Abstract: In Acer pensylvanicum, there is evidence that reproduction as a female is costly, which would lead to trade-offs in resource allocation.  If female flowers are removed from a raceme, the module may re-allocate resources to growth or to reproduction in the remaining flowers.  Five levels of flower removal were used to test this hypothesis.  Growth was measured as length and diameter of the internode.  Reproductive investment was measured as seed mass, samara size, and dispersal ability.  Characteristics of tree morphology that could affect resource acquisition were measured as well.  However, the flower removal treatments had no effect on our measurements of reproductive investment and growth.  This result was mostly due to a high raceme and flower abortion rate.  Fertility and abortion rates differed between areas on the study site.  Four of the tree morphology characteristics were correlated with the raceme and flower abortion rates.  All of the tree morphology characteristics in our study also exhibited relationships with measurements of growth and reproductive investment.   After taking these characteristics into account, our analysis showed some evidence of trade-offs in growth vs. reproduction.  Dispersal was measured as the flight time of the samara.  Heavier samaras fell faster, and longer ones flew longer.  Studying these relationships between morphology and components of fitness can yield insights into resource acquisition and allocation.