POLYPORUS. 203 



rugged becoming even, smooth ; flesh somewhat zoned, ferrugi- Polypoms. 

 nous. Pores very long, thin, round, soft, ferruginous, paler at 

 the orifice. 



Among the largest and most distinguished, growing rapidly, exuding watery 

 drops at the margin and hence confounded with P. applanatus. 



On old oaks. Frequent. Aug.-Oct. 



Pileus 7.5-17.5 cent. (3-7 in.) or more broad, 6 cent. (2% in.) thick. Smell 

 strong, subacid. M.J.B. Name— Spvs, oak. From its habitat. Fr. Hym. 

 Etir. p. 553. Berk. Out. p. 244. C. Hbk. n. yyi. S. Mycol. Scot. Szipp. 

 Scot. Nat. 1881,/. 37. Hussey i. /. 21. — Pers. Bull. t. 458. 



** Substance, which is not 2oned, and spores white. 



54. P. "betulinus Fr. — Pileus fleshy then corky, hoof-shaped, 

 obtuse, zoneless, smooth, the oblique vertex in the form of an 

 umbo, pellicle thin, separating. Pores late of being developed, 

 curt, minute, unequal, at length separating. 



On living and dead birch. Common. May-Dec. 



Pileus 7.5-15 cent. (3-6 in.) broad. The pileus is at first pale, then acquir- 

 ing a brownish tinge. The edge is always very obtuse. Name — betula, birch. 

 From its habitat. Fr. Hym. Eur. p. 555. Berk. Out. p. 244. C. Hbk. n. 

 772. S. Mycol. Scot. 11. 730. Grev. t. 246. Kostk. t. 22. — Bull. t. 312. 

 Bolt. t. 159. Sow. t. 212. Fl. Da n. t. 1254. 



55. P. quercinus Fr. — Pileus tan-pallid, now and then reddish 

 when touched, thick, corky, texture floccose, soft then hardened, 

 tongue-shaped, convexo-plane, even, at first floccoso-granulated, 

 narrowed beliind into a thick horizontal stem. Pores curt, minute, 

 whitish. 



A remarkable species, analogous with Fistulina. 



On old oak. Rare. 



Name—guercus, oak. From its habitat. Fr. Hym. Eur. p. 555. Berk. 

 Out. p. 239. C. Hbk. ?i. 747. Hussey i. /. $2.—Krombh. t. 5./. 3-5; /. 48. 

 f. 11-14. — Schrad. Spic. p. 157. 



5. Fomentarii. Pileus floccose, of the nature of tinder, &c. 

 * Substance and pores timber orfnscons. 



56. P. vegetus Fr.— Pileus fuscous, dilated, smooth, opaque, 

 concentrically sulcate, the annual zone broad, texture floccose, 

 lax, very thin, cuticle of the second season thick, separable. Pores 

 minute, separating, umber, those of each season distinct on 

 account of an intermediate floccose stratum formed annually. 



It is among the largest, growing rapidly, attaining to 1 ft. in the first year, 



