Zelkova serrata
As of 2005, its National Champion trees were "Cladrastis kentukea" and "Halesia diptera"; its State Champion trees included "Abies cilicica", "Abies koreana", "Cedrus libani", "Chionanthus virginicus", "Eucommia ulmoides", "Halesia parvifolia", "Metasequoia glyptostroboides", "Phellodendron amurense", "Picea orientalis", "Picea polita", "Pinus flexilis", "Pinus griffithi", "Pinus monticola", "Quercus cerris", "Quercus nigra", "Taxodium distichum", "Ulmus serotina", and "Zelkova serrata".