200 FUNGUS-FLOKA. 



Polyporus vitreus, Pers., Obs. i. p. 15 ; Stev., Brit. Fung., 

 p. 217. 



On rotten wood, especially fir. Shining, 2 lines thick or 

 more ; recognised by the rather thick elastic flesh below the 

 pores, which separates readily from the matrix. Pores about 

 mm. diameter. 



Distinguished by its distinct xylostromatoid substratum, 

 which separates easily from the matrix. (B. & Br.) 



Poria Hibernica. B. & Br. 



Appearing as email, orbicular spots which soon become 

 confluent and form broadly extended white patches, adnate, 

 inseparable, white, margin narrow, very thin, radiato- 

 byssoid; pores very short, dissepiments thin, firm, acute, 

 almost entire, openings small, polygonal ; spores elliptical, 

 5 X 3 p.. 



Polyporus (resupinatus') Hibernicus, Berk, and Broome, 

 Ann. Nat. Hist., n. 1291 ; Fries, Hym. Eur., p. 579. 



On decorticated pine. Distinguished from Poria Gor- 

 doniensis by being inseparable, and from P. radula and P. 

 vaporaria by the size of the spores, also by the smaller 

 and more regularly angular openings of the pores, and by 

 the thin, firm, usually entire and acute dissepiments. Pores 

 ^ ^ mm. across. 



Poria Gordoniensis. B. & Br. (fig. 21, p. 184.) 



Effused for 12 in., very thin and membranaceous but 

 separable from the matrix, persistently white ; margin 

 shortly fimbriate; pores minute, unequal, angular, dis- 

 sepiments very thin, minutely toothed at the margin. 



Polyporus Gordoniensis, Berk. & Broome, Ann. Nat. Hist., 

 n. 1023; Stev., Brit. Fung., p. 219. 



On fir poles. 



An extremely delicate species, but not in the slightest 

 degree innate. The margin remains snow-white, and the 

 pores themselves change colour only very slightly in drying. 

 (B. & Br.) 



Forming patches 1 in. across or more ; pores 3 to 4 in the 

 space of 1 mm. Superficially resembling P. hibernica, but 

 distinguished by the torn margins of the dissepiments, and 

 in being separable from the matrix. 



