DO NOT eat any mushrooms on the basis of photo ID alone -- many toxic mushrooms look edible!!!
Online resources & PDFs
Mykoweb - photos and descriptions of California fungi, and lots of other information
Common Mushrooms and Other Fungi of Salt Point, California
Mushrooms of Stebbins Cold Canyon Reserve (PDF) (west of Winters, CA)
50 Tips to Put More Morels in Your Basket The Mycophile Mar-Apr 2015. From midwest, but might be helpful here. (PDF)
Mushroom Observer - lots of photos and descriptions
Hebeloma.org - everything you might wish to know about the genus
Publications
Seifert, K. The Hidden Kingdom of Fungi: Exploring the Microscopic World in Our Forests, Homes, and Bodies Graystone Books 35.95 CAD
Kahn, M. Mason Goes Mushrooming Green Writer Press $16.69
Beirend, D. In Search of Mycotopia: Citizen Science, Fungi Fanatics, and the Untapped Potential of Mushrooms Chelsea Green Publishing $24.95
Siegel, N. & Schwarz, C. Mushrooms of the Redwood Coast: A Comprehensive Guide to the Fungi of Coastal Northern California Ten Speed Press (plasticized paper) $35.00
Desjardin, D.E., Wood, M.G., & Stevens, F.A. California Mushrooms: The Comprehensive Identification Guide Timber Press. Hardcover $60 ($42 from the publisher)
Davis, R. M., Sommer, R., & Menges, J. Field Guide to Mushrooms of Western North America, UC Press. $26.95 paper. order online
Besette, A., Beug, M. & Bessette, A.E. Ascomycete Fungi of North America A Mushroom Reference Guide, University of Texas Press. $85 ($56.95 from the publisher)
Arora, David, Mushrooms Demystified, 2nd ed., Ten Speed Press
Lincoff, Gary H., National Audubon Society Field Guide to North American Mushrooms, Knopf
Phillips, Roger, Mushrooms and other fungi of North America, 2nd ed., Firefly Books
Bone, Eugenia, Mycophilia: Revelations from the Weird World of Mushrooms, NY Times book review
Winkler, Daniel, Field Guide to Edible Mushrooms of California - Mushroaming and other information from Daniel Winkler.
Mushrooms of the National Forest in Alaska - beautiful, very comprehensive brochure (PDF).
Mushrooms and Other Nuisance Fungi in Lawns (PDF) published by UC Statewide Integrated Pest Management Program.
Petersen, Jens H., The Kingdom of Fungi, Princeton University Press, $29.95.
McIlvainea: Journal of American Amateur Mycology
Mushroom: The Journal of Wild Mushrooming
Apps for iPhone or iPad
Roger's Mushrooms Pro - $4.99
Fungi - $3.99
Videos
Lost in the Light, The Story of N. Gardneri - fascinating video on luminscent Brazilian mushroom
Taylor Lockwood's The Mushroom Identification Trilogy, DVD, $19.95
Dr. Andrew N. Miller, Mycologist, INHS
University of Illinois at Urbana-Champaign
http://vimeo.com/41572191 Mycology research
http://vimeo.com/41574577 Importance of InvertNet and Mycology
http://vimeo.com/41573407 Applications of mycology research
Miscellaneous links
Mycology: A Fun Board Game of Foraging for Fungi designed by a mycologist
Mushrooms of Oceania - beautiful photos
Mushroom recipes from member Hank Shaw Hunter Angler Gardener Cook
Mushroom Watercolors by Bob Sommer, listed by name, location, and date (thanks to the late John Lennie)
BAMS Mushroom of the Month and Archives
Other clubs (distant)
NAMA North American Mycological Association
LAMS Los Angeles Mycological Society
Commercial sites
Mushroom Stock Photo Catalog (Taylor Lockwood)
Paul Kozal Photography, Art of the Mushroom - photography from Gualala, uses interesting scanning technique.
Morels - board game designed by a Pennsylvania-based amateur mycologist, "... teaches in about 10 minutes, plays in 30 minutes, is for 2 players, and is designed for both adults and kids.