PSATHYRELLA. 345 



then black ; stem about 2 in. long, 1 line or more thick, 

 rather wavy, hollow, white, apex mealy ; spores elliptical, 

 10 X 4 p.. 



Agariais (Psathyrella) atomatus, Fries, Syst. Myc. i. p. 298 ; 

 Cke., Hdbk., p. 223 ; Cke., Illustr., pi. 638. 



On the ground under hedges, bushes, &c. 



Pileus resembling that of Psathyrella gracilis, livid and 

 becoming tinted with rose-colour or whitish, but more 

 fragile than the last-named fungus; stem not straight, 

 shorter (2 inches), rootless, not glabrous. Gills ventricose, 

 rather distant, edge coloured like the rest or whitish. 

 (Fries.) 



Stem hollow, 2 inches long, about 1 line thick, equal, not 

 rooting, oven, slightly wavy (not straight), white, apex 

 powdered with white meal. Pileus membranaceous, obtuse, 

 i-1 in. broad, lightly striatulate, becoming livid, striae 

 absent when dry, rugulose, powdered with shining atoms, 

 clay-colour or pallid-pinkish, sometimes reddish. Gills 

 adnate, broad, ventricose, rather distant, whitish, but from 

 the black spores greyish-black. (Fries.) 



Psathyrella crenata. Lasch. 



Pileus ^1 in. across, membranaceous, hemispherical, 

 obtuse, margin crenate, sulcate half way up, hygrophanous, 

 whitish with a tinge of yellow, disc darker, and atomate 

 when dry; gills adnate, rather ventricose, rather broad, 

 yellow-brown, then blackish ; stem 1^-2 in. long, 1-2 lines 

 thick, slightly curved near the base, fragile, whitish, striate 

 and mealy above, hollow; spores elliptical, 11-13 x 5-6 /x. 



Agaricus (Psathyrella) crenatus, Lasch, in Fries, Hym. Eur., 

 p. 315 ; Cke., Hdbk., p. 223 ; Cke., Illustr., pi. 847. Amongst 

 grass. 



Fragile. Stem 1^ in. long. Pileus f-1 in. broad, ochraceous 

 or rufescent, becoming pale. (Fries.) 



Distinguished by the coarsely sulcate pileus and crenate 

 margin. 



Psathyrella disseminata. Pers. (fig. 4, p. 303.) 

 Densely tufted. Pileus about in. across, membranaceous, 

 ovate-campanulate, at first scurfy then naked, coarsely 

 striate, margin entire, yellowish then grey ; gills adnate, 



