282 POLYPOREI. 



806. Polyporous medulla-panis. Fr. " Crumb of Bread 



Polyporus. 



Effused, determinate, sub-undulate, firm, smooth, white, cir- 

 cumference naked, sub-marginate, wholly composed of middle- 

 si^ed, rather long, entire pores. — Fr. Epicr.p. 485. Sow, t. 387, 

 /. 7. Jacq. Misc. i.t.ll. Fl. Ban. t. 2028,/. 1. Letell. t. 690, /. 

 1. Bolt.t. lG6,/.2? Enr/.Fl.Y.p.Ue. Fckl. exs.no. U6^. 



On decaying wood. [United States.] 



EfFased, white, becoming yellowish in age, roundish, tolerably defined, 

 dry, thickish, following in some degree the inequalities of the wood. Pores 

 elongated, roundish, straight, or oblique, according to situation. Flesh al- 

 most none. — Grev. 



807. Polyporus vitreus. F?'. " Glassy Polyporus." 



Effused, sub -undulated, indeterminate, whitish, subhyaline, 

 mycelium thin, separable, matted together ; pores very small, 

 round, long, obtuse, entire. — Fr.Fpicr. p. 4:S6. Ann. N.H. no. 351. 



On decayed wood. Rare. 



Distinguished by its distinct xylostromatoid sub-stratum, which separates 

 easily from the matrix. — B. (tBr. 



808. Polyporus obducens. Fr. " Incrusting Polyporus." 



Effused, incrusting, innate, firm, white, wholly composed of 

 very small, crowded, equal pores, distinctly stratose, annual strata 

 pallid tan colour. — F?\ Epicr.p. 485. Ann.N. H. no. 352. Bisch. 

 f. 3294. 



On rotten trunks. Bristol. 



This species forms thick strata consisting of several layers, the growth of 

 as many years. — B. <b Br. 



809. Polyporus vulgaris. Fr, " Common-effused Polyporus." 



Broadly effused, thin, dry, closely adnate, even, white, circum- 

 ference soon smooth, wholly composed of firm, crowded, small, 

 round, nearly equal pores. — Fr. Epicr. p. 485. BerJc. Outl. 1. 16, 

 /. 6. Eng. Fl. Y.p. 146. Fl. exs. no. 619. Fckl. exs. no. 1366. 



On dead wood and fallen branches. [United States.] 



Effused, sometimes to the breadth of one foot, smooth, not a line thick, 

 nor to be separated from the wood without destroying it ; margin when young 

 very slightly pubescent. Pores straight or oblique, roundish. — M. J.E. 



