BOLETUS. 287 



In woods and under trees in pastures, &c. The pure 

 white flesh of young specimens becomes pale primrose- 

 yellow when cut or broken and exposed to the air ; smell 

 strong, acid, taste sweet and nutty. 



Allied to Boletus impoUfus, but distinguished by the un- 

 dulated, yellow-brown pileus, glabrous, conspicuously re- 

 ticulated stem, and clear pale primrose-yellow flesh. The 

 subglobose stem is also characteristic. There is no tinge of 

 blue about the flesh at any age. Boletus imclujpus difiers 

 from the present species in the stem, which is at first sub- 

 globose, becoming elongated and subequal, the greenish 

 pores, and the larger spores. 



Boletus collinitus. Fr. 



Pileus 3-4 in. across, convex then expanded, smooth, even, 

 at first covered with brown gluten, which eventually dis- 

 appears, leaving the pileus pale, flesh white ; tubes adnate, 

 ^ in. or more in length, openings rather large, mostly 

 divided in two, pallid then yellow, naked ; stem 2-3 in. 

 long, up to 1 in. thick at the apex, attenuated downwards, 

 firm, without trace of a ring, whitish becoming tinged with 

 brown, more or less covered with adpressed scales that give 

 to it a reticulated appearance. 



Boletus collinitus, Fries, Epicrisis, p. 410 ; Stev., Brit. Fung., 

 p. 169. 



In fir woods. Solitary. Stature and colour of Boletus 

 luteus, but without a trace of a ring on the stem at any age. 

 A rare species, of which no figure exists ; Fries says that 

 Krombholtz, t. 76, figs. 10, 11, are allied, but the tubes are 



green. 



B. Openings of tubes red. 



Boletus satanus. Lenz. 

 Pileus 4^S in. acfoss, convex, soft, glabrous, slightly viscid, 

 whitish or pale buff, flesh very thick, becoming at first red- 

 dish when broken, then bluish or violet ; tubes rather short, 

 free from the stem, yellow, openings minute, edges of the 

 dissepiments from the first blood-red, becoming orange when 

 old; stem very stout ovato-ventricose, 2-3 in. long, and 

 almost as wide at the thickest part, whitish or pale dingy 



