Horsfieldia angularis W.j.de Wilde

Tree 15-30 m. Twigs 2-angular, lower down subterete, with two ridges, 3-7(-10) mm diameter, early glabrescent, hairs grey-brown, 0.1 mm or less; bark striate, distinctly coarsely lenticellate, not flaking. Leaves membranous to thinly chartaceous, oblong (-lanceolate), 10-27 by 3-7.5 cm, base attenuate, apex acute-acuminate; upper surface drying pale to dark brown, often finely paler pustulate, lower surface glabrescent, hairs very minute, grey, stellate, less than 0.1 mm; dots absent; midrib slightly raised above; nerves 12-15 pairs, above thin and flattish or slightly sunken, lines of interarching not distinct; venation lax, faint; petiole 7-15 by 2-3 mm; leaf bud 10-15 by 2-2.5 mm, with hairs 0.1 mm. Inflorescences with rather dense hairs 0.2-0.3 mm; in male and female: 2 or 3 times branched, rather few-flowered, 3-4 by 2-2.5 cm, peduncle 0.3-0.6 cm long; bracts not seen, caducous; flowers (male) generally 2-4 together; perianth 2-4-lobed in male, 2(-3)-lobed in female, in the lower half with hairs 0.1 (-0.2) mm long; pedicel pubescent, not articulated. Male flowers: pedicel not tapering, 1-2 mm long; buds in lateral view circular or slightly transversely ellipsoid, not or only slightly laterally compressed, not collapsing on drying, 1.7-2.3 by 2.2-3.2 mm, cleft c. 9/10, lobes (0.2-)0.3 mm thick; androecium slightly laterally flattened (in 3-or 4-lobed flowers about 3-or 4-angular in cross section), above broadly rounded, 1.2-1.5 by 1.5-2.2 mm (Plate 1: 27); thecae 24 to c. 40 (in 4-lobed flowers), ± erect, free parts at apex to 0.1 mm, central column at apex narrowly hollowed for (1/3—) 1/2; androphore absent, the androecium ± broadly attached. Female flowers: pedicel 1-1.5 mm long; buds depressed globose, 2.5 by 3-3.2 mm, cleft c. 3/4; ovary ± depressed globose-ovoid, 1.2 by 1.5 mm, densely short-pubescent, style and stigma minutely 2-lobed, 0.1 by 0.3 mm. Fruits 5-10 per infructescence, short-ellipsoid, 1.7-2 by 1.4-1.7 cm, pubescent at very base, with coarse paler-coloured lenticel-like tubercles; pericarp thick-woody, 3-5 mm thick; fruiting pedicel 3-5 mm long; perianth not persistent.

It is a tropical plant. It grows in primary forest on clay soils. It grows on the coastal plain up to 600 m altitude.

The fruit are sour and edible.