Shorea platycarpa F.Heim

Large buttressed tree. Young twig, panicle, bud and petiole densely shortly persistently rust-brown scabrid pubescent, sparsely so on stipule, midrib above and leaf beneath, glabrescent on leaf above. Twig c. 3 mm ø apically, stout, ridged, verrucose; stipule scars short, narrow, ascending, obscure. Bud 4-6 by 3.5-5 mm, broadly ovoid, obtuse. Stipule to 10 by 6 mm, ovate, subacute. Leaves 9-17 by 5.5-10 cm, medium-sized to large, elliptic-oblong or broadly ovate, thinly coriaceous; base obtuse; acumen to 1 cm long, short, broad; nerves 16-20 pairs, close, straight, curved near margin, with or without scale-like axillary domatia (without in old trees); tertiary nerves distant, scalariform, slender but distinct, slightly diagonal to nerves; midrib broad, terete beneath, narrow yet hardly depressed above; petiole 1.5-2 cm long, stout. Panicle to 9 cm long, terminal or axillary, ribbed, straight, densely shortly persistently rust-brown scabrid pubescent; singly or doubly branched; bracteoles to 4 by 3 mm, broadly ovate, acute, densely shortly pubescent outside, glabrous within. Flower bud to 3 by 4 mm, ellipsoid-ovoid, obtuse. Calyx densely pubescent outside, glabrous within; 3 outer lobes ovate, obtuse, c. 2 x length of 2 inner lobes; inner lobes broadly ovate, prominently caudate. Petals pale yellow, narrowly lanceolate, densely pubescent on parts exposed in bud. Stamens 15, in 3 unequal verticils, the longest almost as long as the ovary; filaments compressed, tapering gradually; anthers subglobose; appendage to connective as long as anther, becoming reflexed. Ovary and stylopodium glabrescent, narrowly ovoid; style as long as ovary and stylopodium, filiform, glabrous. Fruit subsessile, calyx shortly persistently pubescent towards base, otherwise glabrescent; 2 longer lobes to 6.5 by 1.2 cm, narrowly spatulate, narrowly obtuse, to 4 mm broad above the to 5 by 4 mm elliptic slightly thickened saccate base; 2 shorter lobes to 2 cm long, linear, similar at base. Nut to 8 by 6 mm, ovoid, densely buff pubescent; style remnant short, acute.

An emergent tree in mixed peat swamp forest, especially near the coast; also on poorly drained podsols on former beach terraces.

Can be grown by seedlings. Seeds needs soaking.