Weeds discussed in the book were selected by weed scientists who are members of the WSWS.  Weeds were selected because of their abundance, ability to reproduce, compete, and spread rapidly, as well as those that are toxic to livestock or humans.  An attempt was made to include a representative cross-section of the common agronomic, rangeland, horticultural, and non-cropland weeds of the western United States.  If plants are not included in the publication, please contact your county extension agent or university herbarium for proper identification.

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