Dipterocarpus costulatus
Content
Description
Twigs and buds frequently pruinose.
Leaves 12-20 by 7-14 cm, broadly elliptic to ovate, thickly coriaceous, with prominently cuneate base, obtuse to shortly acuminate, persistently folded between the 11-14 pairs of prominent nerves;
Stipule to 16 by 2 cm, lorate, subacute.
Stamens c. 24, slightly shorter than the style;
Ovary ovoid, densely pubescent;
Distribution
Asia-Tropical, E. Atjeh present, E. Sumatra present, Indragiri present, Langkat present, Lower Kapuas present, Nunukan present, P. Lingga present, Tawau Distr present, Tidung present, W. Sarawak present, excepting seasonal areas present, north-east Borneo present
Malesia: Malaya (excepting seasonal areas), E. Sumatra (E. Atjeh, Langkat, Indragiri, P. Lingga), west and north-east Borneo (Lower Kapuas, W. Sarawak; Tawau Distr., Nunukan and Tidung).