Tree, 5-20 (25) m tall, to 50 (70) dbh, often buttressed, with aerial roots. Leaves clustered at apex of branches; stipules densely imbricate, to 7 cm long, ca 1 cm wide, becoming weathered and subligneous; petioles to 1 cm long; blades linear-obovate, usually obtuse at apex, cuneate at base, 20-100 cm long, 15-25 cm wide, glabrous, coriaceous, the margins uneven; lateral veins prominent. Panicles terminal, large, exceeding uppermost leaves; flowers 5-parted, somewhat zygomorphic; sepals ca 5 mm long, thick, divergent at anthesis; petals yellow, obovate, concave, 2-3 cm long; stamens ca 80; filaments ca 1 cm long; anthers linear, ca 1 cm long, clustered opposite pistil; pistil stipitate, held to one side of flower, the stipe ca 6 mm long; ovary ca 1 cm long and 5 mm wide; style minute. Capsules narrowly ellipsoid, to 4 (6.5) cm long and 1 cm diam, splitting longitudinally into 5 narrow segments; seeds many, small, with 2 long, narrow, lateral wings, the seminiferous area ca 2 mm long and 1 mm wide, the wings to 1 cm long, ca 1 mm wide at seed, tapering to a narrow point. Croat 8163. Occasional, on the shore. Flowers principally in the late rainy season to the middle of the dry season (August to March). The fruits probably mature principally in the dry season.