PORE FUNGI 93 



Boletinus porosus Veined Boletinus 



Cap 5-12 cm. wide, vellow-brown, brown or red-brown, smootli and shining, 

 sticky when wet. plane to depressed, usually incomplete and irregular, becoming more 

 or less shelf-like; flesh whitish or yellowish; stem lateral or excentric. 1-3 cm. 

 by about 1 cm., like the cap in color, expanding into the cap and hence netted abme 

 by the decurrent tubes ; t u b e s in radiating rows with more prominent lines between, 

 yellowish brown; spores yellowish, ovoid, 9-11 X 6-8^. The name refers to tlie 

 appearance of the tubes. 



Common on the ground in woods, summer and autumn; edible. 



FOMES 



Cap thick, woody, bracket- or shelf-like, perennial, showing usually several 

 aimual rings or zones of growth. Closely related to P o 1 y p o r u s and P o 1 y- 

 s t i c t u s but distinguished by the thick perennial cap. The plants are too woody 

 to be edible, but they are of much importance, owing to the damage which they do 

 to standing trees, upon which they grow. The name refers to the thick, almost 

 swollen cap. 



Key to the Species 



1. Pore surface co'\-ered bv a distinct veil, or volva F. volvatus 



2. Pore surface without a veil 



a. Cap large and shelf-like 



( 1 ) Cap smooth and whitish or white F . applanatus 



(2) Cap rougher, red-brown or dark brown F. pinicola 



b. Cap more or less hoof-like 



( 1 ) Cap reddish brown, pale within F. fraxinophilus 



(2) Cap black or brownish black, brown within F. iguiaiiiis 



Fomes volvatus Volvate Fomes 



Cap 1-3 cm. wide, whitish or yellowish, more rarely brownish, smooth, shining, 

 zoneless, stemless, or with a verv small knob-like stem, thick, globoid or ovoid, 

 more or less shelving; pores covered for some time by a membrane "which persists 

 at the margin, brownish or brown; spores ellipsoid, pinkish, 9-12 >, 5-6/.i. The 

 name refers to the volva-like membrane. 



( )n trunks of spruce and fir, persisting from year to year. 



Fomes applanatus Shelf Fomes 



Cap 20-40 cm. wide, whitish or yellowish, more rarely brownish, smooth, with 

 a firm crust, woody, zoned, shelf-like, stemless; pores tiny, whitish to rust-lirown ; 

 spores rarely present. 'l"he name refers to the shelf-like ca)). 



Common on trunks of trees, typically deciduous sjiecies; perennial. 



