S. Vietnam, Kontum Prov., Sa Thay Distr., Sa Son Municipality, Chu Mom Ray nature reserve (14°25′N, 107°44′E). Primary wet broad-leaved closed evergreen mountain forest on granites at elev. 700-900 m. Terrestrial herb up to 3 m hg in open wet place along stream. Flowers white. Very common.
VH 5790 28 04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)