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. Lithophytic forb up to 0.4 m hg on shady mossy cliffs. Flowers greenish with reddish tint. Common.
NTH 3288 05 Oct. 1999
Collectors: N.T. Hiep, N.Q. Binh, L. Averyanov, P. Cribb.