In comparison with other Bornean figs Ficus deltoidea has a very unusual ecology.
- F. deltoidea is the only fig which which is adapted to grow as a true epiphyte i.e. without any roots in the ground.
- Although the fig fruits are small typically 0.4 to 1.5 cm diameter, the fig seeds are the largest of any fig. The seeds illustrated in this article are approx. 5 mm x 3 mm.
- Female fig wasps may enter multiple figs for pollination. With other fig species pollen carrying female wasps typically die inside inside the first fig they enter.
- The gall flowers (male ovaries) develop a hard capsule approx. I mm x 1 mm diameter to act as a brood chamber for the fig wasp perhaps indicating possible animal dispersal of the capsule.
- There are no known insects which are parasitic on Ficus deltoidea figs.
Drawing by Corner (1967).
Thanks to Dr Zainal Zahari Zainuddin of the SFGC for the information and photos.