CLASSIFICATION 365 



minute, grey ; stem 4-5 in. long, pale, rugulose or squamulose, 

 tapering upwards. 



Differs from B. scaber in tomentose cap and grey pores. 



In woods among heather, etc. 



B. aliitarius. — Closely allied to B. felleus, differing in the more or 

 less bulbous stem, unchangeable flesh and mild taste. 



In woodland pastures. 



B. porphyrosporus. — Cap 4-6 in. across, minutely velvety, dark 

 olive or brownish umber, becoming blackish when bruised, flesh 

 blue near the tubes when cut ; tubes |--| in. long, pores angular, 

 grey, then pale brown, umber when bruised ; stem 4-5 in. long, 

 stout, dingy greyish umber or brownish with an ochraceous tinge, 

 minutely punctate. 



Smell very strong. Spores purple in the mass, when thrown 

 down on white paper, a character which marks this species. 



Woods and among grass under trees, etc. 



Sub-Genus Gyrodon 



Identical in structure and general appearance with Boletus, 

 differing only in the very short tubes and wavy or sinuous pores of 

 the hymenium. 



B. ccBspitosus. — Clustered, stems more or less grown together at 

 the base. Cap 1-2 in. across, hemispherical, edge often wavy, olive- 

 umber, becoming paler towards the edge, which is pink and downy ; 

 flesh yellow, changing to an intense blue when broken ; tubes 

 about I hue long, pores very irregular, elongated and wavy, yellow ; 

 stem i|— 2 in. long, yellow, base often red. 



Distinguished by the clustered habit, and by the ^•ery short, 

 wavy pores. 



Among grass, under trees. 



B. sistotrema. — Cap smooth, rufous or yellowish brown ; tubes 

 short, unequal, pores wavy, yellow ; stem pale rufous, or tinged 

 pale brown. 



Dry woods. 



B. McWeenyi. — Cap convex, smooth, red, centre purplish, edge 

 yellowish, about i in. across ; stem smooth, bright 5'enow ; pores 

 wavy, yellow. 



On the ground among moss. 



Strobilomyces 



Cap fleshy, becoming tough, covered with large overlapping 

 scales ; tubes not easil}/ separating from the flesh of the cap. 



Resembling a Boletus, but with a scaly cap. The spores are also 

 globose, whereas in Boletus they are elongated. 



S. strobilaceus.—CsLp fleshy, convex, 3-5 in. across, densely 

 covered with large brown scales, edge of cap usually bearing frag- 



