Polyporaceae 



tapering downward, streaked with red, pale-yellow at the top, white at Boletus, 

 the base, marked at the top by the decurrent walls of the tubes. 



Pileus 2.5-10 cm. broad. Stem 2.5-5 cm - l n g) 2-4 cm. thick. 



Solitary, gregarious or cespitose. Under beech trees. West Phila- 

 delphia, Pa. August. C. Mcllvaine. 



This is a very showy species, easily recognized by its bright-red vis- 

 cid pileus and its short, thick and uneven or somewhat lacunose stem. 

 It is closely related to the European B. sanguineus With., from which 

 it is separated by its minute tubes, its uneven stem and the brownish 

 hues assumed where wounded. 



The spore characters of this and the four succeeding species are un- 

 known, but the other characters are quite distinctive and apparently 

 sufficient for the recognition of the species. The descriptions have been 

 derived from colored figures and other data furnished by Mr. Mcllvaine, 

 who says all are edible. Peck, Bull. Torrey Bot. Club, No. 27. 



When slowly stewed for thirty minutes, there is no better Boletus. 



PULVERULENTI. 



Pileus clothed with a yellow dust or a yellow powdery down. Stem 

 more or less yellow powdered, neither bulbous nor distinctly reticulated. 



The species which constitute this tribe are easily distinguished from 

 all others by the sulphur-colored pulverulence which coats the pileus 

 and stem like a universal veil. They appear thus far to be peculiar to 

 this country. Though strongly resembling each other in the tribal 

 character they are very diverse in other respects. One species, by its 

 viscidity, connects with the preceding tribe ; another by its differently 

 colored tube mouths is related to the Luridi ; and the third is peculiar 

 in its ligneous habitat. 



Plant growing on the ground I 



Plant growing on wood B. hemichrysus 



i. Tubes adnate, of one color B. Ravenelii 



i . Tubes free, with red mouths B. auriflammeus 



Peck, Boleti of the U. S., p. 103. 



B. hemichry'sus B. and C. half-golden. Pileus convex, -at length 

 plane or irregularly depressed, floccose-squamulose, covered with a yel- 

 low powder, sometimes cracked, bright golden-yellow. Flesh thick, 



421 



