284 FUNGUS-FLOKA. 



blue when broken, sometimes almost unchangeable; pores 

 minute, subrotund, bright yellow, whitish when young, 

 becoming blue when touched ; tubes rather short, yellow, 

 then greenish. (Fries.) 



Boletus edulis. Bull. 



Pileus 4-6 in. across, convex, margin obtuse, smooth, 

 moist, brownish becoming paler towards the margin, flesh 

 very thick, white with a slight reddish tinge below the 

 cuticle ; tubes up to |- in. long, shortened round the stem 

 but not free, openings about ^ mm. across, simple, sub- 

 angular, at first white then yellow, finally greenish ; stem 

 2-3 in long, stout, ventricose, 1^-2 in. at thickest part, very 

 pale brown or buff, upper part with polygonal reticulations 

 formed by thin raised lines, solid ; spores greenish-olive, 

 elongato-fusiform, 1416 X 5 /x. 



Boletus edulis, Bulliard, tab. 60 and 494; Cke., Hdbk., 

 p. 256. 



In woods. Esculent. Sometimes three to four spring 

 from the same point. Reticulations on the stem vary in 

 development, but always evident upwards ; stem sometimes 

 almost equal, rarely rooting. Flesh unchangeable. Fries 

 says the pileus is sometimes white, greyish with a rufous 

 tinge, &c. 



Pileus 6 in. or more broad, pulvinate, at length convexo- 

 expanded, smooth, shining, often rugose, and much cracked, 

 dark umber, paler towards the margin, slightly viscid, 

 extreme margin white, scarcely downy. Flesh turning a 

 little reddish near the epidermis. Tubes nearly free, at first 

 white, then lemon-coloured, at length dull yellow, simple, 

 their orifices angular. Spores large, greenish ochre. Stem 

 4 in. high or more, 2 in. thick, fawn-coloured, incrassated 

 above and below, reticulated. (Berk.) 



I should imagine that the statement by Berkeley, that the 

 stem is incrassated above and below, is a slip, and the word 

 attenuated intended. 



Var. elephantinus, changes to blue when cut or bruised. 

 Schaeffer, t. 277. 



Var. laevipes, Mass. 



Pileus 4-6 in. across, convex, dark brownish-umber, 



