276 FUNGUS-FLOKA. 



Finally, I have collected specimens in Epping Forest 

 having the pileus and incurved stem dingy tan-colour, tubes 

 at first yellow, then dingy cinnamon. 



Boletus duriusculus. Schulz. 



Pileus 2-5 in. across, hemispherical, minutely velvety, 

 viscid when moist, varying in colour from pale brown, 

 through dingy chestnut, to umber-brown, often becoming 

 cracked in an areolate manner when dry, interstices paler ; 

 flesh thick, white or tinged yellow, when cut becoming red- 

 dish copper-colour ; tubes ^-f in. long, shortened round the 

 stem and free, openings about mm. across, often compound, 

 irregularly angular, bright yellow ; stem 4-7 in. long, fusi- 

 form, thickest part 1| 2 in. across, situated below the middle, 

 yellowish, rough with blackish points, which are sometimes 

 arranged in a subreticulate manner, apex sometimes more or 

 less grooved, solid, flesh of upper part becoming coppery like 

 the pileus; spores elongate-cylindrical, pale umber, 14-16 x 

 5-6^. 



Boletus duriusculus, Schulzer, Icon. Sel. Hymen. Hung., 

 p. 51, t. xxxiii., fig. 1 ; Fries, Hym. Eur., p. 515. 



In woods. Esculent and very delicious. Allied to Boletus 

 scaber, but distinguished by the bright yellow tubes and the 

 very firm flesh, which turns coppery-red when exposed to 

 the air; this colour eventually changes to a dingy greyish- 

 violet. Also allied to Boletus porphyrosporus. 



Boletus pruinatus. Fr. 



Pileus 23 in. across, convex, becoming expanded, rigid, 

 dry, purplish-bay or dark cinnamon with a red tinge, covered 

 with an umber-coloured bloom, flesh rather thin, white, 

 becoming indistinctly greenish or bluish sometimes ; tubes 

 about ^ in. long, openings minute, rounded, yellow ; stem 

 about 2 in. long, i in. thick above, rather ventricose towards 

 the base, even, smooth, yellow, more or less streaked with 

 red. 



Boletus pruinatus, Fries, Bolet., p. 9 ; Stev., Brit. Fung., 

 p. 174. 



In grassy ground under trees, &c. Solitary, or often more 

 or less clustered, with somewhat the habit and appearance of 

 certain forms of Boletus chrysenteron, but distinguished by the 



