Gonystylus forbesii Gilg

Tree 20-40 m by 35-85 cm. Branchlets blackish. Leaves elliptic, often almost rhomboid, 4—10(-11 (!i) by 2½-5 cm, base usually markedly cuneate, occasionally slightly rounded, apex mostly cuneate-acuminate or sometimes ± rounded and caudate, rather thinly chartaceous, shagreened on both surfaces, drying usually light ochraceous-brown, glabrous throughout or thinly puberulous below, especially on midrib; nerves slender, crowded, conspicuous below, much less so above, rather more steeply ascending than most spp. (cf. also G. pendulus), midrib narrowly channelled above, or rarely almost flat; petiole slender, 9-11 mm long. Inflorescence 5-15 cm long, considerably branched, shortly cinereo-ochraceo-tomentellous. Pedicels slender, 10-11 mm, tomentellous. Calyx shortly cupular, 4-6 mm long, 6-7 mm diam., tomentellous; sepals ovate-deltoid, 3-5 by 2-3 mm, sub-obtuse. Petals: +-10, ovate-deltoid, acuminate, 1-2 mm long, tomentellous throughout and densely retrorse-setulose within. Style glabrous. Fruit oblong-ellipsoid, 4 cm long, 3-valved.

An upper canopy tree, growing in undisturbed mixed dipterocarp, keranga and sub-montane forests; found on hillsides and ridges with sandy soils; at elevations up to 1,800 metres.

Can be grown by seedlings.