Preliminary List of Wisconsin Parasitic Fungi. Ill 



26. Peronospoba lophanthi Farlow. 



On Lophanthus scroplmlariaefolius Benth. La Crosse, Pammel. 



27. Peronospora schleideniana DeBary. 



On leaves of Allium eepa L. 

 Cal'ed "onion-rust," and very destructive. 



28. Peroxospora graminicola (Sacc.) (Protoinyees graminieola Sacc, 



Peronofpora setariae Pass.). 

 On Jeaves of Setaria viridis Beauv. and S. italica Kunth. La Crosse, 

 and Hokah, Mian., Paninael. 

 The oospores give some leaves a decided brown color. Conidial branches 

 sparingly produced. 



ASCOMYCETES. 



GYMNOASCI. 



29. EXOASCUS PRUNI Fckl. 



On the fruit of PniUMs, c lusing " plum pockets"' or '■ bladder plums." 

 Stoughton: Ahnapce, Swaty; Ithaca, Hatch. 



30. Ascomyces coerulescens Mont. 



On leaves of Quercus coccinea Wang, and Q. rubra L. Stoughton; 

 Kirkland, La Crossp, Pammel. 



PERISPOmACEAE. 



31. Uncinula ADUNCA (Wall.) (U. heUciformis Howe). 



Common, in fall, on species of Salix, and on Populus balsamifera 

 L., var. candicans Gray. 



32. UxciNULA SUBFUSCA B. & C . (U. ampelopsidis Peck). 



On Ampelopsis quinquefolia Mich. Madison; LaCrosse, Pammel. 

 This is given the name of Bei'keley and Curtis on the authority of Cooke 

 — Journ. Roy. Hort. Soc, 1878, p. 72. 



33. Uncinula Americana Howe {U. spiralis B. & C). 



On leaves of cultivated grajie, in the fall. Syene. 



34. Uncinula circinata C. & P. 



On leaves of Acer rubrum L. Ithaca. 



85. MiCROSPHAERA EUPHORBIAE B. & C. 



On Euphorbia corollata L. Madison; La Crosse, Pammel. 



36. Microsphaera friesii Lev. 



On Syringa vulgaris L., very common, disfiguring the lilacs in sum- 

 mer and fall. Madison. 



