FLORA OF VIETNAM Orchidaceae Bulbophyllum hymenanthum Hook.f.
N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Ca Thanh (N 22°44′ E 105°50′). Primary semideciduous mixed forest along tops of remnant karst limestone ridge at 1350-1400 m elev. Creeping lithophyte. Flowers: tepals pale yellowish, lip, column foot and column purple-violet, lip sides yellowish, anther yellow. Rare.
CBL 1304c 13 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)