Microscopic observation on mycorrhiza of rare herb Dysosma versipellis Study on tissue culture of Dysosma versipellis Chemical constituents from Dysosma versipellis Flavonoid glycosides from callus cultures of Dysosma versipellis Chemical constituents from Dysosma versipellis The development of megasporogenesis and the formation of female gametophyte in Dysosma versipellis THE GENESIS OF MICROSPORE AND THE FORMATION OF MALE GAMETOPHYTE IN DYSOSMA VERSIPELLIS(HANCE)M.CHENG Ecological and Biological Characteristics of Endangered Medicinal Plant Dysosma versipellis