SAPROPHYTIC FUNGI OF EASTERN IOWA. 



25 



This is the type of a new genus proposed by Mr. Ellis, 

 'Jotirnal of Mycology, Vol. V, p. 28, JMiicronoponis. a genus 

 founded to contain those species of Polyporus in which the 

 tubules are lined with projecting spinules. This genus is no 

 doubt as well founded as is Ilymoiochcete, which is in a sim- 

 ilar way separate from Stcreuni; but as the intent is hereto 

 distinguish forms if possible by external characters, it was 

 thought best to leave species of Miicroiioponis in their usual 

 place with this recognition, especially as we have but one or 

 two such species. N. A. F. 310. 



10. Polyporus rutilans [Per soon) Fries. 



Pileus fleshy-tough, thin, at tirst villous then glabrate 

 azonate, from fulvous-cinnamon fading, within concolorous; 

 pores short, small, thin, equal, cinnamon. 



Not common; on oak limbs occasionally a solitary specimen, 

 pale cinnamon throughout, at first slightly pubescent then 

 pulverulent. The pores are remarkably even and regular, 

 angulate, the whole hymenium with a Trametes look; the 

 margin blunt; about 3x5 cm in extent. 



11. Polyporus dryophilus Berkeley. 



Pileus thick, rigid, ungulate-scabrous, corky within, ferru- 

 ginous-3'ellow ; the context cinnamon; pores small, angular, 

 brownish-fuscous, the mouth at first whitish, pruinose. 



A large and rather handsome species, not common, on 

 species of oak. Easil}' recognized by its rich brown color 

 long tubules with whitish mouths. Specimens are 6-8 cm 

 long and 10-15 wide, 3-5 thick, often imbricated. 



12. Polyporus ciiioneus Fries. 



Pileus white, fleshy, soft, smooth, glabrate, azonate, fre- 

 quently extended behind; the margin incurved; pores short, 

 slender, round, equal, very entire. 



Collected on willow, rare. The pilei are dimidiate, decur- 

 rent behind with the pores. The texture when dry is soft^ 

 fragile, the color dull whitish. When wet the whole fungus, 

 becomes hyaline. In diameter about 2 cm. 



