Heteromorpha Cham. & Schltdl.

Perennial herbs with a tuberous rootstock, shrubs or small trees, glabrous to ± hairy. Leaves simple and entire to trisect or pinnate with entire or somewhat crenulate leaflets, distincdy petiolate to subsessile. Involucre present, bracts small to large and leafy; involucel also present, bracteoles small but broad and conspicuous. Flowers hermaphrodite, the terminal umbel usually fruiting in advance of the remainder. Calyx-teeth distinct, acute, persistent in fruit. Petals creamy to greenish yellow, glabrous, papillose or hairy, emarginate above with an inflexed lobule. Fruit glabrous or more rarely pilose or papillose, broadly or narrowly obovoid or obpyriform, with a broad commissure; mericarps dissimilar, one with the intermediate primary ribs expanded into wings and the dorsal and marginal ribs much smaller, the other with the marginal and dorsal ribs winged and the intermediate ribs much smaller so that the fruit appears ± trigonous when viewed from above; stylopodia conical, ± crenulate-margined, with short, rather rigidly divergent styles; vittae solitary and conspicuous in the vallecular, 2 on the commissure, occasional small vittae also not infrequently occurring in the tips of the ribs or part way along them; carpophore bifid to the base. Endosperm pentagonal to broadly reniform or almost round in section.