1. College of Horticulture, Jinling Institute of Technology, Nanjing 211169, China
2. College of Forestry, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
3. College of Horticulture, Jinling Institute of Technology, Nanjing 211169, China; State University of New York at Cobleskill, Cobleskill, NY 12043, USA
4. Department of Horticulture, University of Georgia, Athens, GA 30602, USA
5. Secrest Welcome & Education Center, Secrest Arboretum, The Ohio State University, Wooster, OH 44691, USA
6. Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China
7. College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045, China