Davis—Parasitic Fungi in Wisconsin — 11. 
103 
Septoria alni Sacc. On Alnus incana. Wausaukee. Re¬ 
ferred to this species because of the short sporules, the longest of 
which attain 40//.. 
Septoria hepaticae 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//, 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 cylindrospermum (Bon.) Sacc. On Alnus in¬ 
cana. Madison. 
Marssonina neilliae (Hark.) Magn. On Physocarpus opulifol- 
ius. Wausaukee. Macroscopically this resembles Entomospor- 
ium. Marssonina coronaria (Ell. & Davis) is similar and doubt¬ 
less closely related. 
Marssonina baptisiae (E. & E.) On Baptisia leucantha. 
Bridgeport. The globose acervuli are not subcuticular, as one 
might infer from the description, but subepidermal or innate. 
Sporules as long as 33//. 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// 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. 
