Stereospermum Cham.

Rather tall, deciduous trees. Leaves 1-pinnate; leaflets a few pairs, diminishing in size downwards, underneath usually with flat, dish-or cup-shaped glands or glandular spots; no domatia (in Mai.). Thyrses well-branched, paniculiform, mostly terminal, or on old wood. Flowers fragrant (in Mai.). Calyx usually short-lobed. Corolla infundibuliform; basal tube mostly concealed in the calyx, upper part usually funnel-shaped; mouth bilabiate, upper lip 2-, lower 3-cleft, lobes subequal, rounded, crisped, toothed or laciniate. Stamens 4, didynamous, included, 5th rudimentary; anthers glabrous, cells divergent. Disk cupular to annular. Ovary cells each with 2 rows of many ovules. Capsule long linear, terete, mostly twisted, usually 4-angular in section; septum thick, corky, terete, with alternating notches to fit the thick seeds which appear in two rows; valves coriaceous. Seeds thick, trigonous, wedge-shaped, with a cross-groove, on both sides thinly winged; cotyledons folded, 2-lobed, radicle straight.

Largely confined to regions subject to a seasonal climate, all in the lowlands, in everwet rainforest obviously deciduous and flowering after a dry spell.