POLYPORUS. 245 



plane ; allied to Polyporus hispidus, but softer, &c. : for fuller 

 distinctions see under the latter. 



Imbricated, pilei growing into each other, obsoletely 

 zoned, rather triquetrous ; varies " substipitate " and re- 

 supinate ; tomentum strigose or velvety, at length dis- 

 appearing. Pores small, subrotiind, greyish pruinose, shining 

 when looked at with the light falling on them, at length 

 naked, torn, substance fibrous, hard, but not persistent when 

 dead. (Fries.) 



Polyporus quercinus. Fr. 



Pileus tongue-shaped, horizontal, narrowed behind into a 

 thick stem, 3-6 in. long, 2-3 in. broad, up to 1 in. thick, 

 convexo-plane, floccoso-granular, pale tan or tinged red, and 

 becoming reddish when bruised ; substance coloured, corky, 

 texture floccose, soft then hardened ; tubes about 2 lines 

 long, pores rounded, ^-4 mm. across, whitish ; spores 

 colourless, narrowly elliptical o x 2, fx. 



Polyporus quercinus, Fr., Epicr., p. 441 ; Stev,, Brit. Fung., 

 p. 203. 



On dead oak trunks. Somewhat resembling, in form and 

 general appearance, Fistulina hepatica, from which, however, 

 it is generically distinct. 



Polyporus Keithii. B. & Br. 



Shell-shaped, effuso-reflexed, narrowed behind, about i in, 

 across ; pileus reddish-brown, rough with rigid spine-like 

 points ; pores large, angular, pallid, dissepiments torn ; 

 spores colourless, elliptical, 6 x 3 /z. 



Polyporus Keithii, B, & Br,, Ann. Nat. Hist,, n, 1430 ; Stev,, 

 Brit, Fung,, p. 201. 



On fallen sticks. The pores average about f mm. in 

 diameter. 



Polyporus crispus, Fr, 

 Horizontal, eft'used behind, thin, pliant, then coriaceous, 

 tough, floccoso-ruguluse, when young smoky-black, zoneless, 

 the thin crisped or wavy margin whitish ; when full grown 

 the pileus becomes pallid or greyish, and the margin 

 blackish ; pores about 1 line long, rather large, unequal, at 

 length torn, silvery grey ; spores elliptic-oblong, colourless, 

 5-6 X 3 /x. 



