Vietnam, Quang Tri Prov., Huong Hoa Distr., Huong Phung Municipality, Sa Mui pass, around point 16°48′36″N 106°34′44″E at elevation about 1400-1500 m a.s.l.
Primary broad-leaved evergreen submontane forest on very steep rocky shale southern slopes of Sa Mui Mountain.
Shrub 3-4 m tall on ridge top at elevation about 1500 m a.s.l. Flowers light pink. Not common.
HLF 5816 29 March 2006. Photo.
Coll. N.T.Hiep, L.Averyanov, P.K.Loc, P.V.The, N.S.Khang, P.H.Duc, L.T.Son, S.Bounphanmy, T.K.Ratana, O.Sonliya, T.Q.Dang, N.V.Hien, H.T.N.Trang, L.T.Chau. Grant from Henry Luce Foundation.