N.Vietnam, Bac Kan Prov., Na Ri Distr., Liem Thuy Municipality, village Na Bo, around point 21є56'44''N, 106є05'09''E, at elevation 300-700 m a.s.l. Primary broad-leaved evergreen closed wet forest on very steep slopes and cliffs of rocky ridges and mesae composed with white solid marble-like crystalline limestone.
Lithophytic herb on open mossy vertical cliffs. Leaves light green with white stripes along main nerves. Locally common.