Quang Tri Prov., Da Krong Distr., Ta Rut municipality, A Pul village, around point 16°24’29”N 107°01’07”E.
Highly destroyed primary and secondary broadleaved evergreen open forest along rocky river canyon composed with shale and sandstone at elev. about 300 m a.s.l.
Epiphyte on shady trees along river valley. Flowers dull yellow, tepals brownish-purple at the base, lip white. Common.