1. Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331
2. Department of Biology, Duke University, Box 90338, Durham, North Carolina 27708
3. Department of Botany, Field Museum of Natural History, Chicago, Illinois 60605
4. ABL Herbarium, G.V.D. Veenstraat 107, NL-3762 XK Soest, The Netherlands
5. Chemin des Vignes vieilles, FR - 84120 MIRABEAU, France
6. Illinois Natural History Survey, Center for Biodiversity, Champaign, Illinois 61820
7. Department of Plant Pathology, Pennsylvania State University, University Park, Pennsylvania 16802
8. Institut für Botanik, Karl-Franzens-Universität, Holteigasse 6, A-8010, Graz, Austria
9. Department of Biology, University of Oslo, P.O. Box 1066 Blindern, NO-0316 Oslo, Norway
10. Department of Plant Sciences, University of Arizona, Tucson, Arizona 85721
11. Department of Biology, University of Kaiserslautern, Kaiserslautern, Germany
12. Harvard University Herbaria, Harvard University, Cambridge, Massachusetts 02138
13. Department of Botany, Brandon University, Brandon, Manitoba, Canada
14. 2017 Thure Avenue, St Paul, Minnesota 55116
15. Swiss Federal Institute for Forest, Snow and Landscape Research, WSL Zürcherstr. 111CH-8903 Birmensdorf, Switzerland
16. Biozentrum Klein Flottbek und Botanischer Garten der Universität Hamburg, Systematik der Pflanzen Ohnhorststr. 18, D-22609 Hamburg, Germany
17. Botanischer Garten und Botanisches Museum Berlin-Dahlem, Freie Universität Berlin, Königin-Luise-Straße 6-8, D-14195 Berlin, Germany