Small shrub to 2 m tall. Branchlets sparsely puberulent, more rarely glabrous or densely puberulent. Leaves: Inflorescence axes pubescent. Sepals 2.5-6.4 mm long, 0.7-1 mm wide at base, narrower for most of length; Stamens inserted at point where corolla tube widens; Ovaries 0.9-1 mm long; Fruit 8.5-19 cm by 2.2-3.5 mm. Seeds 4-9 by 0.8-1.4 mm;
Anambas Islands present, Asia-Tropical: Borneo present; Cambodia (Cambodia present); Laos (Laos present); Malaya (Peninsular Malaysia present); Thailand (Thailand present); Vietnam (Vietnam present), Langkawi present, Perlis present, West Kalimantan present
Thailand, LaosCambodia, Vietnam; in Malesia: Peninsular Malaysia (Langkawi, Perlis), Borneo (West Kalimantan, Anambas Islands).
This species is particularly variable in leaf shape and size. The occurrence of this species in Borneo is known only from a spirit collection in BO from West Kalimantan.
I.M. Turner - in Gard. Bull. Singapore. 1997: 129
Kerr - in Craib, Fl. Siam. 2. 1939: 451
Pit. - in Lecomte, Fl. Indo-Chine 3. 1933: 1166
Whitmore - in Tree Fl. Malaya. 1973: 5
Steenis - in Bull. Jard. Bot. Buitenzorg. 1948: 408
Ridl. - in Fl. Malay Penins. 1923: 349
D.J. Middleton - in Fl. Thailand. 1999: 76
Lý - in Feddes Repert. 1986: 619