1. Department of Biology, West Virginia University
2. Department of Biological Sciences, University of Alabama
3. Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, PR China
4. Department of Biological and Environmental Sciences, University of Gothenburg, Sweden
5. Gothenburg Global Biodiversity Centre, Göteborg, Sweden
6. Royal Botanical Gardens Kew, Richmond, United Kingdom