Knema percoriacea J.Sinclair, Gard. Bull. Sing. 18 (1961)
Latin for 'very tough or leathery', referring to the leaves.

Description
Mid-canopy tree up to 33 m tall and 49 cm dbh. Stem with red sap. Stipules absent. Leaves alternate, simple, penni-veined, hairy to glabrous below, whitish below. Flowers ca. 7 mm diameter, yellow-orange, placed in bundles. Fruits ca. 33 mm long, yellow-orange-brown, densely hairy, dehiscent capsules. Seeds with nearly undivided red aril.

Ecology
In undisturbed mixed dipterocarp and keranga forests up to 500 m altitude. Usually on hillsides and ridges, rarely on alluvial sites. On sandy soils, sometimes also on clay soils. In secondary forests usually present as a pre-disturbance remnant.

Distribution
Borneo (throughout the island).

Local names in Borneo
Kumpang, Mandarahan, Pendarahan.