Shrubs or small trees, usually with milky latex. Leaves opposite, membranous or coriaceous, penninerved, eglandular or somewhat glandular in axil; petiole ± perfoliate. Inflorescence axillary or terminal 1-many flowered compound cymes. Calyx 5-lobed, lobes equal, usually with glands within. Corolla salverform, 5-lobed, lobes overlapping to the left in bud tube straight and cylindrical, without appendages. Stamens 5, included or exserted, attached in the middle or above the middle of the corolla tube, not united with stigma, connectives not enlarged. Disc shallow or absent. Carpels free; ovary superior, ovules many, stigma capitate or pentagonal. Follicles ovoid, oblong or reniform. Seeds numerous, ovoid or oblong.