FLORA OF VIETNAM Orchidaceae Juss. Bulbophyllum purpurifolium Aver.
N. Vietnam, Thanh Hoa prov., Ba Thuoc distr., Co Lung municipality, territory of Pu Luong protected area, near Co Lung village, Nui Doan (Pha Doan) mountain system (20°26′30′'N, 105°11′32′'E). Primary evergreen broad-leaved dry forest along tops of remnant highly eroded karst limestone ridge at elev. 500-550 m a.s.l. Lithophytic creeping vine. Leaves deep violet below. Occasional.