230 IOWA ACADEMY OF SCIENCES. 



Specimens from Iowa. — Ex. Herb. J. C. Arthur (1(>87); 

 J)ecorah, E. W. D. Holway. 



UafUac/o nuda (Jens) K. k S. 

 Host. — llordeuni vulyare. 

 Specimens from Iowa. — Herb. Iowa State College (22) 

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



E. W. D. Holwaj'. 



Cr3qDt. Dist. Iowa State College (1) Ames, C W. Carver. 

 Ustilago o.validis Ell. and Tracy. Jour. Myc. 6:77. 1890. 

 Exsiccati.— Ell. & Ev. N. A. F. 2424. 



Spore masses in the ovaries, light brown; spores globose 

 or subglobose, yellowish or golden brown; 10-1 6u: epispore 

 thickly and sharply echinnlate. 



Host. — Oxalis strida. 



Specimens from Iowa. — Herb. Iowa State College (128) 

 Ames, G. W. Carver. 



This species has been searched for diligently by many 

 collectors from the I. S. C. Botanical Department, but not 

 until July 3, 1900, was it collected by Mr. G. W. Carver. 



Ustllago Panlci-ylaari (Wallr. ). Niessl. 

 Host. —Sefaria glauca. 

 Specimens from Iowa. — Herb. Iowa State College (86) (37) 

 (38) (39) Ames, L H. Pammel; (40) Ames, C. B. Weaver;, 

 (35) Sioux City, L. H. Pauimel; (47) Ames, L. H. Pammel; 

 Ex. Herb. J. C. Arthur, (1722) Decorah, E. W. D. Holway; 

 Charles City, J. C. Arthur; Herb. C. II. Ball, Ames, C. R. 

 Ball; Herb. Hume (63) Boone, L. H. Pammel. Crypt. 

 Dist. Iowa State College (2) Ames, G. W. Carver. 



This Ustilago is very common in the state, usually 

 appearing on the host in August and September, though 

 the author has collected it as early as July 9th. 

 JJsfilago perenudns Rostr. 

 Host. — ArrJii'iKdlwrKin (ivendceHm. 

 Specimens from Iowa. Sey. & Ear. Ec. F. (83). Ames, 



F. A. Sirrine, and L. H. Pammel; Herb. Iowa Stat3 College 

 (65) Ames, L. H. Pammel; (68) Ames, E. R. Hodson; (69) 

 Ames, J. C. Arthur; (70) Ames, L . H. Pammel; (71,72) 



