FLORA OF VIETNAM Orchidaceae Juss. Paphiopedilum hirsutissimum var. esquirolei (Schltr.) Karasawa et Saito
N. Vietnam, Thanh Hoa prov., Ba Thuoc distr., Co Lung municipality, territory of Pu Luong protected area, near Pu Luong village (20°27′01′'N, 105°11′03′'E). Primary very dry evergreen broad-leaved forest with Burrettiodendron hsienmu along tops of remnant karst limestone ridge at elev. 500-550 m a.s.l. Lithophyte herb on very steep slope and vertical cliff. Flowers of typical coloration. Very common.