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 herb on shady rocky slope. Male flowers light pink-purple to nearly white, female flowers pink-purple. Locally very common.
HAL 9843 16 Nov. 2006 DNI fix. Photo. Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.