FLORA OF VIETNAM Orchidaceae Paphiopedilum concolor (Batem.) Pfitzer
Son La Prov., Van Ho Distr., Xuan Nha Municipality, Pu Lau village, territory of Xuan Nha natural reserve.
Remnants of primary and secondary broad-leaved evergreen dry forest on cliffs and on very steep slopes of remnant hill composed by highly eroded stratified dark gray shale limestone at elevation 500-700 m a.s.l. around point 20°40′35.4″N 104°48′14.3″E.
Lithophytic rosulate clustering herb on shady cliffs, particularly on travertine deposits near mountain top. Leaves finely tessellated with green and light gray-green below, above dark violet. Common.