The Eusts of Nova Scotia. — By William Pollock 

 Feaser, M. a., Macdonald College, P. Q. 



Head 23rd May, 1910. 



This paper embodies the results of field and microscopic 

 studies of the rusts of JSTova Scotia carried on during the years 

 1908 and 1909.* A few collections were made in 1906 and 

 1907, but careful and systematic study was begun in the 

 summer of 1908 and has been continued since that time. The 

 most of the collections were made near Pictou and in the 

 surrounding districts, so that it might seem more appropriate 

 to name the paper "The Rusts of Pictou County," but it was 

 thought best to include all the collections made in the province, 

 thus the more inclusive title is used. 



Scarcely any attention has been given to this interesting 

 group of fungi in ISTova Scotia. The only references that have 

 been found are in Dr. MacKay's "Fungi of Xova Scotia" and 

 "First Supp. List." In these papers (Trans. IST. S. Inst, of 

 Science, 11:141. 1905; 12:124-126. 1908), the following 

 species are listed: Puccinia graminis, Gymnosporangium 

 Juniperi, Gymnoconia interstitialis, C oleosporium Solidaginis, 

 Melampsora Medusae, Puccinia acuminata, P. Taraxaci, P. 

 sessiUs (?), P. suaveolens, P. coronata, P. Menthae, P. 

 Circaeae, P. Cicutae, P. Violae, P. Asteris, P. orbiculata, 

 P. claytoniata, P. ruhigo-vera, Uromyces Trifolii, U. caladii, 

 Phragmidium suhcorticium, TripJiragmium clavellosum, 

 Chrysomyxa Pirolae, and the fonns Rostelia lacerata, Uredo 

 Agrimoniae, Periderminm haJsameum, Per. decolorans and 

 Per elatinum. 



Of the species named in Dr. !^^acKay's list T now regard 

 Phragmidium suhcorticium as Phragmidium americanum. 

 Uredo Agrimoniae is the uredinial stage of Pucciniastmm 



* Revised to include collections and studies during 1910 and 1911. 



(313) 



