Shrub or tree to 10 m. Leaves thinly coriaceous, oblong or lanceolate, 9-35 by 2-7.5 cm, apex subacute or acute-acuminate, base rounded to attenuate, drying olivaceous or brown above; Inflorescences: Fruits 1-3 per infructescence, subglobose or broadly obovoid, 1.8-2.5 by 1.5-1.7 cm, with rusty hairs 0.3 mm long;
Asia-Tropical: Borneo present (Sarawak present), W & E Kalimantan present
Malesia: Borneo (Sarawak, W & E Kalimantan).
Knema uliginosa is related to K. intermedia, which differs in the more pronounced mammillate staminal disc, more distinctly reticulate leaves, and fruits with an easily rubbed off scurfy indumentum, and also to K. plumulosa which differs in the more conspicuous indumentum on twigs and leaves. Knema uliginosa may resemble K latericia, which differs in the cracking and flaking bark of the older twigs; compare also K. korthalsii.