Vietnam, Quang Binh Prov., Quang Ninh Distr., Truong Son municipality, around Chan Trong village at 17°10′49″N 106°29′22″E.
Secondary dry broad-leaved forest on steep slopes of highly eroded karst limestone hills composed with gray solid marble limestone along Long Dai River, at elevation about 30 m a.s.l.
Treelet 3-5 m tall. Flower light pink. Common.
HAL 11547 13 April 2008 photo Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, N.S.Khang