FLORA OF VIETNAM Orchidaceae Juss. Eria boniana (Gagnep.) T.Tang et F.T.Wang ?
N. Vietnam, Son La prov., Moc Chau distr., Van Ho municipality, near Hua Tat village (20°46′13′'N, 104°46′12′'E). Primary broad-leaved evergreen closed wet forest along remnant limestone highly eroded ridge at elev. 1100-1300 m a.s.l. Lithophyte on vertical cliff of N exposition. Flowers light greenish-yellow, lip at center with light pink-violet keels. Locally abundant.