Vietnam, Ha Giang Prov., Meo Vac Distr, Pa Vi Municipality, vicinities of Pa Vi Thuong village around point 23º11’05’’N, 105º24’04’’E at elevation about 1450 m a.s.l. Highly degraded remnants of coniferous forest with Pseudotsuga sinensis on very steep rocky slopes and along tops of rocky remnant ridges composed with highly eroded marble-like limestone. Creeping lithophyte and epiphyte on very steep rocky mossy slope. Flowers white, purple striped. Very common.