N. Vietnam, Ha Giang prov., Meo Vac distr., Shung Cha municipality, vicinities of Lo Loi Phin village (N 23°11′ E 105°17′). Wet secondary mossy forest near the top of remnant karst limestone ridge at elev. 1250 m a.s.l. Terrestrial forb up to 1.5 m hg in open mossy places. Flowers white. Locally common.
NTH 3292 05 Oct. 1999
Collectors: N.T. Hiep, N.Q. Binh, L. Averyanov, P. Cribb.