Robert L. Allen
Adjunct professor of biology, Santa Ana College and Irvine Valley College, Orange County, California.

Adriana Otero Arnaiz
Researcher, Instituto de Ecologia, UNAM, Morelia, Mexico.

Vanessa E. T. M. Ashworth
Postdoctoral fellow, Michael Clegg Laboratory, University of California, Irvine; editor-in-chief for scientific publications, Rancho Santa Ana Botanic Garden, Claremont, California.

Hester L. Bell
Independent research–chloridoid grasses; Rancho Santa Ana Botanic Garden, Claremont, California.

Edward G. Bobich
Assistant professor of biology, California State Polytechnic University, Pomona

David L. Boose
Assistant professor of biology, Gonzaga University, Spokane, Washington.

David E. Bramlet
Independent consulting biologist.  Santa Ana, California

Clyde L. Calvin
Professor emeritus of biology, Portland State University, Oregon.

Jenny M. Cruse-Sanders
Assistant professor of biology, Salem College, Winton-Salem, North Carolina.

Paul A Fryxell
Adjunct professor, integrative biology, University of Texas, Austin; research botanist (ret.), Agricultural Research Service, U.S.D.A.; honorary curator, The New York Botanical Garden.

Dylan P. Hannon
Curator of The Rose Hills Foundation Conservatory for Botanical Science and tropical collections, Huntington Botanical Gardens, San Marino, California.

Michael Honer
Independent botanical consultant, Goleta, California.

Leigh A. Johnson
Associate professor of biology, herbarium curator, Stanley L. Welsh Herbarium at the M. L. Bean Museum, Brigham Young University, Provo, Utah.

Jon E. Keeley
Research ecologist, U.S. Department of the Interior, U.S. Geological Survey, Western Ecological Research Center, Sequoia and Kings Canyon Field Station, Three Rivers, California.

Shawn E. Krosnick
Postdoctoral fellow, Rancho Santa Ana Botanic Garden, Claremont, California.

Tasha LaDoux
Administrative director, Sweeney Granite Mountains Desert Research Center, University of California Natural Reserve System; botanist, Joshua Tree National Park, California.

Simon T. Malcomber
Assistant professor of biological sciences, California State University, Long Beach, California.

Orlando Mistretta
Private botanical consultant, Upland, California.

Douglas S. Moore
Independent researcher: identification of Miocene petrified woods found in southern California; professional firefighter, Federal Fire Department, Long Beach Naval Shipyard, California.

Adriana Otero Arnaiz
Instituto de Ecologia, UNAM, Morelia, Mexico.

Paul M. Peterson
Curator of grasses, Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, D.C.

Jason Price
Science and electronic resources librarian, Libraries of the Claremont Colleges, Claremont, California.

Richard E. Riefner, Jr.
Consulting and research biologist / botanist, wetlands and habitat restoration specialist, Rancho Santa Marguerita, California

Eric H. Roalson
Associate Professor of Biological Sciences, Washington State University, Pullman. 

Fred M. Roberts, Jr.
Independent Botanical Survey Consultant.

Andrew C. Sanders
Herbarium curator, Department of Botany & Plant Sciences, University of California, Riverside.

Victor Steinmann
Investigador asociado, Instituto de Ecología, Centro Regional del Bajío, Pátzcuaro, Michoacán, México.

Gary D. Wallace
Botanist, U.S. Fish and Wildlife Service, Carlsbad, California.

Scott D. White
Principal, Scott White Bioservices, Ontario, California.

Kimberlyn Williams
Associate professor of biology, California State University, San Bernardino.

Kenneth A. Wilson
Professor emeritus of biology, California State University, Northridge.

Elizabeth Anne Zimmer
Principal investigator / research biologist, Department of Botany, Laboratories of Analytical Biology, National Museum of Natural History, Smithsonian Institution, Suitland, Maryland.