Oroxylum Vent.

Glabrous tree, robust in all its parts. Leaves 2-3(-4)-pinnate, all nodes with in sicco shrinking articulations; leaflets entire. Flowers very large, fetid, nocturnal, in large terminal racemes (by exception in a thyrse). Calyx persistent, not articulated, coriaceous, closed in bud, with a fine apical pore, later opening campanulate, ± entire. Corolla funnel-shaped, lobes 5, subequal, imbricate in bud. Stamens 5, subequal, all fertile; anthers 2-celled, cells free, ± parallel. Ovary with rows of ovules in both cells. Capsule flat, very large, sword-shaped, linear; dissepiment flat, coriaceous. Seeds large in rows; insertion linear, 1 cm wide.

A characteristic, short-lived nomad tree, nowhere gregarious, not in mature rainforest but always in openings, secondary growths and thickets, rather indifferent to climate (also in teak forest under seasonal conditions) and soils, mostly below 1000 m, but in S.China up to 1375 m (HANDEL-MAZZETTI).