CLASSIFICATION 135 



Separated from M. lycogala and M. galopoda by absence of milk 

 in the stem, and from M. atrocyanea by the absence of blue tints. 



On the ground among dead leaves, etc. 



M. leptocephala. — Smell strong, alkaline, entirely grey. Cap 

 sulcate, edge often wavy ; gills broad ; stem about 2 in. long. 



Smell like sweet nitre. Solitary. Differs from M. alcalina in 

 the stem not being sticky or viscid. 



On trunks and on the ground. 



M. ammoniaca. — Smell strong, nitrous. Cap umbonate, striate, 

 dark brown or greyish, |-| in. across ; gills whitish ; stem dry, 

 whitish, rooting. 



Differs from M. alcalina in dry stem. M. nietata differs in soft 

 substance and hygrophanous pileus, soon becoming pale. 



On the ground. 



M. metata. — Cap campanulate, slightly striate, grey, becoming 

 pale when dry ; gills whitish ; stem 2-3 in. long, soft and flaccid, 

 greyish white. Smell alkaline, weak, sometimes absent. 



Among moss in fir woods. 



M. peltata. — Cap soon flat, edge striate, blackish brown, grey 

 when dry, about f in. across ; gills grey ; stem slender, often wavy. 

 Inodorous. 



Among grass and moss. 



M. consimilis. — Gregarious. Cap bell-shaped, umbonale, edge 

 striate, soon upturned, grey, umbo darker, about i in. across ; 

 gills narrow, grey ; stem pale grey. Inodorous. 



Separated from allies by absence of smell. 



Among grass. 



M. cetites. — Campanulate, coarsely striate, with a prominent 

 umbo, dusky brown, about f in. across ; gills whitish, connected 

 by veins ; stem whitish, shining. 



Known among dark-coloured forms by the prominent umbo, 

 coarse striation, and gills connected by veins. No smell. 



Among damp moss and grass. 



M. stannea.- — Cap campanulate, then flattened, indistinctly 

 striate, grey, tin-colour, with a silky sheen when dry, |-i-J- in. 

 across ; gills greyish white ; stem 2|-3| in. long, shining, pallid, 

 often not quite straight. 



Among grass. 



M. vitrca. — Campanulate, very brittle, finely striate up to the 

 small umlio, livid brown ; gills adnate, narrow, whitish, not con- 

 nected by veins ; stem 3-4 in. long, finely striate, shining, colour 

 of cap or paler. 



Very fragile. Distinguished among allies by the narrow, adnate 

 gills not connected by veins. 



On the ground in damp pine woods. 



