1. Department of Plant Biology, University of Minnesota, St. Paul, Minnesota 55108 USA;
2. Brooklyn Botanic Garden, Brooklyn, New York 11225‐1099 USA;
3. Department of Plant Biology, Southern Illinois University, Carbondale, Illinois 62901 USA;
4. Department of Biology, The Pennsylvania State University, University Park, Pennsylvania 16802 USA;
5. Institut de recherche en biologie végétale, Université de Montréal, 4101 Sherbrooke East, Montréal, Quebec H1X 2B2 Canada;
6. Bergius Foundation, Royal Swedish Academy of Sciences, 50017, SE‐104 05, Stockholm, Sweden;
7. Biology Department, Ithaca College, Ithaca, New York 14850 USA