92 Wisconsin Academy of Sciences, Arts, and Letters. 



doubtful. The New Jersey fungus is certainly not as conspicu- 

 ous as yours and produces no such leaf spots." 



Considering the differences in the hosts, it seems to me that 

 there is a variable Cladosporium on Hypericum to forms of 

 which these two names were applied. If that is the case I would 

 prefer the later name here used to avoid tautology. 



Cercospora fingens n. sp. Spots suborbicular, immargin- 

 ate, blackish brown, 3-5 mm.; conidiophores hypophyllous, 

 olivaceous brown, somewhat crooked, denticulate, thicker and 

 paler toward the apex, pluriseptate, 130-250x4^6/*; conidia hy- 

 aline, pluriseptate with a tendency to break apart at the septa, 

 somewhat flaccid, tapering upward, 100-215x3-5/*. On Thalic- 

 trum dasycarpum, Burnett, Washburn and Price Counties, 

 July-September. On Thalictrum dioicum, Lone Rock, (R. A. 

 Harper and G. M. Reed). Because of the long and slender hy- 

 phae and conidia this resembles, under a hand lens, PhytopJi- 

 thora thalictri Wils. & Davis for which it was mistaken in the 

 field. 



I was at first disposed to refer this to Cercospora aquilegiae 

 Kell. & Sw. but as no specimens have been collected on Aquil- 

 egia in Wisconsin, I infer that it is distinct. 



Puccinia microsora Koern. Amphi-and teleuto-spores on 

 Carex Tuckermani Price County and Carex scabrata, Bayfield. 



Coleosporium sonchi-arvensis (Pers.) Lev. II, III, on Sonchus 

 asper, I on Pirws sylvestris, Sturgeon Bay. The uredinia were 

 collected by Mr. J. G-. Sanders, Entomologist of the Wisconsin 

 Agricultural Experiment Station, who found it to be locally 

 abundant. The aecia usually appear upon but one of the paired 

 leaves. 



Herbarium of the University of Wisconsin, Madison Wis- 

 consin, March, 1913. 



