• Robert Naczi, New York Botanical Garden
• Robert Magill, Missouri Botanical Garden
• Richard Rabeler, University of Michigan
• Melissa Tulig, New York Botanical Garden
• Kim Watson, New York Botanical Garden
• Mari Roberts, New York Botanical Garden
• Barbara Thiers, New York Botanical Garden
• Margaret Hanes, Eastern Michigan University
• Loy Phillippe, Illinois Natural History Survey
• Deborah Lewis, Iowa State University
• Michael Vincent, Miami University
• Timothy Hogan, University of Colorado
•  Mary Ann Feist, University of Illinois
•  Craig Freeman, University of Kansas
•  Christopher Campbell, University of Maine
•  Anita Cholewa, University of Minnesota
•  Beryl Simpson, University of Texas
•  Kenneth Cameron, University of Wisconsin

Data Contributors

•  Consortium of Pacific Northwest Herbaria
•  Consortium of California Herbaria
•  Southwest Biodiversity Consortium
•  Canadian National Collection, Ottowa
•  University of California, Davis
•  Kansas State University

•  Randall Schuh, American Museum of Natural History
•  Christine Johnson, American Museum of Natural History
•  Katja Seltmann, American Museum of Natural History
•  Matthew Wallace, East Stroudsburg University of Pennsylvania
•  Michael Schwartz, Canadian National Collection
•  Christiane Weirauch, University of California, Riverside
•  John Heraty, University of California, Riverside
•  Charles Bartlett, University of Delaware
•  Benjamin Normark, University of Massachusetts, Amherst
•  John Pickering, Discover Life
•  Neal Evenhuis, BP Bishop Museum, Honolulu
•  David Kavanaugh, California Academy of Sciences
•  Stephen D. Gaimari ,California Dept. Food and Agriculture
•  Chen Young, Carnegie Museum, Pittsburgh
•  Boris C. Kondratieff, Colorado State University
•  James K. Liebherr, Cornell University
•  Dmitry Dmitriev, Illinois Natural History Survey
•  Richard Brown, Mississippi State University
•  Bob Blinn, North Carolina State University
•  David Maddison, Oregon State University
•  Christopher Marshall, Oregon State University
•  John Oswald, Texas A&M University
•  Kipling Will, University of California, Berkeley
•  Caroline Chaboo , University of Kansas
•  Michael Sharkey , University of Kentucky