Tree c. 8 m. Leaves chartaceous, oblong(-lanceolate), 5.5—12(—15) by 1.5-3.5 cm, base (sub) attenuate, apex acute or up to 2 cm acute-acuminate; Inflorescences: Fruits solitary, obovoid-oblong, apex shortly acute-mucronate, 1.7-1.8 by 1 cm, with hairs 0.3 mm long;
Asia-Tropical: Borneo present (Sarawak present), Mt Majau, Gat, upper Rejang River area present
Malesia: Borneo (Sarawak: Mt Majau, Gat, upper Rejang River area).
Knema muscosa superficially resembles slenderly built specimens of K kina-baluensis, or also K. tomentella, K malayana, and especially K. stenophylla, but from all these it differs by the blackish dots on the lower leaf surface, and the leaves at first with conspicuous dense hairs of variable sizes below, glabrescent. Knema kinabaluen-sis has much larger fruits; K tomentella has more striate twigs; K. malayana has larger flowers; K. stenophylla has a much less distinct venation on the upper leaf surface.