454 
10 HYALOPSORA POLYPODII (DC.) Magn. 
Uredo polypodii DC. 
On Felix fragilis (L.) Underw. (Cystopteris fragilis (l.) Bernh. 
1893 :56. 1903:143. 
Putnam, 1893 (Underwood Ind. Biol. Survey 53). 
*11. MELAMPSORA ABIETIS-CANADENSIS (Farl.) Ludwig. 
On Populus deltoides Marsh. 
Jasper, 1913 (Arthur & Fromme). 
On Populus grandidentata Michx. 1893:51. 
Putnam, 1893 (Underwood Ind. Biol. Sur. 50). 
On Populus heterophylla L. 
Tippecanoe, 1914 (Ludwig). 
On Populus tremuloides Michx. 
Steuben, 1903 (Kellerman). 
Some of above collections were previously recorded in the 
Proceedings as M. Medusae Thiim. 
12. MELAMPSORA BIGELOWII Thum. — 1908:89. 
On Salix amygdaloides Anders. 1903:143. 
Lagrange, 1907 (Arthur); Steuben, 1903 (Kellerman). 
On Salix cordata Muhl. 1893:51. 1905:180. 
Hamilton, 1905 (Wilson); Montgomery, 1893 (Olive); Tippecanoe, 
1904 (Arthur). 
On Salix discolor Muhl. 1893:51. 1896:218. 
Montgomery, 1890 (Fisher); Tippecanoe, 1896 (Snyder). 
On Salix interior Rowlee (S. longifolia Muhl.) 1893:51. 1905:180. 
Hamilton, 1905 (Wilson); Johnson, 1890 (Fisher); Montgomery, 
1893 (Olive); Marion, 1905 (Wilson); Owen, 1893 (Under- 
wood Ind. Biol. Sur. 49); St. Joseph, 1904 (Cunningham); 
Steuben, 1903 (Kellerman); Tippecanoe, 1898 (Stuart). 
On Salix nigra Marsh. 1893:51. 
Henry, 1915 (Jackson); Montgomery, 1890 (Fisher); Tippecanoe, 
1887 (Arthur). 
On Salix Wardii Bebb. (1893:51 as S. nigra Marsh.) 
Johnson, 1890 (Fisher). 
Following frequent usage of American authors this species 
has been variously referred to in the Proceedings as Melampsora 
