INDEX TO AMERICAN BOTANICAL LITERATURE 619 
Prescott, A. The osmundas. Fern Bull. 20: 21-24. Au 1912. 
Quehl, L. Die Bliite des Echinocactus nidulans Quehl. Monats. 
Kakteenk. 22: 127. 15 Au 1912. 
Reddick, D. Field laboratory equipment. Phytopathology 2: 172- 
174. Au I9QI2. 
Rehm, H. Ascomycetes exs. Fasc. 50. Ann. Myc. 10: 353-358. Au 
Includes notes on several American species of ey 
Rehm, H. Ascomycetes novi. Ann. Myc. 10: 389-397. Au 1912. 
Includes one new species each in Mycobilimbia, S Abe and Fabraea from 
America. 
Rigg, G. B., & Dalgity, A. D. A note on the generations of Polyst- 
phonia. Bot. Gaz. 54: 164, 165.f. 7. 16 Au 1912. 
Safford, W. E. Notes of a naturalist afloat—IV. Am. Fern Jour. 2: 
65-82. 3 Au 1912. 
Sahasrabuddhe, G. M. The study of sugar-cane varieties with a view 
to their classification. West Ind. Bull. 12: 378-387. 1912. 
Schock, O. D. Fighting the chestnut tree blight. Am. Forest. 18: 
575-579. $1912. [Illust.] 
Shafer, J. A. Botanical exploration in Pinar del Rio, Cuba. Jour. 
N. Y. Bot. Gard. 13: 136-147. 5S 1912. 
Sharp, L. W. Spermatogenesis in Equisetum. Bot. Gaz. 54: 89-119. 
pl. 7, 8 16 Au 1912. 
- Shull, G. H. The primary color-factors of Lychnis and color-inhibitors 
of Papaver Rhoeas. Bot. Gaz. 54: 120-135. 16 Au 1912. 
Skinner, J. J. Beneficial effect of creatinine and creatine on growth. 
Bot. Gaz. 54: 152-163. f. 1. 16 Au 1912. 
Skinner, J. J. Influence of phosphate on the toxic action of cumarin. 
Bot. Gaz. 54: 245-249. 215 1912. 
Skottsberg, C. Die Gattung Bolax Commerson. Bot. Jahrb. Beibl. 
48: 1-6. f. 1-4. 27 Au 1912. 
Skottsberg, C. Tetrachondra patagonica n. sp. und die Latent 
Stellung der Gattung. Bot. Jahrb. Beibl. 48: 17-26. f. 1-8. 27 
Au 1912. 
Small, J.K. The kaffir orange. oe N. Y. Bot. Gard. 13: 127, 128. 
f. 1. Ausgt2. Strychnos spino 
Smith, E.F. Bacillus Coli, a cause an plant disease. Phytopathology 
2: 175, 176. Au 1912. 
A note explaining priority of publication on the su 
Smith, E. F. Bacterial mulberry blight. pu stoaibowey®: 175. Au 
1912. 
