Vietnam, Ha Giang Prov., Meo Vac Distr, Pai Lung Municipality, around point 23°15′06″N, 105°22′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 shrub 1-1.5 m tall on very steep rocky mossy slope. Flowers violet. Very common.