OMPHALIA. 385 



indistinctly zoned ; gills slightly decurrent, thin, crowded, 

 whitish; stem about H in. long, 2 lines thick, firm, glabrous, 

 dark grey, soon hollow. 



Agaricus (Omphalia) detrusus, Fries, Monogr., ii. p. 291. 



Agaricus (Omphalia) umbilicatus, Cke., Hdbk., p. 92. 



In woods among moss, &c. 



With the habit of some species of Clitocybe, but readily 

 distinguished by the cartilaginous stem. Stem stuffed when 

 young, then hollow, rather firm, 1-1 i in. long, 2 lines thick, 

 attenuated upwards, even, glabrous, dai-k grey, almost 

 blackish, base whitish. Pileus slightly fleshy, convex at 

 first, then umbilicate, 1-2 in. broad, even, glabrous (slightly 

 zoned according to the figure), dark grey. Flesh white, 

 gills somewhat horizontal, slightly decurrent with a tooth, 

 about 1 line broad, thin very crowded, whitish. 



Agaricus umbilical us, Schaeffer, t. 20 7, approaches the present 

 species, but differs in the livid colour of the pileus when 

 moist, and whitish when dry, apex of stem silky, and pileus 

 umbilicate from the first. (Fries.) 



Omphalia maura. Fr. 



Pileus 1-1 1 in. across, submembranaceous, convex, deeply 

 umbilicate, glabrous, hygrophanous, striate when moist, 

 sooty brown ; even, shining with a silky gloss, and livid 

 when dry , the umbilicus is very deep, but the remainder 

 of the pileus arched, with the margin drooping ; gills very 

 deeply decurrent, narrowed at both ends, arcuate, very closely 

 crowded, shining white ; stem 1-2 in. long, scarcely 1 line 

 thick, distinctly cartilaginous, almost horny, rigid, fragile, 

 stuffed at first, sooty black ; spores broadly elliptical, 

 5-6 x 3-4 /*. 



Agaricus (Omphalia) maurus, Fries, Syst. Myc., i. p. 168 ; 

 Cke., Hdbk., p. 92 ; Cke., Illustr., pi. 287A. 



Swampy places, especially where the ground has been 

 burnt ; also among grass on lawns. 



Superficially resembling Collybia atrata, but distinguished 

 by the decurrent, narrow, crowded gills. 



Omphalia offuciata. Fr. 



Fileus about 1 in. across, flesh thin, convex then piano- 

 depressed, but not deeply umbilicate, even, glabrous, hygro- 

 phanous ; like the gills at first dark then pale flesh-colour, 



VOL. II. 2 C 



