36o BRITISH FUNGI 



B. rostkovii. — Cap 3-4 in. across, becoming almost plane, dingy 

 olive-brown or rufous, minutely velvety, often cracking ; flesh 

 white, tinged red when cut, with a faint tinge of blue ; tubes about 

 I in. long, yellow-green, pores angular ; stem obconic or tapering 

 strongly downwards, about i in. long. 



Known ])y the obconic stem, and the flesh becoming red. 



Under trees. 



B. purpurascens. — Cap 3-4 in. across, deep purple, tinged brown, 

 flesh marbled dingy grey ; tubes | in. or more long, dingy yellow, 

 pores small, irregularly circular ; stem about 2 in. long, tapering 

 downwards to a rooting base, purple-red. 



Differs from B. purpureus in the yellow pores. 



In woods. 



B. radicans. — Cap 3-4 in. across, velvety, greyish olive, becoming 

 yellowish red ; tubes about J in. long, pores angular, yellow ; stem 

 2-3 in. long, tapering downwards, rooting, yellow, stained with red. 



Differs from B. chrysentcron in incurved edge of cap and rooting 

 stem. 



On the ground under trees. 



B. cyanescens. — Cap 2-5 in. across, often wavy, tomentose, 

 tan-colour or brownish, flesh thick, white, deep blue when broken ; 

 tubes about J in. long, almost free from the stem, pores minute, 

 pale lemon-yellow ; stem 2-3 in. long, thickened below, coloured 

 like the cap. 



Sometimes straw-colour ; known by the intense blue colour 

 of the broken flesh. 



In woods. 



B. parasiticus. — Cap 1-2 in. across, almost plane, silky, yellowish 

 tan ; tubes about 2 lines long, pores yellow, then deep cinnamon ; 

 stem about 2 in. long, curved. 



Variable in colour. Known by its remarkable habitat. 



Parasitic on species of Scleroderma. 



B. duriiisculiis. — Cap 2-3 in. across, hemispherical, minutely 

 velvety, pale brown, chestnut or umber, often cracked ; flesh 

 whitish, changing to copper-colour when cut ; tubes almost free 

 from stem, |-| in. long, pores yellow ; stem 4-7 in. long, stout, 

 yellowish, rough with dark projections. 



Differs from B. scaher in yellow pores and flesh coppery when 

 broken. Esculent. 



In woods. 



B. priiinatus. — Cap 2-3 in, across, purplish bay or reddish cinna- 

 mon with a brown bloom ; white, then tinged blue or greenish ; 

 pores yellow, rounded, minute ; stem about 2 in. long, swollen 

 below. 



Solitary or clustered. Marked by dark bloom on the cap. 



Among grass under trees. 



