240 FUNGUS-FLORA. 



attenuated downwards, white, then rufescent; pores very 

 shallow, irrregularly sinuous, dissepiments toothed at the 

 edge, more or less decurrent, whitish, then rufescent ; spores 

 subglobose, 4 x 3 /JL, almost colourless. 



Polyporm acanthoides, Fries, Epicr., p. 448; Stev., Brit. 

 Fung., p. 195. 



Boletus acanthoides, Bull., t. 486. 



On trunks, also on roots and buried wood. Pores irregular, 

 ^-1 mm. in length. Forming large clusters, said by Bulliard 

 to sometimes extend for 2-3 ft. Somewhat resembling Poly- 

 phorus giganteus, but thinner and pale when young, rigid and 

 fragile when old. P. rufescens is distinguished by the 

 spongy substance and hairy pileus. 



Polyporus sulphureus. Fr. 



Horizontal, attached by a broad base, usually very much 

 imbricated; pileus undulate, almost glabrous, pale flesh- 

 colour with a yellow tinge, flesh thick, yellow, then white, 

 of a cheesy consistency; pores up to ^ in. long, minute, 

 plane, sulphur-yellow; spores elliptical, hyaline, slightly 

 papillose, 7-8 x 4-5 /*. 



Polyphorus sulphureus, Fr., Syst. Myc. i. p. 357 ; Berk., 

 Outl., t. 16, f. 3. 



On trunks. Commonly sessile, but sometimes stipitate 

 forms occur, tufted and imbricate, pilei 6-12 in. across, 

 sometimes much larger. Flesh yellow, becoming white, of 

 a cheese-like consistency, not becoming hard. Whole fungus 

 brittle and with a disagreeable smell. Dry specimens are 

 often more or less incrusted with a deposit of crystals of 

 binoxalate of potash. 



Plant very polymorphous in its shape, and unequal in 

 size, composed of a number of mostly imbricated pilei, more 

 or less grown together, so as to form one mass, from which 

 the rounded and lobed margins of the pilei project in a tiled 

 manner, or shoot out into various excrescences, or even some- 

 what cylindrical, simple or divided branches; the whole 

 sometimes attaining two or three feet in breadth. Colour 

 yellowish, orange, red, or a bright union of these hues, 

 fading in age, the pores always of a fine sulphur tint. 

 Flesh thick, white. Pores very numerous, minute, roundish, 

 readily produced on any part of the fungus, according to 



