TRICHOLOMA. 219 



almost glabrous, whitish, striate with smoky fibrils, stuffed, 

 base thickened ; spores elliptic-oblong, 10 x 45 //,. 



Agaricus melaleucus, Persoon, Syn., p. 355; Cke., Hdbk., 

 p. 42 ; Cke., Illustr., pi. 119. 



On the ground in woods, &c. 



Distinguished by the sooty black pileus, thin flesh, and 

 white gills. The smaller forms resemble T. oreinum in 

 general appearance, the latter is however readily separated 

 by the whitish squamules at the apex of the stem. 



Stem stuffed, then hollow, ri<iid and fragile, elastic when 

 young, 2-3 in. long, 2-3 lines thick (sometimes more), base 

 somewhat incrassated ; naked (not pulverulent), but fibril- 

 losely striate, whitish, striae darker. I 'ileus fleshy, soft, 

 convex then expanded, obsoletely umbonate, 1^-3 in. broad, 

 even, glabrous, usually sooty -blackish when moist, then 

 livid brown, becoming pale when dry ; gills emarginate, 

 adnexed, crowded, horizontal, straight (not arcuately falcate 

 as in A. arcuatus), broad, more or less ventricose, quite entire, 

 white. Flesh soft, white, not hygropha' ous, not yellowish 

 as in A. arcuatus. There are several remarkable varieties : 

 (1) adstringens, Pers., pileus rigid, gills becoming tinged 

 flesh-colour ; (2) polioleuca, stem short, firm, apex pruinose, 

 pileus livid grey, gills dingy white ; (3) porphyroleuca, firm, 

 pileus rufescent, stem solid, fibrillose. (Fries.) 



Var. polioleucus, Fr. ; Cke. Illnstr., pi. 957. 



About the size of the typical form; pileus obtusely 

 nmbonate, livid grey ; stem almost equal, apex pruinose 

 with white meal; gills whitish; spores elliptical, 10 x 5 //. 



Var. porphyroleucus, Fr., Cke., Illustr., pi. 119s. 



Not half the size of the typical form; firm; pileus 

 fleshy, uinbo darker and evanescent, stem solid, fibrillose; 

 gills white. 



Tricholoma grammopodium. Bull. 

 Pileus 3-6 in. across, disc thickish, margin thin, flesh- 

 coloured when moist, white when dry, soft, fragile ; cam- 

 panulate then convex, obtusely umhonate, even, glabrous, 

 pellicle moist in rainy weather but not viscid, brownish or 

 livid when moist, whitish when dry; sometimes entirely 

 white ; gills adnate with a sinus, or emarginate, narrowed 



