Tree 20-40 m. Leaves (thinly) coriaceous, elliptic-oblong or oblong-oblanceolate, 16-44 by 8—14.5(—18) cm, base narrowly rounded or subcordate, apex ± blunt (rounded) or acute; Inflorescences between the leaves or below, paniculate, pedunculate, hairs mealy, 0.1-0.2(-0.3) mm; Fruits 1 or 2, ellipsoid, 7-9 by 4.5-6 cm, with the style remnant ± lateral (always?), glabrescent, indumentum mealy, dark brown, hairs 0.1 mm (persistent at the very base);
Asia-Tropical: Borneo present (Sarawak present), E & NE Kalimantan present
Malesia: Borneo (Sarawak, E & NE Kalimantan). No recent collections known.
A lofty tree, apparently related to M. maxima, the latter differing in the lower leaf surfaces which are (brownish) grey on drying, with subpersistent very thin indumentum, not obviously papillose, larger inflorescences, somewhat more delicate flowers, the androphore pubescent only in the lower half, and indumentum of the fruits longer persistent.