Trees, semiepiphytic pseudovines, or parasitic shrubs, deciduous. Young branches pithed. Leaves opposite, leathery, abaxially sometimes glandular at vein axils, margin entire. Inflorescences of lateral thyrses or racemes; cymes 3-9-flowered. Calyx campanulate, thick, irregularly 3- or 4-lobed or apex truncate. Corolla tube short, incurved; limb 2-lipped; lower lip 3-lobed, spreading; upper lip 2-lobed, erect, exceeding lower lip. Stamens didynamous, hairy, inserted near tube base, exserted; anthers basifixed, oblong-sagittate, base 2-lobed, locules parallel and confluent at apex; staminodes absent. Styles elongated, apex incurved; stigma inconspicuous. Capsule 2-valved, septicidal; valves margin involute, separating from placental column. Seeds numerous, linear, membranous winged.

Two species: Bhutan, China, Indonesia, Myanmar, Nepal, Sikkim, Vietnam; one species in China.