FLORA OF VIETNAM Orchidaceae Paphiopedilum micranthum Tang & F.T.Wang
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 800-850 m a.s.l.
Remnants of primary broad-leaved and coniferous forest on ridge tops and on very steep slopes and cliffs of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone.
Lithophytic herb on narrow shelves and in crevices of shady vertical cliffs. Leaves deep green / light green tessellated above, deep dirty purple-violet below. Rare.