Thua Thien – Hue Prov., Nam Dong Distr., Thuong Lo Municipality, along Cha Mang stream, around point 16°07′57″N 107°44′16″E.
Primary evergreen broad-leaved lowland forest on very steep hill slopes and along mountain ridge composed with stratified shale and sandstone at elev. about 450-550 m a.s.l.
Tree up to 10 m tall along ridge. Flower buds white with blue tint. Common.
HAL 10927 5 Apr. 2007. Coll.: L.Averyanov, Phan Ke Loc, A.Averyanova, N.D.Phuong, L.V.Hung.