Koompassia malaccensis Maingay

Giant tree up to 45(-60) m high and 64(-120) cm in diam.; buttresses steep, planklike, thick and up to 3(-6) m high. Stipules broadly ovate, 2-2.5 mm wide, pubescent outside. Leaves 5-9(-14)-foliolate; rachis slender 6.5-19 cm, pubescent, glabrescent; petiole 1.5-4 cm; petiolules short, 4-7.5(-9) mm, densely minutely puberulous. Leaflets thinly to rigidly coriaceous, ovate-elliptic, elliptic-oblong or lanceolate, more or less symmetrical, 5.5-10.4(-12.5) by 1.5-5 cm; base usually rounded; apex acuminate; glabrous except minutely puberulous on the midrib above, densely to thinly pubescent beneath. Inflorescences up to 12 cm long, rachis pubescent, densely flowered; pedicels 0.75-2.5 mm, densely puberulous. Calyx lobes lanceolate, 2.5-3 by c. 1 mm, densely puberulous outside. Petals orbicular to obovate, c. 2.5 by 1.1 mm, rounded at the apex, glabrous. Stamens nearly half the length of the petals; filaments slender, 0.5-0.75 mm; anthers heart-shaped, about as long as the filaments, glabrous. Ovary c. 1 mm long, densely dark brown puberulous; style very short and stigma indistinct. Pods oblong, 9.5-15 by 3-4.5 cm incl. the wing, pubescent, veined. Seeds very flat, compressed, irregularly oblong, up to 3.3 by 1 cm, purplish black and shallowly rugose.

An emergent tree in freshwater peat-swamp forest; usually at elevations below 150 metres. Also found in sub-montane forests at elevations up to 1,100 metres.

UsesTimber eminently suitable for heavy permanent structures, and also good for flooring, railway sleepers, dock blocks, fence posts, shingles, etc. See under the genus.

Can be grown by seedlings.