Tree 8-17 m. Leaves chartaceous, sometimes slightly bullate, elliptic to oblong, 10-23 by 5-10(-12) cm, base nearly rounded to subattenuate, apex (acute-)acu-minate; Inflorescences with dense woolly-shaggy hairs 2-3 mm long; Fruits 2-4 per infructescence, broadly ovoid-ellipsoid, 2-2.2 by 1.5-1.6 cm, glabrescent, with remnants of minute hairs 0.1 mm at the base, without distinct lenticels or tubercles, pericarp 2 mm thick;
Asia-Tropical: Borneo present (Sabah present, Sarawak present)
Malesia: Borneo (Sarawak: 4th & 5th Div.; Sabah).
A montane species closely related to H. splendida and especially to H. reticulata. Horsfieldia rufo-lanata differs in the longer woolly hairs of the inflorescences, the almost globose (not depressed-globose) male perianth, the near-globose androecium, more thecae, 26-30(-40) as against 20-24 and 16-20 in H. reticulata and H. splendida, respectively. The nerves on the upper leaf surface of H. rufo-lanata apparently remain pubescent for a much longer time, and are generally raised; in contrast with H. splendida, the blades are usually smaller and more elliptic and have stiffer hairs on the lower surface; H. reticulata has a much less conspicuous indumentum on the lower leaf surface.