Davis—Parasitic Fungi in Wisco?isin — III. 263 
lowish becoming brown below, light green above, about % cm. 
in diameter, sometimes confluent; asci hypophyllous, broad and 
truncate or somewhat rounded at base, obtusely rounded at apex, 
often more or less coustricted in the middle, 30-36 x 18-26/a. 
No stalk cell is produced. The constriction of the asci appears 
to be caused by the pressure of the encircling edge of ruptured 
cuticle and to be greater when the asci are scattered. 
Phyllosticta populina Sacc. On Populus deltoides. Prescott. 
The light grey spots are circular to subcircular with a narrow 
brown margin, 4—8mm. in diameter. It was associated with a 
Septoria. 
In Ellis & Everhart’s “The North American Phyllostictas 9 ’ 
under Phyllosticta grossulariae Sacc. reference was made to Wis¬ 
consin material on Ribes floridum (= R. americanum ) but it ap¬ 
pears not to have been placed in my herbarium and was not re¬ 
corded in the provisional list. I have found it on Ribes vulgare 
(cult.) at Fountain City accompanying Cylindrosporium ribis 
but mostly immature. 
Phyllosticta crataegi (Cke.) Sacc. On Crataegus. Maiden 
Rock. This appears to be very close to what has been called 
Phyllosticta destruens Desm. on Prunus virginiana and Amel- 
anchier. 
Vermicularia liliacearum West. Specimens on leaves of 
Streptopus roseus appear to be parasitic as one might perhaps 
ex-pect from the relation of this fungus to Colletotrichum by rea¬ 
son of its imperfect pycnidia. The sporules are narrow 
(3-4/a) in this collection. 
Placosphaeria punctiformis ( Fckl.) Sacc. On Galium bone ale. 
Bridgeport. The spermogonial state of Pseudopeziza repanda 
(Fr.) Karst. 
Ascochyta marginata n. sp. Spots circular to subcircular, 
5-15 mm. in diameter, at first green becoming brown with a 
paler central portion and a darker periphery and a distinct nar¬ 
row margin; pycnidia epiphyllous, scattered, pale brown, irregu¬ 
larly globose, about 100/a in diameter with a thin cellular wall 
and a dark ring around the pore; sporules hyaline, ovoid to ob¬ 
long with rounded ends, some of them uniseptate, 6-12 x 2-3%/a. 
