POLYPORUS 243 



IV. APUS. 



Pileus sessile, dimidiate or effuso-reflexed. 

 * Pileus ferruginous, brownish, or dark fuliginous. 



Polyporus dryadeus. Fr. 



Pileus 3-10 in. or more broad, 2-3 in. thick, horizontal, 

 pulvinate, fleshy then corky, cuticle thin, soft, smooth, 

 rugged becoming even, ferruginous then brown ; flesh 

 ferruginous, somewhat zoned, rather velvety-fibrous when 

 cut ; tubes i-li in. long, thin, round, soft, ferruginous, 

 openings rounded, paler, about mm. across, dissepiments 

 entire ; spores colourless, elliptical, 5 x 3 /A. 



Polyporus dryadeus, Fries, Syst. Myc. i. p. 374 (in part) ; 

 Fries, Hym. Eur., p. 553 ; Stev., Brit. Fung., p. 202. 



On oak trunks. 



Smell strong, subacid. Growing rapidly and attaining a 

 large size. Annual, but persisting through the winter. 

 Exuding drops of water at the margin like P. applanatus, 

 from which, however, it is quite distinct. Odour slightly 

 acid. Everywhere imbricated, 5 in. broad, 1 in. thick, with 

 indistinct ferruginous zones ; pores short, slightly larger 

 than in Polyporus fomentarius, ferruginous within. Margin 

 sometimes exuding drops of water. (Fries.) 



Polyporus hispidus. Fr. 



Pileus laterally attached, horizontal, 4-8 in. broad, dimi- 

 diate, more or less convex, compact, fleshy, ferruginous- 

 brown, hispid ; flesh spongy, 1-2 in. thick, ferruginous, 

 composed of diverging fibres; pores ^1 in. long or more, 

 yellowish then brownish, but paler than the pileus, minute, 

 margin fimbriated, often inclined to separate ; spores 

 elliptic-oblong, obliquely apiculate, bright orange-brown, 

 10 x 7 /i. 



Polyporus hispidus, Fries, Syst. Myc. i. p. 362 ; Stev., Brit. 

 Fung., p. 201. 



On living ash trunks, &c. Variable in size and colour, 

 subferruginous, when old often blackish-brown, rather soft 

 and spongy. Pores -1 mm. across. When any part of 

 the fungus is treated with ammonic or potassic hydrate, it 

 yields a deep yellow-brown colouring-matter. Distinguished 



R 2 



