220 FUNGUS-FLORA. 



On worked wood. 



Eose-colonr without and within, but tinged wirh smoke- 

 colour, especially the pileus, 2-4 inches broad, ^-1 inch 

 thick. Margin subacute. (Fries.) 



*** Pileus ferruginous, hroicnish, taicny, &c., alicays coloured. 



Fomes fomentarius. Fr. 



Iloof-shaped, 4-7 in. across, 3-5 in. thick at tho base ; 

 pileus distantly concentrically sulcate, glabious, opaque, 

 fuliginous, or dingy brown, cuticle thick, hard, persistent, 

 margin at first with a white bloom, then ferruginous ; flesh 

 rather soft, compactly floccose, foxy rust-colour ; tubes very 

 long, J,-2 in. or more, distinctly stratosc, ferruginous, pores 

 subangular, about \ mm. across, powdered with white at 

 first then ferruginous ; spores brown, elliptical, base abruptly 

 truncate, 6x3* 5— i /jl. 



Foh/porus fomentarius, Fries, Syst. Myc. i. p. 374; Stev., 

 Brit. Fung., p. 204. 



Plane below, tapering towards the margin all round from 

 the very thick base, hence more or less triangular in section. 



Sometimes when old, especially when growing on birch, 

 nearly white, occasionally tinged with bright yellow, 

 (P.evk.) 



In the young plant the upper surface of the pileus is 

 brown, with a thick rounded Avhite edge. Pores varying 

 from white to brown. It throws off most copiously, from 

 everjr part of its surface, a powder of the colour of Spanish 

 snuff; this alone will distinguish it from every other species. 

 It is also an annual; Poli/jwrus igniarius, on the contrary, is 

 a perennial. (Purton.) 



Large, externally hard, with grey or blackish zones, 

 especially near tho margin. I'ores stratose, forming long, 

 very slender tubes, naked. Substance spongy, foxy, good 

 for making tinder. (Fries.) 



Pileus large, 3-8 in. in diameter, externally hard, some- 

 what banded, particularly towards the margin, with grey 

 and dark zones, strongly resembling a horse's hoof, some- 

 times much flattened. I'ores stratified, or in a succession of 

 layers, long, very slender, naked ; substance reddish-brown 

 and spongy. (Grev.) 



