PORE FUNGI 93 



Boletinus porosus Veined Boletinus 



Cap 5-li (in. \\i(k', NL-llow-brown. brown or red-brown, smooth and shining, 

 slick)- when wcl, plane lo tlepresscd, usually incoiuplele and irregular, becoming more 

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

 b\' about I (in., like the ca]) in color, expanding into the cap and hen<'e netted above 

 by the decurrent tubes; tubes in radiating rows with more prominent lines between, 

 \ellowish brown; spores yellowish, o\-oi{l. 9-11 yc G-H/j.. The name refers to the 

 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 se\'eral 

 annual rings or zones of growth. Closely related to Polyporus and P o 1 y- 

 s t i c t u s but distinguished by the thick perennial cap. The jjlants 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 grcnv. The name refers to the thick, almost 

 swollen cap. 



Key to the Species 



1 . Pore surface covered by 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. plnicola 



b. Cap more or less hoofdike 



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



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



Fomes volvatus Volvate Fomes 



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

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

 min-e or less shelving ; pores covered for some time by a membrane which persists 

 at the margin, brownish or brown; spores ellipsoid, pinkish. 9-12 X 3-6;u.. The 

 name refers to tlie volva-like membrane. 



On trunks of spruce and fir. persisting from year to year. 



Fomes applanatus Shelf Fomes 



C a p 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-brown; 

 spores rarely ])resent. The name refers to the shelf-like cap. 



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



