Vietnam, Thua Thien – Hue Prov., Nam Dong Distr., Huong Son Municipality, around point 16°10'22''N, 107°36'24''E. Fractionally logged primary closed broad-leaved evergreen lowland forest along La Ma River on very steep hill slopes composed with clayey shale and sandstone at elevation about 300 m a.s.l. Epiphyte on mossy tall trees along rocky stream valley. Flowers odorless, tepals white with light violet tint, lip bright yellow with white or very light violet apex. Occasional.