RASIDIOMYCETES 393 



angular, about -\ mm. across, powdered with while at first, 

 then ferruginous ; spores brown, elliptical, base abruptly 

 truncate, 6x 3 "5-4 f^- 



Fomes igniarius, Fries, Sys^. Myc, i. p. 375. — At first 

 tubercular, immarginate, even, with a thin, flocculose, 

 adpressed hoary covering, then thinly hoof-shaped, fer- 

 ruginous, at length blackish-brown, opaque, cuticle very 

 hard, margin rounded ; 10-15 cm. across, sometimes larger; 

 flesh zoned, ferruginous, very hard ; tubes 2-6 cm. long, 

 stratose, very small, when old, filled with white mycelium, 

 general surface of hymenium convex, pores J-J mm. across, 

 rounded, at first hoary ; spores subglobose, hyaline, 6-7 //, 

 cystidia few, 10-25 X 5-6 /x. 



Fomes pinicola, Fries, Elench.^ p. 105. — Pileus woody, 

 pulvinate, then hoof-shaped, glabrous, unequal, tawny, then 

 becoming blackish, margin cinnabar when mature ; flesh 

 hard, pallid ; pores minute, pallid, then yellowish-white. 



Large, truly perennial and reviving, growing by additions 

 to the margin, pores not distinctly stratose ; odour acid. 



Fomes fulvus. Fries, Epicr.^ p. 465. — Pileus woody, very 

 hard, triangular in section, sessile, attached by a broad 

 base, even (not concentrically sulcate), at first villose, 

 tawny inside and out, then hoary ; pores short, rounded, 

 minute, cinnamon, at first covered with a greyish-yellow 

 bloom ; three to four in. across, sometimes imbricated. 



Fomes annosus. Fries, Syst. Myc, i. p. 375. — Very 

 irregular in form, often horizontal and imbricated ; pileus 

 convex, becoming plane, tuberculoso-zoned, radiately 

 rugulose, during the first year brown, silky, margin 

 whitish, second season covered with a glabrous, blackish- 

 brown rigid cuticle, 10-16 cm. across; flesh rather thick, 



