The Observation on Floral Organs of an Alien Species, Flaveria bidentis (L.) Kuntze Notes on the genus Elatostema(Urticaceae) Behind the diversity: Ontogenies of radiate, disciform, and discoid capitula of Chrysanthemum and its allies Evaluation on cold and hot characteristics of dried capitulum of Chrysanthemum indicum by two cellular models Evaluation on cold and hot characteristics of dried capitulum of Chrysanthemum indicum by two cellular models Notes on the genus Elatostema(Urticaceae) Factors Influencing Seed Production in Ligularia virgaureaⅠ. Habitat and Architecture of Inflorescence