FLORA OF VIETNAM Orchidaceae Phaius flavus (Blume) Lindl.
Tuyen Quang Prov., Na Hang Distr., Sinh Long Municipality, Khuoi Phin village, around point 22°38′21.9″N, 105°20′43.5″E.
Primary evergreen mixed humid forest on rocky limestone on highly eroded karstic hills composed with gray solid marble-like limestone at elevation 1100-1200 m a.s.l.
Terrestrial and lithophytic herb to 1.2 m tall in shady places. Leaves usually with many yellowish spots. Common.