KARYOMORPHOLOGY OF TUSSILAGO L. (ASTERACEAE:SENECIONEAE) AND ITS SYSTEMATIC SIGNIFICANCE POLLEN WALL ULTRASTRUCTURES OF THE SUBTRIBE TUSSILAGININAE (ASTERACEAE: SENECIONEAE) OF THE EASTERN ASIA AND THEIR SYSTEMATIC AND TAXONOMIC SIGNIFICANCE A STUDY ON POLLEN MORPHOLOGY OF TRIBE SENECIONEAE IN XINJIANG One new lignan glycoside from whole plants of Senecio chrysanthemoides The New Species of the Tribe Senecioneae (Compositae) from China (II) Karyomorphology of Farfugium japonicum (Asteraceae:Senecioneae) and its systematic implication Karyomorphology of Ligulariopsis Y. L. Chen (Asteraceae: Senecioneae) The New Speciets of the Tribe Senecioneae (Compositae) from China FLORAL MICROCHARACTERS OF THE SUBTRIBE TUSSILAGININAE(ASTERACEAE:SENECIONEAE) OF THE EASTERN ASIA AND THEIR SYSTEMATIC AND TAXONOMIC SIGNIFICANCE Eight New Species of the Tribe Senecioneae (Compositae) from China Taxonomic Studies on the Genus Ligularia Cass. (Asteraceae, Senecioneae) from China (IV): The Identities of L. kangtingensis and Senecio ficariifolius The Identity of Synotis cordifolia (Asteraceae-Senecioneae) The Identity of Senecio daochengensis (Asteraceae-Senecioneae) Taxonomic Studies on the Genus Ligularia Cass. (Asteraceae, Senecioneae) from China (Ⅲ): The Identities of L. brassicoides, L. ianthochaeta, and L. paradoxa var. palmatifida The pollen characteristics under SEM in Farfugium and Ligulariopsis and their taxonomic significane Taxonomic Studies on the Genus Ligularia Cass. (Asteraceae, Senecioneae) from China (II): The Identity of L. fangiana Taxonomic Studies on the Genus Ligularia Cass. (Asteraceae, Senecioneae) from China (I): The Identity of L. angustiligulata