Yulania biondii was classified,settled and studied systematically.Based on the related regulations of International Code of Botanical Nomenclature,International Code of Nomenclature for Cultivated Plants and the morphological characteristics of Y.biondii,it was reported that the variety included 6 cultivar groups(including one original cultivar group,3 newly-combined cultivar groups,2 new groups) and 24 cultivars(including one original cultivar,6 new cultivars,17 new combined cultivars) for the first time.A...