Cao Bang Prov., Nguyen Binh Distr., Ca Thanh Municipality, Ta Pin village, around point 22°43'56.4"N, 105°51'16.4"E.
Primary coniferous forest with Pseudotsuga sinensis along highly eroded rocky limestone ridge at elevation about 1400 m a.s.l. Erect lithophytic herb to 20 cm tall on open mossy rocks along ridge. Flowers light blue. Very cmmon.