122 POLYPOREI. 



Var. sensibilis. Pk. 

 I think our plant growing in the Valley is Prof. Peck's 

 variety, for they are all very sensitive and turn to a livid blue 

 when bruised. 



Common in many of our open woods. Found some beautiful specimens 

 in woods east of AUentown. 



B. innixUS. Frost. Leaning Boletus. 



Pileus, convex, plane, glabrous, yellowish brown, slightly 

 areolated when old, yellow in the interstices, flesh white. 



Tubes, adnate, yellow, unchangeable. 



Stem, slender, short, thickened at the base in large speci- 

 mens, yellowish, streaked with brown, often bent. 



Spores, .0004 to .0002 inch broad. 



Found it growing on clay banks along the edge of woods near Allen- 

 town. It generally leans to one side, with a slightly crooked stem. 



B. pallidus. Frost. Pale Boletus. 



Pileus, convex, becoming plane or centrally depressed, soft, 

 smooth, pallid or brownish white, flesh white. 



Tubes, plane or slightly depressed around the stem, or 

 nearly adnate, pale, whitish yellow, changing to blue when 

 wounded, mouth small. 



Stem, equal, slightly thickened at base, long, smooth, 

 whitish, often tinged with red within. 



Spores, yellow-brown. 



Common in our woods. 



Group III. Subtomentosi. 



The species under this group are nearly the same except by 

 the more evidentl}^ tomentose young pileus. Thus far I have 

 only two species to record indigenous in our Valley ; but those 

 two species are quite common. 



