FLORA OF VIETNAM Orchidaceae Collabium chinense (Rolfe) Tang & F.T.Wang
Son La Prov., Moc Chau Distr., Chieng Son comm., Hin Pen village, around point 20°42′36.7N 104°35′11.0E.
Primary and secondary evergreen broad-leaved forest on very steep slopes and cliffs of highly eroded red-brown sandstone at elevation about 1200 m a.s.l. Terrestrial creeping herb in shady place. Flowers green, lop white. Occasional.