Shrub or tree 4-20 m. Leaves chartaceous or coriaceous, elliptic to (oblong-)lanceolate, 11-45 by 2.5-14 cm, base subattenuate, rounded, or shallowly cordate, apex acute(-acuminate); Inflorescences: Fruits 1-3 per infructescence, subovoid or obovoid, apex subacute to obtuse, base attenuate to rounded, 2-3.8 by 1.5-2 cm, with rusty hairs 1-1.5 mm long, easily rubbed off; dry pericarp 2-4 mm thick; fruiting pedicel 3-10 mm long.
Asia-Tropical: Borneo present (Sabah present, Sarawak present), E Kalimantan present
Malesia: Borneo (Sarawak, rare; Sabah; E Kalimantan).
Knema oblonga is a variable species, with three subspecies. It may be confused with K. tridactyla and K. laurina (the type variety), with ± uniform dendroid hairs on the lower leaf surface, absence of crateriform hair scars on the upper leaf surface, and elongate male buds.