FLORA OF VIETNAM Orchidaceae Juss. Phaius flavus (Blume) Lindl.
N. Vietnam, Son La prov., Moc Chau distr., Long Luong municipality, near Sang Cai village (20°45′51′'N, 104°51′26′'E). Primary wet broad-leaved evergreen and semideciduous mossy forest along remnant limestone highly eroded ridge at elev. 1300-1450 m a.s.l. Lithophytic herb on steep shady rocky slope. Leaves with yellow spots. Flower buds yellow. Common.