FLORA OF VIETNAM Orchidaceae Anthogonium gracile Wall. ex Lindl.
Son La Prov., Moc Chau Distr., Chieng Son comm., Pha Luong village, Pha Luong Mountain (elevation from Pha Luong village at 930 m to Mt. peak at 1860 m a.s.l.).
Open secondary scrub after fire on flat sandy Pha Luong summit composed with eroded red-brown sandstone at elevation 1800-1850 m a.s.l. around point 20°40′23.0N 104°37′52.0E.
Terrestrial tuberiferous herb in open sandy and rocky place. Flowers pure white. Not common.