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



Weaver, J. E. (1543) 



A STUDY OF THE VEGETATION OF SOUTHEASTERN WASHINGTON AND ADJACENT 



idaho. Nebr. Univ. Studies 17, no. 1, 131 pp., illus. 1917. 



(1544) 



the ecological relations of roots. 128 pp., illus. (Carnegie Inst. Wash. 



Pub. 286). 1919. 



(1545) 



ROOT DEVELOPMENT IN THE GRASSLAND FORMATION, A CORRELATION OF THE 

 ROOT SYSTEMS OF NATIVE VEGETATION AND CROP PLANTS. 151 pp., illus. 



(Carnegie Inst. Wash. Pub. 292). 1920. 



(1546) 



PLANT PRODUCTION AS A MEASURE OF ENVIRONMENT. A STUDY IN CROP 



ecology. Jour. Ecology 12: 205-237, illus. 1924. 



and Clements, F. E. (1547) 



plant ecology. 520 pp., illus. New York. 1929. 



— and Fitzpatrick, T. J. (1548) 



ECOLOGY AND RELATIVE IMPORTANCE OF THE DOMINANTS OF TALL-GRASS 



prairie. Bot. Gaz. 93: 113-150, illus. 1932. 



and Fitzpatrick, T. J. (1549) 



the prairie. Ecol. Monog. 4: 113-295, illus. 1934. 



Whitfield, C. J. (1550) 



THE ECOLOGY OF THE VEGETATION OF THE PIKE'S PEAK REGION. Ecol. 



Monog. 3: 75-105, illus. 1932. 

 Wiley, H. W. (1551) 



INFLUENCE OF ENVIRONMENT ON THE CHEMICAL COMPOSITION OF PLANTS. 



U. S. Dept. Agr. Yearbook 1901: 299-318. 1902. 



See also Bates (1576), Bews (5), Briggs and others (24-71), Clements (6, 2311), 

 (2488), Cotton (798), Cowles (82), Darlington (799), Dayton (801), Gregorv 

 (2714), Griffiths (820, 821), Kearnev and others (780), Lamson-Scribner 

 (870), Lieberg (6199), Merriam (7625, 7628), Nelson (888), Sampson (22, 

 2692, 2876), Shantz (2164), (2284), Shelford (2167), Smith (918), (2862), 

 Spragg (925), Taylor and others (2092), Vestal {1977), Watson (2180), 

 Weaver and others (1567, 2598), Williams (952), and Youngs and others 

 (1811). 



HABITAT 



Publications treating generally of the site or environment which a range plant 

 or plant groups natively occupy; and definitions of the various site factors. 



Cannon, W. A. (1552) 



SPECIALIZATION IN VEGETATION AND IN ENVIRONMENT IN CALIFORNIA. Plant 



World 17: 223-237, illus. 1914. 



Korstian, C. F. (1553) 



native vegetation as a criterion of site. Plant World 22: 253-261. 

 1919. 



Livingston, B. E. (1554) 



evaporation and plant habitats. Plant World 11: 1-9. 1908. 



■ ■ ■ (1555) 



OSMOTIC PRESSURE AND RELATED FORCES AS ENVIRONMENTAL FACTORS. 



Plant World 16: 165-176. 1913. 

 McBryde, J. B. (1556) 



THE VEGETATION AND HABITAT FACTORS OF THE CARRIZO SANDS. Ecol. 



Monog. 3: 247-297, illus. 1933. 

 MacDougal, D. T. (1557) 



BIOLOGICAL AND PHYSICAL FACTORS AFFECTING PLANTS IN NEW HABITATS. 



Carnegie Inst. Wash. Yearbook 19: 69-71. 1920. 

 Pearson, G. A. (1558) 



FACTORS CONTROLLING THE DISTRIBUTION OF FOREST TYPES. Ecology ll 



139-159, 289-308, illus. 1920. 



