POLYSTICTUS. 213 



Polystictus radiatus. Fr. 



Pileus corky, coriaceous, rigid, radiato-rugose, at first vel- 

 vety, foxy, then glabrous and rusty-brown, margin spread- 

 ing, wavy; pores minute, pallid, with a silvery sheen, at 

 length rust-coloured. 



Polyporus radiatus, Fries, Syst. Myc. i. p. 369 ; Cke., 

 Hdbk., p. 278. 



Boletus radiatus, Sow., i. 196. 



On alder, hazel, &c. 



Tawny specimens of Polystictus versicolor sometimes occur, 

 very much resembling this species: but it appears from 

 Sowerby's own specimens, as well as the opinion of Fries, to 

 be altogether distinct. (Berk.) 



Imbricated, about 1 in. across, ferruginous, radiating from 

 the base, paler towards the sinuous margin, indistinctly 

 zoned. Pores minute, rounded, white, or dingy yellow. 

 (Fries.) 



Polystictus polymorphus. Kostk. 



Pileus 1 in. and more across, resupinate, effused, coriaceous, 

 margin reflexed, crisped, glabrous, umber ; pores rather 

 large, angular, torn, pallid. 



Polyporus polymorphus, Rostk., 4, t. 56; Stev., Brit. Fung., 

 p. 209. 



On branches, worked wood, &c. The above description is 

 taken from the figure of Eostkovius, in the description the 

 pileus is said to be pale bay. 



*** Pileus whitish, yellowish, or pale-tan. 



Polystictus hirsutus. Fr. 



Pileus between corky and coriaceous, 1-3 in. across, con- 

 vexo-plane, covered with dense hair-like pile, whitish all 

 over, concentrically zoned ; pores roundish, obtuse, white, then 

 brownish ; spores linear-elliptic, 4-5 x 2 p.. 



Polyporus hirsutus, Fr., Syst. Myc. i. p. 367 ; Stev., Brit. 

 Fung., p. 210. 



On trunks. The typical form varies as follows : B. pores 

 entirely white. C. Pores with the opening yellow, pure 

 white within. D. Pores obtuse, angular. E. Margin of the 

 pileus rust-colour. F. Pileus becoming blackish. 



