Ficus borneensis

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Ficus borneensis

Description

Tree up to 20(-30) m tall, hemi-epiphytic or (secondarily?) terrestrial. internal hairs absent. Leaves spirally arranged to subdistichous; stipules (0.5-)1-1.5 cm long, glabrous or sparsely to densely minutely white puberulous, caducous. Ovary partly red.

Distribution

Asia-Tropical: Northern: present
Malesia: Borneo (northern).

Taxonomy

1Under this name three species described by Kochummen (1998) are combined. The figs are similar in shape, rather similar in dimensions, and basal bracts; the apex of the receptacle is flat and the ostiole closed. There are differences in the shape of the lamina which could be related to environmental conditions.
  • Form A (described as F. borneensis). — Lamina oblong to elliptic, apex acuminate, base cuneate to obtuse. — Forest, at altitudes up to 1800 m. — It resembles in its vegetative parts and fig size and shape F. pellucidopunctata, which differs clearly and only in the widely open ostiole. It resembles in its vegetative parts F. sumatrana, which differs in the subglobose fig receptacle.
  • Form B (described as F. chewii). — Lamina elliptic to oblong, often more thickly coriaceous, with shortly acuminate to obtuse or rounded apex, and rounded to obtuse base. — Forest, at altitudes between (650-)1000 and 1500 m. — This form resembles a collection from the Philippines, Mindanao (University of San Carlos 756) with ellipsoid figs as in F. borneensis but with an open ostiole. In other features it matches F. callophylla (in which it is provisionally included).
  • Form C (described as F. kerangasensis). — Lamina (sub)obovate, and often more thickly coriaceous; base cuneate to obtuse. — Kerangas forest, at low altitudes.

2 The shape of the figs of Form B of F. sundaica is similar to that of this species, but the figs are larger, 1.5-2 cm diameter. The other form of F. sundaica can be distinguished by the larger leaves, mostly 10-20 cm long.

Citation

Kochummen - in Tree Fl. Sabah & Sarawak. 2000: 236
Kochummen - in Tree Fl. Sabah & Sarawak. 2000: 222
Kochummen - in Tree Fl. Sabah & Sarawak. 2000: 226