238 IOWA ACADEMY OF SCIENCES. 



Ambrosia artemisicpfolia, L. is very common in the region 

 of Ames and though Ambrosia trifida and Ambrosia a rte- 

 misiwfolia are equally common, I have never collected the 

 Entijloma on the former host though I have frequently col- 

 lected Eni. compositarum on plants of Ambrosia arfemisice- 

 folia growing side by side with Ambrosia trifida. 



Entyloma saniculce, Pk. 



Host. — Sanicula Canadensis, Torr. 

 Specimens from Iowa. — Ex. Herb. J. C. Arthur (1823) 

 Decorah, E. W. D. Holway. 



Entyloma leuto-maculans, N. Sp. 



Host. — Mertensia Virginica, DC. 

 Specimens from Iowa. — Type specimen in Ex. Herb. J^ 

 C. Arthur, collected at Decorah, Iowa, by E. W. D. Hol- 

 way, May 31, 1885. 



I have compared this with the two European species 

 occurring on Boraginaceae and it appears to be different. 

 The character of the spots is quite unlike either, being 

 lighter in color and surrounded (in a dried specimen) by a 

 slightly elevated ring. The spores are thick walled and 

 average larger in size, than either Entyloma canescens, 

 Schroet., or Entyloma serotinum, Schroet. (Specimen 213 

 Kunze Fungi selecte, on Myosotodis intermedia, and 354 

 Krtiger's Fungi Saxonici on Symphytum tuberosum exam- 

 ined.) 



Entyloma Pammelii, N. Sp. 



Host. — Zizania aquatica. 

 Specimens from Iowa. — Type specimen in Ex. Herb. J, 

 C. Arthur (1806) collected at Decorah, Iowa, Oct. 11, 1885, 

 by E. W. D. Holway. 



This differs from Entyloma crastophilum, Sacc. and from 

 Entyloma irregulare, Johans, in the color and size of the 

 spots and the lighter color and more angular shape of the 

 spores. Entyloma crastophilum, Sacc. on Holcus mollis, L. 

 No. 1301. Kriiger's Fungi Saxonici and Entyloma irregu- 

 lare, Johans on Poa annua. No. 1402. Kriiger's Fungi 

 Saxonici 1301 was used for comparison. To this species is 

 also referred the specimens collected by Dr. Pammel at 



