21 



II., III. On Rhus Toxicodendron, Poison Ivy. Abundant and de- 

 structive. Burl., July, 1897; O. 1248. Snake Mt., July, 1898; O. 

 1809. 



Uromyces Trifolii (Hedw.) Wint. 



III. On Trifolium hybridum, Alsike Clover. Burl., Sept. 1890; 



C. 1250. Charlotte, Aug. 1897; O. 1251. 



III. On Trifolium pratense, Red Clover. Common and in- 

 jurious. Burl., Oct. 1890; J. 259. 



I., II. On Trifolium repens. White Clover. Burl., July, 1898; H. 

 1821. 



