of  securities,  maintain a short  position,  or write put
     options;
5.   Purchase or sell commodities or commodity contracts;
6.   Purchase or sell real estate or real estate mortgage loans or invest in the
     securities of real estate  companies  unless such  securities  are publicly
     traded;
7.   Invest in oil, gas or mineral-related programs or leases;
8.   Invest more than 25% of the value of its total assets in any one  industry,
     except investments in U.S. government securities;
9.   Purchase the securities of any one issuer other than the U.S. government or
     any of  its  agencies  or  instrumentalities,  if  immediately  after  such
     purchase  more than 5% of the value of the  Fund's  total  assets  would be
     invested  in such  issuer  or the  Fund  would  own  more  than  10% of the
     outstanding voting securities of such issuer,  except that up to 25% of the
     value of the Fund's total assets may be invested  without  regard to the 5%
     and 10% limitations;
10.  Invest more than 10% of the value of the Fund's total assets in  securities
     which are  restricted or illiquid or in repurchase  agreements  maturing or
     terminable in more than seven days;
11.  Invest in  securities  of other open end  investment  companies  (except in
     connection with a merger,  consolidation or other reorganization and except
     for the purchase of shares of registered open-end money market mutual funds
     if double advisory fees are not assessed), invest more than 5% of the value
     of the Fund's total assets in more than 3% of the total outstanding  voting
     securities of another  investment  company or more than 10% of the value of
     the Fund's total assets in securities issued by other investment companies;
12.  Participate  on a joint,  or a joint and several,  basis in any  securities
     trading account;
13.  Underwrite securities of other issuers;
14.  Make  loans to other  persons,  except up to 10% of the value of the Fund's
     total assets in loans of portfolio securities and except to the extent that
     the  purchase  of  publicly  traded  debt  securities  and the  entry  into
     repurchase  agreements in accordance with the Fund's  investment  objective
     and policies may be deemed to be loans;
15.  Mortgage,  pledge or hypothecate any portfolio  securities owned or held by
     the  Fund,  except  as  may  be  necessary  in  connection  with  permitted
     borrowing;
16.  Invest more than 5% of its total  assets in  warrants  to  purchase  common
     stock;

                                    -8-
<PAGE>

17.  Purchase  securities  of any issuer with a record of less than three years'
     continuous operation, including predecessors,  except obligations issued or
     guaranteed by the U.S. Government or its agencies or instrumentalities,  if
     such purchase  would cause the  investments of the Fund in all such issuers
     to exceed 5% of the value of the total assets of the Fund; or
18.  Purchase  or retain  any  securities  of an issuer  any of whose  officers,
     directors,  trustees  or  security  holders is an officer or Trustee of the
     Fund,  or is a member,  officer or  Director of the  Adviser,  if after the
     purchase of the  securities  of such issuer by the Fund one or more of such
     persons owns  beneficially more than 1/2 of 1% of the shares or securities,
     or both, all taken at market value, of such issuer, and such persons owning
     more than  of 1% of such shares or  securities  together own  beneficially
     more than 5% of such  shares or  securities,  or both,  all taken at market
     value.

BARON GROWTH & INCOME FUND and BARON SMALL CAP FUND may not:

1.   Issue senior  securities  or borrow money or utilize  leverage in excess of
     25% of its net assets (plus 5% for emergency or other short-term  purposes)
     from banks from time to time.
2.   Except as  described  in the  prospectus  or SAI,  engage  in  short-sales,
     purchase securities on margin or maintain a net short position.
3.   Purchase or sell  commodities  or  commodity  contracts  except for hedging
     purposes and in conformity  with  regulations  of the  Commodities  Futures
     Trading  Commission  such that the Fund would not be considered a commodity
     pool.
4.   Purchase  or sell oil and gas  interests  or real  estate.  Debt or  equity
     securities  issued by  companies  engaged  in the oil,  gas or real  estate
     business  are  not  considered  oil or gas  interests  or real  estate  for
     purposes  of this  restriction.  First  mortgage  loans  and  other  direct
     obligations  secured by real  estate  are not  considered  real  estate for
     purposes of this restriction.
5.   Invest more than 25% of the value of its total assets in any one  industry,
     except investments in U.S. government securities.
6.   Purchase the securities of any one issuer other than the U.S. government or
     any of  its  agencies  or  instrumentalities,  if  immediately  after  such
     purchase  more than 5% of the value of the  Fund's  total  assets  would be
     invested  in such  issuer  or the  Fund  would  own  more  than  10% of the
     outstanding voting securities of such issuer,  except that up to 25% of the
     value of the Fund's total assets may be invested  without  regard to the 5%
     and 10% limitations.
7.   Underwrite securities of other issuers.
8.   Make loans,  except to the extent the purchase of debt  obligations  of any
     type (including  repurchase  agreements and corporate commercial paper) are
     considered loans and except that the Fund may lend portfolio  securities to
     qualified   institutional   investors  in  compliance   with   requirements
     established from time to time by the Securities and Exchange Commission and
     the securities exchanges where such securities are traded.
9.   Participate  on a joint,  or a joint and several,  basis in any  securities
     trading account.
10.  Mortgage,  pledge  or  hypothecate  any of  its  assets,  except  as may be
     necessary in connection  with options,  loans of portfolio  securities,  or
     other permitted borrowings.
11.  Purchase  securities  of any issuer with a record of less than three years'
     continuous operations, including predecessors, except obligations issued or
     guaranteed by the U.S. government or its agencies or instrumentalities,  if
     such purchase  would cause the  investments of the Fund in all such issuers
     to exceed 5% of the value of the total assets of the Fund.
12.  Invest more than 15% of its assets in  restricted  or illiquid  securities,
     including

                                    -9-
<PAGE>

     repurchase agreements maturing in more than seven days. 

As a non-fundamental policy, BARON GROWTH & INCOME FUND and BARON SMALL CAP FUND
will not:

1.   Invest in securities of other registered  investment  companies  (except in
     connection with a merger,  consolidation or other reorganization and except
     for the  purchase of shares of  registered  open-end  money market funds if
     double advisory fees are not assessed), invest more than 5% of the value of
     the Fund's  total  assets in more than 3% of the total  outstanding  voting
     securities of another  investment  company or more than 10% of the value of
     the Fund's total assets in securities issued by other investment companies.
2.   Invest more than 5% of its total  assets in  warrants  to  purchase  common
     stock.
3.   Purchase the  securities  of any issuer of which any officer or director of
     the  Fund  owns 1/2 of 1% of the  outstanding  securities  or in which  the
     officers and directors in the aggregate own more than 5%.

The Securities  and Exchange  Commission  currently  requires that the following
conditions be met whenever  portfolio  securities are loaned:  (1) the Fund must
receive at least 100% cash collateral  from the borrower;  (2) the borrower must
increase such collateral whenever the market value of the securities rises above
the level of such collateral; (3) the Fund must be able to terminate the loan at
any time; (4) the Fund must receive reasonable  interest on the loan, as well as
any dividends, interest or other distributions on the loaned securities, and any
increase in market value; (5) the Fund may pay only reasonable custodian fees in
connection  with the loan; and (6) while voting rights on the loaned  securities
may pass to the borrower, the Fund's trustees must terminate the loan and regain
the right to vote the  securities if a material  event  adversely  affecting the
investment occurs. These conditions may be subject to future modifications.  The
portfolios of the Funds are valued every day the New York Stock Exchange is open
for trading.

With respect to investments in warrants,  the Funds will not invest in excess of
2% of the value of the  particular  Fund's net assets in  warrants  that are not
listed on the New York or American  Stock  Exchanges.  Warrants are  essentially
options to purchase equity  securities at a specified price valid for a specific
period of time.  Their prices do not necessarily  move parallel to the prices of
the underlying securities.  Warrants have no voting rights, receive no dividends
and have no rights with respect to the assets of the issuer.

TURNOVER RATE
- -------------

The adviser  expects that the average annual  turnover rate of the portfolios of
BARON  ASSET FUND and Baron  Growth & Income  Fund  should not exceed 50% and of
Baron Small Cap Fund should not exceed 100%.  For the year ended  September  30,
1998,  Baron Asset  Fund's  portfolio  turnover  was 23%,  Baron Growth & Income
Fund's portfolio turnover was 40%, and Baron Small Cap Fund's portfolio turnover
was 59%. For the year ended  September  30, 1997,  BARON ASSET FUND's  portfolio
turnover  was 13% and Baron Growth & Income  Fund's was 25%.  The turnover  rate
fluctuates depending on market conditions.

MANAGEMENT OF THE FUNDS
- -----------------------

BOARD OF TRUSTEES AND OFFICERS
- ------------------------------

The Board of Trustees  oversees the  management  of the Funds.  The Trustees and
executive officers of the Funds and their principal  occupations during the last
five years are set forth below.

                                    -10-
<PAGE>
<TABLE>
<CAPTION>
                              Position Held                    Principal Occupation(s)
Name, Address & Age           With the Fund                    During Past Five Years
- --------------------          -------------                    ---------------------------------------
<S>                           <C>                              <C>

Ronald Baron *+   55          President, Chief Investment      President and Director of: Baron
767 Fifth Avenue              Officer and Trustee              Capital, Inc. (1982-Present), Baron
New York, NY 10153                                             Capital Management, Inc.(1983-Present) Baron Capital
                                                               Group, Inc. (1984-Present), BAMCO, Inc. (1987-Present). 

Norman S. Edelcup @ 63        Trustee                          Chairman, Item Processing of
244 Atlantic Isle                                              America (1989-Present), (financial
N. Miami Beach, FL 33160                                       institution service bureau); Director, Valhi Inc. (1975-Present)
                                                               (diversified company); Director, Artistic Greetings,
                                                               Inc. (1985-Present).

Mark M. Feldman    47         Trustee                          President and Chief Executive Officer,
444 Madison Avenue, Ste 703                                    Cold Spring Group, Inc. (1993-Present) 
New York, NY 10020                                             (reorganization and restructuring consulting); various restructuring
                                                               and corporate development engagements(1995-Present) (case 
                                                               and litigation management); Director, SNL Securities,
                                                               Inc. (1997-Present) (publisher of data bases and manager of a bank
                                                               and thrift stock portfolio); Trustee, Aerospace Creditors 
                                                               Liquidating Trust (1993-1997)(administered and liquidated assets). 

Irwin Greenberg @   67        Trustee                          Chairman (1994-1997) and Director
4303 W. Wyndemere Circle                                       (1991-Present), Lehigh Valley  Hospital
Schnecksville, PA 18078                                        Board; Retail Consultant, 1990-Present); (Director, Cedar Crest 
                                                               College (1990-Present); Director, Henry Lehr & Co., Inc.
                                                               (1996-Present) (insurance); President and Chief Executive Officer,
                                                               Hess's Department Stores (1976-1990). 
                    
Clifford Greenberg  39        Vice President                   Vice President, Baron Capital, Inc., 
767 Fifth Avenue                                               Baron Capital Group, Inc., BAMCO, Inc.
New York, NY 10153                                             (1997-Present); General Partner, HPB Associates, L.P. (1984-1996) 
                                                               (investment partnership).

Linda S. Martinson*+  43      Secretary,                       General Counsel and Secretary of:
767 Fifth Avenue              Vice President                   Baron Capital, Inc. (1983-Present),
New York, NY 10153            and Trustee                      BAMCO, Inc. (1987-Present), Baron Capital Group, Inc. (1984-Present),
                                                               Baron Capital Management, Inc. (1983-Present).
</TABLE>

                                    -11-
<PAGE>
<TABLE>
<CAPTION>
                              Position Held                    Principal Occupation(s)
Name,  Address & Age          With the Fund                    During Past Five Years
- --------------------          -------------                    -----------------------------------------
<S>                           <C>                              <C>
Charles N. Mathewson   70     Trustee                          Chairman of the Board, International
9295 Prototype Road                                            Game Technology (1986-Present)
Reno, NV 89511                                                 (manufacturer of microprocessor-controlled gaming machines and
                                                               monitoring systems).

Harold W. Milner       64     Trustee                          Retired; President and Chief Executive
2293 Morningstar Drive                                         Officer, Kahler Realty Corporation
Park City, UT 84060                                            (1985-1997) (hotel ownership and management).

Raymond Noveck+        55     Trustee                          President, The Medical Information
31 Karen Road                                                  Line, Inc. (1997-Present) (health care
Waban, MA 02168                                                information); President, Strategic information); Director, Horizon
                                                               /CMS Healthcare Corporation (1987-1997).

Susan Robbins          44     Vice President                   Senior Analyst, Vice President and
767 Fifth Avenue                                               Director of: Baron Capital, Inc. (1982-
New York, NY 10153                                             Present), Baron Capital Management, Inc.(1984-Present).

Morty Schaja*          44     Senior Vice                      Senior Vice President and Chief
767 Fifth Avenue              President, Chief                 Operating Officer of Baron Capital, Inc.
New York, NY 10153            Operating Officer and Trustee    (1997-Present), Managing Director, Vice President, Baron Capital, 
                                                               Inc. (1991-Present) and Director, Baron Capital
                                                               Group, Inc., Baron Capital Management, Inc., and BAMCO, Inc.
                                                               (1997-Present).

David A.Silverman, M.D. 48    Trustee                          Physician and Faculty, New York University
239 Central Park West                                          School of Medicine (1976-Present).
New York, NY 10024

Peggy Wong            38      Treasurer and                    Treasurer and Chief Financial Officer
767 Fifth Avenue              Chief Financial Officer          of: Baron Capital, Inc., Baron Capital
New York, NY 10153                                             Group, Inc., BAMCO, Inc., Baron Capital
                                                               Management, Inc.(1987-Present).
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE>

*    Trustees  deemed  to be  "interested  persons"  of the Fund as that term is
     defined in the Investment Company Act of 1940.

+    Members of the Executive  Committee,  which is empowered to exercise all of
     the powers,  including the power to declare dividends, of the full Board of
     Trustees when the full Board of Trustees is not in session.

@     Members of the Audit Committee.

                                    -12-
<PAGE>

The Trustees of the Funds'  received the following  compensation  from the Funds
for the fiscal year ended September 30, 1998:

<TABLE>
<CAPTION>
                          Aggregate Compensation            Total Compensation
Name                      From the Funds                    From the Funds Paid to Trustees
- -----------------         ----------------------            -------------------------------
<S>                       <C>                               <C>
Ronald Baron              $0                                $0
Norman Edelcup            $13,000                           $13,000
Neil Elliott              $ 1,125                           $ 1,125
Linda S. Martinson        $0                                $0
Charles Mathewson         $ 4,000                           $ 4,000
Mark Feldman              $12,500                           $12,500
Irwin Greenberg           $15,000                           $15,000
Harold Milner             $12,500                           $12,500
Raymond Noveck            $12,500                           $12,500
Morty Schaja              $0                                $0
David Silverman           $12,500                           $12,500
Daniel Tisch              $12,500                           $12,500

TOTALS                    $95,625                           $95,625
</TABLE>

PRINCIPAL HOLDERS OF SHARES
- ---------------------------

As of December 31, 1998, the following persons were known to the Funds to be the
record or beneficial owners of more than 5% of the outstanding securities of the
Funds:

<TABLE>
<CAPTION>
                                    Baron Asset       Baron Growth        Baron Small
                                    Fund              & Income Fund       Cap Fund   
                                    -----------       -------------       -----------
<S>                                 <C>               <C>                 <C>
Charles Schwab & Co., Inc.          42.6%             39.2%               42.4%
National Financial Services Corp.   13.7%             16.4%               26.4%
Donaldson, Lufkin & Jenrette         5.0%              0.0%                5.3%
</TABLE>

All  of  the  above  record  owners  are  brokerage  firms  or  other  Financial
Institutions that hold stock for the benefit of their respective  customers.  As
of December 31, 1998,  all of the officers and Trustees of BARON ASSET FUND as a
group  beneficially  owned  directly or  indirectly  0.19% of BARON ASSET FUND's
outstanding  shares 0.55% of BARON GROWTH & INCOME FUND's outstanding shares and
0.57% of BARON SMALL CAP FUND's outstanding shares.

INVESTMENT ADVISER
- ------------------

The investment  adviser to the Funds is BAMCO, Inc. (the "Adviser"),  a New York
corporation with its principal offices at 767 Fifth Avenue, New York, N.Y. 10153
and a subsidiary of Baron Capital Group, Inc.  ("BCG").  Mr. Ronald Baron is the
controlling  stockholder  of BCG and is BAMCO's chief  investment  officer.  Mr.
Baron has over 28 years of experience  as a Wall Street  analyst and has managed
money  for  others  for over 23 years.  He has been a  participant  in  Barron's
Roundtable  and has been a featured guest on Wall Street Week, CNN and CNBC/FNN.
Pursuant  to  separate  Advisory   Agreements  with  each  Fund  (the  "Advisory
Agreement"),  the Adviser furnishes continuous  investment advisory services and
management to each Fund,  including making the day-to-day  investment  decisions
and arranging  portfolio  transactions for the Funds subject to such policies as
the Trustees  may  determine.  BARON

                                    -13-
<PAGE>

ASSET  FUND  incurred  advisory  expenses  of  $45,074,474  for the  year  ended
September  30, 1998;  $18,573,064  for the year ended  September  30, 1997;  and
$6,923,899  for the year ended  September  30, 1996.  BARON GROWTH & INCOME FUND
incurred  advisory expenses of $4,310,057 for the year ended September 30, 1998;
$2,828,391  for the year ended  September  30,  1997;  and $994,621 for the year
ended  September 30, 1996.  BARON SMALL CAP FUND incurred  advisory  expenses of
$4,041,420 for the year ended September 30, 1998, its first year of operation.

Under the  Advisory  Agreements,  the  Adviser,  at its own  expense and without
reimbursement  from the Funds,  furnishes  office space and all necessary office
facilities,  equipment and executive  personnel for managing the Funds, and pays
the salaries and fees of all officers and Trustees who are interested persons of
the Adviser.

The Funds pay all operating and other  expenses not borne by the Adviser such as
audit,  accounting and legal fees;  custodian fees;  expenses of registering and
qualifying its shares with federal and state securities commissions; expenses in
preparing  shareholder  reports  and  proxy  solicitation  materials;   expenses
associated with each Fund's shares such as dividend  disbursing,  transfer agent
and registrar fees; certain insurance expenses; compensation of Trustees who are
not  interested  persons  of  the  Adviser;  and  other  miscellaneous  business
expenses.  The  Funds  also pay the  expenses  of  offering  the  shares of each
respective  Fund,   including  the  registration  and  filing  fees,  legal  and
accounting fees and costs of printing the prospectus and related documents. Each
Fund  also  pays all  taxes  imposed  on it and all  brokerage  commissions  and
expenses incurred in connection with its portfolio transactions.

The  Adviser  utilizes  the  staffs  of BCG and  its  subsidiary  Baron  Capital
Management, Inc. ("BCM") to provide research.  Directors,  officers or employees
of the Adviser  and/or its  affiliates may also serve as officers or Trustees of
the  Funds.  BCM  is an  investment  adviser  to  institutional  and  individual
accounts. Clients of BCM have investment objectives which may vary only slightly
from those of each other and of the Funds.  BCM invests  assets in such clients'
accounts  and in the  accounts  of  principals  and  employees  of BCM  and  its
affiliates in investments  substantially similar to, or the same as, those which
constitute the principal  investments of the Funds. When the same securities are
purchased for or sold by a Fund and any of such other accounts, it is the policy
of the  Adviser  and  BCM to  allocate  such  transactions  in a  manner  deemed
equitable by the Adviser,  and for the  principals and employees of the Adviser,
BCM, and affiliates to take either the same or least favorable price of the day.
All trading by  employees  is subject to the Code of Ethics of the Funds and the
Adviser. In certain circumstances the Adviser may make investments for the Funds
that  conflict  with  investments  being made by BCM.  The Adviser may also make
investment  decisions  for a Fund  that are  inconsistent  with  the  investment
decisions for another Fund.

Each  Advisory  Agreement  provides that the Fund may use "Baron" as part of its
name for so long as the Adviser serves as investment  adviser to that Fund. Each
Fund  acknowledges that the word "Baron" in its name is derived from the name of
the entities  controlling,  directly and indirectly,  the Adviser,  which derive
their name from Ronald Baron;  that such name is the property of the Adviser and
its affiliated  companies for copyright  and/or other purposes;  and that if for
any reason the Adviser ceases to be that Fund's  investment  adviser,  that Fund
will promptly  take all steps  necessary to change its name to one that does not
include "Baron," absent the Adviser's written consent.

Each  Advisory  Agreement  provides  that the Adviser shall have no liability to
that Fund or its shareholders for any error of judgment or mistake of law or for
any loss  suffered  by that  Fund;  provided,  that  the  Adviser  shall  not be
protected  against  liabilities  arising by virtue of willful  misfeasance,  bad
faith or gross negligence,  or reckless  disregard of the Adviser's  obligations
under the Advisory Agreement.

                                    -14-
<PAGE>

The Advisory Agreements were approved by a majority of the Trustees, including a
majority of the  Trustees who are not  "interested  persons" ( as defined by the
Investment  Company  Act of 1940  ("1940 Act" )) for BARON ASSET FUND on May 11,
1987, for BARON GROWTH & INCOME FUND on October 21, 1994 and for BARON SMALL CAP
FUND on July 29,  1997.  BARON  SMALL CAP FUND's  Advisory  Agreement  is for an
initial two year period but the Advisory  Agreements  must  normally be approved
annually by the Trustees or a majority of the particular  Fund's shares and by a
majority  of the  Trustees  who are not  parties to the  Advisory  Agreement  or
interested persons of any such party. With respect to BARON ASSET FUND and BARON
GROWTH & INCOME FUND, such approval for 1998 was approved at a Board of Trustees
meeting held on April 28, 1998.

Each Advisory  Agreement is terminable  without penalty by either the Fund (when
authorized by majority vote of either its outstanding shares or the Trustees) or
the  Adviser  on  60  days'  written  notice.   Each  Advisory  Agreement  shall
automatically  terminate  in the event of its  "assignment"  (as defined by 1940
Act).

SERVICE AGREEMENTS
- ------------------

The Funds have  agreements  with  various  service  providers  pursuant to which
administrative  services  such  as  record  keeping,  reporting  and  processing
services are provided to the Funds.

DISTRIBUTOR
- -----------

The Funds have a  distribution  agreement  with  Baron  Capital,  Inc.,  ("Baron
Capital" or the  "Distributor")  a New York corporation and a subsidiary of BCG,
located at 767 Fifth Avenue,  New York, N.Y. 10153.  Baron Capital is affiliated
with the  Adviser.  The  Distributor  acts as the  agent  for the  Funds for the
continuous public offering of their shares on a best efforts basis pursuant to a
distribution  plan  adopted  under Rule 12b-1 under the 1940 Act  ("Distribution
Plan").

DISTRIBUTION PLAN
- -----------------

The Distribution Plan authorizes the Funds to pay the Distributor a distribution
fee equal on an annual  basis to 0.25% of the Funds'  average  daily net assets.
The fee was reduced to 0.25% from 0.50% on July 12, 1993. The  distribution  fee
is paid to the  Distributor  in  connection  with  its  activities  or  expenses
primarily intended to result in the sale of shares,  including,  but not limited
to,  compensation  to  registered  representatives  or  other  employees  of the
Distributor;  compensation  to and expenses of employees of the  Distributor who
engage in or  support  the  distribution  of shares or who  service  shareholder
accounts; telephone expenses;  preparing,  printing and distributing promotional
and advertising  material;  preparing,  printing and distributing the Prospectus
and  reports  to other  than  current  shareholders;  compensation  for  certain
shareholder services;  and commissions and other fees to broker-dealers or other
persons  (excluding  banks)  who have  introduced  investors  to the  Fund.  The
distribution fee is payable to the Distributor regardless of the actual expenses
incurred,  although  the  actual  expenses  incurred  by  the  Distributor  have
historically exceeded the distribution fees received by the Distributor.

If and to the extent the expenses  listed below are  considered  to be primarily
intended to result in the sale of shares within the meaning of Rule 12b-1,  they
are not included in the limits above:  (a) the costs of  preparing,  printing or
reproducing and mailing all required  reports and notices to  shareholders;  (b)
the costs of preparing, printing or reproducing and mailing all proxy statements
and proxies (whether or not such proxy materials include any item relating to or
directed  toward the sale of shares);  (c) the costs of  preparing,  printing or
reproducing   and  mailing  all   prospectuses   and  statements  of  additional
information;  (d) all legal and accounting  fees relating to the  preparation of
any such  report,

                                    -15-
<PAGE>

prospectus,  and proxy  materials;  (e) all fees and  expenses  relating  to the
qualification  of the Funds and/or their  shares under the  securities  or "Blue
Sky"  laws  of any  jurisdiction;  (f)  all  fees  under  the  1940  Act and the
Securities Act of 1933,  including fees in connection  with any  application for
exemption  relating to or directed  toward the sale of Shares;  (g) all fees and
assessments,  if any,  of the  Investment  Company  Institute  or any  successor
organization,  whether or not its  activities  are  designed  to  provide  sales
assistance;  (h) all costs of preparing and mailing confirmations of shares sold
or  redeemed  and  reports of share  balances;  (i) all costs of  responding  to
telephone or mail inquiries of shareholders or prospective shareholders.

The Distribution Plan requires that while it is in effect the Distributor report
in writing, at least quarterly, the amounts of all expenditures, the identity of
the  payees  and the  purposes  for which  such  expenditures  were made for the
preceding fiscal quarter.

For the fiscal year ended September 30, 1998, BARON ASSET FUND paid distribution
fees to the Distributor of $11,268,627 (an additional $1,307,832 was absorbed by
the  Distributor  and/or its affiliates and not paid by the Fund pursuant to the
0.25%  limitation);  BARON  GROWTH & INCOME FUND paid  distribution  fees to the
Distributor of $1,077,515 (an additional $71,246 was absorbed by the Distributor
and/or  its  affiliates  and  not  paid  by  the  Fund  pursuant  to  the  0.25%
limitation);  and BARON SMALL CAP FUND paid distribution fees to the Distributor
of $1,010,356 (an additional $318,263 was absorbed by the Distributor and/or its
affiliates  and not paid by the Fund  pursuant  to the  0.25%  limitation).  The
distribution  expenses  incurred  by the  Distributor  for the fiscal year ended
September  30,  1998 with  respect to the three Funds in the  aggregate  were as
follows:


      (a)  Advertising                                      $         4,900

      (b)  printing and mailing of prospectuses                   2,144,840
           to other than current shareholders

      (c)  Compensation paid or to be paid to                    10,713,599
           broker/dealers

      (d)  Compensation paid to sales and clerical personnel      1,388,560

      (e)  Other                                                    801,940

Trustees of the Funds who were not interested persons of the Funds had no direct
or indirect  financial interest in the operation of the Distribution Plan or the
Distribution Agreement. All the interested Trustees had such an interest.

The  Distribution  Plan has  been  approved  by the  Funds'  Board of  Trustees,
including a majority of the Trustees who are not interested persons of the Funds
and who have no direct or indirect  financial  interest in the  operation of the
Distribution  Plan  or in any  agreements  related  thereto.  In  approving  the
Distribution  Plan, the Trustees  considered various factors and determined that
there is a reasonable  likelihood that the Plan will benefit the Funds and their
shareholders.  The  anticipated  benefits  include  the  following:  (i) reduced
expense  ratios due to economies of scale,  (ii) the ability to purchase  larger
blocks  of  securities,   resulting  in  decreased   expenses,   and  (iii)  the
minimization  of adverse  effects from forced sales of portfolio  securities  to
meet redemptions.

Baron Capital is authorized  to make payments to authorized  dealers,  banks and
other  financial  institutions  who have rendered  distribution  assistance  and
ongoing shareholder support services, shareholder servicing assistance or record
keeping.  Certain  states may require  that any such person be

                                    -16-
<PAGE>

registered  as a dealer  with  such  state.  The  Funds  may  execute  portfolio
transactions with and purchase securities issued by depository institutions that
receive payments under the Distribution Plan. No preference will be shown in the
selection of investments for the  instruments of such  depository  institutions.
Baron Capital may also retain part of the  distribution  fee as compensation for
its services and expenses in connection with the  distribution of shares.  Baron
Capital's actual expenditures have and will continue to substantially exceed the
distribution  fee received by it. If the  Distribution  Plan is terminated,  the
Funds  will owe no  payments  to Baron  Capital  other  than any  portion of the
distribution  fee accrued  through the effective  date of  termination  but then
unpaid.

Unless  terminated in accordance  with its terms,  the  Distribution  Plan shall
continue in effect until,  and from year to year thereafter if, such continuance
is specifically  approved at least annually by its Trustees and by a majority of
the Trustees who are not  interested  persons of the Fund and who have no direct
or indirect  financial  interest in the operation of the Distribution Plan or in
any agreements  related  thereto,  such votes cast in person at a meeting called
for the purpose of such vote.

The Distribution Plan may be terminated at any time by the vote of a majority of
the members of the Funds'  Board of Trustees who are not  interested  persons of
the Funds and have no direct or indirect  financial interest in the operation of
the Distribution  Plan or in any agreements  related thereto or by the vote of a
majority of the outstanding  shares. The Distribution Plan may not be amended to
increase  materially the amount of payments to be made without the approval of a
majority of the shareholders. All material amendments must be approved by a vote
of the Trustees and of the Trustees who are not interested  persons of the Funds
and have no  direct or  indirect  financial  interest  in the  operation  of the
Distribution  Plan or in any  agreements  related  thereto,  such  votes cast in
person at a meeting called for the purpose of such vote.

The Glass-Steagall  Act and other applicable laws, among other things,  prohibit
banks from  engaging  in  business  of  underwriting,  selling  or  distributing
securities.  Accordingly,  the Distributor will enter into agreements with banks
only to provide administrative assistance.  However, changes in federal or state
statues and regulations  pertaining to the  permissible  activities of banks and
their  affiliates,   as  well  as  judicial  or   administrative   decisions  or
interpretations could prevent a bank from continuing to perform all or a part of
the  contemplated  services.  If a bank  were  prohibited  from so  acting,  the
Trustees would consider what actions,  if any, would be necessary to continue to
provide efficient and effective  shareholder  services.  It is not expected that
shareholders  would  suffer any adverse  financial  consequences  as a result of
these occurrences.

BROKERAGE
- ---------

The Adviser is responsible for placing the portfolio  brokerage  business of the
Funds with the objective of obtaining the best net results for the Funds, taking
into account  prompt,  efficient and reliable  executions at a favorable  price.
Brokerage transactions for the Funds in exchange-listed  securities are effected
chiefly by or through the Adviser's  affiliate,  Baron Capital,  when consistent
with this objective and subject to the  conditions  and  limitations of the 1940
Act.  Baron  Capital  is a member  of the  National  Association  of  Securities
Dealers,  Inc., but is not a member of any securities exchange.  Transactions in
securities  that trade on NASDAQ or are  otherwise  not listed are  effected  by
broker/dealers  other  than  Baron  Capital.  The Funds do not deal  with  Baron
Capital in any portfolio transaction in which Baron Capital acts as principal.

The Funds'  Board of Trustees has adopted  procedures  pursuant to Rule 17e-1 of
the 1940 Act which are reasonably  designed to provide that the commissions paid
to Baron  Capital are  reasonable  and fair compared to the  commission,  fee or
other  enumeration  received  by other  brokers in  connection  with  comparable
transactions   involving  similar  securities  being  purchased  or  sold  on  a
securities

                                    -17-
<PAGE>

exchange  during  a  comparable  period  of  time.  The  Board  reviews  no less
frequently than quarterly that all transactions  effected pursuant to Rule 17e-1
during the preceding  quarter were effected in compliance with such  procedures.
The Funds and the Adviser  furnish  such  reports and  maintain  such records as
required by Rule 17e-1.

For the fiscal year ended September 30, 1998, of the total $ 8,178,614 brokerage
commissions  paid by the Funds, $ 5,435,764 were paid to Baron Capital.  For the
fiscal  year  ended  September  30,  1997,  of the  total  $3,307,779  brokerage
commissions paid by BARON ASSET FUND and BARON GROWTH & INCOME FUND,  $2,575,700
brokerage  commissions  were paid to Baron  Capital.  For the fiscal  year ended
September 30, 1996, of the total $1,576,882 brokerage  commissions paid by BARON
ASSET FUND and BARON GROWTH & INCOME FUND, $1,383,564 brokerage commissions were
paid to Baron Capital. The brokerage commissions paid to Baron Capital represent
66.5% of the aggregate dollar amount of brokerage  commissions paid and 59.1% of
the aggregate dollar amount of transactions involving the payment of commissions
for the 1998  fiscal  year.  The  brokerage  commissions  paid to Baron  Capital
represent 77.9% of the aggregate dollar amount of brokerage commissions paid and
76.4% of the aggregate  dollar amount of  transactions  involving the payment of
commissions  for the 1997 fiscal year. The brokerage  commissions  paid to Baron
Capital represent 87.7% of the aggregate dollar amount of brokerage  commissions
paid and 58.4% of the  aggregate  dollar  amount of  transactions  involving the
payment of  commissions  for the 1996  fiscal  year.  For the fiscal  year ended
September  30, 1995, of the total  $369,753  brokerage  commissions  paid by the
Funds,  $341,336  in  brokerage  commissions  were  paid to Baron  Capital.  The
brokerage  commissions  paid to Baron Capital  represent  92.3% of the aggregate
dollar amount of brokerage  commissions  paid and 89.0% of the aggregate  dollar
amount of transactions  involving the payment of commissions for the 1995 fiscal
year.  Transactions in which Baron Capital acted as broker represents 39% of the
aggregate  dollar amount of all principal and agency  transactions for the Funds
for the 1998 fiscal year.

Under the  Investment  Advisory  Agreements and as permitted by Section 28(e) of
the  Securities and Exchange Act of 1934, the Adviser may cause the Funds to pay
a  broker-dealer  (except Baron Capital)  which provides  brokerage and research
services  to the Adviser an amount of  commission  for  effecting  a  securities
transaction  for the Funds in excess of the amount  other  broker-dealers  would
have charged for the  transaction  if the Adviser  determines in good faith that
the greater  commission is consistent with the Funds' policies and is reasonable
in relation to the value of the brokerage and research  services provided by the
executing  broker-dealer  viewed in terms of either a particular  transaction or
the Adviser's overall responsibilities to the Funds or to its other clients. The
term  "brokerage  and  research  services"  includes  advice  as to the value of
securities, the advisability of investing in, purchasing, or selling securities,
and the  availability  of securities or of purchasers or sellers of  securities;
furnishing  analyses and reports  concerning  issuers,  industries,  securities,
economic factors and trends, portfolio strategy and the performance of accounts;
and  effecting  securities  transactions  and  performing  functions  incidental
thereto such as clearance and  settlement.  Such research and information may be
used by the Adviser or its  affiliates to supplement the services it is required
to perform pursuant to the Advisory  Agreement in serving the Funds and/or other
advisory clients of affiliates.

Broker-dealers may be willing to furnish statistical  research and other factual
information or services to the Adviser for no consideration other than brokerage
or  underwriting  commissions.  Securities  may be bought or sold  through  such
broker-dealers,  but at  present,  unless  otherwise  directed  by the Funds,  a
commission  higher  than one charged  elsewhere  will not be paid to such a firm
solely because it provided research to the Adviser. Research provided by brokers
is used for the benefit of all of the Adviser's or its  affiliates'  clients and
not solely or necessarily for the benefit of the Funds. The Adviser's investment
management  personnel  attempt to evaluate  the quality of research  provided by
brokers.  Results  of  this  effort  are  sometimes  used  by the  Adviser  as a
consideration the in the selection of brokers to execute portfolio transactions.

                                    -18-
<PAGE>

Baron Capital acts as broker for, in addition to the Funds,  accounts of BCM and
Baron Capital,  including accounts of principals and employees of Baron Capital,
BCM and the Adviser.  Investment decisions for the Funds for investment accounts
managed by BCM and for accounts of Baron  Capital are made  independent  of each
other in light of differing  considerations  for the various accounts.  The same
investment  decision  may,  however,  be made for two or more of the  Adviser's,
BCM's and/or Baron Capital's accounts. In such event,  simultaneous transactions
are inevitable.  Purchases and sales are averaged as to price where possible and
allocated to account in a manner deemed  equitable by the Adviser in conjunction
with BCM and Baron Capital.  This procedure could have a detrimental effect upon
the price or value of the  security  for the  Funds,  but may have a  beneficial
effect.

The investment  advisory fee that the Funds pay to the Adviser is not reduced as
a consequence of the Adviser's  receipt of brokerage and research  services.  To
the extent the Funds'  portfolio  transactions are used to obtain such services,
the  brokerage  commissions  paid by the Funds  will  exceed  those  that  might
otherwise  be paid by an  amount  that  cannot  be  presently  determined.  Such
services  would by useful and of value to the Adviser in serving  both the Funds
and other clients and,  conversely,  such services  obtained by the placement of
brokerage  business of other  clients would by useful to the Adviser in carrying
out its obligations to the Funds.

CUSTODIAN,  TRANSFER  AGENT  AND DIVIDEND  AGENT
- ------------------------------------------------

The Bank of New York,  48 Wall Street,  New York,  NY, is the  custodian for the
Funds' cash and  securities.  DST Systems,  Inc.,  CT-7 Tower,  1004  Baltimore,
Kansas City, MO 64105,  is the transfer  agent and dividend agent for the Funds'
shares.  Neither  institution  assists  in  or  is  responsible  for  investment
decisions involving assets of the Funds.

REDEMPTION OF SHARES
- --------------------

The Funds expect to make all redemptions in cash, but have reserved the right to
make payment, in whole or in part, in portfolio securities. Payment will be made
other than all in cash if the Funds' Board of Trustees  determines that economic
conditions  exist  which  would make  payment  wholly in cash  detrimental  to a
particular fund's best interests.  Portfolio securities to be so distributed, if
any,  would be selected in the  discretion  of the Funds'  Board of Trustees and
priced as  described  under  "Determining  Your Share  Price"  herein and in the
Prospectus.

NET  ASSET VALUE
- ----------------

As more fully set forth in the Prospectus under  "Determining Your Share Price,"
the net asset value per share of each Fund is  determined as of the close of the
New York Stock  Exchange on each day that the Exchange is open.  The Exchange is
open all week days that are not holidays,  which it announces annually. The most
recent  announcement states it will not be open on New Year's Day, Martin Luther
King, Jr.'s Day, Washington's Birthday,  Good Friday, Memorial Day, Independence
Day, Labor Day, Thanksgiving and Christmas.

Securities  traded on more than one national  securities  exchange are valued at
the last sale  price of the day as of which such  value is being  determined  as
reflected at the close of the exchange  which is the  principal  market for such
securities.

U.S. Government obligations and other debt instruments having sixty days or less
remaining until maturity are stated at amortized cost. Debt instruments having a
greater  remaining  maturity  will be valued at the  highest  bid price from the
dealer  maintaining  an active market in that security or on the basis of prices
obtained from a pricing service approved by the Board of Trustees.

                                    -19-
<PAGE>

TAXES
- -----

Each Fund  intends to qualify  every year as a  "regulated  investment  company"
under  Subchapter  M  of  the  Internal  Revenue  Code  of  1986  (the  "Code").
Qualification  as a regulated  investment  company relieves the Funds of Federal
income  taxes on the  portion of their net  investment  income and net  realized
capital  gains  distributed  to  shareholders.  The Funds  intend to  distribute
virtually all of their net investment  income and net realized  capital gains at
least annually to their respective shareholders.

A  non-deductible  4% excise tax will be imposed on a Fund to the extent that it
does not distribute  (including  declaration of certain dividends),  during each
calendar year, (i) 98% of its ordinary  income for such calendar year,  (ii) 98%
of its capital  gain net income (the excess of short and long term  capital gain
over short and long term capital loss) for each one-year  period ending  October
31  and  (iii)  certain  other  amounts  not   distributed  in  previous  years.
Shareholders  will be taxed during each calendar year on the full amount of such
dividends  distributed  (including  certain declared dividends not actually paid
until the next calendar year).

For Federal income tax purposes,  distributions  paid from net investment income
and from any net realized  short-term  capital gains are taxable to shareholders
as  ordinary  income,   whether  received  in  cash  or  in  additional  shares.
Distributions  paid from net  capital  gains are  taxable as  long-term  capital
gains,  whether  received  in  cash  or  shares  and  regardless  of how  long a
shareholder has held the shares, and are not eligible for the dividends received
deduction.   Distributions  of  investment  income  (but  not  distributions  of
short-term or long-term capital gains) received by shareholders will qualify for
the 70% dividends  received  deduction  available to  corporations to the extent
designated by the Fund in a notice to each  shareholder.  Unless all of a Fund's
gross income constitutes dividends from domestic corporations qualifying for the
dividends  received  deduction,  a portion of the  distributions  of  investment
income to those holders of that Fund which are corporations will not qualify for
the 70%  dividends  received  deduction.  The dividends  received  deduction for
corporate  holders may be further  reduced if the shares  with  respect to which
dividends are received are treated as  debt-financed or deemed to have been held
for less than forty-six (46) days.

The Funds will send written notices to shareholders regarding the Federal income
tax status of all  distributions  made  during  each  calendar  year as ordinary
income or capital gain and the amount qualifying for the 70% dividends  received
deduction.

The foregoing  relates to Federal  income  taxation.  Distributions  may also be
subject to state and local taxes.  The Funds are  organized  as a  Massachusetts
business trust.  Under current law, so long as the Funds qualify for the Federal
income tax  treatment  described  above,  it is  believed  that they will not be
liable for any income or franchise tax imposed by Massachusetts.

Investors are urged to consult their own tax advisers  regarding the application
of Federal, state and local tax laws.

ORGANIZATION AND CAPITALIZATION
- -------------------------------

GENERAL
- -------

BARON ASSET FUND is an open-end  investment  company  organized as a series fund
and  established  under  the  laws of The  Commonwealth  of  Massachusetts  by a
Declaration  of Trust dated  February  19,  1987,  as amended.  The three series
currently  available are BARON ASSET FUND, BARON GROWTH & INCOME FUND, and BARON
SMALL CAP FUND. Shares entitle their holders to one vote per share.  Shares have
non-cumulative  voting rights,  which means that holders of more than 50% of the
shares  voting for

                                    -20-
<PAGE>

the election of Trustees can elect all Trustees and, in such event,  the holders
of the remaining  shares voting for the election of Trustees will not be able to
elect  any  person  or  persons  as  Trustees.  Shares  have  no  preemptive  or
subscription rights, and are transferable.

SHAREHOLDER AND TRUSTEE LIABILITY
- ---------------------------------

Under  Massachusetts  law,  shareholders of a Massachusetts  business trust may,
under  certain  circumstances,  be held  personally  liable as partners  for the
obligations  of  the  trust.  The  Declaration  of  Trust  contains  an  express
disclaimer of  shareholder  liability for acts or obligations of the Fund or any
series  thereof.  Notice  of such  disclaimer  will  normally  be  given in each
agreement,  obligation  or  instrument  entered into or executed by the Funds or
Trustees.  The Declaration of Trust provides for  indemnification  by a Fund for
any loss  suffered by a  shareholder  as a result of an obligation of that Fund.
The Declaration of Trust also provides that a Fund shall,  upon request,  assume
the defense of any claim made against any  shareholder  for an act or obligation
of that Fund and satisfy any judgement thereon.  Thus, the risk of a shareholder
incurring  financial  loss on account  or  shareholder  liability  is limited to
circumstances in which the Fund itself would be unable to meets its obligations.
The Trustees believe that, in view of the above, the risk of personal  liability
of shareholders is remote.

The  Declaration of Trust further  provides that the Trustees will not be liable
for  errors  of  judgement  or  mistakes  of  fact or law,  but  nothing  in the
Declaration  of trust  protects a trustee  against  liability to which he or she
would otherwise be subject by reason of willful  misfeasance,  bad faith,  gross
negligence or reckless disregard of the duties involved in the conduct of his or
her office.

OTHER INFORMATION
- -----------------

INDEPENDENT ACCOUNTANTS
- -----------------------

PricewaterhouseCoopers  LLP,  1177 Avenue of the  Americas,  New York,  New York
10036, has been selected as independent accountants of the Funds.

CALCULATIONS OF PERFORMANCE DATA 
- ---------------------------------

Advertisements  and other  sales  literature  for the Funds may refer to average
annual total return and actual  return.  Average annual total return is computed
by finding the average  annual  compounded  rates of return over a given  period
that would equate a  hypothetical  initial  investment to the ending  redeemable
value thereof, as follows:

                         P(1+T)^ = ERV
Where:         P  = a hypothetical initial payment of $1,000
               T  = average annual total return
                ^ = number of years
              ERV = ending redeemable value at the end of the period of a
                    hypothetical $1,000 investment made at the beginning
                    of the period

Actual return is computed by measuring  the  percentage  change  between the net
asset value of a hypothetical  $1,000 investment in the Fund at the beginning of
a period and the net asset value of that investment at the end of a period.  The
performance data used in advertisements  does not give effect to a 2% contingent
deferred sales charge that is no longer applicable.

All  performance  calculations  assume  that  dividends  and  distributions  are
reinvested  at the net asset

                                    -21-
<PAGE>

value on the appropriate reinvestment dates and include all recurring fees.

Computed in the manner  described above, the performance of BARON ASSET FUND has
been:

<TABLE>
<CAPTION>
                                   AVERAGE ANNUAL TOTAL RETURN         ACTUAL RETURN*
                                   (PRIOR TO JANUARY 1, 1992
                                   INCLUDES THE 2% CONTINGENT
                                   DEFERRED SALES LOAD WHERE
                                   INVESTMENT IS LESS THAN 3 YEARS)
<S>                                <C>                                 <C>

Year ended 12/31/98                         + 4.3%                        +  4.3%

Inception(06/12/87) to 12/31/98             +17.7%                        +557.5%

Five Years Ended 12/31/98                   +19.9%                        +147.4%

Ten Years Ended 12/31/98                    +16.9%                        +375.0%
</TABLE>

*    Does not include the  2%contingent  deferred  sales load which applied only
     prior to 1/1/92.


For BARON GROWTH & INCOME FUND the Performance Has Been:

<TABLE>
<CAPTION>
                                   AVERAGE ANNUAL TOTAL RETURN        ACTUAL RETURN
<S>                                <C>                                <C>
Year Ended 12/31/98                       +  0.1%                       +    0.1%

Inception (01/03/95) to
Year Ended 12/31/98                        +26.4%                         +155.6%
</TABLE>


For BARON SMALL CAP FUND the Performance Has Been:

<TABLE>
<CAPTION>
                                   AVERAGE ANNUAL TOTAL RETURN        ACTUAL RETURN
<S>                                <C>                                <C>
Year Ended 12/31/98                      +  2.2%                         +   2.2%

Inception (10/01/97) to
Year Ended 12/31/98                      +  4.3%                         +   5.4%
</TABLE>

Performance   results   represent  past  performance  and  are  not  necessarily
representative  of future  results.  Investment  return and principal value will
fluctuate so that shares may be worth more or less than their original cost when
redeemed.

In addition to advertising  average  annual and actual return data,  comparative
performance  information  may be used in advertising  materials about the Funds,
including data and other information from Lipper Analytical Services,  Inc., CDA
Investment Technologies, Morningstar Inc., Money, Forbes, SEI, Ibbotson, No Load
Investor,  Growth Fund Guide,  Fortune,  Barron's,  The New York Times, The Wall
Street  Journal,  Changing Times,  Medical  Economics,  Business Week,  Consumer
Digest, Dick Davis Digest,  Dickenson's  Retirement Letter, Equity Fund Outlook,
Executive Wealth Advisor,  Financial World,  Investor's  Daily,  Time,  Personal
Finance, Investment Advisor, SmartMoney,  Rukeyser,  Kiplinger's, NAPFA News, US
News,  Bottomline,  Investors Business Daily,  Bloomberg Radio, CNBC, USA Today,
1998 Mutual  Fund  Report,  Mutual  Fund  Magazine,  The  Street.com,  Bloomberg
Personal,   Worth,  Washington  Business  Journal, 

                                    -22-
<PAGE>

Investment  News,  Hispanic  Magazine,  Institutional  Investor,  Rolling  Stone
Magazine, Microsoft Investor, Individual Investor, SmartMoney Interactive, Art &
Auction,  Dow  Jones  Newswire,  and/or  Dow Jones  News.  The Fund may also use
comparative  performance  data from  indexes  such as the Dow  Jones  Industrial
Average,  Standard & Poor's 400, 500, Small Cap 600, 1,500, or Midcap 400, Value
Line Index, Wilshire 4,500, 5000, or Small Cap; NASDAQ/OTC  Composite,  New York
Stock Exchange; and the Russell 1000, 2000, 2500, 3000, 2000 Growth, 2000 Value,
or Midcap.  With respect to the rating  services,  the Fund may use  performance
information that ranks the Fund in any of the following  categories:  all funds,
aggressive growth funds, value funds, mid-cap funds, small-cap funds, growth and
income  funds,  equity  income funds,  and any  combination  of the above listed
categories.



                                    -23-

<PAGE>
                                BARON ASSET FUND

                           PART C. OTHER INFORMATION

ITEM 23.    EXHIBITS
            --------

                 a.  Declaration of Trust dated February 19, 1987.*
                 b.  By-laws dated February 19, 1987.*
                 c.  Specimen Share Certificates representing shares of
                     beneficial interest of $.01 par value.*
                 d.(1)  Investment Advisory Agreement between
                        Baron Asset Fund and BAMCO, Inc.*
                   (2)  Investment Advisory Agreement between
                        Baron Growth & Income Fund and BAMCO, Inc.*
                   (3)  Investment Advisory Agreement between
                        Baron Small Cap Fund and BAMCO, Inc.*
                 e.  Distribution Agreement with Baron Capital, Inc.*
                 f.  Inapplicable.
                 g.(1)  Custodian Agreement with The Bank of New York.*
                   (2)  Fee Schedule for Exhibit 8(a).*
                 h.  Inapplicable.
                 i.  Opinion and consent of counsel as to legality of shares
                     being registered (filed with Rule 24f-2 Notice).*
                 j.  Consent of Independent Certified Public Accountants.
                 k.  Inapplicable.
                 l.  Letter agreement between the Registrant and the Purchaser
                     of the Initial Shares.*
                 m.  Distribution Plan pursuant to Rule 12b-1.*
                 n.(1)  Financial Data Schedule for Baron Asset Fund
                   (2)  Baron Growth & Income Fund
                   (3)  Baron Small Cap Fund
                 o.  Rule 18f-3Plan*

         *Previously filed.

<PAGE>
ITEM 24.    PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT
            -------------------------------------------------------------

The  following   diagram   indicates  the  persons  under  common  control  with
Registrant, all of which are incorporated in New York.

         Ronald Baron

                  controls :       Baron Capital Group, Inc.

           and owns 100% of:       Baron Capital, Inc.
                                   BAMCO, Inc.
                                   Baron Capital Management, Inc.
 
Baron Capital,  Inc. serves as distributor of  Registrant's  shares and performs
brokerage  services for Registrant.  BAMCO, Inc. serves as investment adviser to
Registrant.  Baron Capital Management, Inc. is an affiliated investment adviser.
All of the above  corporate  entities file  consolidated  financial  statements.
Ronald Baron, President of Registrant,  is the controlling  shareholder of Baron
Capital Group, Inc. and serves as President of all the above entities.


ITEM 25.     INDEMNIFICATION
             ---------------

     Article IV of Registrant's Declaration of Trust states as follows:

     Section 4.1.  No Personal  Liability  Of  Shareholders,  Trustees,  Etc.
     ------------  ----------------------------------------------------------
     No shareholder shall be subject to any personal liability whatsoever to any
     Person in  connection  with  Trust  Property  or the acts,  obligations  or
     affairs of the Trust. No Trustee,  officer,  employee or agent of the Trust
     shall be subject to any personal liability  whatsoever to any Person, other
     than to the Trust of its shareholders, in connection with Trust Property of
     the affairs of the Trust,  save only that arising  from bad faith,  willful
     misfeasance,  gross  negligence  or reckless  disregard  of his duties with
     respect to such Person; and all such Persons shall look solely to the Trust
     Property, or to the Property of one or more specific series of the Trust if
     the claim  arises from the conduct of such  Trustee,  officer,  employee or
     agent with respect to only such Series,  for  satisfaction of claims of any
     nature  arising  in  connection  with  the  affairs  of the  Trust.  If any
     shareholder,  Trustee, officer,  employee, or agent, as such, of the Trust,
     is made a party to any suit or proceeding to enforce any such  liability of
     the  Trust,  he shall  not,  on account  thereof,  be held to any  personal
     liability.  The Trust shall  indemnify and hold each  shareholder  harmless
     from and against all claims and liabilities,  to which such shareholder may
     become  subject by reason of his being or having  been a  shareholder,  and
     shall  reimburse such  shareholder  out of the Trust Property for all legal
     and other expenses  reasonably  incurred by him in connection with any such
     claim or  liability.  Indemnification  and  reimbursement  required  by the
     preceding  sentence  shall be made  only out of  assets  of the one of more
     Series  whose shares were held by said  shareholder  at the time the act or
     event  occurred  which gave rise to the claim  against or liability of said
     shareholder. The rights accruing to a shareholder under this Section 4.1 be
     lawfully  entitled,  nor shall anything herein contained restrict the right
     of the Trust to  indemnify or reimburse a  shareholder  in any  appropriate
     situation even though not specifically provided herein.


     Section 4.2. Non-Liability of Trustees, Etc. 
     ------------ ------------------------------- 
     No Trustee,  officer, employee or agent of the Trust shall be liable to the
     Trust, its shareholders, or to any shareholder, Trustee, officer, employee,
     or agent thereof for any

<PAGE>
     action or failure  to act  (including  without  limitation  the  failure to
     compel in any way any former or acting  Trustee  to  redress  any breach of
     trust) except for his own bad faith, willful misfeasance,  gross negligence
     or reckless disregard of the duties involved in the conduct of his office.

     Section 4.3. Mandatory Indemnification.
     ------------ --------------------------
     (a) Subject to the  exceptions and  limitations  contained in paragraph (b)
     below:

          (i) every  person  who is, or has been,  a Trustee  or  officer of the
          Trust  shall be  indemnified  by the Trust,  or by one or more  Series
          thereof if the claim  arises from his or her conduct  with  respect to
          only such Series to the fullest  extent  permitted  by law against all
          liability and against all expenses  reasonably incurred or paid by him
          in connection with any claim,  action,  suit or proceeding in which he
          becomes  involved  as a party or  otherwise  by virtue of his being or
          having been a Trustee or officer and against  amounts paid or incurred
          by him in the settlement thereof;

          (ii) the words "claim,"  "action," "suit," or "proceeding" shall apply
          to all claims,  actions,  suits or proceedings  (civil,  criminal,  or
          other,  including  appeals),  actual  or  threatened;  and  the  words
          "liability"  and  "expenses"   shall  include,   without   limitation,
          attorneys' fees, costs, judgments, amounts paid in settlement,  fines,
          penalties and other liabilities.

     (b) No indemnification shall be provided hereunder to a Trustee or officer:

          (i)  against  any  liability  to the Trust or a Series  thereof or the
          shareholders  by reason  of  willful  misfeasance,  bad  faith,  gross
          negligence or reckless disregard of the duties involved in the conduct
          of his office;

          (ii) with respect to any matter as to which he shall have been finally
          adjudicated not the have acted in good faith in the reasonable  belief
          that his  action  was in the best  interest  of the  Trust or a Series
          thereof;

          (iii) in the event of a settlement or other  disposition not involving
          a final  adjudication as provided in paragraph  (b)(ii) resulting in a
          payment by a Trustee or officer, unless there has been a determination
          that such  Trustee or officer  did not engage in willful  misfeasance,
          bad  faith,  gross  negligence  or  reckless  disregard  of the duties
          involved in the conduct of his office:

               (A) by the court or other body  approving the settlement or other
               disposition; or

               (B) based upon a review of readily available facts (as opposed to
               a full trial-type  inquiry) by (x) vote of a majority of the Non-
               interested  Trustees  acting  on  the  matter  (provided  that  a
               majority of the Non-interested Trustees then in office act on the
               matter) or (y) written opinion of independent legal counsel.

     (c) The rights of indemnification herein provided may be insured against by
     policies maintained by the Trust, shall be severable,  shall not affect any
     other  rights to which any 
<PAGE>

     Trustee or officer may now or hereafter be entitled, shall continue as to a
     person who has ceased to be such  Trustee or officer and shall inure to the
     benefit  of the  heirs,  executors,  administrators  and  assigns of such a
     person. Nothing contained herein shall affect any rights to indemnification
     to which  personnel  of the Trust other than  Trustees  and officers may be
     entitled by contract or otherwise under law.

     (d) Expenses of  preparation  and  presentation  of a defense to any claim,
     action,  suit or proceeding of the character  described in paragraph (a) of
     this Section 4.3 may be advanced by the Trust or a Series  thereof prior to
     final disposition thereof upon receipt of an undertaking by or on behalf of
     the recipient to repay such amount if it is ultimately  determined  that he
     is not entitled to  indemnification  under this Section 4.3,  provided that
     either:

          (i)  such  undertaking  is  secured  by a  surety  bond or some  other
          appropriate security provided by the recipient, or the Trust or Series
          thereof  shall  be  insured  against  losses  arising  out of any such
          advances; or

          (ii) a majority of the  Non-interested  Trustees  acting on the matter
          (provided  that a majority of the  Non-interested  Trustees act on the
          matter) or an  independent  legal  counsel in a written  opinion shall
          determine,  based upon a review of readily available facts (as opposed
          to a full  trial-type  inquiry),  that there is reason to believe that
          the recipient ultimately will be found entitled to indemnification.

     As used in this Section 4.3, a  "Non-interested  Trustee" is one who is not
(i) an "Interested  Person" of the Trust (including anyone who has been exempted
from  being an  "Interested  Person"  by any  rule,  regulation  or order of the
Commission), or (ii) involved in the claim, action, suit or proceeding.

ITEM 26. BUSINESS OR OTHER CONNECTIONS OF INVESTMENT ADVISER
         ---------------------------------------------------

     The business  and other  connections  of BAMCO,  Inc. is  summarized  under
"Management  of  the  Fund"  in  the  Prospectus  constituting  Part  A  of  the
Registration Statement, which summary is incorporated herein by reference.
     The business and other  connections of the officers and directors of BAMCO,
Inc. is currently listed in the investment adviser  registration on Form ADV for
BAMCO, Inc. (File No. 801-29080) and is incorporated herein by reference.

ITEM 27. PRINCIPAL UNDERWRITERS
         ----------------------

         (a) Inapplicable.

         (b)
<PAGE>

<TABLE>
<CAPTION>
           (1)                               (2)                         (3)
<S>                                 <C>                              <C>
                                    POSITIONS AND                    POSITIONS AND
NAME AND PRINCIPAL                  OFFICES WITH                     OFFICES WITH
BUSINESS ADDRESS                    UNDERWRITER                      REGISTRANT 
- ------------------                  ---------------                  -------------
Ronald Baron                        Director,                        Trustee,
767 Fifth Avenue                    President and                    President and
New York, N.Y. 10153                Chairman                         CEO

Susan Robbins                       Director                         Vice President
767 Fifth Avenue                    and Vice President
New York, N.Y. 10153

Peggy Wong                          Treasurer and CFO                Treasurer and CFO
767 Fifth Avenue
New York, N.Y. 10153

Morty Schaja                        Vice President and               Trustee and
767 Fifth Avenue                    COO                              Vice President
New York, N.Y. 10153

Clifford Greenberg                  Vice President                   Vice President
767 Fifth Avenue
New York, N.Y. 10153

Linda S. Martinson                  Secretary, Vice President        Trustee, Vice President
767 Fifth Avenue                    and General Counsel              and Secretary
New York, N.Y. 10153

</TABLE>
         (c) Inapplicable.

ITEM 28. LOCATION OF ACCOUNTS AND RECORDS
         --------------------------------

     Certain  accounts,  books and other documents  required to be maintained by
Section 31 (a) of the Investment  Company Act of 1940 and the Rules  promulgated
thereunder  are  maintained at the offices of the  Registrant,  BAMCO,  Inc. and
Baron Capital,  Inc., 767 Fifth Avenue, New York, NY 10153.  Records relating to
the duties of the  Registrant's  transfer  agent are  maintained by DST Systems,
Inc.  1004  Baltimore  Avenue,  Kansas  City,  MO 64105 and of the  Registrant's
custodian are maintained by The Bank of New York, 48 Wall Street, New York, N.Y.
10015.

ITEM 29. MANAGEMENT SERVICES
         -------------------
         Inapplicable.

ITEM 30. UNDERTAKINGS
         ------------

     Insofar as  indemnification  for liability arising under the Securities Act
of 1933 may be permitted to Trustees,  officers and  controlling  persons of the
Registrant pursuant to the foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such  indemnification  is against  public policy as expressed in the Act and is,
therefore,  unenforceable. In the event that a claim for indemnification against
such liabilities  (other than the payment by the Registrant of expenses incurred
or paid by a Trustee,  officer or  controlling  person of the  Registrant in the
successful 

<PAGE>
defense of any action, suit or proceeding) is asserted by such Trustee,  officer
or controlling  person in connection with the securities being  registered,  the
Registrant  will,  unless in the  opinion  of its  counsel  the  matter has been
settled by controlling precedent,  submit to a court of appropriate jurisdiction
the question  whether such  indemnification  by it is against  public  policy as
expressed  in the Act and will be  governed  by the final  adjudication  of such
issue.



                                   SIGNATURES
                                   ----------

     Pursuant  to  the  requirement  of  the  Securities  Act of  1933  and  the
Investment  Company Act of 1940,  the Fund  (certifies  that it meets all of the
requirement for effectiveness of this  registration  statement under rule 485(b)
under the Securities Act and) has duly caused this post -effective amendment No.
15 to the registration  statement to be signed on its behalf by the undersigned,
duly  authorized,  in the City of New York, and the State of New York on the day
of November, 1998.

                                            BARON ASSET FUND


                                            By:  s/ Ronald Baron
                                                 ----------------
                                                    Ronald Baron, President


<PAGE>

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
post-effective  amendment No. 16 to the  registration  statement has been signed
below by the following persons in the capacities and on the dates indicated.


SIGNATURES                      TITLE                          DATE
- ----------                      -----                          ----

s/ Ronald Baron                 President (Principal           January 28, 1999
- ---------------                 Executive Officer) &
   Ronald Baron                 Trustee


*s/ Raymond Noveck              Trustee                        January 28, 1999
- ------------------
    Raymond Noveck


s/ Linda S. Martinson           Secretary,                     January 28, 1999
- ---------------------           Vice President & Trustee
Linda S. Martinson

<PAGE>

SIGNATURES                      TITLE                          DATE
- ----------                      -----                          ----
s/ Peggy Wong                   Treasurer (Principal           January 28, 1999
- -------------                   Financial & Accounting
   Peggy Wong                   Officer) 


*s/ Mark M. Feldman             Trustee                        January 28, 1999
- -------------------
    Mark M. Feldman


*s/ Norman S. Edelcup           Trustee                        January 28, 1999 
- ---------------------
    Norman S. Edelcup


*s/ Charles N. Mathewson        Trustee                        January 28, 1999 
- ------------------------
    Charles N. Mathewson


*s/ Irwin Greenberg             Trustee                        January 28, 1999
- -------------------
    Irwin Greenberg


*s/ David A. Silverman          Trustee                        January 28, 1999
- ----------------------
    David A. Silverman


s/ M. Schaja                    Trustee                        January 28, 1999
- ------------                    Vice President &
   M. Schaja



*By: s/ Linda S. Martinson
     ---------------------
       Linda S. Martinson

    Attorney-in-fact pursuant to a power of attorney previously filed.


Dated:



                           CONSENT OF INDEPENDENT ACCOUNTANTS
                           ----------------------------------


We consent to the  incorporation  by  reference  in this  statement on Form N-1A
(Securities Act File No. 33-12112) of our report dated November 23, 1998, on our
audit of the  financial  statements  and  highlights  of the Baron  Asset  Fund,
(comprising,  Baron Asset Fund,  Baron  Growth & Income Fund and Baron Small Cap
Fund).

We also  consent  to the  reference  to our furm under the  captions  "Financial
Highlights"  in the  prospectus  and "Other  Information"  in the  statement  of
additional information.




                                             PricewaterhouseCoopers, LLP


New York, New York
January 29, 1999


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