THE UREDINE^E OF MICHIGAN. 39 



THE UREDINE^E OF MICHIGAN. 



BY HARRIET L. MERROW. 



(Read before the Academy, December 27, 1894.) 

 [Abstract.] 



One hundred and fifteen species of Uredineae are enumerated by the 

 writer, the specimens in each case being referred to the herbarium where 

 the specimen recorded is to be found. The date of collection, the parts 

 of the host attacked, and the effect on the host, when that could be 

 observed, are recorded. The writer calls attention to various observa- 

 tions of ecological interest, describes as forms that have escaped notice 

 in systematic works the uredo spores of Uromyces Howei, Pk v Uromyces 

 pisiformis, Cke., and Uromyces Sparganii, C. & P., records the collection 

 of the rare (in this latitude) Ravenelia epiphylla (S) Dietel in Jackson 

 county, Mich., and adds important notes on distribution. 



