This book was first published by the University of California Press in 1961 and is an attempt to provide an answer to the long-standing need for reference work dealing exclusively with seed identification. The immediate aim of the manual is to help agriculturalists, foresters, wildlife biologists, and others interested in land-use programs to identify the seeds in their particular fields of interest. The authors have, in the main, restricted the content of the description to those characteristics useful for identification. The descriptions are, to the extent possible, nontechnical and therefore useful to a broader range of interests and skills.