202 POLYPOREI. 



Poiyporus. 50. P. cuticularis Fr. Pileus ferruginous - fuscous then 

 blackish, thin, spongy -fleshy, then juiceless, becoming plane, 

 hairy, tomentose, internally laxly composed of parallel fibres, 

 margin fibroso-fimbriate, incurved. Pores minute, long, pallid 

 then ferruginous. 



Allied to P. hispidus, but much thinner, soft, the pores longer than the 

 depth of the flesh. Spores plentiful, ochraceous. 



On trunks. Burnham Beeches. 



Name cuticula, a thin external skin. Fr. Hym. Eur. p. 551. B. 6 Br. 

 n. 1137. C. Hbk, n. jbg.Bull. t. 462. 



** Substance and spores white. 



51. P. spumeus Fr. Whitish. Pileus 7.5 cent. (3 in.) broad, 

 fleshy-spongy, compact, pulvinate, gibbous, rugoso-hispid, with 

 a stem-like base, margin incurved ; flesh zoned towards the 

 margin. Pores separating, minute, round, acute, entire. 



A very distinguished species. 



On trunks and stumps. Rare. July. 



Oozing out from the tree in a very soft mass. M.J.B. Name spuma, 

 froth. Fr. Hym. Eur. p. 552. Syst. Myc. i. p. 358. Berk. Out. p. 244. /. 

 i6./. 4. C. Hbk. n. 770. S. Mycol. Scot. n. 727. Sow. t. 211. 



52. P. borealis Fr. White then yellowish, 5 cent. (2 in.) and 

 more broad and thick. Pileus spongy then corky, compact, 

 somewhat pulvinate, hairy, internally composed of parallel fibres, 

 margin spreading. Pores adnate, unequal, sinuoso-flexuous and 

 torn, white. 



It is exceedingly distinct from those nearest to it ; fleshy indeed when young, 

 but when full grown corky. Otherwise it is very variable ; the following are 

 to be noted. B. montanus pileus fleshy, thick, hairy, margin obtuse ; pores 

 obtuse, entire. C. spathulatus pileus thin, villous, margin acute, extended 

 into a short lateral stem ; pores thin, very much torn. 



On stumps. Slough. Balnamoon, Forfarsh. Strachan, Kin- 

 cardinesh. 



Name borealis, northern. Fr. Hym. Eur. p. 552. Syst. Myc. \. p. 366. 

 B. & Br. n. 1429. S. Mycol. Scot. n. 728. Rosik. 4. t. 40. $>ch(zff. t. 314 

 (bad). 



B. Placodermei. Pileus clothed with a continuous crust, &c. 



4. Suberosi. Pileus at the first somewhat fleshy and juicy, &c. 



* Substance coloured. 



53. P. dryadeus Fr. Pileus somewhat ferruginous, becoming 

 fuscous, fleshy then corky, thick, pulvinate, cuticle thin, soft, 



