Northern Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen Ha municipality, in the vicinity of Na Nheo village (around point 21°59′38′'N, 104°16′40′'E). Old secondary open broad-leaved evergreen submontane forest with bamboo on very steep granite and quartzite slopes of mountain river canyon at elev. about 660 m a.s.l. Shrub about 1.5 m hg. Flowers white with violet tint. Not common.