274 FUNGUS-FLOEA. 



ending in a rooting base, even, glabrous, deep purple-red ; 

 spores elliptic-fusiform, pale olive, 16 X 4-5 //,. 



Boletus purpurascens, Eostkovius, in Sturm, Or. Fl., t. 8 ; 

 Tries, Hym. Bur., p. 604. 



In woods. Eesembling Boletus purpureus in the purple 

 pileus, but distinguished by the mouths of the tubes being 

 yellow and not red. The tubes become green when bruised. 



Boletus radicans. Pers. 



Pileus 3-4 in. across, convex, then nearly plane and often 

 flexuous, minutely velvety, greyish-olive and becoming 

 yellowish-red, flesh white, unchangeable or with a vague 

 tinge of blue here and there, thick except at the permanently 

 incurved margin ; tubes about ^ in. deep, adnate, openings 

 irregularly angular, bright yellow ; stem 2^3 in. long, 

 |— 1 in. thick at the apex, tapering downwards and ending 

 in a rooting base, solid, yellow, sprinkled with red particles ; 

 spores elliptic-oblong, pale yellow, 16 x 4 ;«.. 



Boletus radicans, Pers., Synopsis, p. 607 ; Fries, Hym. Eur., 

 p. 608. 



On the ground under trees. Allied to Boletus chrysenteron, 

 but distinguished by the permanently incurved margin of 

 the pileus, and the stouter stem tapering downwards and 

 ending in a rooting base; the pores are also smaller, ave- 

 raging ^ mm. across. 



Boletus cyanescens. Bull. 



Pileus 2-5 in. across, convex, becoming expanded and 

 sometimes wavy, closely tomentose or floccoso-squamose, 

 opaque, tan-coloured or brownish, flesh thick, white, becom- 

 ing deep blue when broken; tubes about ^ in. long, free or 

 almost so, openings minute, rounded, white then pale lemon 

 yellow ; stem 2-3 in. long, thickened below, where it is 

 sometimes 1^ in. diameter, villoso-pruinose, coloured like the 

 pileus, stuffed then imperfectly hollow; spores very pale 

 yellow, fusiform, 14r-l% x 4 /a. 



Boletus cyanescens, Bulliard, t. 369; Cooke, Hdbk., p. 260. 



In woods. Pileus 2-5 in. broad, rigid, pale, stra-vy-colour, 

 subfuliginous, the margin acute ; flesh white, when broken 

 changing instantly to the most beautiful azure blue, and 

 when squeezed distilling a blue juice; tubes short, when 

 young scarcely a line long, white or lemon-coloured ; stem 



