In comparison with other Bornean figs Ficus deltoidea has a very unusual ecology.

  1. F. deltoidea is the only fig which which is adapted to grow as a true epiphyte i.e. without any roots in the ground.
  2. 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.
  3. 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.
  4. The gall flowers (male ovaries) develop a hard capsuleĀ  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.
  5. 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.


Nasuha (2017) Deltoidea seed and wasp production in oil palm

Mohd. Hatta (2020) Pollination of Ficus deltoidea in oil palm plantations