Population structure and reproduction in the neotropical dioecious tree Compsoneura sprucei.

In rain forest study plots, the sexes of Compsoneura sprucei (Myristicaceae) were radomly distributed and similar in vegetative dimensions. The sex ratio among adults was estimated as 1.25 male: female. The population showed two flowering episodes per year, of unequal intensity. Sexual dimorphisms in order of increasing difference included the frequency of flowering, the number of flowers per inflorescence and the number of inflorescences per tree. Most females matured only 0-10 seeds per tree per flowering episode. Tree size was a better indicator of fecundity in males than females. Reproduction in both sexes was dominated by a very few prolific trees.