34 American Boletes 



pulverulent, becoming glabrous on the disk, isabelline to testa- 

 ceous or latericeous, the pulverulence being sulphur-yellow, 

 margin entire, flavous; context white or very light yellow, 

 changing slowly to bluish when wounded; tubes plane in mass, 

 adnate, depressed, pale-yellow to umbrinous-olivaceous, changing 

 to greenish-blue when injured, mouths of medium size, sub- 

 circular or slightly sinuate; spores ellipsoid, olive-green when 

 fresh, becoming ochraceous-brown, 10-12 X 5-6 ju; stipe cylin- 

 dric, equal, clothed and colored like the young pileus, solid, 

 yellow within, not changing to blue when wounded, 5-10 cm. 

 long, 0.5-1.3 cm. thick; veil large and conspicuous, bright-lemon- 

 yellow, remaining attached to the stipe in the form of a slight, 

 evanescent, tomentose annulus. 



Occasional in the eastern United States from New England to 

 the Gulf of Mexico, preferring deep shade and often found in 

 thickets of Kalmia and Rhododendron. 



9. STROBILOMYCES Berk. 



Hymenophore annual, terrestrial, centrally stipitate; surface 

 of pileus and stipe blackish and shaggy; context white, at first 

 fleshy, becoming tough ; tubes angular, adnate, white when young, 

 covered with a floccose veil; spores globose or broadly ellipsoid, 

 rugulose, blackish-brown; stipe solid, not reticulate. 



I. Strobilomyces strobilaceus (Scop.) Berk. 



Pileus hemispheric to expanded, 5-10 cm. broad; surface dry, 

 soft and spongy, blackish-umbrinous, adorned with thick, 

 projecting, floccose, squarrose, blackish scales; margin fringed 

 with scales and fragments of the veil; context white or whitish, 

 changing to red and then to black when wounded, mild to the 

 taste, edible; tubes adnate, often depressed, white or cinereous, 

 changing like the context when wounded, becoming brown 

 or blackish with age, mouths large, angular; spores subglobose, 

 asperulate, blackish-brown, 8-1 1 n long; stipe equal or slightly 

 tapering upward, sulcate-striate at the apex, densely floccose- 

 tomentose, brown or blackish below, lighter above, solid, firm, 

 fragile, 6-12 cm. long, 1-2 cm. thick; veil dense, cottony, white 

 to grayish, adhering to the margin and to the stipe in mature 

 plants. 



Very common on shaded banks in woods throughout temperate 

 North America. Edible. 



