CLASSIFICATION 363 



B. regi'iis. — Cap 3-5 in. across, convex, downy, bright rose-pink, 

 pores golden yellow ; stem 2-3 in. long, yellow except the base, 

 which is dingy purple, network vague. 



On the ground in open places. 



B. crassns. — Cap 3-5 in. across, often wavy, densely tomentose, 

 pale yellow-brown, flesh white, then pale primrose-yellow ; tubes 

 |-| in. long, shorter round the stem, pores whitish, then pale 

 primrose-yellow ; stem at first glol:)Ose, then lengthened to about 

 2 in. and nearly as thick, paler than the cap, upper part with a 

 conspicuous network. 



Differs from B. impolitiis in yellow flesh and reticulated stem. 

 Differs from B. pachypus in the stem not becoming elongated, 

 and absence of green in pores. 



In woods and under trees in pastures. 



B. collinitus. — Cap 3-4 in. across ; smooth, even, at first covered 

 with brown gluten, then pale ; pores pallid, then yellow ; stem 

 2-3 in. long, stout ; narrowed downwards, whitish, then tinged 

 brown, more or less covered with adpressed scales, giving it a 

 netted appearance. 



Much resembling B. liiteus, but without a trace of a ring. 



In fir woods. 



2. Surface of hymenhtm red, tubes more or less olive. 



B. satanus. — Cap 4-5 in. across, smooth, whitish or tinged buff ; 

 flesh very thick, whitish, first reddish, then bluish or violet when 

 broken ; tubes free from stem, rather short, yellowish, openings 

 minute, blood-red, orange when old ; stem 2-3 in. long, very stout, 

 whitish or yellowish, with blood-red network upwards. 



Cap rather variable in colour but always pale. One of the most 

 beautiful of our fungi. Poisonous. 



In woods. 



B. luridus (PI. XXVII, fig. i). — Cap 3-6 in. across, downy, colour 

 variable, usually dingy brown with an olive tinge ; flesh yellow, 

 changing at once to indigo-blue when cut ; tubes shortened round 

 stem, greenish olive, pores vermilion, orange or reddish brown ; 

 stem short, more or less swollen, variegated red and yellow with an 

 indistinct network. 



In woods and under trees in pastures. 



B, purpureus. — This is the only remaining species having greenish 

 tubes and red pores, and is readily distinguished by the deep 

 purple-red cap and purple to orange-red pores. 



3. Tubes and pores both red. 



B. rubinus. — Cap 2-3 in. across, downy, pale yellow-brown ; 

 tubes and pores carmine ; stem streaked red and yellow. 

 Our only Boletus with clear red tubes. Flesh 5'ellow. 

 On the ground under trees. 



