126 James G. Horsfall 



Davis, W. H., and Johnson, A. G. The accial stage of red clover rust. 

 Abstr. in Phytopath. 7 : 75. 1917. 



Delwiche, E. J. Tests of strains o* red clover from various sources. 

 Journ. Amer. Soc. Agron 18:393-403. 1926. 



Dickson, B. T. Further studies on mosaic — I. Abstr. in Phytopath. 

 12:42. 1922 a. 



Studies concerning mosaic diseases. Macdonald Coll. 





Technical bul. 2 : 1-125. 1922 b. 



Dickson B. T., and McRostie, G. P. Further studies on mosaic — II. 

 Abstr. in Phytopath. 12:42. 1922. 



Doran, Wm. L. Effect of external and internal factors on the germina- 

 tion of fungous spores. Torrey Bot. Club. Bul. 49:313-340. 1922. 



Drechsler, Charles. A new leaf spot of Kentucky blue grass caused 

 by an undescribed species of Helminthosporium. Abstr. in Phyto- 

 path. 12:35. 1922. 



Some graminicolous species of Helminthosporium I. Journ. 



agr. research 24:641-740. 1923. 



Leaf spot and foot rot of bluegrass. U. S. Golf Assoc. 



Green Sect. Bul. 9:120-123. 1929. 



Elliott, John A. Taxonomic characters of the genera Alternaria and 

 Macrosporium. Amer. Journ. bot. 4:439-476. 1917. 



— A mosaic of sweet and red clovers. Phytopath. 1 1 : 146- 



148. 1921. 



Ellis, J. B., and Everhart, B. M. Additions to Ramularia and Cerco- 

 spora. Journ. mycol. 4:1-7. 1888. 



New species of fungi from various localities. Acad. Nat. 



Sci. Philadelphia. Proc. 43:76-93. 1891. 



Phyllachora trifolii (Pers.). In North American Pyren- 



omycetes, p. 597. 1892. 



Eriksson, Jakob. Ceber einige Krankheiten Kultivierter Pflanzen und 

 fiber Massregeln zur Beschrankung der Pflanzenkrankheiten. Ztschr. 

 Pflanzenkrank. 1:27-33. 1891. 



Ueber die Specialisirung des Parasitismus bei den Getreide- 



rostpilzen. Deut, bot. Gesell. Ber. 12:292-331. 1894. 



