N. Vietnam, Ha Giang prov., Meo Vac distr., Shung Cha municipality, vicinities of Lo Loi Phin village (N 23°11′ E 105°17′). Coniferous primary mossy forest with domination of Pseudotsuga brevifolia along tops of remnant limestone karst ridge at elev 1200-1250 m a.s.l. Shrub 1-1.5 m hg on open mossy rocks. Flowers white. Common.
NTH 3321 05 Oct. 1999
Collectors: N.T. Hiep, N.Q. Binh, L. Averyanov, P. Cribb.