CLASSIFICATION 255 



P. terrigena. — Cap ii-3 in. across, silky-librillose, pale dingy 

 yellow ; gills rusty with an olive tinge ; stem about 2 in. long, 

 ding)'- yellow, with rusty, wart-like sqiTamules, ring small as a rule, 

 part remaining attached to the edge of the cap. 

 Damp ground in woods. 



P. erebia (PI. XXI, fig. 4). — Cap 1-2 in. across, rather viscid, 

 smooth, umber with an olive tinge, pale when dry ; gills dingy 

 cinnamon ; stem about 2 in. long, striate, soon pale, ring drooping. 

 Fragile, cap often wrinkled, umbonate or depressed. 

 Grassy places in woods. 



P. omhrophila . — Cap 2-3 in. across, rusty, then pale tan ; gills 

 crowded, becoming rusty ; stem 3-4 in. long, pallid, ring white. 

 In grassy places after much rain. 



P. tognlaris. — Cap §-i| in. across, pale ochraceous ; gills crowded ; 

 pale rusty ; stem 3-4 in. long, often wavy ; pale ochre, ring entire, 

 spreading. 



Among grass, in gardens, etc. 



P. hlattaria. — Cap |-§ in. across, rather umbonate, rusty, edge 

 striate ; gills crowded, water}^ cinnamon ; stem i-i| in. long, 

 white, ring white. 



Known from P. tognlaris by the straight white stem. 



In gardens, etc. 



P. prcBCOx. — Cap ih-3 in. across, soon plane, whitish, then tan- 

 colour ; gills crowded, white, then brownish ; stem 2-4 in, long, 

 mealy, then smooth, whitish, ring entire, white. 



Among grass, in gardens, etc., in spring. 



P. splialeromorplia. — Cap i|-2 in. across, soon plane, yellow ; 

 gills arcuato-decurrent, dry, becoming brownish ; stem 3-4 in. 

 long, silky, yellowish, ring large, entire. 



Among leaf-soil, etc. 



P. molliscoria. — Cap 2-3 in. across, soon plane, tawny yellow, 

 dry and shining ; gills crowded, rusty ; stem about 3 in. long, 

 straight, silky, pale yellow, ring broad, yellow, then rusty from 

 the spores. 



Differs from P. prcBcox in yellow cap and bright rust}' giUs. 



On the ground. Gregarious. 



P. radicosa (PI. XXI, fig. 3). — Cap 2-4 in. across, pale greyish tan, 

 spotted ; gills free, becoming reddish brown ; stem 4-6 in. long, 

 and running down into a long tapering root, colour of cap or paler, 

 concentrically sciuamulose up to the ring, smooth above. 



Known by the strong smell, free gills, and tapering rooting stem. 



On the ground round stumps. 



P. cookci. — Cap 1-2 in. across, convex, viscid when moist, pale 

 yellow with darker scales ; gills becoming brown ; stem about 

 2 in. long, reddish brown below, whitish upwards, fibrillose up to the 

 imperfect ring. 



