Richard K. Rabeler,^1,* Harlan T. Svoboda,^2,3 Barbara Thiers,⁴ L. Alan Prather,⁵ James A. Macklin,⁶ Laura P. Lagomarsino,⁷ Lucas C. Majure,^8,9 Carolyn J. Ferguson<sup>10

1</sup>1Herbarium, Ecology and Evolutionary Biology, University of Michigan, 3600 Varsity Drive, Ann Arbor,
²2Department of Environmental and Plant Biology, Ohio University, 315 Porter Hall, Athens, Ohio 45701
³3Present address: U.S. National Arboretum, USDA-ARS, 3501NewYork Avenue NE, Washington, District of
⁴4William and Lynda Steere Herbarium, New York Botanical Garden, 2900 Southern Boulevard, Bronx, New
⁵5Herbarium, Department of Plant Biology, Michigan State University, 612 Wilson Road, East Lansing, M
⁶6Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario K1A 0C6, Canada; james.mackli
⁷7Shirley C. Tucker Herbarium, Department of Biological Sciences, Louisiana State University, 202 Lif
⁸8Department of Research, Conservation and Collections, Desert Botanical Garden, 1201 North Galvin Pa
⁹9Present address: Florida Museum of Natural History, University of Florida, 379 Dickinson Hall, Gain
¹⁰10Herbarium, Division of Biology, Kansas State University, 116 Ackert Hall, Manhattan, Kansas 66506,

^*Author for correspondence (rabeler@umich.edu)