Engelhardia roxburghiana Lindl.

Tree ± 5-20 m, sometimes with low, rounded buttresses. Innovations bronze-coloured with golden yellow glandular scales which become brown when older. Leaf rachis 5.5-14 cm, as the twig glabrous to sometimes densely brown puberulous, 2-4-jugate; leaflets coriaceous, on a stalk 6-12 mm forming mostly a distinct joint with the rachis; blade (2.4-)2.8-3.6(-4.0) times as long as wide, widest mostly below the middle, sometimes halfway, (8-)10-16(-23) by (2-)3.5-5(-7.5) cm; base very unequal, acute, often baSis-copically somewhat decurrent, top narrowed, gradually bluntly acuminate; midrib narrowly raised above; margin entire, surfaces in dry state never even-coloured, but with dull shades of greenish, greyish, brownish, or blackish, glabrous but underneath yellow to brown glandular-scaly. Probably sometimes dioecious, but mostly the inflorescences bisexual, paniculate, terminal on normal or slightly weaker lateral twigs, 2-4 cm peduncled, with central female catkin (which may be wanting) and 2-6 basal male catkins subtended by early caducuous bracts; rarely the female catkin solitary. Flowers scaly. Male catkins 8-12 cm long in all, 0.5-2 cm stalked; rachis slender, scaly, not hairy; bract ± 2 by 1 mm, obscurely 3-lobed at the top, perianth lobes 4, not reduced, strongly cucullate, 1-1.25 cm diam., with membranous margin; stamens (8-)12, inserted with (2-)3 at the base of each perianth lobe, filament and anther both 1/2 mm long? in some stamens reduced to 1/3 mm, glabrous. Fruiting catkins 12-22 cm long in all, peduncle 2-5.5 cm, slender, rachis tomentose, sometimes also scaly. Nut 4-8 mm stalked, transversely ellipsoid, 4-5 mm diam., scaly, not hairy; wing (3-)5-5.5 cm long with the nut, 0.7-1.4(-1.8) cm wide, hardly connate with the nut, adaxial lobe almost none; perianth lobes very equal and regular, 1-2 mm long, on top of the nut together enclosing the 4 sessile stigmas.

Dense, primary, mixed dipterocarp forest in hilly country, growing on clay-rich, fairly fertile soils; at elevations up to 1,750 metres.

Uses. In Sumatra said to be a fish-poison.

Can be grown by seedlings.