THE POLYPORACEAE OF WISCONSIN. 145 



The largest was 10 cm. in diameter, with a stipe 5 cm. long, and 1 cm. 

 thick. The pileus is broadly convex, brownish-yellow, viscid, margin 

 thin. Pores adnate to subdecurrent, small bi-compound, at first pale 

 yellow then bright sulphur yellow. Stipe soft, brittle, flexuous, 

 smooth; whitish, yellow above. Flesh pale yellow. 



Boletus subluteus Peck. 



Pileus convex or nearly plane, viscid or glutinous when moist, often 

 obscurely virgate-spotted, dingy yellowish, inclining to ferruginous- 

 brown, flesh whitish varying to dull yellowish ; tubes plane or convex, 

 adnate, small, subrotund, yellow becoming ochraceous ; stem equal, slen- 

 der pallid or yellowish, dotted both above and below the annulus with 

 reddish or brownish glandules, annulus submembranous, glutinous, at 

 first concealing the tubes, then generally collapsing and forming a nar- 

 row whitish or brownish band around the stem; spores subfusiform, 

 ochraceo-ferruginous, 7.6 to 11 microns long, 4 to 5 microns broad. 



Pileus 3 to 8 cm. broad ; stem 3 to 6 cm. long, 4 to 8 mm. thick. Sandy 

 soil in pine woods. 



This is the commonest Boletus near Sand and Star Lakes in Forest 

 County during the month of August. A few specimens were also col- 

 lected near Ladysmith. They grew abundantly in sandy soil at the 

 edge of mixed woods. The largest specimen measured 11 cm. in diam- 

 eter ; the stipe was 8 cm. long and 1 cm. thick. 



Peck's (21, 2, 8, p. 91) description characterizes our Wisconsin spe- 

 cimens exactly. It only remains to be noted that the glandules of the 

 stem become blackish with age and persist even in drying. The whole 

 plant becomes a dingy dark-brown in drying and shrinks to less than 

 one-half its size. 



Closely related to B. lutcus and B. punctipes. It is smaller and more 

 slender than B. luteus, and its stem is dotted from top to bottom. B. 

 punctipes lacks the annulus. 



Boletus spectabilis Peck. (Plate XVI, fig. 58). 



Pileus broadly convex, at first covered with a red tomentum, then 

 squamose, viscid when moist, red, the tomentose scales becoming grayish- 

 red, brownish or yellowish, flesh whitish or pale-yellow; tubes at first 

 yellow and concealed by a reddish glutinous membrane, then ochraceous, 

 convex, large, angular, adnate; stem nearly equal, annulate, yellow 

 10 



