Preliminary List of Wisconsin Parasitic Fungi. 117 



77. MiCROSTROMA LEUCOSPORUM Mont . 



Forming white spots on the under surface of leaves of Jiiglans cin- 

 erea L. Represented from just across the line in Minnesota and 

 Illinois, and hence certain to be found in Wisconsin. It should 

 also occur on Carya. 



78. DiDYMARiA UNQERi Cda. (Raviularia didyma Ung.). 



On Ranunculus fascicularis Muhl., R. recurvatus 'Poir. and Ane7no7ie 

 dichotoma L. Madison; Kii'kland, La Crosse, Pammel. 



79. Eamularia celastri Ell. & Martin. (R. celastri Pk.). 



On leaves of Celastnis scandens L., in fall. Madison. 

 Spores 1-4 celled. Described under the tame name by Peck (33 Report, 

 p.' 30). 



80. Eamularia plantaginis Ell. & Martin. 



On leaves of Plantago major L. Madison, Syene; Kirkland, Pammel. 



81. Ramularia tulasnei Sacc. (R. fragariae Pk.). 



On leaves of Fragaria vesca L. and F. virginiana Ehr., wild and 



cultivated. Madison; Milwaukee, Trowbridge; Janesville, Kellogg. 



Known pretty generally over the country as " Strawberry Rust." 



With us this species appears to pass the winter in black, stromal old 



sclerotia, which protrude from the surface of the leaf. In the spring coni- 



dial threads grow out from these bodies and quickly fruit. 



82. Ramularia arvensis Sacc. 



Oa leaves of Potent ilia norvegica L. Madison, Syene; La Crosse, 

 Pammel. 



88. Ramularia macrospora Fres., var. senecionis Sacc. 

 On leaves of Aster novae angliae L. Syene. 

 To the naked eye resembling the conidia otEntyloma compositarum Farl, 

 Spores colorless, 1-4 celled, usually 2-celled; oblong-ovoid, slightly trun- 

 cate at the pointed extremities, sometimes narrowed gradually to the sep- 

 tum; 5-6X20-40 ;<. 



84. Ramularia armoraciae Fckl. 



Common on leaves of Nasturtium annoracia Fr., wild and culti- 

 vated. Madison. 

 The common leaf disease of the horseradish, very destructive to the old 

 leaves in summer and fall. Presumably occurring on other Cruciferae in 

 Wisconsin, as it does elsewhere. 



85. Ramularia urticae Ces. 



On Urtica gracilis Ait., in spring. MadisoH. 

 Agrees closely with Berlin specimens from Slagnus . 



