Shorea inaequilateralis Symington

Large, buttressed, fissure-barked tree with pendent branches. Young parts shortly densely evenly pale tanny tomentose, persistent on young twig, panicle, leaf bud, outside of stipule, petiole and midrib above; persistently puberulent, appearing glabrous, on inside of stipule, lamina on both surfaces, and midrib beneath. Twig c. 2.5 by 1.5 mm ø apically, slightly compressed at first, becoming terete with a decurrent rib below the petiole insertion each side, becoming glabrous, smooth; stipule scars to 1.5 mm long, narrowly falcate, descending, obscured by tomentum. Bud 3-6 by 1.5-2.5 mm, ovoid, slightly compressed, acute. Stipule to 20 by 5 mm, subpersistent, narrowly hastate, acute. Leaves 9-14 by 4.5-7.5 cm, ovate, thin; base subcordate, distinctly unequal; acumen to 2 cm long, prominent, caudate; nerves 11-13 pairs, slender, raised beneath, at more than 90° at base, ascending towards apex; tertiary nerves slender, scalariform, well spaced, at c. 90° to nerves; midrib narrow, prominent, rounded beneath, evident but applanate above; petiole 5-8 mm long, short, stout. Panicle to 7 cm long, terminal or axillary, terete, pendent; singly branched, branchlets to 1.5 cm long, bearing to 4 flowers; bracteoles to 10 by 3 mm, narrowly deltoid, pubescent outside, glabrescent within. Flower bud to 12 by 3 mm, linear, acute. Calyx densely shortly pubescent on both surfaces; 3 outer lobes deltoid, subacute; 2 inner lobes shorter, prominently acuminate. Petals narrowly hastate, subacute, sparsely pubescent on parts exposed in bud. Stamens 15, in 3 subequal verticils; filaments broad, compressed at base, tapering abruptly medially and filiform distally; anther oblong; appendage to connective c. 3 times length of anther, reaching 1/2 length of style, slender, erect, scabrous towards apex. Ovary ovoid, tapering, sparsely pubescent, without distinct stylopodium; style about twice length of ovary, filiform, sparsely pubescent in the basal half, otherwise glabrous. Fruit calyx glabrescent but for the sparsely tawny pubescent base; 3 longer lobes to 14 by 2 mm, elliptic saccate thickened base; 2 shorter lobes to 12 by 0.9 cm, long, narrowly spatulate, acute, to 4 mm broad above the to 13 by 9 cm, unequal, narrowly spatulate, similar at base. Nut to 1.8 by 1.4 cm, ovoid, densely buff pubescent; style remnant to 6 mm long, slender, subpersistent, filiform.

A canopy to emergent tree growing on the banks of peat swamp streams and in mixed peat swamp forests.

Uses. A valuable heavy construction timber.

Can be grown by seedlings. Seeds needs soaking.