1 Research and Collections Center, Illinois State Museum, 1011 East Ash Street, Springfield, IL 62703, USA 2 Key Laboratory for Plant Biodiversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
*Correspondence address. Tao Deng, Key Laboratory for Plant Biodiversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China. Tel: +86-871-65239856; Fax: +86-871-65223223; E-mail: dengtao@mail.kib.ac.cn; or Hong Qian, Research and Collections Center, Illinois State Museum, 1011 East Ash Street, Springfield, IL 62703, USA. Tel: +1-217-782-2621; Fax: +1-217-785-2857; E-mail: hqian@museum.state.il.us
†These authors contributed equally to this work.