FLORA OF VIETNAM Orchidaceae Juss. Paphiopedilum concolor (Batem.) Pfitz.
N. Vietnam, Bac Can prov., Ba Be distr., Nam Mau municipality, near Hua Tang village, Ba Be national park (22°27′10′'N, 105°34′29′'E). Primary dry broad-leaved evergreen dry forest on very steep eroded limestone bluffs of Ba Be lake at elev. 200-250 m a.s.l. Lithophyte on shelves of vertical cliffs near lake shore. Leaves white-green tessellated above, violet spotted below. Not rare.