N. Vietnam, Ha Giang prov., Quan Ba distr., Can Ti municipality, vicinities of Sing Xuoi Ho village (N 23°04′ E 104°59′), 26.2 km to 002° of Ha Giang city. Primary closed evergreen mixed wet mossy forest (with Cupressus, Taxus, Nagea and Pseoudotsuga) along tops of karst remnant limestone ridge at elev. 1100-1150 m a.s.l. Lithophytic forb on mossy shady rocks. Flowers white or pale pinkish. Leaves green, below with pink tint and pink venations, petiole reddish. Very common, locally abundant.
NTH 3599 12 Oct. 1999
Collectors: N.T. Hiep, N.Q. Binh, L. Averyanov, P. Cribb.