CLASSIFICATION 375 



Distinguished by the walls of the wavy pores becoming torn into 

 shreds or teeth as in Sistotrema. 



On dead laburnum, birch, beech, etc. 



P. pallescens. — Pileus fleshy, then corky, 2-4 in. across, even, 

 smooth, zoneless, margin sharp, yellowish ; tubes short, pores 

 minute, rounded, white, then yellowish. 



Somewhat clustered, small and thin. 



On stumps, trunks, branches, etc. 



P. traheus. — White, pileus fleshy, effuso-reflexed, elongated, 

 palhd ; pores minute, edges toothed, white. 



On pine wood. 



P. fragilis.- — -Whitish, becoming spotted with brown when bruised, 

 fleshy, reniform, wrinkled, convex below ; pores slender, tubes 

 elongated, pores wavy, white. 



Distinguished among the soft white species liy becoming brown 

 when bruised. 



On decayed fir wood and stumps. 



P. fibula. — ^ Whitish ; pileus leathery, soft, velvety-hairy, zoneless, 

 often radiately wrinkled, edge entire, sharp, flesh snow-white ; 

 pores small, roundish, walls becoming torn, at length tinged 

 yellow. 



Variable in form, sometimes forming rounded patches. 



On fallen oak branches, worked wood, etc. 



P, adiposus. — Effuso-reflexed or resupinate, soft, pileus white, 

 here and there tinged brown, minutely downy ; pores small, angular, 

 white with tinges of brown. 



Often irregularly effused for several inches, with here and there 

 short free portions of pileus. 



On stumps, and on the ground near roots, wood, etc. 



P. armeniaciis. — Forming resupinate patches of variable size, 

 thin, edge downy ; pores shallow, rounded, rather irregular, pure 

 white, changing to a deep buff-colour on drying. 



Resembling a Poria in general appearance, but the substance is 

 soft. 



On dead wood and branches. 



FOMES 



Pileus hard and woody from the first, co\'ered by a hard crus- 

 taceous cuticle, without colour zones, but often with concentric 

 ridges, tubes elongated, stratified, one stratum (the lowest or outer- 

 most one) formed each year ; perennial. 



Most of the large bracket-shaped, hard, woody fungi grow ing on 

 the trunks of trees belong to this genus, which is recognized at once 

 among the fungi having a porous hymenium by the tubes lieing in 

 distinct strata, indicated by lines, when a section of the fungus is 

 examined. 



