CLASSIFICATION 359 



B. siilphureus. — Cap 3-6 in. across, rather thin, downy, sulphur- 

 yellow, flesh tinged blue when broken ; tubes yellow, then tinged 

 green ; stem short, stout, yellow. 



Growing in clusters from a dense golden yellow down. Caps 

 wavy and growing into each other. 



Among sawdust, chips, etc. 



B. variicolor. — Cap about i-J- in. across, tomentose, olive, blackish 

 purple under the down, edge incurved ; tubes about 2 lines long, 

 yellow ; stem about 2 in. long, vaguely netted above, yellow with 

 red streaks in parts. 



In woods. 



B. olivaceits. — Cap 2-3 in. across, edge incurved at first, smooth, 

 brownish olive ; tubes 2-3 lines long ; stem thin above, becomes 

 swollen below, yellow above, remainder crimson. 



In woods. 



B. fragrans. — Cap 1-4 in. across, dark brown, edge incurved, 

 downy, flesh thick, yellowish, blue or greenish, then reddish when 

 broken ; tubes almost free from stem, | in. long, greenish ; stem 

 stout, with yellow and red portions. 



Cap sometimes bronze-brown or with purple shades ; often grows 

 in clusters. 



In woods under oaks, etc. 



B. cBstivalis. — Cap 5-8 in. across, whitish or pale buff, edge often 

 wavy ; tubes short round stem, | in. or more long, yellow ; stem 

 3 in. long, thick, more or less bulbous. 



One of the largest species. Edible. 



In pastures under trees, etc. 



B. fulvidus. — Cap 2-3 in. across, silky-shining, firm, foxy 

 brown ; tubes depressed round stem, white, then yellow, tinged 

 olive when old; stem stout, about 2 an. long, coloured like the 

 cap. 



On the ground under trees. 



B. castaneiis.— Much resembling B. fulvidus, but readily dis- 

 tinguished by the minutely velvety stem. 



In woods. 



B. spadiceus. — Cap 2-4 in. across, expanded, downy, bay-brown, 

 often cracked ; tubes |-| in. long, pores minute, yehow ; stem 2-3 

 in. long, narrowed upwards, scurfy, yellowish brown. 



In woods. Solitary or in small clusters. 



B. vaccinus.—Cap 2-4 in. across, minutely downy, deep chestnut- 

 colour ; tubes almost free from stem, white, then yellow ; stem 

 stout, paler than cap. 



Differs from B. hadius in downy, dry cap and minute pores. 

 Often in small clusters. 



In woods, especially under beeches. 



