Vietnam, Ha Giang Prov., Meo Vac Distr, Pai Lung Municipality, around point 23є15’06’’N, 105є22’02’’E at elevation about 1300 m a.s.l.
Highly degraded remnants of coniferous forest with Pseudotsuga sinensis and Tsuga chinensis on very steep rocky slopes and along tops of rocky remnant ridges composed with highly eroded marble-like limestone.
Terrestrial and lithophytic creeping herb on very steep rocky mossy slope. Flowers white, lip with two light green spots at the center. Not rare.