Shrubs, or small trees, lacticiferous. Leaves opposite, non-glandular, pinnately-nerved, pitted beneath in the axils of the midrib and principal nerves; petiolate and usually estipulate. Inflorescences umbellate, terminal or sometimes axillary, few-to several-flowered. Flowers small to medium-sized; calyx 5-lobed, the lobes + equal, bearing 1-2 alternately placed squamellae within; corolla salverform, without appendages, the orifice sometimes conspicuously callose-thickened, the limb 5-lobed, dextrorsely convolute; stamens 5, exserted or included, the anthers connivent and agglutinated to the stigma, with an enlarged connective character-
ized by a tuft of hair; gynoecium 2-carpellate, apocarpous, the ovary superior, ovules many, nectaries 5, separate or ? connate basally, style 1, the stigma fusi-form-subcapitate. Fruit apocarpous, of 2 follicles, or rarely 1 by abortion, + spreading, slender to broadly fusiform; seeds many, dry, glabrous or pubescent, but not comose apically.