P0LYP0i:i:i. 289 



internally composed of parallel fibres, margin spreading ; 

 pores adnate, unequal, sinuoso-flexuous and torn, white. 

 — Rostk. 4, t. 40 ; Schceff. t. 314. 



On stumps. Slough, Balnamoon, Forfarshire. Stra- 

 chau, Kincardineshire. 



B. Placodermei.— /'i'Zeif^ clothed with a continuous zoneless or 

 concentricalbj silicate crust ; persistent. 



4. SuBEEOSi. — Pileus fleshy and jiucy, then hard, covered v:ith a 

 somewhat thin crzist; pores slender, at length somewhat sepa- 

 rating ; autumnal^, sometimes lasting till /ollovnng spring 

 but never producing strata. 



* Substance coloured. 



54. P. dryadeus, Fr. (p. 244) ; 3-7 in. Epping Forest. 



** Substance white, not zoned. 



55. P. betulinus, Fr. (p. 214) ; 3-6 in. Epping Forest. 



56. P. quercinus, Fr. (p. 239). 



b. FoMEXTARii. — Pileus JloGcose, juiceless, not fiesliy or spongy, 

 covered with a hard, horny crust ; pores at length stratose ; 

 growing on wood ; someivhat pidvinate ; perennial. 



* Substance umher or fuscous. 



57. P. vegetus, Fr. (p. 245). 



** Substance somewhat Jerraginous. 



58. P. applanatus, Fr. (p. 245). Epping Forest. 



59. P. fomentarius, Fr. (p. 245). Epping Forest. 

 Var. pomaceus, P. The common form on willow ; spores 



dark and ferruginous. 



60. P. nigricans, Fr. (p. 245). 



61. P. igniarius, Fr. (p. 246). Epping Forest. 



T 



