FLORA OF VIETNAM Orchidaceae Paphiopedilum hirsutissimum (Lindl.) Stein var. chiwuanum (T. Tang et F.T. Wang) P. Cribb
N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Yen Lac, vicinities of Yen Lac village (N 22°44′ E 105°50′). Primary semideciduous broad-leaved forest on steep slopes and bluffs of N exposition of remnant karst limestone ridge at 1300-1350 elev. Lithophyte herb on shady vertical cliffs. Flowers purple-violet with olive-greenish and brownish-purple. Not common.
CBL 1370 13 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)