248 pungtjs-floeA. 



Var. undulatus. Fr., broadly expanded, marginate, pale 

 bay-brown, 



** F ileus white, pale ochraceous, yellowish, &c. 



Eolx]oorusbetiilinus. Pr. 



Pileus thick , corky, elastic, hoof-ahaped, obliquely um- 

 bonate behind, and forming: the point of attachment, margin 

 obtuse, incurved, sterile below, pileus covered with a thin 

 crust that eventually breaks away, whitish, z oneless, glabrous ; 

 pores up to \ in. deep, inisLiite, unequal, whitish; spores 

 white. 



Polyporus letulinus, Pries, Syst. Myc. i. p. 358 ; Greville, 

 Scot. Cr. ri., t. 246. 



QsJESBk?i2£Mrphi &c. Distinguished by the white, corky, 

 very fleshy pileus having the margin incurved, _3r§-is^_S:2I2§.§' 

 flesh white, soft, very thick behind, horizontally attached by 

 the posterior, oblique umbo, Pores very;^ minute, about 

 1 mm, 



Pileus 4-6 in. across, smooth, pale reddish-brown when 

 mature, often mottled, roundish or sometimes renifomu 

 Flesh white, very thick ; pores white or tinged with brown , 

 narrow, the orifififis_t.Qathed, separable from the pileus when 

 fresh, but really concrete with it. (Grev.) 



Taste and smell acid. The epidermis is very thin and 

 delicate, and easily peels off; when dry the whole plant is 

 very light ; its texture between coriaceous and corky. 

 (Berk.) 



Polyporus borealis. Fr. 



Horizontal, subspathulate or reniform, either attenuated 

 behind into a short, more or less distinct stem, or thick and 

 sessile, 2-3 in. across, whitish then dingy yellow, spongy 

 then corky, compact, hairy, flesh thick, composed of parallel 

 fibres, whitish ; tubes 2-3 lines long, pores unequal, flexuous, 

 dissepiments thin, torn, white ; spores colourless, subglobose, 

 4 /i diameter. 



Polyporus horealis. Fries, Syst. Myc. i. p. 366 ;. Stev., Brit. 

 Fung., p. 202. 



On stumps and trunks of pine, &c. Pileus often radiate- 

 rugose, rigid and more or less incurved when dry. "When a 

 stem is present the tubes are more or less decurrent. 



