New Taxa of the Genus Bergenia from Hengduan Mountains Pollination Biology and Mating System of Bergenia scopulosa T.P.Wang,an Endangered,Indigenous Species in China Comparative studies on content of arbutin, bergenin and catechin in different part of Bergenia purpurascens and B. crassifolia Chemical constituents from rhizomes of Bergenia scopulosa (II) Comparison of arbutin contents from Bergenia purpurascens in Yunnan A Conspectus of the Genus Bergenia Moench Bergenin HPLC Determination of Two Species of Bergenia growing in Tibet Advances in studies on resources for medicinal source plants with bergenin Research on growth state and physiological changes of Tianquan Bergenia purpurascens under different shade conditions