Erect shrub, up to 2 m high. Leaves chartaceous, ovate, obovate, broad-elliptic, elliptic, or lanceolate, 10-26 by 4.5-9 cm; Inflorescences axillary, often in the axils of leaf scars, usually simple and spiciform, up to 1.5 cm long; Stamens (15-) 20-22, in 4 whorls (can easily be observed in young buds); Capsules slender, up to 9 cm long, acute or pointed at both ends, obscurely 4-angular, slightly twisted, loosely puberulous. Seeds ellipsoid, 3-3.5 by 1.5 mm, triangular, irregularly and transversely corrugated.
Asia-Tropical: Malaya (Peninsular Malaysia present), Kedah present, Kelantan present, Langkawi present, Pahang present, Peninsular Thailand present, Perak present, Selangor present
Peninsular Thailand; in Malesia: Malay Peninsula (Kedah, also Langkawi, Perak, Kelantan, Pahang, Selangor).