A cytogenetic study of five species in the genus Osmunda Development of SSR Markers to Assess Genetic Diversity in Osmunda japonica Thunb. Pharmacognostical Studies on the Chinese Drug Guanzhong Produced in East China In vitro Antibacterial Activities Extracts from Four Plants Used as Traditional Chinese Medicine Guanzhong Age estimation and age structure of Osmunda japonica population Phylogenetic Position and Genetic Relationship of Osmunda mildei(Osmundaceae):Evidence from rbcL Gene and trnL-trnF Region Ultrastructure of Oogenesis in Osmunda cinnamomea var. asiatica Pharmacognostical Studies on the Chinese Drug Guanzhong Produced in Middle-South China Karyotype analysis of five species in Osmunda (Osmundaceae) STUDY ON THE MORPHOLOGY AND DEVELOPMENT OF THE ARCHEGONIUM AND ANTHERIDIUM OF THE FERN OSMUNDA CINNAMOMEA Studies on the Rapid Propagate of the Osmunda japonica Thund. Studies on the Rapid Propagate of the Osmunda japonica Thund. Characteristics of Osmunda vachellii Communities and Species Diversity from Mount Maluanshan in Shenzhen Paleocene Wuyun flora in Northeast China: Woodwardia bureiensis, Dryopteris sp. and Osmunda sachalinensis