THE PLANT WORLD 



INDEX TO CONTENTS OF VOLUME NINETEEN, 1916 



Agi'icultural Index; Note 381 



Antagonism between Manganese and Iron in the Growth of 



Wheat. W. E. Tottingham and A. J. Beck 359 



Balance in Nutrient Media. W. E. Tottingham; Review 145 



Behavior of an Excised Branch of the Sahuaro. R. J. Pool 17 



Benedict, H. M. Physiological Vigor; Review 114 



Berry, E. W. Geological History of Gymnosperms 27 



Berry, E. W. Notes on the Ancestry of the Beech 68 



Bowman, H. H. M. Work of; Note 81 



Bracken in New Zealand ; Note 246 



Bray, W. L. Vegetation of New York; Note 284 



Brooklyn Botanic Garden; Note 149 



Brown, W. H. Movement and Stimulation in Dionaea; Review . . 204 



Chambers, C. 0. Fixation of Free Nitrogen by Certain Fungi . . . 175 



Charge for extra pages in The Plant World 209 



Collins, G. N., and Kempton, J. H. Field Auxanometer; Review. . 243 

 Cooper, W. S. Plant Successions in the Mount Robson Region, 



British Columbia 211 



Critique of the Hypothesis of the Lime-Magnesia Ratio. C. B. 



Lipman 83, 119 



Daily Movements of Leguminous Leaflets. F. C. Gates 42 



Davidson, J. Selective Permeability and the Plasma Membrane. . 331 



Development of the Ovule of Impatiens pallida. Anna H. Raitt 195 



Diseases of Cultivated Plants. G. Massee; Review 207 



Dry Grassland of a High Mountain Park in Northern Colorado. 



Francis Ramaley 249 



Dunham, Elizabeth M. How to Know the Mosses; Review 326 



Dunn, Grace A. Study of the Development of Dumotitia filiformis 271 



Ecological Society; Notes 51, 246 



Effect of Vanillin and Salicylic Aldehyde in Culture Solution. 



J. J. Skinner 371 



Factors Influencing Nitrogen Fixation. Bruce Williams; Review. . 379 



Fallis, A. L. Work on Nereocystis; Review 48 



Field Auxanometer. G. N. Collins and J. H. Kempton; Review. . 243 



Findlay, H. House Plants; Note 210 



Fixation of Free Nitrogen by Certain Fungi. C. 0. Chambers. . . . 175 

 Flora of the Northwest Coast. C. V. Piper and R. K. Beattie; 



Review _. 171 



Forests of Porto Rico; Note '. 381 



Forests of the Hawaiian Islands. Vaughan MacCaughey 162 



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