PLANTS OF IOWA 49 



Gymnosporium. 



550. G. harknessioides, E. & Hoi. 



On leaves of Phyrma leptostachya and on various other 

 living leaves. 



MONILIACE^ FAMILY. 

 MONILIA. 



551. M. fructigena, Pers. 



Abundant late in season on fruit of Primus americana. 

 Rot and blight of plum and peach. 

 Ramularia. 



552. R, astragali, E. & Hoi. 

 On Astragalus canadensis. 



553. R. subrufa, Ell. & Hoi. 

 On leaves of smilax. 



554. R. c one omit ans, Ell. & Hoi. 

 On leaves of Bidens. 



555. R. urticce, Ces. 



On TJrtica gracilis. 



556. R. desmodii, Cke. 



On leaves of Desmodium. 



557. R. ftlaris, Fries. 

 On leaves of asters. 



558. R. didyma, linger. 



On Ranunculus pennsylvanicus. 



DEMATIACE^E FAMILY. 



Cladosporium. 



559. G. carpophilum, Thum. 



Rare on Primus americana, but abundant on Cratccgus 

 mollis late in August and September. Plum scab. 



560. C. herbarum, (Pers.) Link. 

 On wheat and other plants. 



561. C. fulvum, Cke. 

 Leaf mould of tomato. 



Fusicladium. 



562. F. dentriticum, Fckl. 

 Apple scab. 



