Calyx-teeth small but distinct, persistent
Petals creamy to yellow, sometimes suffused with or entirely blackish purple or greenish, glabrous, emarginate above with a large, acute, inflexed lobule
Umbels numerous, compound, pedunculate; involucre and involucel present, small
Trees, shrubs or perennial herbs with simple or imparipinnate leaves, commonly flowering before the leaves appear but sometimes together with them
Flowers polygamous, hermaphrodite or ♂, variously disposed
Leaves imparipinnate to trifoliolate, subternate or simple, regularly dentate; sheaths abrupt, rather short
Fruit very strongly dorsally compressed with wide but not thickened marginal wings and 3 prominent subalate, narrow dorsal ribs, glabrous; stylopodia obsolete, the short styles arising from the broad disk; vittae absent (or occasionally very rudimentary according to some authorities); carpophore bifid to the base
Endosperm strongly compressed, narrow, slightly concave on the centre of the commissural face.
Trees, or suffrutices with distinct woody underground rootstocks, deciduous and flowering precociously before the leaves are produced.
Stylopodium strongly depressed and represented only by a low domed structure, with a slightly lobed margin.
Fruit ovate to obovate, strongly dorsally compressed with a broad commissure; lateral wings well developed, but not thickened; dorsal ribs filiform.
Petals greenish, yellowish to creamy-white, rarely purplish.