American Boletes 25 



44. Ceriomyces subtomentosus (L.) Murrill 



Pileus convex to expanded, 4-10 cm. broad; surface dry, 

 tomentose, often rimose-areolate, yellowish-brown, reddish- 

 brown or subolivaceous; margin entire, often involute when 

 young; context white or yellowish, unchanging, yellow beneath 

 the cuticle, taste mild; tubes adnate or slightly depressed, often 

 becoming nearly free, yellow, unchanging when wounded, 

 greenish-yellow at the maturity of the spores, mouths large, 

 irregular, sometimes compound, usually angular; spores greenish 

 when fresh, fading to yellowish-brown, subfusiform, smooth, 

 10-12 X 4-5 fi; stipe ventricose or nearly equal, tapering below, 

 furfuraceous to glabrous, even or wholly or partially reticulate, 

 pale-yellow or slightly brownish, often flavous above, reddish- 

 brown when bruised, solid, white or yellowish within, 4.6 cm. 

 long, 0.5-1.5 cm. thick. 



Very common in deciduous woods throughout temperate 

 North America. Edible. 



45. Ceriomyces tomentipes (Earle) Murrill 



Pileus thick, convex to expanded, 9-13 cm. broad, about 3 cm. 

 thick; surface dry, minutely tomentose to glabrous, umbrinous; 

 context whitish or discolored, changing to blue when wounded; 

 hymenium ventricose, deeply and broadly sinuate-depressed, 

 decurrent ; tubes sordid-yellow, becoming brick-red when wound- 

 ed or on drying, mouths small, about i mm. broad, circular; 

 spores ellipsoid, brownish, about 14 X 7 m; stipe cylindric, 

 densely but minutely velvety-pubescent, sometimes becoming 

 nearly glabrous above, brick-red, flecked with brown below, 

 solid, 8-13 cm. long, 2.5-3.5 cm. thick. 



Found only at Stanford University, California, among decaying 

 oak leaves. 



46. Ceriomyces fumosipes (Peck) Murrill 



Pileus convex, 4-7 cm. broad, about 1-1.5 cm. thick; surface 

 tomentose, avellaneous with light-bay spots to umbrinous or 

 dark-olive-brown, very distinctly reticulate-rimose, the cracks 

 becoming wider and whitish in color in older plants, while the 

 areoles between contract almost into tufts, especially toward the 

 margin, which is entire, fertile; context firm, fleshy, white, chang- 

 ing slowly and slightly to pale-blue, taste sweet; tubes plane in 

 mass, somewhat depressed at maturity, equaling the thickness 

 of the context, greenish-white to avellaneous; spores ellipsoid, 

 smooth, deep-ochraceous-brown, 14-16X7-8/*; stipe some- 



