PLANTS OF IOWA 4$ 



GYMNOSPORIUM. 



550. G. harknessioides, E. & Hoi. 



On leaves of Phyrma leptostachya and on various other 

 living leaves. 



MONILIACE.E FAMILY. 

 MONILIA. 



551. M. fructigena, Pers. 



Abundant late in season on fruit of Prunus americanm~ 



Hot 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. concomitans, Ell. & Hoi. 

 On leaves of Bidens. 



555. R. urticce, Ces. 



On Urtica gracilis. 



556. R. desmodii, Cke. 



On leaves of Desmodium. 



557. R. filaris, Fries. 

 On leaves of asters. 



558. R. didyma, linger. 



On Ranunculus pennsylvanicus. 



DEMATIACE^G FAMILY. 



CLADOSPORIUM. 



559. C. carpopliilum, Thum. 



Rare on Prunus americana, but abundant on Cratcegw 

 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. 



