Herb woody at base, shrub-like, up to 1 m high. Leaves chartaceous, elliptic, lanceolate, obovate, rarely oblanceolate, 10-21 by 4.5-7.5 cm; Inflorescences axillary, usually in the axils of foliage leaves, spiciform or racemiform, solitary or rarely 2 in an axil, pubescent; Stamens 6, in 1 whorl; Capsules slender, up to 16 cm long, cylindric or slightly angular, twisted, sparsely pubescent. Seeds ovoid, trigonous, c. 4.5 by 2.5 mm, transversely rugose.
Asia-Tropical, Kedah present, Laut Tador & Gedong Biara Estates present, N. Malay Peninsula present, Northern Sumatra present, Padang Lawas present, Pattani present, Peninsular Burma present, Peninsular Thailand present, Perlis present, Ta Pe present, Tapanuli present, near Neckey present
Peninsular Burma (Ta Pe) and Peninsular Thailand (Pattani and near Neckey); in Malesia: Northern Sumatra (TapanuliPadang Lawas; East Coast: Laut Tador & Gedong Biara Estates) and N. Malay Peninsula (Perlis and Kedah).