IOWA ACADEMY OF SCIENCES. 235 



Tilletea rotundata (Arth.) Massee. 

 Host. — Panicum virgatum L. 



Specimens from Iowa. — Herb. Iowa State College, New 

 Albin, L. H. Pammel. Herb. J. C. Arthur (type). Herb. 

 Hume— (84) New Albin, L. H. Pammel. 



Affected ovaries scarcely differ from unaffected, there is 

 no swelling or other external mark which would indicate 

 that they are affected. 



Tilletia strkeformis (West.) Fisch. de Waldh. 

 Host. — Poa pratensis L. ; Phlem pratense L. ; Agrostis 

 alba. 



Specimens from Iowa. — Herb. Iowa State College (120) 

 (101) (102), Ames, L. H. Pammel; (121) (122), Ames, F. 

 C. Stewart. Herb. Hume (50) Ames, G. W. Carver. 

 Crypt. Dist. Iowa State College (3) (4) (5) Ames, G. W. 

 Carver. 



Tilletia suhfiisca N. Sp. 



Host. — Sporoholus neglectus Nash. 



Specimen from Iowa. — Type in the Ex. Herb. J. C. 

 Arthur, collected at Spirit Lake by Dr. J. C. Arthur. 



This species is altogether different from the two 

 species described by Ellis (1) on Sporobolus, namely T. 

 asperifoUa and T. montana. Specimen No. 1895 Ell. & Ev. 

 N. A. F. collected at Boise City, Mont, by Gustave Smith, 

 was made by Massee, the type of a new species, Tilletia 

 mixta. My species somewhat resembles Massee's, but 

 differs from it in having smaller and lighter colored spores. 

 Most of those examined and measured in Dr. Arthur's 

 specimens were 14u and none were above 16u. The spores 

 nearly always appear to be smooth and on a few only were 

 small scattered spines found. 



On these differences it has been provisionally described 

 as a new species.' 



Neovossia Korn, Oestr. liot. Zeitschr. 29:217. 1879. 



(1) Journal of Mycology 3 :55. Aii. 1887. 



