Lai Chau Prov., Sin Ho Distr., Ta Ngao Municipality, Hai Ho village, around point 22°21′34″N 103°15′02″E.
Secondary forest and shrubs on foothills of remnant hills and mountains composed with stratified solid gray highly eroded limestone at elev. about 1500 m a.s.l.
Shrub 1-2 m tall. Flowers white with purple tint. Locally very common.
HAL 9993 19 Nov. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.