Bolboschoenus (Ascherson) Palla (Cyperaceae) from Pliocene of China Chemical constituents and activities of total flavonoids from Yushen Tang Species Diversity of Rare Plant Dipentodon sinicus Communities in Yushe National Forest Park Verification on hypothesis for optimum ratio in various active constituents of Chinese materia medica with desired effects Research Highlights of the Vegetation, Climate and Atmospheric CO2 in Yushe Basin, Shanxi, North China During the Plio-Pleistocene Transition