Two Newly Recorded Species of Dischidia (Asclepiadaceae) from China Pollinarium Morphology of Seven Marsdenieae Genera(Asclepiadaceae) Distribution of C(21) steroidal glycosides in plants of Asclepiadaceae and their pharmacological activities Pollinarium Morphology of 12 Species of Cynanchum(Asclepiadaceae) COMPARATIVE REVIEW ON ASCLEPIADACEAE IN FLORA REIPUBLICAE POPULARI SINICAE AND FLORA OF CHINA Advances in studies on C21 steroidal glycosides of plants in Asclepiadaceae Ceropegia Linn.(Asclepiadaceae)——A Newly Recorded Genus of Shaanxi Pollinarium Morphology of 17 Species and 1 Subspecies of Cynanchum(Asclepiadaceae) Cynanchum forrestii var.conduplicatum (Asclepiadaceae) A New Variety from Yunnan and Sichuan,China Studies on Chemical Constituents of Stelmatocrypton khasianum (Benth.) H. Bail. The Structure of Dresgenin from Dregea sinensis var. Corrugata Sarcostemma R.Br., a newly recorded genus of Asclepiadaceae from Guangxi Studies on Chemical constituents from root of Cynanchum atratum Pollinaria Morphology of Tylophora (Asclepiadaceae) New C21 Steroidal Glycosides from Marsdenia tenacissima