Agaricus. 205 



arvensis, Schaeff. P. 1024 cm. conico-campan. then exp. 

 smooth, even, white often stained yellow, flesh white, unchangeable ; 

 g. close to stem, narrow; s. 6 12 cm. hollow, whitish, floccosely 

 stuffed, ring pendulous, double, exterior radiately split ; sp. 6 x 4. 

 (911 x 6 Sacc.) Edible. 



var. purpurascens, Cke. Smaller than type. P. tinged purple. 



Differs from Ag. xanthodermus in the persistently white 

 flesh. 



xanthodermus, Genev. ( = Ag. flavescens, Roze.) P. 610 cm. 

 fleshy, convex, even, glabrous, greyish-white, cuticle becoming 

 yellowish when touched, and the white flesh changing to yellow 

 when broken; g. free, sinuate, pale rose then grey, finally purple- 

 brown; s. cylindrical, stuffed, ring thin, flesh deep yellow at base, 

 rest white ; sp. - . 



Differs from A. arvensis in flesh becoming yellow, and in yellow 

 base of stem. 



[ammophilus, Menier. P. convex, exp. thick, whitish ; g. free, 

 crowded, rosy ; s. stout, solid, base more or less thickened, whitish, 

 ring membranous, strongly adherent to apex of s. slightly striate, 

 with a circular canal; sp. 6 7'5 x 4 7. 



cretaceus, Fr. P. 6 9 cm. globose then convex, shining white, 

 at first smooth and silky, then tibrillosely squamulose ; g. for a long 

 time white, then blackish-brown; s. 68 cm. white, hollow, ring 

 large, superior, fixed ; sp. 9x6. Edible. 



pratensis, Schaeff. P. 4 7 cm. ovoid then exp. even or squamu- 

 lose, greyish-white; g. rounded behind, grey then brown; s. 4 6 cm. 

 stuffed, base thickened, naked, ring median, simple, deciduous; 

 sp. 6x3-5. 



var. fulveolus, Lasch. P. squamuloso-fibrillose, yellowish or 

 reddish ; s. hollow, yellowish ; g. tawny-denticulate. 



[Bernard!!, Q. Compact, white, tomentose under a lens. P. 

 10 20 cm. convex then exp. cracked into areolae, greyish-white ; 

 s. solid, stout, ovate, striate at the apex, ring membranous, striate 

 above ; g. free, greyish-pink then bay-brown ; flesh white, becoming 

 purplish then brownish when broken ; sp. subgl. 8. 



Foetid. Edible. 



campestris, L. 6 12 cm. convex then plane, floccosely silky 

 or fibrillose, whitish, flesh reddish-brown when cut ; g. close to stem, 

 subliquescent, fleshy then umber; s. stuffed, even, white, ring median, 

 torn ; sp. 7 8 x 5 6. Edible. 



var. alba, Berk. P. rather silky white ; s. short. 



var. praticola, Vitt. P. with rufous scales, flesh reddish. 



var. rufescens, Berk. P. rufous, minutely scaly ; s. elongated. 



var. umbrina, Vitt. P. even, umber ; s. stout, squamulose. 



var. fulvaster, Viv. P. even, ochraceous-tawny ; s. solid ; g. rosy 

 then blackish. 



var. villaticus, Brond. P. cortex breaking up into scales; s. 

 peronately scaly up to inf. ring. 



