Description from Flora of China
Trees or shrubs with white latex. Leaves opposite. Cymes terminal, 3- to many flowered, bracteate; peduncle long or short; bracteoles small or large. Flowers white or rose, 5-merous. Calyx small, deeply divided, without glands. Corolla salverform, tube 2.3-5 cm, narrow, dilated at or below apex; throat without scales, pilose inside; lobes overlapping to right. Stamens inserted above middle of corolla tube; filaments very short; anthers narrowly oblong or ovate, included, free from pistil head, base rounded; disc scales alternate with ovaries. Ovaries 2, distinct; ovules 2 per locule. Style filiform; pistil head thickened, with a short basal collar and apiculate apex. Drupes 1 or 2, ellipsoid, 1- or 2-seeded. Seeds oblong, testa membranous, not comose.
About 20 species: SE Asia, three in China.