Polyporaceae 



7. Pileus some shade of brown or gray 9 Boletus. 



8. Stem pallid or yellowish B. rubignosus 



8. Stem dark-brown B. ferrugineus 



9. Pileus pale-brown, stem flexuous B. flexuosipes 



9. Pileus gray or grayish-black, stem straight B. griseus 



Peck, Boleti of the U. S. 



B. Specio'silS Frost handsome. Pileus at first very thick, subglo- 

 bose, compact, then softer, convex, glabrous or nearly so, red. Flesh 

 pale-yellow or bright lemon-yellow, changing to blue where wounded. 

 Tubes adnate, small, subrotund, plane or but slightly depressed around 

 the stem, bright lemon-yellow, becoming dingy-yellow with age, chang- 

 ing to blue where wounded. Stem stout, subequal or somewhat bul- 

 bous, reticulated, bright lemon-yellow without and within, sometimes 

 reddish at the base. Spores oblong-fusiform, pale ochraceous-brown, 

 10-12.5x4-5/4. 



Pileus 3-7 in. broad. Stem 2-4 in. long, 10-24 lines thick. 



Thin woods. New England, Frost; New York, Peck. 



This is a very beautiful Boletus. When young the whole plant ex- 

 cept the surface of the pileus is of a vivid lemon-yellow color. Wounds 

 quickly change to green, then to blue. The color of the pileus ap- 

 proaches closely to solferinp. Peck, Boleti of the U. S. 



Caps of specimens found in mixed woods at Mt. Gretna, Pa., were 

 minutely areolate when old. Stems yellow at top and with purplish red 

 over the bright yellow toward the bulbous base, solid, bright yellow 

 within. 



Stems and caps are edible and rank high in flavor and texture. 



B. illu'dens Pk. deceiving. (Plate CXVIII, fig. 3, p. 436.) Pileus 

 convex, dry, subglabrous, yellowish-brown or grayish-brown, sometimes 

 tinged with red, especially in the center. Flesh pallid or yellowish. 

 Tubes bright yellow, plane or somewhat convex when old, adnate, their 

 mouths angular or subrotund, often larger near the stem. Stem nearly 

 equal, sometimes abruptly pointed at the base, glabrous, pallid or yel- 

 lowish, coarsely reticulated either wholly or at the top only. Spores 

 oblong or subfusiform, yellowish-brown tinged with green, 1 1-12. 5x4-5/4. 



Pileus 1-5-3 in - broad. Stem 1.5-2.5 in. long, 3-5 lines thick. 



439 



