414 FUNGUS-FLORA. 



squaimilose pileus. The stem is not bulbous at the base, as 

 iu Aijaricus campestris, var. silvicola. 



Agaricus cretaceus. Fr. 



rileus 3-4 in. across, campanulate then expanded, and the 

 margin sometimes upturned, naked, even, nearly smooth, or 

 rivulose, sometimes cracked into areolae at the disc, whitish, 

 or with a pale buff disc, flesh thin, soft; gills free, broadest 

 in front and then nearly A in. broad, rather distant, for a 

 long time whitish, becoming blackish-brown with a tinge of 

 flesh-colour ; stem about 3 in. long, ^ in. thick, usually 

 .slightly thickened at the base, smooth, whitish, sometimes 

 slightly flexuous, distinctly hollow, ring almost median, 

 simple, reflexed with the margin again ascending ; spores 

 5-6 X 3-5 yix. 



Agaricus cretaceus. Fries, Sj'^st. Myc. i. p. 28 ; Cke., Hdbk., 

 p. 194 ; Cke., Illustr. pi. 524 (not of BuUiard). 



On rich pastures, &c. Distinguished by the whitish 

 pileus, distinctly hollow stem, and distant ring. 



Stem hollow, cavity stuffed with a cobweb-like substance; 

 firm, 3 in. long, 3-6 lines and more thick, attenuated 

 upwards, even, glabrous, white, not spotted ; ring superior, 

 ample, reflexed, the margin erect, even, white, Pileus 

 fleshy, lentiform-globose when young, then convexo-ex- 

 panded, obtuse, 3 in. and more broad, dry, sometimes even, 

 sometimes with the cuticle broken up into deciduous squa- 

 mules, especially near the rivulose margin, altogether white. 

 Flesh thick, white, unchangeable. Gills free, at length 

 remote, ventricose, narrowest near the stem, crowded, per- 

 sistently white for a long time, brownish when old. (Fries.) 



Agaricus pratensis. Schaeff. 

 Pileus 2-3 j, in. across, ovoid then expanded, becoming 

 smooth or sometimes broken up into squamules more or less 

 concentrically arranged, whitish, then greyish, flesh thick in 

 the centre, thin towards the margin, white ; gills free, 

 rounded behind, about \ in. broad, greyish, then brown ; 

 «tem about 2 in. long, ^-r- in. thick, base tliickened, smooth 

 whitish, ring median, simple, usually deciduous ; stem 

 becoming more or less hollow ; speres elliptical, ajiiculate, 

 G X 3 • 5 /A. 



