INDEX TO AMERICAN BOTANICAL LITERATURE IgI 
Davidson, A. New botanical species from Sfouthern] Cali- 
fornia. Bull. S. California Acad. Sci. 21: 39-41. pl. 2. O 
1922. 
New species in Langloisia (1), Allium (1), and Fritillarta (1). 
Davis, W. H. Staining germinating spores. Phytopathology 
12: 492-494. 5 D 1922. 
Davis, W. H. The teaching of plant pathology. Proc. Iowa 
Acad. Sci.. 27: 81-84. 1920. 
Davis, W. H. Urocystis Agropyri on redtop. Mycologia 14: 
79-261. J) Te 3 
Deane, W. Vaccinium atrococcum, forma leucococcum. Rhodora 
245 226, 4g 1922. 
Dietel, P. Einige neue oder bemerkenswerte Uredineen. Ann. 
Myc. 20: 293-295. 1922. 
Includes 2 new American species. 
Dixon, H. N. Miscellanea Bryologica—VIII. Jour. Bot. 60: 
281-201. 1922. 
Dixon, H. N. The mosses of the Oxford University Expedition 
to Spitzbergen. Bryologist 25: 86-89. 7 N 1922. 
Dixon H. N. Note ona form of Pottia Heimii from Greenland. 
Bryologist 25: 92, 93. 7 N 1922. 
Dodge, B.O. A Lachnea with a botryose conidial stage. Bull. 
Torrey Club 49: 301-305. f. 1-7. 11 O 1922. 
Dodge, B. O. Studies in the genus Gymnospcrangium—lV. 
Am. Jour. Bot. 9: 354-365. pl. 22 + f. 1-7. 30 Au 1922. 
Doran, W. L. Effect of external and internal factors on the 
germination of fungous spores. Bull. Torrey Club 49: 
313-240: f- 4) 20° 9 N 1988: : 
Dosdall, L. Occurrence of the pycnial stage of Puccinia 
Taraxaci. Bull. Torrey Club 49: 235, 236. 31 Au 1922. 
Douglass, A. E. Some topographic and climatic characters in 
the annual rings of the yellow pines and sequoias of the 
southwest. Proc. Am. Phil. Soc. 61: 117-122. S 1922. 
