POLYPORUS. 239 



about 1 line long, sometimes less, whitish, angular, irregular, 

 torn, - mm. across ; spores colourless, subglobose, 5 x 4 p.. 



Polyporus cristatus, Fries, Syst. Myc. i. p. 356 ; Stev., Brit. 

 Fung., p. 194. 



Very variable in form, stem white, usually thick, up to 

 1 in., irregular and more or less branched, and bearing 

 several more or less depressed pilei; sometimes, however, 

 only one is present. Known amongst the branched fragile 

 species furnished with a stem by the greenish colour of the 

 pilous. 



Substance that of Polyporus giganteus. Colour resembling 

 P. sulphureus. Stem lateral, irregular, pruinose, white, at 

 length brown. Pilei rather fleshy, involute, and more or 

 less growing into each other, villoso-pulverulent, 23 in. 

 broad, greenish-yellow. Pores unequal, white, becoming 

 more or less tinged with green when torn. (Fries.) 



Polyporus giganteus. Fr. 



Formed of numerous imbricated pilei, fleshy and tough, 

 then coriaceous, pilei dimidiate, very broad, flaccid, slightly 

 zoned, rivulose, depressed behind, bay-brown; stem much 

 branched, originating from a tuberous base ; pores minute, 

 roundish, at length torn, pallid, becoming darker when 

 bruised. 



Polyporus giganteus, Fries, Syst. Myc. i. p. 356; Cke., 

 Hdbk., p. 268, fig. 65. 



At the base of trunks, &c. 



Forming large tufts 1-2 ft. or more broad, branched in an 

 imbricated manner. (Berk.) 



Pilei sublateral, flaccid, various in form, the surface granu- 

 lated with minute brown flocci, rigid, when dry squamoso- 

 fibrillose ; at first pale, then brownish-yellow ; disc depressed, 

 at length black. Pores minute, dirty brown when bruised, 

 at length torn. I have seen tufts of this species in Sweden 

 4 ft. across. (Fries.) 



Polyporus acanthoides. Fr. 



Imbricated ; pliant when growing, then coriaceous ; pileoli 

 infundibuliform, thin, margin lobed, 25 in. across, flesh 

 2-3 lines thick, ferruginous or pale chestnut, indistinctly 

 zoned, radiately rugulose, smooth ; stems connate-branched, 



