IOWA ACADEMY OF SCIENCES. 231 



Ames, (i. W. Carver. Crypt. Dist. Iowa State Callege (19), 

 Ames, G. W. Carver. 



Udilayo pnsfulata Tracy and Earle. 

 Host. — Fanicum proliferum. 

 Specimens from Iowa. — Herb. Iowa State College (53) 

 Ames, L. H. Pammel and Jared G. Smith. Herb. C. R. 

 Ball, Ames, L. H. Pammel. The Ames specimens show 

 only the ovaries of the host affected. They are distended 

 and roundish, the enveloping membrane being grayish in 

 color. 



Ustiluyo Tiahe}i.h<)rstiana Kuhn. 



Host — Pauicmn (/Idbnini and Fduiciim sarifjuinalc. 



Ustilayo spennopliora B. & C. 



Host. — Erofjrosiis major. 



Specimens from Iowa. — Herb. Iowa State College (73) 

 Ames, L. H. Pammel; Ex. Herb. J. C. Arthur (1693); 

 Decorah, E. W. D. Hoi way; Charles City, J. C. Arthur. 



This species is doubtless common in the state, but it is 

 generally overlooked as it produces no conspicuous distor- 

 tion or discoloration of the affected parts of the host. 

 Usfila(/o syntherismce (Schw.) Fiscli. de Waldh. 

 Hosts. — Faniruin capi/lare, F. iiro/ifmn)!, and Ceuchrus 

 trihuloides 



Specimens from Iowa. — Herb. Iowa State College (13) 

 Wilton Junction, L. H. Pammel; (17) (IS) Ames, C. E. 

 Bessey; (76) Ames, E. C. Stewart; (77) Ames, P. H. Rolfs; 

 (78) Ames, L, H. Pammel; (79) Ames, P. H. Rolfs; (SO) 

 E. C. Stewart; (87) Ames, L. H. Pammel; (88) Ames, 

 P. H. Rolfs; Herb. C. R. Ball, Ames, C. R. Ball, Crypt. 

 Dist. Iowa State College (14), Ames, H. H. Hume. Herb. 

 Hume (65) Des Moines, L. H. Pammel; (66) Boone, L. H. 

 Pammel. 



The forms of FanicniH ccipillare and panicu))! proliU'i-uiii 

 are identical, while between these two and the one on 

 CeiicJn-Hs trihnloides there is no appreciable morphological 

 distinction. The diiferent hosts are often found asso- 

 ciated, and when in proximity the one is aft'ected if the 



