Fraser: Cultures of Heteroecious Rusts 133 



The marked morphological departure from the Puccinia type 

 by the teliospores of the Bromus rust used in the culture, make 

 it doubtful whether it should be included in the genus Puccinia. 

 The character seems fixed as many collections made at Brandon 

 showed this character, as well as collections made on Bromus 

 latiglumis (Shear) Hitchc. at Brandon, and Morris, Man. As 

 its other characters and life cycle show a close relation with Puc- 

 cinia Agropyri, it seems best to include it here until further study 

 determines its true position. 



Summary 



Uromyces Alopecuri Seym. Aeciospores from Ranunculus 

 Macounii Britton infected Alopecurus aristulatus Michx. 



Puccinia angustata Peck. Teliospores from Scirpus atrovircns 

 Muhl. infected Mentha canadensis L. 



Puccinia Impatientis (Schw.)Arth. Aeciospores from Im- 

 patiens biflora Walt, infected Hordeum jubatum L. 



Puccinia Phragmitis (Schum.) Koern. Teliospores from 

 Phragmitis communis Trin. infected Rumex Sp. 



Puccinia Agropyri E. & E. Aecispores from Thalictrum dasy- 



carpum Fisch. & All. infected Elymus canadensis L., E. virginicus 



L., Hordeum jubatum L. and Bromus ciliatus L. Uredospores 



from Bromus ciliatus L. failed to infect Elymus virginicus L., 



Agropyron Smithii Rydb., A. tenerum Vasey, A. repens (L.) 



Beauv. and Hordeum jubatum L. 



Dominion Laboratory of Plant Pathology, 

 University of Saskatchewan, 

 Saskatoon, Sask. 



