FLORA OF VIETNAM Orchidaceae Epigeneium labuanum (Lindl.) Summerh.
Vietnam, Lang Son Prov., Bac Son Distr., Tan Tri Municipality, around Na Mau village.
Highly degraded primary and secondary broad-leaved evergreen forest on very steep slopes and along tops of ridge composed with solid highly eroded crystalline gray marble-like limestone at elevation about 500-600 m a.s.l.
Lithophytic and epiphytic creeping herb. Flowers white, lip with pink to purple-violet keels. Very common.