I'm looking for a tree and large flora reference for California and the surrounding states. The two that keep being recommended are Peterson's and the Audubon Society guide. I've used Peterson's and found the organization to be excellent, but the pictures could use some work. I haven't used the Audubon Society guide. From the Amazon preview, it looks like there's excellent photos, but I can't find any information on organization.
How do they compare?
A Field Guide to Western Trees (Peterson Field Guides: 44)
http://www.amazon.com/Field-Guide-W...=sr_1_1?s=books&ie=UTF8&qid=1288384623&sr=1-1
National Audubon Society Field Guide to North American Trees--W: Western Region
http://www.amazon.com/National-Audu...=sr_1_7?s=books&ie=UTF8&qid=1288384805&sr=1-7
How do they compare?
A Field Guide to Western Trees (Peterson Field Guides: 44)
http://www.amazon.com/Field-Guide-W...=sr_1_1?s=books&ie=UTF8&qid=1288384623&sr=1-1
National Audubon Society Field Guide to North American Trees--W: Western Region
http://www.amazon.com/National-Audu...=sr_1_7?s=books&ie=UTF8&qid=1288384805&sr=1-7