Dipterocarpus acutangulus Vesque

Twig, bud, stipule (outside only), petiole and leaf beneath at first densely buff pubescent; persistent on leaf bud and stipule, +-caducous elsewhere. Twig c. 3 mm ø apically, becoming glabrous, terete, with swollen amplexicaul stipule scars. Bud 3-12 by 2.5-5 mm, ovoid, broad and short, subacute; occasionally glabrous. Stipule c. 5 by 0.8 cm, linear, obtuse. Leaves 7-10 by 3-6 cm, elliptic to ovate; base obtuse or cuneate, apex with narrow c. 1 cm long acumen, margin sinuate; nerves 7-12 pairs, at c. 30°-45°; tertiary nerves dense, scalariform; petiole 1.5-2.5 cm long, to 1 mm ø. Flowers unknown. Raceme to 4 cm long, axillary, slender, glabrous. Fruit calyx glabrous; tube to 2.5 cm broad and long, globose or ellipsoid, becoming slightly impressed at the pedicel, constricted to c. 1 cm ø neck; with 5 rounded or angular woody ribs, 3-4 mm thick and c. 3 mm wide (often less pronounced), initiating from the impressed base and terminating abruptly at the insertion of the calyx lobes; surface warty, glabrous, pruinose; 2 longer lobes c. 10 by 2.5 cm, oblong-spatulate, slightly twisted, to 5 mm broad at base, 3-nerved, the 2 laterals of variable length; 3 shorter wings c. 5 mm long and broad, deltoid, subacute, with revolute margins.

Mixed diptercarp forest, on sandy soils, on coastal hills and inland ridges up to 1,000 metres.

Can be grown by seedlings.