130 
Mycologia 
or European investigators. The extension of aecial hosts for 
Puccinia Seymouriana 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. 
1. Puccinia extensicola Plowr. (P. Dulichii Syd.). — A col- 
lection of this rust on Dulichitim 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® 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 floriduni with no in- 
fection, and March 31 on R. Cynoshati, giving rise to pycnia April 
13, and aecia May 4. The aeciospores thus produced were sown 
]\Iay 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 uniporula 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. 
