200 FUNGUS-FLORA. 



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

 p. 217. 



Ou rotten wood, esjieciall}^ fir. Sliining, 2 lines thick or 

 more ; recognised L}- the rather thick clastic flesh below the 

 pores, which separates readily from the matrix. Pores about 

 I mm. diameter. 



Distinguished by its distinct xylostromatoid substratum, 

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



Poria Hibernica. B. & Br. 



Apjiearing as Binall, orbicular spots which soon become 

 confluent and form broadly extended white patches, adnata, 

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

 byssoid; jiores very short, dissepiments thin, Arm, acute, 

 almost entire, openings small, polygonal ; spores elliptical, 

 5 X S IX. 



JPoljiporus (resupinatus) Hihernicus, Berk, and Broome, 

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



On decorticated pine. Distinguished from Porta 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 

 \—\ nmi. across. 



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



Eftused fur 1-2 in., very thin and meuibranaceous but 

 separable from the matrix, i)crsistently white ; margin 

 shortly fimbriate ; poi'cs minute, unequal, angular, dis- 

 sepiments very thin, minutely toothed at the margin. 



Pohiporiis Gonhiiiii'uNis, ]5crk. & Broome, Ann. Nat. Hist., 

 n. 1028; Stev., Brit. Fung., p. 210. 



On fir poles. 



An extremely delicate s[)ecies, 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 l)y tlio toi-n margins of the dissepiments, and 

 in being separable from the matrix. 



