Davis—Parasitic Fungi in Wisconsin-Ill. 
267 
phae. The leaf surface becomes dotted with black, globose to 
hemispherical, sclerotioid bodies apparently connected with the 
same mycelium. Microscopically this fungus suggests a young 
Erysiphea. Its systematic position is not clear. 
Cercospora camptosori n. sp. 
Spots subcircular to angular, pale brown becoming dark brown 
with age, immarginate, 3-7 mm. in diameter; conidiophores am- 
phigenous, more or less fasciculate, brown, usually undulate, nod¬ 
ulose or bent, sometimes 1-2 septate, 18-57 x 3-4 /a ; conidia hya¬ 
line, obclavate-cylindrical to flagelliform, straight, 40-100 x 3/a. 
On Camptosorus rhizophyllus. Marquette State Park, Grant 
County, Wisconsin. August 1st, 1914. This differs from Cer- 
cospora phyllitidis Hume, as described, in the shorter conidio¬ 
phores. 
Cercospora muhlenbergiae Atk. On Muhlenbergia sylvatica. 
Kenosha County. 
Cercospora comandrae Ell. & Dearn. On Comandra umbel- 
lata. Trempealeau. Curved and nodulose conidiophores are 
not infrequent. 
Cercospora sanguinariae Pk. On Sanguinaria canadensis. 
Phlox. 
Cercospora erysimi n. sp. 
Spots pallid, subcircular, 3-5 mm.; conidiophores amphigen- 
ous, fasciculate, fuligineous, simple, straight or somewhat in¬ 
curved, 30-55 x 3-4/a ; conidia straight, obclavate, fuligenous 
tinted, about 5- septate, 45-75 x 3-4/a. On leaves of Erysimum 
cheiranthoides. Alma, Wisconsin, August 13th, 1914. 
Cercospora condensata E. & K. On Gleditsia triacanthps. 
Marquette State Park near Wyalusing. Conidia up to 110/a in 
length were noted. 
Cercospora negundinis Ell. & Evht. On Acer Negundo. 
Galesville and Alma. In this collection the conidia are hypo- 
phyllous; the conidiophores range to 40-50/a and the conidia to 
150/a in length. As many as 9 septa have been observed in the 
latter. The conidiophores are mostly scattered or in twos and 
threes. Also collected in Grant County with amphigenous 
conidia and at Bridgeport. 
