128 THE POLYPORACEAE OF WISCONSIN. 



Boletus chromapes Frost. 



Pileus convex or nearly plane, slightly and sometimes fasciculately 

 tomentose, pale-red, flesh white, unchangeable; tubes subadnate, more 

 or less depressed around the stem, white or whitish, becoming brown; 

 stem equal or slightly tapering upward, scabrous-punctate, whitish or 

 pallid, chrome-yellow at the base both without and within, sometimes 

 reddish above; spores oblong, 11 to 14 microns long, 4 to 5 microns 

 broad. 



Pileus 5 to 10 cm. broad ; stem 5 to 10 cm. long, 8 to 12 mm. thick. 

 Woods. 



A number of specimens of this species were found near Carr Lake in 

 an old tote- way, and Mr. Dodge finds it also near Algoma. The largest 

 specimen was about 5 cm. in diameter, 1 to 1.4 cm. thick; the stipe was 

 4 cm. long and nearly 1 cm. thick. The pileus was rose-color on top and 

 slightly viscid when moist. The flesh was white and unchangeable ; the 

 tubes white, subfree, small, changing to pinkish then sordid when 

 bruised. The stipe is even, slightly scabrous, whitish, chrome-yellow at 

 the base. This color at the base seems to be constant in the old as well 

 as the very young specimens and hence is one of the best characters by 

 which the species may be identified. 



D. Favosi. Pores large, angular, unequal, adnate, depressed. 



Boletus viscidus Linn. (Plate XVI, fig. 57). 



Pileus pulvinate, soft, glabrous, viscid, dirty-yellow, veil subannu- 

 late, lacerate, white, subappendiculate ; stipe viscous, white, becoming 

 yellow, base thickened, reticulated above; tubules adnate, pores large, 

 unequal, greenish. 



In deciduous forests. Pileus 5 to 10 cm. broad; spores black to fus- 

 cous. 



"Linnaeus' name is appropriate, for not only is the pileus viscid but 

 the stipe and veil become dissolved in viscous gluten. B. larfcinus is a 

 related form. The pores are radially elongated and smaller than in 

 B. laricinus." (9, p. 78). 



Specimens of this Boletus are every summer abundantly found on the 

 University grounds at Madison. The largest is about 8 cm. in diameter ; 

 the stipe about 6 cm. long. The chief peculiarities of this species are the 

 radially elongated pores, the thick gluten of the pileus and stipe and 

 the dirty-yellow color. Sometimes there is a livid or greenish tinge to 



