Jan. 13. 1919 Morphology of Urediniospores of P. graminis 77 



LITERATURE CITED 



(i) Butler, E. J., and Hayman, J. M. 



1906. INDIAN WHEAT RUSTS. Mem. Dept. Agr. India, Bot. Ser., v. i, no. 2, 

 58 p., 5 pi. (4 col.). 



(2) Christman, a. H. 



1905. observations on the wintering op grain rusts. In Trans. Wis. 

 Acad. Sci., v. 15, pt. i, p. 98-107. 



(3) Freeman, E. M., and Johnson, Edward C. 



1911. THE rusts of grains IN THE UNITED STATES. U. S. Dept. Agr. Bur. 

 Plant Indus. Bui. 216, 87 p. 2 fig., i pi. Bibliography, p. 79-82. 



(4) FrommE, F. D. 



1913. THE CULTURE of CEREAL RUSTS IN THE GREENHOUSE. In Bul. Torrey 

 Bot. Club, V. 40, no. 9, p. 501-521. Literature, p. 5x9-521. 



(5) Jaczewski, a. von. 



1910. STUDIEN USER DAS VERHALTEN DES SCHWARZROSTES DES GETREIDES IN 



RUSSLAND. In Ztschr. Pflanzenkrank, Bd. 20, Heft 6, p. 321-359, 8 fig. 



(6) Johnson, Edward C. 



19 11. timothy RUST IN THE UNITED STATES. U. S. Dept. Agr. BuT. Plant 



Indus. Bul. 224, 20 p. 



(7) 



1912. CARDINAL TEMPERATURES FOR THE GERMINATION OP UREDOSPORES OP 



CEREAL RUSTS. (Abstract.) In Phytopathology, v. 2, no. i, p. 47. 



(8) Long, W. H. 



i914. influence of the host on the morphological characters of puc- 

 ciNiA ELLisiANA AND pucciNiA ANDROPOGONIS. In JouT. Agr. Re- 

 search, V. 2, no. 4, p. 303-319. 



(9) Salmon, E. S. 



1903. on specialization op parasitism in the erysiphaceae. i. in bcih. 

 Bot. Centbl. Bd. 14, p. 261-315, pi. 18. 



(10) Sheldon, John L. 



1905. THE EFFECT OF DIFFERENT SOILS ON THE DEVELOPMENT OF THE CARNA- 

 TION RUST. In Bot. Gaz., v. 40, no. 3, p. 225-229. 



(11) Stakman, E. C. 



1914. a STUDY IN CEREAL RUSTS: PHYSIOLOGICAL RACES. Minn. Agr. Exp. 



Sta. Bul. 138, 56 p., 9 pi. Bibliography, p. 50-54. 



(12) and Jensen, Louise. 



191 5. INFECTION experiments WITH TIMOTHY RUST. In Jour. Agr. Research, 



v. 5, no. 5, p. 211-216. Literature cited, p. 216. 



(13) and PiEMEiSEL, F. J. 



1916. INFECTION OP TIMOTHY BY PUCCINIA GRAMINIS. In JouT. Agr. Research, 

 V. 6, no. 21, p. 813-816. Literature cited, p. 816. 

 (14) 



I917. BIOLOGIC FORMS OP PUCCINIA GRAMINIS ON CEREALS AND GRASSES. In 



Jour. Agr. Research, v. 10, no. 9, p. 429-496, pi. 53-59. Literature 

 cited, p. 493-495- 

 (15) Ward, H. M. 



1902. on the relations between host and parasite in the bromes and 

 THEIR BROWN RUST, Puccinia dispersa (Erikss.). In Ann. Bot., v. 16, 

 P- 233-315- 



