IOWA ACADEMY OF SCIENCES. 229 



Ustilayo Bistortarum (DC) Koern. 

 This species was listed b}^ J. C. Arthur in his memoran- 

 dum of Iowa Ustila^inese, Bull. Iowa Agrl. Col., Dept. Bot. 

 172. 1884. No specimens could, however, be found and it 

 entered here on the authority of Dr. Arthur. 

 Host. — Polygonum incdDiatum. 

 Locality. — Ames. 



Ustilayo hrouiivora (Tul.) Fisch, de Waldh. 

 Host. — BroiHKs niaryinatiis. 

 Specimens from Iowa. — Herb. Iowa State College (11) 

 (12) Ames, F. A. Sirrine. 



The spores from the Iowa specimens are darker in color 

 than those of N. A. F. 3052, and average smaller in size 

 and are more regular in shape than those of Ec. F. 584. 

 The markings of the epispore are the same in all cases. 

 Ustilayo car ids (Pers. ) Fuck. Symb. Myc. 39. 

 Listed by Arthur, Memorandum Iowa Ustilagineae, Bui. 

 Iowa Agrl. Col., Bot. Dept. 1884: 172. 

 Ustilayo Crameri Koern. 

 Host. — Setaria Italica. 

 Specimens from Iowa. — Herb. C. II. Ball, Ames; L. H. 

 Fammel and C. R. Ball. 



The glumes are apparenly little affected. 

 Ustilayo hordei (Pers.) K. & S. 

 Host. — Hordeum ndyare. 

 Specimens from Iowa. — Herb. Iowa State College (23) 

 Ames, G. W. Carver; Ex. Herb. J. C. Arthur (1676b) Ames, 

 J. C. Arthur. Crypt. Dist., Iowa State College (,7) Ames, 

 G. W. Carver. 



No specimens are at present found in the herbarium of 

 the Iowa State College. The only material of the species 

 from the state thus far was collected on the experimental 

 plots on the college farm, June 11, 1900, by Mr. E. L. R. 

 Walker and myself. In three plots it was quite common. 

 Ustilayo hypodytes (Schlecht) Fr. 

 Host. — Stipa spartea, Trin. 

 Ustilayo lonyissima (Sow) Tul. 

 Host. — Glyceria sp. 



