Cao Bang Prov., Nguyen Binh Distr., Yen Lac Municipality, Chi Doi village, around point 22°45′34″N, 105°51′48.7″E.
Primary fractionaly logged coniferous forest with Pseudotsuga sinensis along highly eroded rocky limestone ridge at elevation about 1400 m a.s.l.
Lithophytic herb on shady cliffs on miffle part of mountain slope. Leaves dark green above, light green with purple veins below. Flowers pink, anthers yellow. Very common.