INDEX TO AMERICAN BOTANICAL LITERATURE 615 
Warnstorf,C. Neue europaischen und aussereuropaischen Torfmoose. 
Hedwigia 47: 76-112. 30S 1907. [lllust.] 
Includes descriptions of 14 new American species of Sphagnum. 
Whetzel, H. H. Some bacterial diseases of plants: their nature and 
treatment. Trans. Mass. Hort. Soc. 1907: 117-130. 1907. 
Wilkinson, T, J. Breaking into botany. Am. Bot. 13: 36, 37. O 
1907. 
Winslow, E. J. Notes on spore dispersal in Sphagnum. Bryologist 
10%. 131i) aN 3907. 
Wooton, E. 0. & Standley, P. The genus Androsace in New Mexico. 
Bull. Torrey Club 34: 517-520. 17 D 1907. 
Includes descriptions of two new species. 
Young, R. T. The forest formations of Boulder County, Colorado. 
Bot. Gaz. 44: 321-352. f. 7-12. 16 N 1907. 
