2 MISC. PUBLICATION 2 81, U. S. DEPT. OF AGRICULTURE 



Halperin, M. (12) 



grasses and man. Sci. Monthly 36: 258-262. 1933. 



Haskin, L. L. (13) 



wild flowers of the pacific coast . . . 407 op., illus. Portland, Ores. 

 1934. 



Higgins, V. (14) 



the study of cacti. 164 pp., illus. London. 1933. 



Hitchcock, A. S. (15) 



grasses, what they are and where they live. Smithsn. Inst. Ann. 

 Rept, 1933-34: 297-312, illus. 1935. 



and Chase, A. (16) 



grass. Smithsn. Sci. Ser. 11: 201-250, illus. 1931. 



Jepson, W. L. (17) 



the botanical explorers of California. vii-vni. Madrono 2: 

 25-29, 83-88, illus. 1931-33. 



Pt. VII: Joseph Cook Nevin, William Hillman Shockley, Charles Austin 

 Stivers, Lucia A. Summers. Pt. VIII. William G. W. Harford, Thomas 

 Bridges. 



McDougall, W. B., and Baggley, H. A. 



PLANTS OF YELLOWSTONE NATIONAL PARK. 



illus. 1936. 

 Makins, F. K. 



THE IDENTIFICATION OF TREES AND SHRUBS 



1936. 

 Nichol, A. A. 



THE NATURAL VEGETATION OF ARIZONA. 



68, pp. 181-222, illus. 1937. 

 Piper, C. V. 



FORAGE PLANTS AND THEIR CULTURE. '. 

 1928. 



Sampson, A. W. (22) 



native American forage plants. 435 pp., illus. New York. 1924. 



Schoth, H. A., and Halperin, M. (23) 



THE DISTRIBUTION AND ADAPTION OF POA BULBOSA IN THE UNITED STATES AND 



in foreign countries. Jour. Amer. Soc. Agron. 24: 786-793. 1932. 



Shreve, F. (24) 



the cactus and its home. 195 pp., illus. Baltimore. 1931. 



United States Department of Agriculture, Forest Service. (25) 



notes on national forest range plants. part i. grasses. u. s. 

 Forest Serv., Office of Grazing Studies, 224 pp. 1914. 



United States National Park Service. (26) 



death valley national monument. U. S. Natl. Park Serv., 31 pp., illus. 

 1935. 



Vasey, G. (27) 



the agricultural grasses and forage plants of the united states, 

 and such foreign kinds as have been introduced, with an appendix 

 on the chemical composition of grasses, by clifford richardson 

 and a glossary of terms used in describing grasses. u. s. dept. 

 Agr. Rept. 32, rev., 148 pp., illus. 1889. 



Westover, H. L. (28) 



crested wheatgrass. U. S. Dept. Agr. Leaflet 104, 8 pp., illus. 1934. 



Whitehouse, E. (29^1 



texas flowers in natural colors . . . 212 pp., illus. Austin, Tex. 1936. 



See also Hadwen and others {2752), Hitchcock (541, 543, 549, 550), Mc- 

 Ardle and others (2678, 2679), Piper and others (4381), Rockwell (8268), 

 Sampson (908, 910, 2690), Saunders (8265), Semple and others (2693), 

 Thornber (2702), and Vasey (8227). 



u. 



(18) 

 S. Natl. Park Serv., 160 pp., 





. 326 



pp., illus. 



(19) 

 New York. 



Ariz. 



Agr. 



Expt. Sta. 



(20) 

 Tech. Bull. 



v. ed 



., 671 



pp., illus. 



(21) 

 New York. 



