N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Thanh Son Municipality, E macroslope of Pu Luong range around point 20°29′38′'N, 105°06′36′'E at elev. 600 m a.s.l. (Pha Noi pass). Secondary evergreen shrubs on shale soil. Evergreen tree up to 25 m tall and 0.4-0.6 m in diam. Flowers white, very fragrant. Bee pollinated. Rare.