S. Vietnam, Kontum Prov., Kon Plong Distr., Hieu Municipality, Mang La forest enterprise (14°39′N, 108°25′E). Primary broad-leaved closed evergreen wet mountain forest on sandstone steep slopes of forest river at elev. 1100-1200 m. Terrestrial herb in shady places along stream. Leaves above deep green, below light green. Not rare.
VH 5605 23.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)