316 



Mycologia 



condcnsatus made by Rev. F. D. Kelsey at Helena, Montana, July, 

 1 891. An examination of the type (Ellis & Ev., N. Am. Fungi 

 2892) shows that this rust is to be distinguished from the other 

 grass rusts having long-covered telia by the arrangement of the 

 uredinia and telia in lines, by the broad teliospores and the abun- 

 dant thin-walled paraphyses bordering the uredinia (fig. 1). In 



specimen of P. montanensis (x 400). 



191 5 Arthur 4 sowed aeciospores from Hydrophyllum capitatum, 

 obtaining uredinia and telia upon Agropyron tenerum and uredinia 

 upon Elymus virginicus. This material was determined as Puc- 

 cinia montanensis, and on this basis the Hydrophyllaceous and 

 Boraginaceous aecia of the United States have been considered as 

 belonging to this species. 



Aecial Relationship of Puccinia montanensis 



In the spring of 1919 two collections of Puccinia montanensis, 

 one upon Elymus canadensis and the other upon Agropyron sp., 

 made by H. S. Jackson at Boulder, Colo., Nov. 12, 1918, were 

 found to be viable. On the assumption that they should produce 

 aecia upon Boraginaceous or Hydrophyllaceous species, these col- 

 lections were sown on Myosotis palustris, Phacelia Purshii, Nyc- 

 telca Nyctelea, and Hydrophyllum sp. without obtaining infection. 

 Later in the same summer Mr. E. Bethel sent collections of a rust 

 on Agropyron tenerum, Agropyron Smithii and Hordeum jubatum 

 which he had collected with Dr. G. H. Coons at Mancos, Colo. 

 Accompanying this material was a collection of aecia on Berberis 

 Fendlcri, which he stated was so closely associated with the grass 

 rust as to suggest relationship. Such an association did not neces- 



* Arthur, J. C. Cultures of Uredineae in 1915- Mycologia 8: i37~i39- 

 1915. 



Fig. 1. Teliospores, urediniospore and uredinial paraphysis front the type 



