1; 3 25^ Mycologia 



or European investigators. The extension of aecial hosts for 

 Puccinia Seymonriana to two families not closely related to the 

 one previously known is especially important, and the behavior of 

 rye rust upon Anchusa appears to have significance. 



i. Puccinia extensicola Plowr. (P. Dulichii Syd.). A col- 

 lection of this rust on Dulichium arundinaceum, made at DeMotte, 

 in the Kankakee marshes of northern Indiana, by Mr. H. E. Ford 

 and the writer on April 6, 1915, was sown April 19, on two 

 plants of Aster paniculatus, one brought from the spot where the 

 collection was made, and the prevailing plant at the place, and also 

 on a plant of Solidago canadensis. Abundant pycnia began to 

 show on the Solidago April 26, and aecia May 9, while the two 

 Aster plants were unaffected. The result agrees with the facts 

 obtained in 1914 9 with similar material from Florida. 



2. Puccinia Grossulariae (Schum.) Lagerh. Material col- 

 lected by Mr. Roy Latham at Greenport, Long Island, N. Y., on 

 Carex tenuis, was sown March 25 on Ribes floridum with no in- 

 fection, and March 31 on R. Cynosbati, giving rise to pycnia April 

 13, and aecia May 4. The aeciospores thus produced were sown 

 May 4 on Carex pubescens, with no infection. Another collec- 

 tion made by C. H. Kauffman and E. B. Mains at Lake Placid, 

 N. Y., on Carex arctata, was sown March 15, on Ribes Cynos- 

 bati, giving a few pycnia March 26, but failing to develop further 

 on account of injury to host. The same material was sown again 

 March 26 on another plant of the same sort, giving pycnia April 

 2, and aecia April 26, the growth being slow. Both the original 

 telial collections gave many urediniospores, all of which appeared 

 to have but one basal pore, and they may be considered pure rep- 

 resentatives of Puccinia unipornla Orton. The aecia were not 

 distinguishable from those grown in previous years from material 

 showing equatorially three-pored urediniospores. It was hoped 

 that aecia so grown might be carried back to the telial host, and 

 the character of the resulting urediniospores ascertained, but al- 

 though an attempt was made, it failed. 



A collection of aecia on Ribes longiflorum sent from Denver, 

 Colo., by Mr. E. Bethel, was sown June 4, two days after collec- 



9 Mycol. 7: 81. 1915. 



