American Boletes 



3. CERIOMYCES Batt. 



Hymenophore annual, terrestrial, centrally stipitate; surface 

 dry, rarely viscid, glabrous or variously ornamented; context 

 usually white or yellow, sometimes tinged with certain other 

 colors, very rarely poisonous; tubes free or adnata, small, cylin- 

 dric, sometimes large and angular near the stipe; spores oblong- 

 ellipsoid, smooth, ochraceous to yellowish-brown; stipe solid, 

 except in one or two species, even or reticulate, exannulate. 



Stipe shaggy and lacerate, with reticulate furrows. 

 Pileus dry, tomentose or reddish-pilose. 

 Pileus viscid, glabrous. 

 Stipe smooth or reticulate with veins. 



Tubes white, not stuffed when young and not turning 

 blue when wounded, colored at maturity with 

 the yellowish-brown spores; pileus glabrous (a 

 few subtomentose species have whitish tubes 

 when young). 

 Stipe smooth; pileus white, smooth. 

 Stipe reticulate. 



Pileus white, with deep chinks forming areolae. 

 Pileus gray, smooth. 

 Stipe scabrous; pileus smooth, rarely white. 



Stipe conspicuously bright-yellow near the 



base. 

 Stipe entirely white or grayish-white. 

 Tubes flesh-colored; pileus glabrous, floccose, or 

 squamulose. 

 Pileus glabrous. 



Pileus adorned with appressed yellowish fiocci. 

 Pileus adorned with conspicuous dark-purple 

 scales. 

 Tubes bright-yellow, sometimes tinged with scarlet, 

 unchanging at maturity or in dried specimens. 

 Stipe smooth; pileus glabrous. 



Stipe 2 cm. thick; spores 15 X 6 ;*. 

 Stipe less than i cm. thick; spores 10 X 4 /i. 

 Stipe reticulate; pileus and stipe covered with a 

 bright-yellow or scarlet tomentum or pul- 

 verulence. 

 Tubes some shade of yellow or brown, rarely green- 

 ish, usually becoming darker with age (in 

 C. fumosipes, C. sordidus, and C. Roxanae, the 

 tubes are whitish when young). 

 Parasitic on species of Scleroderma. 

 Found in clusters on roots and stumps of pine; 



pileus bright-golden-yellow. 

 Found on the ground, rarely on wood much de- 

 cayed and then not in clusters. 



1. C Russellii. 



2. C. Betula. 



3. C. albeUus. 



C. frustulosus. 

 C. griseus. 



C. chromapes. 

 C. viscidus. 



C. griseo-roseus. 

 C. conicus. 



10. C Vanderbiltianus. 



C. flaviporus. 

 C. auriporus. 



13. C auriflammeus. 



14. C. parasiticus. 



IS. C hemichrysKs. 



