1. Department of Botany University of Wisconsin 430 Lincoln Drive Madison Wisconsin 53704 USA
2. Department of Ecosystem Science and Management Texas A&M University 2138 TAMU College Station Texas 77843 USA
3. Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education College of Life Sciences Zhejiang University Hangzhou 310058 China
4. New York Botanical Garden 2900 Southern Blvd. Bronx New York 10485
5. Department of Biology University of Nebraska‐Kearney 2401 11th Avenue Kearney Nebraska 68849 USA