Vietnam, Ha Giang Prov., Meo Vac Distr, Sung Tra Municipality, vicinities of Ta Cha Lang village around point 23°10’12’’N, 105°17’39’’E at elevation about 1100-1150 m a.s.l. Remnants of primary coniferous forest with Pseudotsuga sinensis on tops of high rocky remnant ridge composed with highly eroded marble-like limestone.