N. Vietnam, Tuyen Quang prov., Na Hang distr., Thanh Tuong municipality, near Ban Bung village (22°16′26′'N, 105°25′58′'E). Primary broad-leaved evergreen wet forest on very steep limestone/shale slope of mountain stream canyon at elev. 300-450 m a.s.l. Terrestrial herb on very steep open slope. Inflorescence stalk and petiole light green. Spathe yellowish-green with light violet-pink tint, female flowers green with brown-purple stigmas, male flowers white, apex of inflorescence light yellowish. Not common.