IOWA ACADEMY OF SCIENCES. 143 



U. Trifolii (Hedw.) Lev. 



Abundant in September on Trifclium pratense. This fun- 

 gus has been increasing in severity, large patches of 

 second crop of clover being affected. 

 U. appendiculatus (Pers.) Link. 



Abundant on Strophostyles angulosa, but not observed 

 here on Phaseolus vulgaris. At Indianola it was, 

 however, destructive to the cultivated bean. 

 U. Euphorbia Cooke & Peck. 



Abundant in August and July on Euphorbia maculata and 

 E. Preslii. 

 Melampsora farinosa (Pers.) Schroet. 



Abundant on Salix, August and September. 

 M. Populina (Jacq.) Lev. 



Abundant on Populus monilifera, August and September. 

 Puccinia Helianthi Schw. 



Abundant on Helianthus tuberosus and H. grosse-serratus 

 July, August and September. In August especially 

 destructive to cultivated Helianthus animus. 

 P. Convolvuli (Pers.) Cast. 



Abundant on Convolvulus sepium July, August and Sep- 

 tember. 

 Gijmnosporangium macropus Link. 



Teleuto stage on Juniperus Virginiana not as abundant as 

 in 1894; nor was the sgcidium (Roestelia pyrata) so 

 abundant on Pyrus Iowensis. Locally, however, in 

 Madison county it seriously affected the leaves, stems 

 and fruit of the wild crab. May was unfavorable for 

 the germination and development of the teleutospores. 

 Fhragmidum subcorticium (Schrank.) Winter. 



Abundant on the leaves of the cultivated rose, as Madam 

 Charles, Frederick Worth, August and September. 

 Aecidium Grossularke Schum. 



Not so common as in 1894 on Ribes Grossulariae, R. gra- 

 cile. 

 Uredo Caeorna-nitens Schw. 



(C. interstitiale, Schlecht and is supposed to be connected 

 with Puccinia Peckiana. ) Abundant on Rubus villosus ; 

 large patches of native blackberry destroyed; seriously 

 affecting cultivated blackberry locally. It was also 

 observed in Story, Polk, Louisa and Henry counties. 



