FLOWERING PLANTS AND FERNS OF ARIZONA 1037 



Merriam, C. Hart. 



1890. RESULTS OF A BIOLOGICAL SURVEY OF THE SAN FRANCISCO MOUNTAIN 

 REGION AND DESERT OF THE LITTLE COLORADO, ARIZONA. U. S. 



Dept. Agr. North Amer. Fauna, No. 3, 136 pp., illus. 

 Nichol, A. A. 



1937. the natural vegetation of Arizona. Univ. Ariz. Tech. Bui. 68, 

 pp. 181-222. 

 Pearson, G. A. 



1931. FOREST TYPES IN THE SOUTHWEST AS DETERMINED BY CLIMATE AND 



soil. U. S. Dept. Agr. Tech. Bui. 247. 

 Goldman, E. A., Shreve, Forrest, and Vorhies, Charles T. 



1926. ARIZONA, IN NATURALISTS' GUIDE TO THE AMERICAS. Pp. 562-569, 



Baltimore. 

 Read, A. D. 



1915. THE FLORA OF THE WILLIAMS DIVISION OF THE TUSAYAN NATIONAL 



forest, Arizona. Plant World 18: 112-123. 

 Shantz, H. L., and Zon, R. 



1924. natural vegetation. Atlas of Amer. Agr. pt. I, sect. E. 

 and Piemeisel, R. L. 



1925. indicator significance of the natural vegetation of the south- 



western desert region. Jour. Agr. Res. 28: 721-801, illus. 

 Shreve, Forrest. 



1915. THE vegetation of a desert mountain range as conditioned by 

 climatic factors. Carnegie Inst. Wash. Pub. 217, 112 pp., illus. 



1917. A MAP OF THE VEGETATION OF THE UNITED STATES. GeOg. Rev. 3: 



119-125, illus. 



1936. the plant life of the sonoran desert. Sci. Monthly 42: 195-213. 

 Thornber, J. J. 



1910. the grazing ranges of Arizona. Ariz. Agr. Expt. Sta. Bui. 65, 

 pp. 245-360, illus. 

 Turnage, W. V., and Hinckley, A. L. 



1938. freezing weather in relation to plant distribution in the 



sonoran desert. Ecol. Monog. 8: 529-550. 



USES AND POPULAR INTEREST 



Alsberg, C. L., and Black, O. F. 



1912. LABORATORY STUDIES ON THE RELATION OF BARIUM TO THE LOCO-WEED 



disease. U. S. Dept. Agr., Bur. Plant Indus. Bui. 246, pt. 2. 

 Ball, Walter S., and others. 



1931. [weeds]. Calif. Dept. Agr., Monthly Bui. 22: 252-305. 

 Bartlett, O. C. 



1930. ARIZONA LIST OF DANGEROUS PLANT PESTS AND PLANT DISEASES. 



Ariz. Comm. Agr. and Hort. (Names of host plants.) 

 Beath, O. A. 



1939. THE SELENIFEROUS ASTRAGALUS OSTERHOUTII JONES. Amer. Jour. 



Bot. 26: 729-730. 

 Gilbert, C. S., and Eppson, H. F. 



1939. THE USE OF INDICATOR PLANTS IN LOCATING SELENIFEROUS AREAS IN- 

 WESTERN united states. Amer. Jour. Bot. 26: 257-269, 296-315. 

 Gilbert, C. S., and Eppson, H. F. 



1940. THE USE OF'lNDICATOR PLANTS IN LOCATING SELENIFEROCS AREAS IN 



western united states. Amer. Jour. Bot. 27: 564-573. 

 Beckett, R. E., and Stitt, R. S. 



1935. the desert milkweed (asclepias subulata) as a possible source 



of rubber. U. S. Dept. Agr. Tech. Bui. 472. 

 Stitt, R. S., and Duncan, E. N. 



1938. RUBBER CONTENT AND HABITS OF A SECOND DESERT MILKWEED (ASCLE- 

 PIAS EROSA) OF SOUTHERN CALIFORNIA AND ARIZONA. V. S. Dept, 



Agr. Tech. Bui. 604. 

 Bell, W. H., and Castetter, E. F. 



1937. THE UTILIZATION OF MESQUITE AND SCREWBEAN BY THE ABORIGINES IN 



THE AMERICAN SOUTHWEST. N. Mex. UlHY. Bill. 314. 



Bidwell, G. L., and Wooton, E. O. 



1925. SALTBUSHES AND THEIR ALLIES IN THE UNITED STATES. I". S. Dept 



Agr. Bui. 1345. 



