N.Vietnam, Thanh Hoa Prov., Ba Thuoc Distr., Lam Xa Municipality, Lang Trang village, around point 20º20'02''N, 105º12'39''E. Remnants of primary broad-leaved evergreen seasonal forest along rocky tops of remnant mountains composed with solid crystalline marble-like highly eroded limestone at elev. 500-550 m a.s.l. Terrestrial. Occasional.