aoo BRITISH FUNGI 



narrowed behind. Known from 0. rustica in the absence of a grey 

 tinge on the cap and stem. 



On walls, sandy banks, etc. 



0. mnhellifera. — Cap rather fleshy, convex, then almost plane, 

 often more or less wavy or the edge upturned, striate when moist, 

 often minutely umbilicate, colour variable, most frequently whitish, 

 but grey, yellow, brownish or green, even and somewhat silky when 

 dry, about § in. across ; gills clecurrent, very distant, broad behind, 

 coloured like the cap ; stem coloured like the cap, base downy, 

 about \ in. long. 



Known from allied species by the thicker, almost flat cap, and the 

 broad, almost triangular, very distant gills. 



In swamps, exposed pastures, etc. On the ground. 



var. ahiegnus. — Entire plant pale yellow. 



Gregarious, on decayed fir stumps. 



var. viridis. — Every part pale green. 



On dead wood. 



var. myochrous. — Cap rather fleshy, smooth, brownish umber ; 

 stem hairy and rooting at the base ; gills somewhat branched. 



On sodden beech trunks. 



0. infumata. — Cap obtuse, not membranaceous, greenish, then 

 smoky ; gills few, broad, decurrent, distant, yellow ; stem thin, 

 yellow. 



Cap 2 lines across ; stem i in. long, slender, dilated at the base, 

 downy below ; gills about twelve, with smaller intermediate 

 ones. Allied to 0. umhellijcra, but quite distinct from all its 

 varieties. 



0. buccinalis. — Wholly white. Cap about | in. across, trumpet- 

 shaped, soon plane or depressed ; gills deeply decurrent, triangular, 

 distant, white ; stem quite short. 



On twigs, etc. 



0. retosta. — Cap thin, plane, then depressed, even, umber, margin 

 arched, polished and smooth when dry, -J-| in. across ; flesh pale 

 umber ; gills slightly decurrent, equally narrowed at each end, 

 distant, pale umber ; stem slender, equal, smooth, tough, hollow, 

 paler than the cap, up to I in. long. 



Somewhat resembling the' umber form of 0. umhellifeya, but 

 firmer, and the gills differ in being narrowed at each end. Like 

 0. umbratilis in colour and form, but reachly known by the distant 

 gills. 



0. ahhorrens. — Very foetid. Cap umbilicate, smooth, brown, 

 becoming pale ; gills narrow, decurrent, pale ; stem slender, slightly 

 thickened at the apex, coloured like the cap, about i in. long. 



Closely allied to 0. retosta, differing in its disgusting smell. 

 Stem sometimes pruinose when young. 



Among short grass on lawns, etc. 



