Davis — Parasitic Fungi in Wisconsin — II. 103 



Septoria alni Sacc. On Alnus incana. Wausaukee. Re- 

 ferred to this species because of the short sporules, the longest of 

 which attain 40/a. 



Septoria liepaticae Desm. On Hepatica acutiloba. Glen Hav- 

 en. I have collected this but once when it occurred in connection 

 with Protomyces fuscus Pk. 



Septoria cassiaecola Kell. & Swingle. On foliage leaves of 

 Cassia chamaecrista. Glen Haven. Amphigenous on interven- 

 ular areas of the leaflets which are not at first discolored but 

 which become brown. 



Septoria senecionis-aurei n. sp. ad interim. On irregular 

 indefinite grey portions of large brown areas of the radical leaves. 

 Pycnidia epiphyllous, scattered, brown black, spherical, with a 

 distinct cellular wall, 55-65/x in diameter; sporules hyaline, 

 straight, 16-26 x 1/x. On Senecio aureus. Devils Lake, Septem- 

 ber 1, 1913. I use this name for convenience until the relation 

 of the fungus to previously described forms such as Septoria 

 senecionis-sylvatici Syd. and S. adenocauli E. & E. becomes 

 known. 



Gloeosporium cylindrospcrmum (Bon.) Sacc. On Alnus in- 

 cana. Madison. 



Marssonina neilliae (Hark.) Magn. On Physocarpus opulifol- 

 ius. Wausaukee. Macroscopically this resembles Entomospor- 

 ium. Marssonina coronaria (fill. & Davis) is similar and doubt- 

 less closely related. 



Marssonina baptisiae (E. & E.) On Baptisiak leucantha. 

 Bridgeport. The globose acervuli are not subcuticular, as one 

 might infer from the description, but subepidermal or innate. 

 Sporules as long as 33/t were observed. Septation of the spor- 

 ules seems doubtful. 



Marssonina rhabdospora (E. & E.) Magn. A collection on 

 leaves of Populus grandidentata made on the bank of the Wis- 

 consin river opposite Bridgeport September 18, 1913, bears 

 hypophyllous subcuticular acervuli which are applanate to 

 hemispherical, 75-150/j. in diameter. The affected leaf areas 

 are first yellow, then brown, then indefinite sordid spots ap- 

 pear which become determinate, orbicular, arid, zonate, 3-5 mm. 



