Vietnam, Quang Tri Prov., Huong Hoa Distr., Huong Phung Municipality, vicinities of Sa Mui pass, around point 16°46′49″N 106°35′28″E at elevation about 650-750 m a.s.l.
Primary broad-leaved evergreen submontane forest along rocky river valley on shale rocks.
Treelet about 5 m tall. Not common.
HLF 6527 1 April 2006.
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.