1. Department of Biology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 USA;
2. Botanisches Institut, Friedrich‐Wilhelms‐Universität Bonn, Meckenheimer Allee 170, 53115 Bonn, Germany;
3. School of Biological Sciences, Washington State University, Pullman, Washington 99164 USA;
4. Florida Museum of Natural History and the Genetics Institute, University of Florida, Gainesville, Florida 32611 USA;
5. Molecular Systematics Section, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK;
6. Department of Biology, Western Kentucky University, Bowling Green, Kentucky 42101 USA;
7. Biology Department, Acadia University, 24 University Avenue, Wolfville, Nova Scotia, Box 1X0, Canada;
8. Muséum National d'Histoire Naturelle, 16, rue Buffon, 75005 Paris, France;
9. Institut für Botanik, Zellescher Weg 22, 01062 Dresden, Germany;
10. Institut für Allgemeine Botanik, Universität Hamburg, Ohnhorststr. 18, 22609 Hamburg, Germany;
11. Department of Biological Sciences, University of Maine, Orono, Maine 04469‐5722 USA; and
12. National Herbarium of the Netherlands, Utrecht University Branch, Heidelberglaan 2, 3584 CS Utrecht, Netherlands