146 IOWA ACADEMY OF SCIENCES. 



S. Mors-uvae (Schw.) Berk & Curr. 



Abundant on Ribes Grossulariae, R. floridum, June, July; 

 leaves, stem and fruit. 

 PhyUactinia suffulta (Reb.), Sacc. 



Abundant on Fraxinus Americana, August and September. 

 Uncinula necator (Schw.) Burrill. 



Common on Vitis Labrusca, Concord, Worden and especi- 

 ally Roger hybrids (Agawam). 

 MicrosjjJicera Aim (D. C) Wint. 



Abundant on Syringa vulgaris, S. Persica, Lonicera, August 

 and September. Abundant latter part of August and 

 September. 

 ErysipJie Cichoracearum D. C. 



Very abundant on Helianthus annuus, H. tuberosus. Not 

 so common on H. grosseserratus. Abundant on Ambro- 

 sia artemisiaefolia, A. trifida, Artemisia, Ludoviciana; 

 generally attacked by Cicinnobulus Cesatii. Abundant 

 on Verbena stricta; less common on V, hastata. 

 E.. communis (Wallr.) Schl. 



Abundant on Rannuculus abortivus and Amphicarpasa 

 monoica. 



SPH^RIACE^. 



Physalospora BidwelUi (Ell.) Sacc. 

 None observed in 1895. 



DOTHIDEACEyE. 

 PJiyUadwra Gramims (Pers.) Puck. 



Common on Muhlenbergia Mexicana, Elymus Canadensis, 

 Panicum scoparium Asprella hystrix. 

 P. TTifolii' (Fers.) Fnc'k. 



Abundant, conditial stage on Trifolium pratense, September. 

 Plmurigldia moi'hosa (Schw.) Sacc. 



Abundant on Prunus domestica, P. Padus, ani wild P. 

 Americana, P. Virginiana and Japan pium. 



GYMNOASACE.^E. 



Exoascus communis Sadebeck. 



Rare on Prunus Americana in 1895; abundant on Prunus 

 Cerasus and P. domestica. Nursery stock defoliated in 

 August. Not as severe on P. Americana. Also 

 occurred on P. Mahaleb and P. avium. 



HYPHOMYCETE.^-M UCEDINE.^. 



3Ionilia fructigena Pers. 



Abundant late in season on fruit of Piunus Americana. 



