Davis—Parasitic Fungi in Wisconsin — II. 
97 
in Entyloma nymphaeae (Gunn.) Setch. (Trans. Wis. Acad. Sci. 
Arts & Letters 77:176) and is probably correlated with the 
aquatic habit. It seems to be of service in increasing the flotation 
of the sporidia and the likelihood of their catching upon the 
host. That this method of detachment is not constant, however, 
is indicated by the fact that Setchell does not mention it in his 
account of the germination of the spores of this species but re¬ 
fers to the sporidia as falling from the promycelia. (Bot. Gaz. 
73:188 [1894].) 
Additional Hosts. 
Not previously recorded as bearing the fungi mentioned in 
Wisconsin. 
Peronospora parasitica (Pers.) Tul.—On Arabis hirsuta . Fish 
Creek. 
Synchytrium aureum Schroet. A few galls on Caltha palustris 
apparently caused by this fungus were collected at Wausaukee 
in August, 1913, but the material is scanty and immature. 
Plasmopara pygmaea (Ung.) Schroet. Conidia and oospores 
on Hepatica triloba. Afton. 
Peronospora grisea Ung. On Veronica americana. Ellison 
Bay. 
Sphaerotheca nwrs-uva& (Schw.) B. &. C. on Ribes gracile. 
Detroit Harbor. 
MicrospJiaera alni (Wallr.) Wint. On Alnus incana. Wau¬ 
saukee. Perithecia sparse. 
Dimerosporium collinsii (Schw.) Thuem. On Amelanchier, 
oblongifolia. Merrimack, May 3rd, 1913. (W. N. Steil). On 
leaf of preceding year but ascospores not yet formed. 
Exoascus confusus Atk. On fruit of Prunus virginiana. Stur¬ 
geon Bay. 
Exoascus insititiae Sadeb. On Prunus pennsylvanica. Stur¬ 
geon Bay, causing witches brooms. 
Exoascus cerasi (Fckl.) Sacc. On Prunus Cerasus (cult.) 
Wyalusing. 
7—S. A. 
