N. Vietnam, prov. Ha Giang, distr. Meo Vac, municipality Sung Chang, vicinities of Lu Lu Phin village (N 23°11′ E 105°18′). Secondary open broadleaved forest on steep slopes and bluffs of karst remnant limestone ridge at 1300-1350 m elev. Terrestrial herb in shady places. Flowers light violet. Not rare.
CBL 1819 29 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)