N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Thai Hoc, about 5-6 km to ENE of Nguyen Binh town (N 22°39′ E 105°57′). Secondary open shrubs on steep slopes of karst remnant limestone mesae at 500-550 m elev. Prostrate herb in wet place along streamlet. Flowers white. Very common.
CBL 1628 21 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)
Collectors: P.K.Loc, P.H.Hoang, Averyanov L.
Paphiopedilum hirsutissimum full in flower also was observed here on inaccessible limestone cliffs of N exposition at about 500-550 m elev. (photo available).