Tree to 20 m. Leaves chartaceous or thinly coriaceous, oblong-lanceolate to lanceolate, (6-) 10-25 by (2-)2.5-5 cm, apex acute-acuminate, base cuneate, upper surface (greenish) brown above, lower surface grey-glaucous, with subpersistent dense rusty to greyish hairs 0.1-0.2 mm long, or late glabrescent, with distinct hair scars; Inflorescences: Fruits 1 or 2 per infructescence, ellipsoid to obovoid, 1.5-1.8 by 1-1.3 cm, with rusty hairs 0.1 mm long;
Asia-Tropical: Malaya (Peninsular Malaysia present, Singapore present), Johore present, Pahang present, Perak present, Selangor present, Trengganu present
Malesia: Peninsular Malaysia (Perak, Trengganu, Pahang, Selangor, Johore), Singapore.
2 Apparently the species is restricted to Peninsular Malaysia. The records for Borneo mentioned by Sinclair ( ) are now referred to K. glaucescens. Shah & Kadim 526 (Peninsular Malaysia), after which Sinclair drew the emended description of the female flowers of K. communis, is now referred to K. glaucescens as well. 1 Knema communis resembles K. glaucescens, a species also with subpersistent indumentum on the lower leaf surface. The resembling K. malayana has larger and longer pedicelled male flowers, with 9-13 anthers, and a different indumentum on the lower leaf surface.