PLANTS OF IOWA 47 



521. P. grossularice, Sacc. 

 Leaf-spot on gooseberries. 



522. P. humuli, Sace & Speg. Var. major, E. & E. 

 On hop leaves. 



PHOMA. 



523. P. virginiana, Ell. & Halsted. 

 On leaves of Prunus virginiana. 



524. P. sanguinolenta, Rostr. 

 On carrots. 



525. P. solani, Hals. 

 On egg-plant. 



YERMICULARIA. 



526. V. sanguinea, Ell. & Halstead. 



On leaves of Panicum in grass plots and lawns. 



MELANCONIACE^I FAMILY. 



GLOCOSPORIUM. 



527. G. frutigenium, Berke. 

 Bitter-rot of apple. 



528. G. venetum, Spreg. 



On blackberries and raspberries. 



529. G. ribis, D. & M. 



On currants and gooseberries. 



530. G. potentillae, Desm. 

 On strawberries. 



531. G. violae, B. & Br. 

 On violets. 



COLLETOTRICHIUM. 



532. C. lindemutkianum, Sacc. 



Spot-rot of watermelon and pod-spot of beans. 



C YLINDROSPORIUM . 



533. C. iridis, Ell. & Halsted. 

 On living leaves of iris. 



534. C. padi, Karst. 



Abundant on cherry. Plum leaf blight. 



