W. J.  Zheng ? Fu, L. G., ??????, "Clone of Flora of China ", Beijing: Science PressBeijing: Science Press, ??. 321, ? 329, 1978.

W. J.  Zheng ? Fu, L. G., ??????, "Clone of Flora of China ", Beijing: Science PressBeijing: Science Press, ??. 321, ? 329, 1978.