Davis—Notes on Parasitic Fungi in Wisconsin — TV. 689 
Cercospora crassa Sacc. On Datura Stramonium and Datura 
Met el and other species in the experimental drug garden at 
Madison. The type of Cercospora daturae Pk. was collected 
in June and appears to be a somewhat immature condition of 
the same fungus. In the Madison material zonation of the 
spots is conspicuous and vertical septa in the conidia are well 
developed and the fungus should be referred to Alternaria 
[This is Alternaria crassa (Sacc.) Rands. Phytopathology 
7:337]. 
Macrosporium saponariae Pk. which occurs in Wisconsin on 
leaves of Saponaria officinalis has not been recorded in any of 
the state lists of parasitic fungi. 
Ustilago violacea (Pers.) Fekl. was reported in the 4th sup¬ 
plementary list but was unintentionally omitted from the pro¬ 
visional list. It has been collected at Racine, Madison, and in 
Kenosha county in the anthers of Arenaria lateriflora. 
Puccinia uniporula Orton. On Carex gracillima. Racine. 
Puccinia karelica Tranz. On Carex paupercula irrigua. Price 
and Sawyer counties. 
The above species on Carex were determined by Dr. J. C. 
Arthur. 
SCLEROTIUM DECIDUUM n. sp. 
Mycelium hypophyllous, white, branched, continuous (?) 
3-4 m in diameter, at first effused but soon aggregated into 
rounded masses 0.1-3 mm. in diameter. The larger of the 
mycelial masses become compacted into grey, globose to elliptical 
sclerotia about 2 mm. in diameter which usually fall away be¬ 
fore mature. The affected leaf areas become pale and dead and 
usually studded with brown dots that mark the location of the 
mycelial ganglia. This was referred to in the supplementary 
list of parasitic fungi of Wisconsin, No. 495, as occurring on 
“Silphium, Helianthus, etc.” at Racine. The following hosts 
are represented by specimens in our herbaria: Adiantum peda- 
tum, Pteris aquilina , Aralia nudicaulis, Mitella diphylla, Dier- 
villa Lonicera, Steironema ciliatum, Solidago “canadensis,” 
Silphium terebinthinaceum. The paucity of specimens is be¬ 
cause of falling away of the sclerotia. 
UNIVERSITY OF WISCONSIN HERBARIUM, 
MADISON, WISCONSIN, APRIL, 1916. 
44—S. A. L. 
