4 FUNGUS-FLOEA. 



Inocybe. — Stem fleshy not cartilaginous ; cuticle of pileus 

 fibrilloso or silky ; gills sinuato-adnexed. 



Bolbitius. — Pileus membranaceous; gills soon deliques- 

 cent. 



Pluteolus. — Gills free. 



§§ Stem furnished with a volva or ring. 



Pholiota. — Ring present ; volva absent. 



Acetabularia. — Volva present, ring absent. 



PAXILLUS. Fries. 



Pileus symmetrical, excentric, or conchiform ; margin invo- 

 lute, more or less fleshy ; stem central, excentric, lateral, or 

 absent, expanding at the apex without diiferentiation into 

 ■the flesh of the pileus ; gills decurren t, usually separated 

 from the flesh of the pileus by a thin differentiated horny or 

 cartilaginous layer, hence easily separated from the latter ; 

 spores dirty white or pale ferruginous. 



Paxillus, Fries, Gen. Hymen., p. 8 ; Cke., Hdbk., p. 285. 



The most pronounced characteristics of the present genus 

 are : the strongly involute pileus, the decurrent gills easily 

 removable froiu the flesh of the pileus, and the dingy or 

 ferruginous spores. 



ANALYSIS OF THE SPECIES. 



" I. Lepista. — Pileus entire, central ; spores dirty white 

 {rather ferruginous in P. panaeolus). 



II. Tapinia. — Pileus usually excentric or resupinate ; 

 spores ferruginous. 



