FLORA OF VIETNAM Orchidaceae Didymoplexis pallens Griff.?
Son La Prov., Van Ho Distr., Tan Xuan Municipality, Cot Moc village, territory of Xuan Nha natural reserve, eastern slopes of Pha Luong Mountain.
Remnants of primary and secondary broad-leaved evergreen humid forest on very steep mountain slopes composed by shale and sandstone at elevation 1000-1400 m a.s.l. around point 20°40′33.3″N 104°39′00.3″E.
Achlorophyllous dull light yellowish-pink tuberiferous herb on shady slope. Not common.