Ficus fistulosa is a small dioecious tree of forest margins and old hedges. In Singapore both male and female trees show intratree synchronization of fig production but little synchronization between trees. Individual trees bear 4-7 crops a year and leaf production occurs at irregular intervals throughout the year. MANY SPECIES OF Ficus HAVE BEEN REPORTED to exhibit asynchronous intraspecific flowering and fruiting coupled with strong synchronization within the crown of an individual tree (Janzen 1979, Newton and Lomo 1979, August 1981, Milton et al. 1982). An exception to these reports is the study by Hill (1967) on the figs of Hong Kong, where most species had more or less synchronized crops at predictable times of the year. This presumably reflects the extreme (for figs) seasonality of Hong Kong's climate (latitude 22011'N). Singapore (latitude 1017'N) has a typical equatorial climate with high temperatures year round and an average rainfall of more than 100 mm/mo. F. fistulosa Reinw. ex Blum. is a small dioecious tree, abundant in forest margins and old hedges. The figs are borne in clusters on woody knobs or short, leafless twigs on the trunk and main branches. Its pollination ecology was studied in Singapore by Galil (1973) and its phenology in Hong Kong by Hill (1967).
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Richard T. Corlett (1987) studied this question.