BENSON, LYMAN, and DARROW, ROBERT A. _A Manual of Southwestern Desert Trees and Shrubs_, Biological Science Bulletin No. 6, University of Arizona, Tucson, 1944. A thorough work of 411 pages, richly illustrated, with general information added to scientific description. CARR, WILLIAM HENRY. _Desert Parade: A Guide to Southwestern Desert Plants and Wildlife_, Viking, New York, 1947. CLEMENTS, FREDERIC E. and EDITH S. _Rocky Mountain Flowers_, H. W. Wilson, New York, 1928. Scientific description, with glossary of terms and key for identification. COULTER, JOHN M. _Botany of Western Texas_, United States Department of Agriculture, Washington, 1891-94. OP. Nothing has appeared during the past sixty years to take the place of this master opus. GEISER, SAMUEL WOOD. _Horticulture and Horticulturists in Early Texas_, Southern Methodist University Press, Dallas, 1945. Historical-scientific, more technical than the author's _Naturalists of the Frontier_. JAEGER, EDMUND C. _Desert Wild Flowers_, Stanford University Press, California, 1940, revised 1947. Scientific but designed for use by any intelligent inquirer. LUNDELL, CYRUS L., and collaborators. _Flora of Texas_, Southern Methodist University Press, Dallas, 1942-. A "monumental" work, highly technical, being published part by part. MCKELVEY, SUSAN DELANO. _Yuccas of the Southwestern United States_, Harvard University Press, Cambridge, 1938. Definitive work in two volumes. _Range Plant Handbook_, prepared by the Forest Service of the United States Department of Agriculture. United States Government Printing Office, Washington, 1937. A veritable encyclopedia, illustrated. SCHULZ, ELLEN D. _Texas Wild Flowers_, Chicago, 1928. Good as a botanical guide and also for human uses; includes lore on many plants. OP. _Cactus Culture_, Orange Judd, New York, 1932. Now in revised edition. SILVIUS, W. A. _Texas Grasses_, published by the author, San Antonio, 1933. A monument, of 782 illustrated pages, to a lifetime's disinterested following of knowledge "like a star." STEVENS, WILLIAM CHASE. _Kansas Wild Flowers_, University of Kansas Press, Lawrence, 1948. This is more than a state book, and the integration of knowledge, wisdom, and appreciation of flower life with botanical science makes it appeal to layman as well as to botanist. 463 pages, 774 illustrations. Applicable to the whole plains area. STOCKWELL, WILLIAM PALMER, and BREAZEALE, LUCRETIA. _Arizona Cacti_, Biological Science Bulletin No. 1, University of Arizona, Tucson, 1933. Beautifully illustrated. THORNBER, JOHN JAMES, and BONKER, FRANCES. _The Fantastic Clan: The Cactus Family_, New York, 1932. OP. THORP, BENJAMIN CARROLL. _Texas Range Grasses_, University of Texas Press, Austin, 1952. A survey of 168 species of grasses, their adaptability to soils and regions, and their values for grazing. Beautifully illustrated and printed, but no index.