Large woody climbers with white latex. Branches terete or weakly angled, lenticellate; branchlets glabrous. Leaves opposite, petiolate; secondary veins rather straight, anastomosing into a looped intramarginal vein. Inflorescence terminal, cymose, glabrous; flowers 5-merous; actinomorphic. Sepals deciduous; colleters in a row at base inside. Corolla lobes dextrorse; open corolla salverform; tube narrow at base and widening at stamen insertion; lobes obovate, narrow at base, rounded at apex. Stamens sessile; anthers narrowly triangular, apex acute or acuminate, base sagittate, sterile at apex and base; weakly adnate to the style head. Disk a ring, 5-lobed. Gynoecium 2-carpellate, apocarpous but apically united into a common style, ovules numerous; style filiform; style head columnar and ribbed, with a basal collar. Fruit a pair of follicles, fusiform, slightly flattened, densely lenticellate. Seeds elliptic, flattened, without a terminal coma.
Home