California plant floras and field guides to help in your plant exploration and identification
Statewide Books and Resources
The Jepson Manual: Higher Plants of California James C. Hickman (Editor) The 2nd edition is now out in print. It includes significant revisions to plant families, genera and species.
Jepson eFlora is the revised version (2nd edition) of the Jepson Manual online. It will be updated on a regular basis: http://ucjeps.berkeley.edu/IJM.html
CalFlora database if you’re looking in a place that isn’t otherwise covered it’s quite useful: http://www.calflora.org/
Calphotos a photo data base of California plants: http://calphotos.berkeley.edu/flora/
Trees and Shrubs of California by John D. Stuart and John O. Sawyer
Pacific States Wildflowers (Peterson Field Guide) Thomas F. Niehaus and Charles L. Ripper
Regional Books from North to South
Pocket Flora of the Redwood Forest Rudolof W. Becking
Redwood Region Flower Finder Phoebe Watts
Northwest California: A Natural History John O. Sawyer
A Flora of the Trinity Alps William J. Ferlatte
A Flora of Lassen Volcanic National Park, California George Gillett, John Thomas Howell and Hans Leschke. Revised by Vernon H. Oswald, David W. Showers and Mary Ann Showers
A Flora of Vascular Plants of Mendocino County, California Gladys L. Smith and Clare R. Wheeler
Wildflower Walking in Lakes Basin of Northern Sierra by Toni Fauver
A Sierra Nevada Flora Norman F. Weeden
Plants of the Tahoe Basin Michael Graf
An Illustrated Flora of Yosemite National Park Stephen J. Botti (Author), Walter Sydoriak (Illustrator)
Sierra Flower Finder Glen Keator
Sierra Nevada Wildflowers Elizabeth Horn
Wildflowers of the Sierra Nevada and the Central Valley Laird R. Blackwell
Flora of the Yosemite Sierra by Dean Wm. Taylor (Tuolumne, Mariposa and Madera Counties and Mono Basin)
Wildflower Hotspots of the Eastern Sierra (locations, plant lists and resources) http://www.fs.fed.us/wildflowers/regions/pacificsouthwest/documents/WildflowerHotSpots050411LowRes.pdf (slow download as it is long and includes photos) Available in print Eastern Sierra Visitors Centers.
Natural History of the White-Inyo Range: Eastern California edited by Clarence A. Hall Jr.
Wildflowers of the Eastern Sierra and adjourning Mojave Desert and Great Basin Laird R. Blackwell
Wildflower Walks and Roads of the Sierra Gold Country by Toni Fauver
Wildflowers of Nevada and Placer Counties, California by Redbud Chapter of CNPS
The Natural History of Big Sur Paul Henson and Donald J. Usner
Wildflowers of Table Mountain Butte County, California - 2 nd edition Samantha Mackey (author) and Albin Bills (author), Larry Jansen (Illustrator)
A Flora of Sonoma County Catherine Best
Marin Flora – An Illustrated Manual of the Flowering Plants, Ferns, and Conifers of Marin John Thomas Howell (Author), Frank Almeda (Author), Wilma Follette (Author), Catherine Best (Author)
Plants of the San Francisco Bay Region: Mendocino to Monterey, Revised Edition Linda Beidleman (Author), Eugene Kozloff (Author)
Annotated Checklist of the East Bay Flora Barbara Ertter
Plants of the East Bay Parks Glen Keator (author) Susan Bazell(illustrator) and Peg Steunenberg (illustrator)
The Flowering Plants and Ferns of Mount Diablo California Barbara Ertter and Mary L. Bowerman
Flora of the Mount Hamilton Range of California Helen K. Sharsmith
Flowering Plants of Edgewood Natural Preserve Toni Corelli
Flora of the Santa Cruz Mountains J. H. Thomas
An Illustrated Field Key to the Flowering Plants of Monterey County and Ferns, Fern Allies, and Conifers Mary Ann Matthews (Author)
Wildflowers of Monterey County by David J. Gubernick (photographer) and Vern Yadon (botanist)
Central and Southern California Wildflower Location Guide By Spencer Westbrook. click here for more information.
A Flora of Southern California Philip A. Munz
A Flora of Kern County, California Ernest C. Twisselmann. Illustrated by Eben and Gladys McMillan
Death Valley Wildflowers Roxana S. Ferris (Author) and Jeanne R. Janish (Illustrator)
Flora of the Santa Barbara Region California, Clifton F. Smith
Flora of Santa Monica Mountains Peter H. Raven, Henry J. Thompson and Barry A. Prigge.
Flowering Plants:The Santa Monica Mountains, Coastal and Chapparral Regions of Southern California Nancy Dale
Santa Monica Mountains Flora A Checklist by Bob Muns
Flora of the Santa Ana River and Environs Oscar F. Clarke. (Los Angeles, Orange County and Riverside County)
The Jepson desert manual: vascular plants of southeastern California Bruce G. Baldwin
California Desert Flowers Sue Morhardt and Emil Morhardt
Mojave Desert Wildflowers Pam MacKay
Mojave Desert Wildflowers by Jon Mark Stewart
Colorado Desert Wildflowers by Jon Mark Stewart
Sonoran Desert Wildflowers Richard Spellenberg
Checklist of the Vascular Plants of San Diego County Jon P. Rebman and Michael G. Simpson
San Diego Native Plants James Lightner
88 California Wildflower Locations Carol Leigh (not a flora or flower field guide, but a useful guide to wildflower locations and approximate bloom periods).
A number of the books mentioned are not in print, but can usually be found by searching used book websites such as http://www.bookfinder.com/ or Amazon. They may also be found in libraries, especially university libraries.
If you have suggestions for additions to the list please send as a comment.