THE PLANT WORLD 



INDEX TO CONTENTS OF VOLUME EIGHTEEN, 1915 



Abscission. F. E. Lloyd; Review 91 



Acid Accumulation and Destruction in Large Succulents. E. R. 



Long 261 



Agricultural Atlas of United States ; Note 50 



American Ecological Society ; Note 320 



Antizymotic Action of a Harmful Soil Constituent. J. J. Skinner . . 162 



Appleman, C. O. Rest Period; Review 151 



Armstrong, M. Western Wild Flowers; Review 293 



Atmometry and the Porous Cup Atmometer. B. E. Livingston 



21, 51, 95, 143 



Bailey, L. H. Plant Breeding; Review 170 



Bakke, A. L. Transpiring Power of Leaves; Review 222 



Brenchlejr, W. E. Inorganic Plant Poisons and Stimulants; 



Review 203 



Broun, A. F. Tropical Silviculture; Review 19 



Burns, G. P. Relative Transpiration of White Pine Seedlings. ... 1 



Calkins, G. N. Text-Book of Biology; Review 89 



Cannon, W. A. Manometer Method of Determining Capillary 



Pull of Soils 11 



Chemistry of Colloids. W. W. Taylor; Review 344 



Cypresses and Junipers of the Rocky Mountain Region; Note 259 



Desert Vegetation of America. 0. Paulsen 155 



Dissemination of Virginia Creeper Seeds. B. T. Harvey 217 



Doctorates in Botany; Note 346 



Dunes of Lake Michigan. T. J. Stomps 205 



Effect of Vanillin as a Soil Constituent. J. J. Skinner 321 



Ferns of Washington. T. C. Frye and M. M. Jackson; Review. . 49 



Flora of California. W. L. Jepson; Review 127 



Flora of New Mexico; Note 259 



Flora of Tusayan National Forest, Arizona. A. D. Read 112 



Forest Climatology. G. A. Pearson; Review 150 



Free, E. E. Relative Score Method of Comparison of Plant 



Condition 249 



Fromme, F. D. Phototropism of Urediniospore Germ-Tubes; 



Review 172 



Georgia, A. E. Manual of Weeds; Review. 48 



Grafe, V. Methods in Physiology of Nutrition; Review 124 



Harshberger, J. W. Vegetation of Florida; Review 220 



Harper, R. M. Vegetation of Florida; Review 220 



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