I9I9] 



INDEX TO VOLUME LXVII 



527 



Seeds, after-ripening and germination 

 281; correlations in position in pods 

 243; secondary dormancy in 269 



Selaginella 183 



Severy, J. \V., work of 102 



Seward, A. C, "Fossil plants" 93 



Shive, J. W., work of 176 



Shull, C. A. 276, 376 



Sinnott, E. W. 374; work of 103 



Smith, Annie L., "British lichens" 268 



Smith, J. J., work of 280 



Soil, acidity of 519; conditions and plant 

 growth 171; physiological balance in 

 174 



South Africa, grasses and grasslands of 

 370 



Spoehr, H. A. 405 



Stakman, E. C, work of 181, 273 



Stallard, H., work of 372 



Standley, P. C, work of 269 



Statolith starch 520 



Steil, W. N. 469; work of 519 



Stevens, F. L. 173 



Stigmatea guettardae 508 



Stomata 274 



Stopes, Marie C, work of 375 



Stropharia epimyces, development of 258 



Subsoil of prairies 185 



Succulence, basis of 405 



Sunflowers, hybrid perennial 264 



Szombathy, K., work of 373 



Transeau, E. N., work of 514 

 Transpiration 277 

 Trelease, W., "Winter botany" 173 

 Trichostroma axonopi 510 

 Trimorphism of Pontederia 271 

 Trumbull, R. S. 185 

 Tupper, W. W., work of 374 

 Turgor movements 278 



Van Ameijden, U. P., work of 184 

 Van Eseltine, G. P., work of 183 

 Van Laer, H., work of 515 

 Variation, analysis of quantitative 100 

 Vitamines, catalase, and respiration 1 79 



w 



Walster, H. L. 171 



Water conduction in trees and shrubs 275 



Weatherwax, P., work of 104 



Weed, C. M., "Our trees, how to know 

 them" 174 



Wehmer, C, work of 517 



West, C, work of 269 



Whetzel, H. H. 366; "History of phyto- 

 pathology" 173 



Willows, American 27, 309 



Wolfe, J. J., work of 278 



Wound callus and bacterial tumor 516 



Wylie, R. B. 271 



Tehon, L. R. 501 



Thompson, W. P., work of 279 



Tilia, after-ripening and germination 281 



Toda, Viscount Y., work of 279 



Toole, E. H., work of 448 



Tottingham, W. R., work of 175, 448 



X 



Xylem, size variation in 374 



Zollikofer, Clara, work of 520 



