FLORA OF VIETNAM Orchidaceae Thrixspermum annamense (Guillaumin) Garay
Vietnam, Thua Thien – Hue Prov., Huong Thuy Distr., Duong Hoa Municipality, Huong Thuy forest enterprise territory, around point 16°13′23′'N, 107°35′16′'E, SW slopes of Mang Chan ridge at elevation about 350-500 m a.s.l.
Fractionally logged primary closed evergreen broad-leaved forest along steep stream slopes composed with shale with quartzite.
Canopy epiphyte on mossy trees along rocky stream canyon. Flower buds white. Locally very common.