S Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, S slope of Bach Ma Mt. below Hai Vong Dai peak, around the point 16°11'11 N, 107°50'57 E at elev. about 1050 m a.s.l. Mixed and broad-leaved evergreen dry secondary montane forest on very steep shale/sandstone slopes. On shady stream slope.