INDEX TO AMERICAN BOTANICAL LITERATURE 67 
Dorsey, M. J. The inheritance and permanence of clonal varieties. 
Proc. Am. Soc. Hort. Sci. 1916: 41-71. Mr 1917. 
Dorsey, M. J. Sterility in the grape. Proc. Soc. Hort. Sci. 1912: 
149-153. Mr 1913. 
Dudgeon, W. Morphology of Rumex crispus. Bot. Gaz. 66: 393-420. 
pl. 17-19 + f. I-21. 15 N 1918. . 
Dufrenoy, J. Pine needles, their significance and history. Bot. Gaz. 
66: 439-454. f. 1-29. 15 N 1918. 
Dymond, J. R. Seeds. Ottawa Nat. 32: 52, 53. S 1918. 
Ferris, R. S. Taxonomy and distribution of Adenostegia. Bull. 
Torrey Club 45: 399-423. pl. ro-12. 19 O 1918. 
Adenostegia Hanseni, A. parviflora, A. littoralis, A. Helleri, and A. palmata, spp. 
nov., are described. 
Fisher, D. F. Apple powdery mildew and its control in the arid regions 
of the Pacific northwest. U. S. Dept. Agr. Bull. 712: 1-28. pl. 
73 + 7.7; 2. 260 1958. 
Fitch, C. L. Field studies of a leafroll disease of potatoes. Proc. Soc. 
Hort. Sci. 1912: 44-51. Mr 1913. 
Fitzpatrick, H. M. The cytology of Eocronartium muscicola. Am. 
Jour. Bot. 5: 397-419. pl. 30-32. 9 N 1918. 
Free, E. E. A colloidal hypothesis of protoplasmic permeability. 
Plant World 21: 141-150. Je 1918. 
Fromme, F. D. An automatic spore trap. Phytopathology 8: 542- 
544. f.7. O rgr8. : 
Gleason, H. A. On the development of two plant associations of 
‘northern Michigan. Plant World 21: 151-158. Je 1918. 
Goodspeed, T. H. Method of replacing paraffin solvent with paraffin. 
Bot. Gaz. 66: 381, 382. 160 1918. 
Graff, P. W. Philippine Basidiomycetes—III. Bull. Torrey Club 
45: 451-469. pl. 15. 15 N 1918. 
Harper, R. M. The American pitcher-plants. Jour. Elisha Mitchell 
Sci. Soc. 34: 110-125. pl. 2-6. S 1918. 
Harrington, G. T., & Crocker, W. Resistance of seeds to desiccation. 
Jour. Agr. Research 14: 525-532. 16S 1918. 
Hartley, C. Stem lesions caused by excessive heat. Jour. Agr. 
Research 14: 595-604. f. 1. 23 S 1918. 
Harvey, R. B. Hardening process in plants and developments from 
frost injury. Jour. Agr. Research 15: 83-112. pl. 7-11, A. + f. 1-3. 
14 O 1918. 
