Saprophytic Fungi of Eastern Iowa. 183 



Height 4'-5'- Pileus 6'-S'. Spores, .005 mm. 



Habitat on elm trees, often high above the ground. Rare. 



Ours are not very good Pleuroti, if we insist on defining 

 Pleurotus as having the stipe lateral. Specimens of our present 

 species are often perfectly symmetrical. However, the Pleu- 

 roti are epixylous, i. e., developed on wood, as tree-trunks, 

 etc., and this peculiarity is frequently all one needs in order to 

 rhcike the proper generic reference. In the next species fol- 

 lowing, the stipe is wanting altogether. 



22^'. Agaricus applicatus, Batsch. 



Pileus sessile, pale ashen, sub-membranaceous, somew^hat 

 firm, cup - shaped, resupinate, villous at the base; lamella? 

 broad, not crowded, thin. 



Pileus a line or two wide. 



Not rare on the bark of trees, chiefly oaks, associated with 

 lichens, some of which the agaric much resembles. Only to 

 be recognized, or at least identified, by the aid of a good lens. 



Of the genus under consideration we may now proceed 

 to the third section, 



SERIES III. DERMINI.— The Rusty-Spored Agarics. 



The spores in this series are well described as ferruginous 

 (having the color of iron-rust). They are always of some 

 shade of yellowish or reddish brown. Because of the color 

 of the spores Saccardo includes here the genera Cortinarius 

 and Pa.xilhcs, and names the series Ochrosporce or DermincB.^ 

 But the former genus is so well defined by its remarkable 

 veil, as well as by the totit ensemble of its characters, that it 

 seems convenient to leave it apart, and Paxillus verges so 

 closely upon the Boleti and Polypores that it may well be dis- 



I As to the orthography here, the concord of Dcrmiiii was doubtless intend- 

 ed to be with Agarici, tawny Agarics, Agaricus being masculine; Derminoc is 

 better, the concord being with s^ora:, I. e., tawnv spores. The old form is here 

 retained because the term is employed in the original limited sense as hy 

 Fries. 



