FLORA OF VIETNAM. Fam. Celastraceae. N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22°54'59"N, 106°31'44"E, at elevation 700-800 m a.s.l. Remnants of primary broad-leaved evergreen and coniferous forest along tops of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Woody vine 4-6 m long. Flowers with deep brown disc. Common. No HAL 5691 12 June 2004. . Collectors: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh.