428 MINNESOTA BOTANICAL STUDIES. 
7. Erysiphe galeopsidis DC. Flore Franc. 6: 108. 1815. 
On leaves of: 
Stachys palustris L.: Lincoln, Aug., 1891, Sheldon 
15723; Lincoln, Aug., 1891. Sheldon 1261. 
Seymour reports this species on Stachys palustris at De- 
troit, Minnesota. 
8. Erysiphe graminis DC. Flore Franc. 6: 106. 1815. 
On leaves of: 
Poa pratensis L.: Waseca, June, 1891, Taylor 228. No 
perithecia found. Conidial stage (Ozdzum monthotdes 
Link) only is present. 
9g. Uncinula salicis (DC.) Wint. Die Pilze 17: 40. 1887. 
On leaves of: 
Salix sp. indet.: Winona, Sept., 1888, Holzinger; Chi- 
sago, Sept., 1891, Sheldon 4263; Traverse, Sept., 1892, 
Sheldon 7172; Traverse, Sept., 1892, Sheldon 7013; 
Chisago, Aug., 1892, Taylor 1634; Otter Tail, July, 
1892, Sheldon 3936; Hennepin, Oct., 1893, Sheldon 
4093; McLeod, Aug., 1. J. McElligott ; Traverse, Sept., 
1893, Sheldon 7069; Ramsey, Sept., 1898, Freeman 60. 
Salix bebbtana Sare. : Chisago, Sept., 1891, Sheldon 4246. 
Salix myrtillordes L.: Otter Tail, July, 1892, Sheldon 
35732: 
Salix discolor Munu.: Hennepin, Oct., 1893, Sheldon 
4089. 
Populus deltoides MArsu.: Hennepin, July, 1889, Shel- 
don; Hennepin, Oct., 1889, MacMillan; Wabasha, 
Sept., 1893, Edna Porter. . 
Populus grandidentata Micux.: Hennepin, 1890, Mac- 
Millan. 
Populus tremulotdes Micux.: Goodhue, Aug., 1893, An- 
derson 707. 
Populus sp. indet. Hennepin, Oct., 1889, MacMillan. 
Seymour reports UW. salic’s on Salix sp. at Lake Minne- 
tonka. 
10. Uncinula clintonii Peck, Rep. N. Y. St. Mus. 25: 96- 
Eo7gen,atans. Alb. Inst. 72270. 
On leaves of: 
Tilia americana L..: Winona, Sept., 1888, Holzinger. 
i i 
