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.
Plant Species That Threaten Ecosystems of the Pacific Islands (PIER) Pacific Island Ecosystems at Risk.
The U.S. Forest Service is pleased to announce the release of version 5.1 of the Pacific Island Ecosystems at Risk (PIER) web site and CD (Nov 2006). Over 5000 herbarium records from the Bishop Museum have been added to the location data.
