

476 



INDEX TO VOLUME LXX 



[DECEMBER 1920 



vestitifolium 183; virgultorum 173; 

 zentanum 170 



Plantago in Hawaii 328 



Polycotylous seedlings 87 



Potato, gases in intercellular spaces 308 



Prankerd, T. L. 148 



Protoplasm, viscosity values of 360 

 Pseudodatura 406 

 Pteridophytes, Papuan 321 



R 



Rainfall efficiency 326 



Rendle, A. B., "Flora of Jamaica" 404 



Reviews: Baker's "Hardwoods of Aus- 

 tralia" 158; Britton's "Cactaceae" 

 404; Cockayne's "New Zealand plants" 

 403; Fawcett's "Flora of Jamaica" 404; 

 Onslow's "Practical plant biochem- 

 istry" 403; Pellett's "American honey 

 plants" 405; Rendle's "Flora of 

 Jamaica" 404; Rose's "Cactaceae" 404 



Rhizopus, protoplasm of 373 



Richards, E. H., work of 167 



Richey, H. W. 162 



Ridley, H. N., work of 322 

 Rinorea 405 



Rock, J. F., work of 327, 328 



Roots, contraction of 168; monocotyle- 

 donous 87 



Rose, J. X., "Cactaceae" 404 

 Russell, E. J., work of 167 



S 



Saccardo, Pier Andrea, biographical 



sketch 156 

 Sando, C. E., work of 471 

 Scaphocalyx 322 

 Schanz, F., work of 244 

 Schlechter, R., work of 87 

 Schley , Eva O. 69 



Sclerotinia cinerea, pectin relations of 221 

 Scrophulariaceae, western 321 

 Sectioning hard woody tissues 82 

 Seedlings, polycotylous 87 

 Seed plants, phylogeny of 164 



Seeds, heat treatment of 168; steriliza- 

 tion of 472 



Seifriz, W. 360; work of 166 



Setchell, W. A., work of 87, 407 



Sex intergrades 88 



Sherff, E. E. 89, 329 



Shreve, F., work of 408 



Sifton, H. B., 425 



Smithiella 406 



Smith, W. W., work of 322 



South Africa, plant distribution in 472 



Spinach, mosaic disease of 167 



Spoehr, H. A. 268 



Spores, isolating 319 



Spratt, Amy V., work of 87 

 Stapf, O., work of 406 

 Statocytes of wheat haulm 148 

 Steinberg, R. A. 465; work of 323 

 Stemodia 322 ^ 



Stetsonia 404 

 Stevens, F. L. 399 

 Stevens, N. E., work of 88 

 St. John, H., work of 87 

 Stomata, subcortical 295 

 Stork, H. E., work of 472 



T 



Taraxacum 



472; ceratophorum 338; 



eriophorum 347; laevigatum 356; 



lyratum 332; North American species 



of 329; vulgare 350 

 Thellungia 406 



Thymeleaceae, ovules and seeds of 407 

 Todea barbara, stem anatomy of 279 

 Tomatoes, ripening of 471 

 Trabutia portoricensis 401; cordiae 401 

 Transpiration and evaporation 190 

 Tree growth 159, 408 



u 



Umbellulanthus 405 



Unit characters, modification of 326 



v 



Vaccinium, endosperm development in 88 



Valeria 322 



Van Alderwerelt van Rosenburgh, 



C.R.W.K., work of 406 

 Vaughania 405 

 Verena 322 



w 



Walker, Leva B. 1 

 Whytockia 322 



Wieland, G. R., work of 165 

 Wiggins, C. C. work of 162 

 Wildeman, E. de, work of 405 

 Willaman, J. J. 221 

 Willis, J. C, work of 324, 325 

 Wilson, O. T. 51 



x 



Xylem, in Cycads 425 



Y 



Yampolsky, C, work of 88 



z 



Zehnterella 404 



Zijp, C. Van, work of 406 



Zynthia phaseoli 402 



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