720 



Index 



Western American birches, The, 421 

 What IS Convallaria odorata Mill.?, 409 

 Wheelerella, 678 ; circumscissa, 678 

 WiNSLOW, C.-E. A. A statistical cri- 

 terion for species and genera among 

 the bacteria, 31 

 Winter buds with reference to their 

 growth and leaf content. The study 

 of, 117 

 Woodsia ilvensis, 670 ; obtusa, 670 



WOOTON, E. 0,, & SXANDLEY, P. C- 



Some hitherto undescribed plants 

 from New Mexico, 105 



Xyris caroliniana, 3; flexuosa, 2, 59^ '» 

 flexuosa pusilla, 2 ; montana, 2; torta, 



591 



Yucca glauca, 269 



Zamites angustifolius, 247 



Zea Mays, 191, 224, 457 



Zinc sulphate, Stimulation of storage 



tissues of higher plants by, 489 

 Zizia cordata, 658 



