UROMYCES. l8l 



U. terebinthi. D. C. 



Uredospores and teleutospores on Rhus toxicodendron 

 (ivy poison). The leaves are covered with the parasite. This 

 parasite is no doubt a blessing to those who are subject to ivy 

 poisoning, since this parasite sucks the life out of the weed and 

 thus kills it. 



XJ. Hedysari-paniculati. Schw. 



Uredospores more abundant than the teleutospores. You 

 find them together on one spot, or aggregate spots. 

 Common on Desmodium paniculata. 



U. caladii. Schw. 



-^cidium, uredo, and finally teleutospores on one leaf. 



Very common. After the middle of May it is very seldom that you 

 can find an Ariscema triphyllum (Indian turnip) that is clear from either 

 one of them. First comes the gecidium, then uredo, and one has barely 

 disappeared before the other follows. Common on Indian turnip. 



U. trifolii. A. and S. 



^cidium, uredo and teleutospores on our common clover. 

 The second crop of clover is the best to get specimens. The 

 Uromyces Lespedezae, Schw., is the same as the trifolii. 



Common on Lespedeza capitata. 



