Lai Chau Prov., Sin Ho Distr., Ma Quai Municipality, Can Ti 2 village, around point 22°24′18″N 103°22′45″E.
Remnants of broad-leaved evergreen closed primary and secondary forest on steep mountain slopes composed with sandstone and limestone at elev. about 1200 m a.s.l.
Terrestrial and lithophytic shrub 2-3 m tall rocky slopes. Flowers light pinl-violet. Common.
HAL 9790 16 Nov. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.