Författare: Robert Patterson

Bruce G. Baldwin is Curator of the Jepson Herbarium and Professor of Integrative Biology at the University of California, Berkeley. Douglas H. Goldman is Herbarium Associate at the Harvard University Herbaria. David J. Keil is Professor Emeritus and Director of the Robert F. Hoover Herbarium at California Polytechnic State University, San Luis Obispo.Robert W. Patterson is Professor of Biology at San Francisco State University. Thomas J. Rosatti is Specialist at the University and Jepson Herbaria, University of California, Berkeley. Dieter H. Wilken is Director of Conservation at the Santa Barbara Botanic Garden.