Sources and Useful Links
The references below are hyper-linked — touch and it will take you to the site.
Books
1. Sunset Western Garden Book (http://www.amazon.com/Sunset-Western-Garden-Editors-Books/dp/0376039175)
2. Trees of the California Landscape (http://www.amazon.com/Trees-California-Landscape-Charles-Hatch/dp/0520251245/ref=sr_1_1?s=books&ie=UTF8&qid=1314042678&sr=1-1)
3. What Shrub is that? (http://www.amazon.com/What-Shrub-That-Shrubs-Described/dp/1877069698/ref=sr_1_1?s=books&ie=UTF8&qid=1314042718&sr=1-1)
4. Reimagining the California Lawn (http://www.amazon.com/Reimagining-California-Lawn-Water-conserving-Practices/dp/0978997123/ref=sr_1_1?s=books&ie=UTF8&qid=1314042759&sr=1-1)
5. Designing with Succulents (http://www.amazon.com/Designing-Succulents-Debra-Lee-Baldwin/dp/088192816X/ref=sr_1_1?s=books&ie=UTF8&qid=1314042819&sr=1-1)
6. Native Treasures: Gardening with the Plants of California (http://www.amazon.com/s/ref=nb_sb_ss_i_0_56?url=search-alias%3Dstripbooks&field-keywords=native+treasures+gardening+with+the+plants+of+california&sprefix=native+treasures+gardening+with+the+plants+of+california)
7. Field Guide to Trees, Western Region (http://www.amazon.com/National-Audubon-Society-American-Trees-W/dp/0394507614)
8. Care and Maintenance of Southern California Native Plant Gardens (http://www.cnps.org/store.php?crn=52&rn=365&action=show_detail)
9. California Native Plants for the Garden (http://store.theodorepayne.org/product/BAC/B_CNPG.html)
Links:
10. Tree of Life Nursery (http://www.californianativeplants.com/)
11. Las Palitas Nursery (http://www.laspilitas.com/)
12. San Marcos Growers (http://www.smgrowers.com/)
13. Monrovia Nursery (http://www.monrovia.com/)
14. US Department of Agriculture Plants Database (http://plants.usda.gov/java/)
15. The Jepson Manual (http://ucjeps.berkeley.edu/interchange/I_treat_indexes.html)