L.Averyanov, K.L.Phan, V.T.Pham & T.V.Nguyen HAL 5713
Locality
N Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe municipality, Pac Nga village, around the point 22°54'59 N, 106°31'44 E, at elev. of 700-800 m a.s.l. Closed secondary forest and remnants of primary broad-leaved evergreen forest on very steep rocky slopes of rocky ridges and mesae composed of light gray solid marble-like highly eroded crystalline limestone.