1920] BISBY—UROMYCES 2 IS 



species of these rusts is found in other rusts (of various life cycles 

 and with i or 2-celled teliospores) upon the same or related hosts. 

 Indeed, as indicated under Uromyces heterodermus, a group of hosts 

 may bear a number of rusts of various life cycles, belonging to 

 Puccinia and Uromyces, widely distributed geographically, yet all 



unammitv ot m 



in 



The writer wishes to express his keen appreciation to Dr. J. C. 

 Arthur for suggesting this paper and for much help, and also to 

 Professor Jackson for many suggestions and constructive criticism. 

 To the other workers in the laboratory at Purdue University he 

 is likewise greatly indebted. 



University of Minnesota 

 St. Paul, Minn. 



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2. , Result. Sci. Congr. Bot. Vienne. 346. 1906. 



3- — ', Cultures of Uredineae in 1905. Jour. Myc. 12:20-21. 1906. 



4« ■ «, Uredinales, North American Flora 7:130. i9°7- 



5- ■ — ■, North American rose rusts. Torreya 9:21-28. 1909. 



6. Bisby, G. R., The Uredinales found upon the Onagraceae. Amer. 



Jour. Bot. 3:527-561. 1916. 

 7- Blackman, V. H. ? and Fraser, H. C. L, Further studies on the sexuality 

 of the Uredineae. Ann. Botany 20:35-48. 1906. 



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 1904. 



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tJber die morphologische BeVertung der gleichnamigen Sporenformen in • 

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10. y Einige Bemerkungen zur geographischen Verbreitung der Art en 



aus den Gattungen Uromyces und Puccinia. Ann. Myc. 9: 160-165. 1911. 



"• •, tlber die auf Leguminosen lebenden Rostpilze und die Verwandt- 



schaftsverhaltnisse der Gattungen der Pucciniaceen. Ann. Myc. 1:3-14- 

 1903; see also Ann. Myc. 10:205-213. 1912. 



12. Fischer, Ed., Entwickelungsgeschichtliche Untersuchungen tiber Rost- 

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