Gonystylus affinis Radlk.

Tree, 9-24 m. Branchlets blackish. Leaves elliptic to almost oblong, 10-17 by 3½-8½ cm, broadly cuneate to rounded at base, shortly caudate-acuminate at apex, margin markedly revolute, chartaceous, drying various shades of dull brown or greenish-brown, strongly shagreened especially above, glabrous above, often rather persistently tomentellous below, especially on midrib; nervation relatively lax and not very conspicuous, patulous to widely spreading; petiole 1-1½ (—2) cm by 2-2½ mm. Inflorescences terminal, 8-12 cm long, of 1-3 main branches, each with several short side-branches, densely fulvous-tomentellous. Pedicels 8-14 mm, tomentellous. Calyx 5 mm long; sepals 3 mm long, deltoid-ovate, obtuse or sub-obtuse. Petals ± 20, filiform-subulate, 4-5 mm. Style glabrous. Fruit (?immature) up to 4½ cm long, 3-4-valved.

A mid-canopy tree in undisturbed mixed dipterocarp and keranga forests; usually growing on hillsides and ridges with sandy to clay soils; at elevations up to 300 metres.

Uses. Wood (reddish, floats in water) used for house-construction in Negri Sembilan (Mal. Pen.).

Can be grown by seedlings.