I70 NEW YORK STATE MUSEUM 



are of medium size, with viscid caps, yellow or ochraceous tubes and glan- 

 dular dotted sterns. The species now under consideration has a yellow, vis- 

 cid cap which when young usually has a few flakes or fragments of the pale 

 woolly veil on the margin. Sometimes it becomes spotted by the drying of 

 the viscid substance on it. The flesh is pale yellow, and the tubes are at 

 first pale yellow with small mouths, but they become darker or dingy ochra- 

 ceous with age, and their mouths become larger and angular. The stem is 

 nearly cylindric, short, stout, solid, collarless, glandular dotted and yellow 

 both externally and internally. The dots are generally brown or yellowish 

 and brown intermingled, and they are sometimes arranged in an obscurely 

 reticulated manner. This boletus grows under or near pine trees or in 

 places formerly occupied by them. It may be found in suitable weather 

 during July and August. The caps are 2 to 4 inches broad; the stem 1.5 

 to 2.5 inches long, 4 to 6 lines thick. It most resembles the American 

 boletus, B. americanus, from which it may be separated by its thicker 

 stem and cap, smaller and brighter colored tubes and more agreeable flavor. 

 On account of its disagreeable flavor when raw, I have hesitated to test the 

 edibility of the American boletus, though it is a common species in pine 

 regions. Possibly its disagreeable flavor would be destroyed by cooking. 



Boletus clintonianus Pk. 



Clinton's Boletus 



PLATE 63, fig. I-S 



Pileus convex, very viscid or glutinous, glabrous, golden yellow, reddish 

 yellow or chestnut color, flesh pale yellow or whitish, tubes adnate, their 

 mouths small, angular or subrotund, pale yellow when young, ochraceous 

 when mature, changing to brown or purplish brown where bruised ; stem 

 equal or slightly thickened at the base, annulate, solid, yellow above the 

 annulus, colored like the pileus below, the annulus thick, persistent, white or 

 whitish ; spores brownish ochraceous, .0004 to .00045 °f an mcn l° n &> .00016 

 to .0002 broad. 



Clinton's boletus is variable in color. In the typical form the color is 

 reddish brown or chestnut, but specimens occur in which it is reddish yel- 

 low or even golden yellow. The surface of the cap is very viscid when 



