OMPHALIA. 383 



Agaricus cMoneus, Persoon, Myc. Eur., iii. t. 26, f. lO-ll ; 

 Cke., Hdbk., p. Ill ; Cke., lUustr., pi. 212d. 



On wood, dung, leaves, &o. 



Somewhat resembling P. sepficus, biit smaller, with a less 

 distinct stem, the flesh of the pileus much thinner. Known 

 from P. hypnopliilus by the distinctly villose or downy pileus. 



Pileus 2 lines broad, extremely delicate and fragile, 

 clothed with white down, fixed by a few downy threads, the 

 margin involute. Gills radiating, distant, with sometimes a 

 single smaller one in the interstices. (Berk.) 



OMPHALIA. Fries, (figs. 10, 11, p. 301.) 



Pileus symmetrical, usually very thin, depressed or infnn- 

 dibuliform; gills truly decurrent; stem distinctly cartila- 

 ginous externally, tubular, but the cavity frequently stuffed, 

 especially when young, usually expanding upwards into the 

 flesh of the pileus ; spores more or less elliptical, smooth. 



OmpJialia, Fries, Syst. Myc, i. p. 162; Cke., Hdbk., p. 91.. 



Agreeing with CUtocyhe in the decurrent gills, but readily 

 known by the externally polished, cartilaginous stem, and 

 the very thin substance of the pileus. Separated from 

 Mycena and Collyhia by the truly decurrent gills. 



The species are with few exceptions small, and many grow 

 on wood, twigs, &c.'; none are edible. Smell obsolete, or 

 nearly so, in all the species. 



ANALYSIS OF THE SPECIES. 



I. COLLYBIAEII. 



Pileus dilated from the first, margin incurved. 



* Sydrogrammi. Usually large, gills narrow, very much 

 crowded. 



(In addition to the stem character, the species of this 

 group differ from the Cyathiformes section of CUtocyhe, in the 

 gills being truly decurrent from the first, very much crowded, 

 and arcuate.) 



