CLASSIFICATION 337 



P. crenata.— Cap ^— i in. across, hemispherical, obtuse, edge 

 crenate, grooved half-way up, whitish with a tinge of yellow ; gills 

 adnate, becoming blackish; stem ih-2 in. long, striate and mealy 

 above, whitish. 



Known by coarsley groo\ed cap with a crenate edge. 



On the ground. 



P. disseminata. — Cap about I in. across, thin, ovate-campanulate, 

 coarsely striate, scurfy, then naked, edge entire, tinged yehow, 

 then grey ; gills narrow, becoming blackish ; stem i-ij in. long, 

 rather curved, mealy, then smooth. 



Densely crowded, often forming crowded patches a foot or more 

 across. 



About trunks of trees and on the ground. 



PSATHYRA 



Cap thin, conical or campanulate, then expanded, edge at first 

 straight and adpressed to the stem ; gills purplish or brownish, 

 as are also the spores ; stem central, polished, hollow. 



Nearest to Psathyrella, differing in the brown or purplish gills 

 and brown spores. 



* Cap conico-campanidate, gills ascending, stem straight, veil 

 absent. 



P. elata (PL XXVI, fig. 7). — Cap up to i| in. across, thin, obtusely 

 campanulate, dark brown when moist, pale ochre when dry, and 

 then minutely atomate ; gills crowded ; stem 4-7 in. long, straight, 

 white, shining. 



Among grass on hedge banks, etc. 



P. conopilea. — Cap about i in. across, conico-campanulate, bay- 

 brown when moist, becoming pale ochraceous when dry ; gills 

 purple-brown ; stem 4-6 in. long, whitish, silvery, shining, some- 

 times wavy. 



Close to P. data, differing in the more conical cap, and gills only 

 slightly attached to the stem. 



In grassy places, gardens, etc. 



P. glareosa. — Cap campanulate, umbonate or obtuse, striate, very 

 minutely tomentose, grey, apex pale chestnut ; gills adnate, broad 

 behind, umber ; stem 1-2 in. long, slender, fistulose, brown with 

 white fibrils. 



Flesh brown, especially close to the gills. 



On gravelly soil, after much rain. 



P. mastiger. — Cap up to i| in. across, at first nearly cylindrical, 

 then conico-campanulate and umbonate, usually wavy, dark brown, 

 dingy ochre when dry ; gills umber, edge pale ; stem about 3 in. 

 high, white. 



Known by the prominent uml)o. 



Among grass on roadsides, etc. 

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