266 Wisconsin Academy of Sciences, Arts, and Letters. 



Ramularia spiracae Pk. On Physocarpus opulifolius. Maiden 

 Rock. Also observed at Dresser Junction, but too late in the 

 season to secure good specimens. 



Ramularia ionophila n. sp. 



Spots at first indefinite, green, angular, becoming suborbicu- 

 lar to irregular and more definite but not margined ; conidio- 

 phores hypophyllous, hyaline, fasciculate from a more or less 

 prominent stromatie base, straight or somewhat bent, continuous, 

 25-55 x 3— ifi ; conidia hyaline, apical or subapical, cylindrical, 

 straight, 1-3 septate, 18-45 x 3-4/a. On Viola canadensis Phlox, 

 Wisconsin, July 1911. It may be that more knowledge of the 

 Ramularias occurring on violets will bring together this and sev- 

 eral other described species. The apex of the conidiophore fre- 

 quently grows beyond the point where the conidium is borne. 



Cercosporella scirpina n. sp. 



On elongate brown areas, which become confluent; conidio- 

 phores in small tufts disposed in long intervenular lines, hya- 

 line, continuous, subulate to cylindrical, often bent and denticu- 

 late above, 15-22 x 4-7 /a; conidia hyaline, straight or curved, ob- 

 clavate- cylindrical, obscurely septate, 50-122 x 3/x. On leaves 

 of Scirpus pedicellatus. St. Croix Falls, August 25th, 1914. 



Cercosporella filiformis n. sp. 



Spots linear, brown, immarginate, %-4 cm. x 1-2 mm. ; conid- 

 iophores amphigenous, fasciculate, hyaline, continuous, somewhat 

 lax, 10-15 x 1-2/x ; conidia apical, filiform, hyaline, more or less 

 curved and lax, sometimes pseudoseptate, 30-75 x 1-2/x. On 

 leaves of Anemone patens var. Wolfgangiana. Millston, "Wis- 

 consin, June, 1914. 



Cercosporella trichophila n. sp. 



Effused over indefinite areas on the lower surface of the leaves 

 which are not discolored ; mycelium hyaline, superficial, repent 

 and ascending the trichomes ; conidiophores racemose on the hy- 

 phae, hyaline, cylindrical to nodulose, straight, often oblique or 

 denticulate at the apex, 10-15 x 3-5/a ; conidia hyaline, obclavate- 

 cylindrical, curved, pluriseptate, 45-75 x 3/*. On Fraximus 

 pennsylvanica. Bridgeport, Wisconsin, August 1914. The conid- 

 iophores and conidia develop especially on the trichomicolous hy- 



