KITTIE F. PARKER, Professor of Botany at George Washington University, and Research Associate at the Smithsonian Institution, Washington, D.C., was formerly on the faculty of the University of Arizona Department of Botany, and Curator of the Herbarium. Her primary field of research is in the Compositae (sunflower family) of western North America, in the tribe Helenieae, especially the genera Hymenoxys,Tetraneuris, and Pectis.
The present book is a complete revision, with many additional weeds, of the 1958 publication, Arizona Ranch, Farm, and Garden Weeds, Agricultural Extension Service, Circular 265.
LUCRETIA BREAZEALE HAMILTON, who drew the illustrations for Weeds, has done botanical illustrations for numerous publications. The Soil Conservation Service, the University of Arizona, and the Forestry Service have employed her pen and ink drawings. She illustrated the cactus publications of Lyman D. Benson of Pomona College, and his chapter on cacti in The Flora of Texas.
She and her family are long time Tucson residents, who came to the state from Virginia. While studying for her BS in botany from the University of Arizona, she began her career as botanical artist by doing illustrations for her botany notebooks. Some of her first work was for E. D. Ball, the entomologist, who taught her to draw grasshoppers in pen and ink.
Weed identification is the first battle in the endless struggle with weeds, and Kittie Parker in this book has assembled the material for effective combat.
In the 1970s, problems must be faced which did not even exist at the time of her earlier Agricultural Bulletin, Arizona Ranch, Farm, and Garden Weeds. Weed populations slowly change, so new weeds have to be discussed. Land use in Arizona has changed, and agricultural weeds-such as pigweed and Johnsongrass-have been replaced by the spurge and crabgrass of urban areas. New chemicals-the herbicides-have been developed to provide an additional alternative when weeds must be controlled.
All these elements plus those presented in the first edition in bulletin form are unfolded in Kittie Parker's proven, effective descriptions and discussions, augmented by the excellent drawings by Lucretia Hamilton. Identification and control features of the first edition established the compilation as of working value not only to those on farms, ranches and in urban areas, but also to science classes in schools, to field men of the chemical industries working on crops, and to our neighbors in northwestern Mexico whose many weed problems are the same because of the similarity of the regions.
This new, updated version will continue to perform such a valuable role.
K. C. HAMILTON
Agronomist, University of Arizona
I am especially indebted to Mrs. Lucretia B. Hamilton for her excellent illustrations; to Walter S. Phillips of the University of Arizona Biological Sciences Department and the late Charles U. Pickerell, former Director of the Agriculture Extension Service, for without their assistance, the first edition of Weeds could not have been published; to Keith C. Hamilton of the Agronomy Department, for his advice and information on the important farm weeds in Arizona and their distribution; to William J. Pistor, former Head of the Department of Animal Pathology, for information on the livestock-poisoning weeds; and to my husband Kenneth W. Parker, of the U.S. Forest Service, for his considerable aid, and for information on the range weeds. Gratitude is expressed to the curators of the U.S. National Herbarium, and especially to Charles T. Mason, Jr., curator of the University of Arizona Herbarium, for their helpful suggestions and the use of their materials and facilities; and to the many people who helped in the collecting of fresh plant material for the drawings, particularly Louis B. Hamilton. Thanks are also due to the University of Arizona Press for effecting publication.K. F. P.