FLORA OF VIETNAM Orchidaceae Thunia alba (Lindl.) Rchb.f.
N. Vietnam, prov. Lai Chau, distr. Sin Ho, municipality Ta Ngau about 30 km of Lai Chau town to the N (N 22°18′ E 103°15′). Secondary open wet mossy evergreen broadleaved forest with remnants of primary elements on rocky foothills of remnant karst limestone ridge at elev. about 1600 m. Lithophyte forb up to 1 m hg on open mossy limestone rock outcrops. Flowers odorless, white; lip with yellow center and purple veins on sidelobes. Locally common.
NTH 2749 25 May 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)