XVI International Botanical Congess

The Phylogeny of 28 species of 18 genera, representing all tribes and subtribes of Hamamelidioideae (sensu Endress), was constructed based on nrDNA ITS sequences using parsimony, neighbor-joining, maximum likelihood methods. 3 main clades were strongly supported. Combined with the available data on wood anatomy, floral morphology and vascular anatomy, vegetation morphology, and geographical distribution, exine structure etc., 3 tribes could be recognized: 1) Loropetaleae Zhang. tribe. nov. : Corylopsis, Maingaya, Matudeae, Embolanthera, Tetrathyrium and Loropetalum, 2) Dicorypheae Zhang. tribe. nov.: Dicoryphe, Trichocladus, Neostrearia, Ostrearia, Noadendron, Eustigma, Fortunearia, Sinowilsonia and Molinadendron, 3) Hamamelideae A. D. : Fothergilla, Hamamelis, Parrotiopsis, Distylium, Distyliopsis, Sycopsis, Parrotia and Shaniodendron.