Fraser: Cultures of Heteroecious Rusts 131 



on Rumex occidentalis Wats, and R. mexicamis Meisn. in the 

 field in the vicinity of the rusted Phragmites which belong to this 

 species. Dr. Arthur (Bot. Gaz. 29: 269. 1909. Jour. Mycol. 9: 

 220. 1903; 14: 15. 1908. Mycol. 2: 225. 1910; 4: 54. 1912) has 

 conducted several successful cultures with this species. 



PucciNiA Impatientis (Schw.) Arth. 



Aecia were found abundantly on luipatiens biflora Walt, at 

 Dauphin, Man., and field evidence strongly suggested their con- 

 nection with a rust on Hordeum jiibatitm 'L. On July 15 three 

 pots of Horedum jubatum and one of Triticiim vulgare L. were 

 inoculated with fresh aeciospores. Uredinia were noticed on all 

 the pots of Hordeum jubatum on July 25 and an abundant de- 

 velopment of urediniospores followed. Telia began to form on 

 August 2. The leaves of wheat flecked but there was no develop- 

 ment of uredinia. 



Further study is necessary to determine the systematic position 

 of this rust, but it seems best for the present to place it with 

 Puccinia impatientis which Arthur (Bot. Gaz. 35. 18. 1903. 

 Jour. Mycol. 10: 11. 1904; 11: 57. 1905. Mycol. 2: 226. 1910) 

 has shown to have aecia on Impatiens and telia on Elyiuus. It is 

 very common on Hordeum jubatum in northern Manitoba. 



Puccinia Agropyri E. & E. 



In the vicinity of Brandon in many places aecia were common 

 on species of Thalictrum. Field evidence indicated very strongly 

 their connection with a sub-epidermal rust on Bromus ciliatus L. 

 and B. latiglumis (Shear) Hitchc. There was also some evi- 

 dence of connection with Puccinia Agropyri E. & E. on species of 

 Elymiis and Agropyron. On June 18 inoculations were made with 

 aesciospores from Thalictrum dasycarpum Fisch. & All. collected 

 at Brandon on the following grasses : Elymus canadensis L., E. 

 virginicnsl^., Agropyron tenerum Ya.sey, A. Richardsonii Schrad., 

 Hordenm jubatum L. and Triticum vulgare L. Uredinia ap- 

 peared on E. canadensis on June 30, followed by telia on July 20. 

 On E. virginicus uredinia were noticed on June 28 and telia by 



