AMERICAN BOLETES 



Tubes stuffed when young, their mouths 



usually white; pileus usually glabrous. 

 Stipe furfuraceous, lilac-gray; pileus and 



tubes chocolate-brown. 

 Stipe smooth or reticulate; pileus and 



tubes of lighter color than above. 

 Spores brownish-ochraceous, 13-15 X 



4-5 n; stipe more or less reticulate. 

 Spores ferruginous-ochraceous, 9-12 X 

 4-5 M; stipe rarely reticulate at the 

 top; pileus often olivaceous and 

 spotted. 

 Tubes not stuffed when young. 



Pileus distinctly viscid, glabrous, yellow or 

 fulvous, sometimes ' more or less 

 reddish-brown; stipe not reticulate. 

 Tubes brick-colored, flesh peppery; 



stipe solid, yellow at the base. 

 Tubes yellow, flesh mild. 

 Stipe hollow, glabrous. 

 Stipe solid, dotted with yellow or 



red glandules. 

 Stipe solid, not dotted. 

 Tubes pale-greenish; a tropical species. 

 Pileus glabrous or subtomentose, rarely 



papillate, not viscid. 

 Stipe reticulate, usually very distinctly 



so. 



Pileus, tubes, and stipe tawny- 

 brown. 

 Pileus red. 



Context changing to blue when 



wounded. 



Stipe bright-lemon-yellow 

 throughout; pileus with- 

 out a bloom. 



Stipe red below, yellow 



above; pileus with a bloom. 



Context not changing to blue 



when wounded. 

 Pileus chocolate-red, 3-4 cm. 



broad. 



Pileus testaceous, fading to 



ochraceous, 5-1 1 cm. broad. 



Pileus bay, conspicuously 



papillate, 12 cm. broad. 

 Pileus yellow or brown; tubes yel- 

 lowish. 

 Temperate species. 



16. C. eximius. 



17. C. crassus. 



1 8. C. affinis. 



19. C. ferruginatus. 



20. C. Curtisii. 



21. C. inflexus. 



22. C. Atkinsonianus. 



23. C. jalapensis. 



24. C. labacinus. 



25. C. speciosus. 



26. C. Peckii. 



27. C. Housei. 



28. C. sitbsanguineus. 



29. C. mirabilis. 



,n 



