POLYPOBUS. 227 



for the inspection of the naked eye. The length of the tubes 

 is different in the creeping and the turbanated specimens, 

 being shorter in the first, longer in the last variety. 



I gathered specimens of this plant on dry decayed hazel 

 boughs, near Burks Hall, in February, 1790. (Bolton.) 



Fomes ferruginosus. Mass. 



Broadly effused, closely adnate, from ^-1 in. thick, surface 

 either even and nearly plane, nodulose, or with numerous 

 more or less reflexed, imbricated, imperfectly formed pilei, 

 bright ferruginous-brown, becoming dusky ferruginous when 

 old, margin sterile ; pores subrotund, torn, very long ; spores 

 6-7 x 4 JJL; cystidia numerous, acuminate, clear brown, 

 30-40 x 5-6 /*. 



Polyporus ferruginosus, Fries, S. Myc. i. p. 378; Hym. Eur., 

 p. 571 ; Stev., Brit. Fung., p. 212. 



Polyporus cryptorum, Fries, Syst. Myc. i. p. 376. 



Boletus cryptorum, Bull., t. 478. 



On trunks, posts, &c. Often very broadly effused, thick- 

 ness variable, flesh almost obsolete. When growing and at 

 its best, the barren margin is very bright rust colour. Pores 

 3-4 in the space of 1 mm. The bright yellow-brown, spine- 

 like cystidia are very abundant in the hymenium. All the 

 species of Fomes having the hymenium furnished with 

 cystidia have been arranged under a new genus Mucrono- 

 porus by Ellis. 



At first appearing under the form of a confervoid stratum, 

 which gradually thickens and acquires pores in the centre ; 

 generally wholly resupinate, but occasionally slightly 

 reflexed. Pores minute, roundish, unequal ; specimens 

 sometimes occur many inches in length, and in parts % in. 

 thick, from several individuals having become confluent. 

 (Berk.) 



POLYPOKUS. Mich. 



Central or lateral stemmed, dimidiate, &c. Pileus fleshy, 

 tough, rather soft and moist, at length becoming harder 

 (rarely of a cheesy texture and fragile), externally neither 

 sulcate nor zoned, but the internal texture consisting of 



Q 2 



