N. Vietnam, Bac Can prov., Ba Be distr., Nam Mau municipality, near Hua Tang village, Ba Be national park (22°27′10′'N, 105°34′29′'E). Primary dry broad-leaved evergreen forest (with Burettiodendron hsienmu as a main dominant) on very steep slopes of remnant highly eroded limestone ridge at elev. 500-600 m a.s.l. Lithophyte herb in crevices of vertical shady cliffs. Leaves light green with irregular white palmate arranged spots above, pure light green below. Flowers light pink, anthers yellow. Very common.