Weeds of California and Other Western States (2006) California Invasive Plant Council.
This 1900-page, 2-volume set is the most complete book on weed identification ever produced in the United States. Identification guide to 750 weed species with 3000 color photos. Detailed descriptions of morphology and biology. Includes a CD with all photos from the book, copyright-free for educational use. Published by University of California, Department of Agriculture and Natural Resources.
