N. Vietnam, Tuyen Quang prov., Na Hang distr., Xuan Tam municipality, near Ban Cai village (22°29′18′'N, 105°19′47′'E). Primary broad-leaved evergreen wet forest on alluvial foothills of highly eroded remnant limestone ridge at elev. 350-400 m a.s.l. Terrestrial herb on wet shady rocky place. Leaves deep green with bright white spots above, light green with deep purple-violet venation below. Not common. HAL 233 22 March 2001