Davis—Parasitic Fungi of Wisconsin. 95 
ter. Peritheeia epiphyllous, globose, black, pierced 
above, 150-200 microns. Sporules of two ellip¬ 
tical or oblong biguttulate cells placed at various 
angles to each other; each cell 9-15 x 5-8 microns. 
On living leaves of Pyrus coronaria , Racine, 
Wisconsin, September. Ascochyta pyricola, Sacc., 
has sporules only 10 x 2 microns. 
580a. Ascochyta rophanthi, n. sp. 
On Lophanthus scrophulariifolius, Benth. Ra¬ 
cine and Kenosha county. Spots dark brown, defi¬ 
nite, round to oval, margin repand, 5-20 mm. 
diameter. Peritheeia globose, usually innate but 
sometimes formed just beneath the epidermis and 
forming minute papillae, 50-150 microns in diam¬ 
eter. Sporules short-cylindrical with rounded ex¬ 
tremities, constricted at the septum, 20-30 x 10-12 
microns. August and September. 
581. Ascochyta rhei, E. & E. 
On Rheum Rhaponticum, L. (cult.). Racine. 
(Dr. Erwin E. Smith.) 
582. Cercospora acarypitae, Peck. 
On Acaiypha Virginica , L. Racine. Conidia 
amphigenous but most abundant on the lower sur¬ 
face of the spots. Ilyphae about as long, as the 
conidia which sometimes attain a length of 150 
microns. 
583. Cercospora arismatis, Ellis & llolway. 
On Alisma Planbago, L. Racine. Collected 
but once. 
584. Cercospora boehmertae, Peck. 
On Boehmeria cylindrical Willd., var. scabra, 
Porter. Genoa Junction. 
585. Cercospora carrae, Pk. & Cl. 
On Calla palustris, L. Vilas county. In these 
specimens the spots are often 5 or 6 cm in length 
and the leaf is usually split through the spot. The 
