CI>ASSIFICATION 119 



R. nigricans. — Cap 3-6 in. across, fleshy, whitish, then sooty ohve, 

 finally black ; flesh firm, white, reddish when broken ; gills thick, 

 broad, distant, brittle, pallid, reddish when bruised ; stem il-2h in. 

 long, stout, white, then ])lackish, solid. 



Becomes entirely black with age. Differs from R. adiida by the 

 flesh becoming reddish when cut and by the much thicker and more 

 distant gills. R. densifolia also becomes reddish when cut, but 

 differs in the thin, somewhat crowded gihs. 



R. aditsta. — Cap 3-4 in. across, white, then brownish, or with a 

 scorched appearance ; gills thin, crowded, pallid ; stem up to 2 in. 

 long, pallid, then sooty. 



In woods. 



R. chloroides. — Cap 4-6 in. across, soon depressed, shining, white ; 

 gills slightly decurrent, white with a slight tinge of green ; stem up 

 to i-|- in. long, stout, white, often with a tinge of green close to the 

 gills. 



Distinguished by the green shade of the gills. Differs from the 

 white species of Lactarins in the absence of milk. 



R. densifolia. — Cap 3-4 in. across, whitish, then brown or greyish ; 

 flesh white, red when broken ; gills white or with a pink tinge ; stem 

 up to 2 in. long, stout, pale. 



Differs from R. adiista in the flesh becoming red when broken. 



In woods, etc. 



If Cap clear yellow. 



R. citrina. — Cap 2-3 in. across, bright lemon-yellow, occasionally 

 with a tinge of green ; gills white ; stem 2-3 in. long, white. 



In woods. 



R. fingibilis. — Cap about 2 in. across, viscid, clear yellow ; gills 

 white ; stem up to i| in. long, white. 



Differs from R. citrina in the viscid cap. 



f f f Cap green or olive. 



R. olivascens. — Cap 2-3 in. across, olive, the disc becoming 

 yellowish, edge even ; gills white, then yellowish ; stem 1-2 in. 

 long, white. 



Woods and among bushes, etc. 



R. heterophylla. — Cap 2-3 in. across, pohshed, colour varied, 

 greenish with ochraceous disc, yellowish brown, etc. ; gills very 

 narrow, closely crowded, white ; stem about i.l in. long, stout, 

 white. 



R. azurea (PI. IX, fig. 6). — Cap about 2 in. across, glaucous green, 

 ohve-green, or with a tinge of purple, everywhere covered at first 

 with a dense white bloom ; gills pale cream-colour ; stem about 

 i^ in. long, white. 



Among grass under trees. 



R. virescens. — Cap 3-5 in. across, dingy opaque green ; flocculose 



