352 GEOLOGY OF OHIO. 



124. PODOSPH^RA Kunze. 



PODOSPH^RA OXYACANTH^E (DC.) D. By. 



Quite common on plum and cherry. On cultivated cilery, Columbus, C. M. 

 Weed, Freda Detmers ; Dayton, Joseph Potts ; on Spirea tomentosa ( hodos- 

 phcera minor Howe) Lancaster, W. A. Kellerman. 



125. MICROSPH.ERA Lev. 



Microsph^Era alni (DC.) Winter. Lilac Mildew. 



This species occur on a wide range of host plants. Everywhere upon Lilac : 

 on Enonymus atropurpureus (conidial stage only ); Ross Co., W. A. Keller- 

 man ; Columbus, Aug. D. Selby ; on Sambucus canadensis, Columbus, Aug. 

 D. Selby; on Platauus occidentalis (conidial stage) Columbus, Aug. D. 

 Selby; on Castanea sativa americana, Fairfield Co., E. V. Wilcox, E. E. Bogue, 

 C. M. Weed ; Ross Co., W. A. Kellerman. 



MlCROSPH^ERA DIFFUSA C. & P. 



On Desmodium cauescens, Columbus, C. M. Weed, Freda Detmers, Aug. D. 

 Selby. 



MiCROSPH^RA ELEVATA Burrill. 



On Catalpa bignonoides, Columbus, C. M. Weed. 



Microsph^Era euphorbia B. & C. 



On Euphorbia corollata, Columbus, E. M. Wilcox. 



MiCROSPH^ERA QTJERCINA (Schw.) Burrill. 

 General on the oaks. 



MiCROSPH^ERA RAVENEEH Berk. 



On Gleditschia triacanthos, Columbus, C. M. Weed, W. A. Kellerman ; Warren 

 Co., Ross Co., Fairfield Co., W. A. Kellerman. 



MlCROSPH^ERA RUSSEUJI Clint. 



On Oxalis stricta, Columbus, W. A. Kellerman, on Oxalis recurva, E. M. Wi'cox. 



MiCROSPH-ERA vaccinii (Schw.) C. & P. Huckleberry Mildew. 



On Gaj'lussacia resinosa, Fairfield Co., Aug. D. Selby; on Vaccinium vacillans, 

 Meigs Co., P. L. Pfarr ; Fairfield Co., Aug. D. Selby. 



XVII. PERISPORIACE.E. 



126. ASTERINA Liv. 



ASTERINA GAULTHERI^E Curtis. 



On Gaultheria procumbens, Fairfield Co., Aug. D. Selby, W. A. Kellerman. 



126a. DIMEROSPORIUM Fckl. 



Dimerosporitjm coixinsii (Schw.) Thuem. 



On Amelanchier, Fairfield Co., W. A. Kellerman. 



