OMPHALIA. 385 



indistinctly zoned ; gills slightly decurrent, tliin, crowded, 

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

 dark grey, soon hollow. 



Agaricus {OmpJialia) detriisus, Fries, Monogr., ii. p. 291. 



Agaricus (Omphalia) umhilicatus, Cke., Hdbk., j). 92. 



In woods among moss, &c. 



With the habit of some species of Clitocyhe, but readily 

 distinguished by the cartilaginous stem. Stem stuffed when 

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

 attenuated upwards, even, glabrous, dark 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 umbilicaius, Sch.3ieffe,r,t. 207, approaches the present 

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

 moist, and whitish when drj^, apex of stem silk}-, and pileus 

 umbilicate from the first. (Fries.) 



Omphalia maura. Fr. 



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

 umbilicate, glabrous, hj^grophanous, 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, w-ith 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 fx. 



Agaricus (^Om2)JiaUa.) 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 Collyhia atrata, but distinguished 

 by the decurrent, narrow, crowded gills. 



Omphalia ofFuciata. Fr. 



Pileus 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 



