214 FUNGUS-FLORA. 



With the habit and general appearance of Polystictus versi- 

 color, but quite distinct ; pores about ^ mm, across. 



Often imbricated and continuously effused behind. Dis- 

 tinguished from P. velutinus by the coarsely strigose pileus 

 and the different spores. 



Both surfaces almost plane, reniform, often imbricated, 

 about 2 in. long, 1^ in. broad, zones coloured like the pileus. 

 Substance tough, soft. Pores of medium size, equal, be- 

 coming grey; sometimes yellow, but always internally 

 white. (Fries.) 



Polystictus velutinus. Fr. 



Horizontal, laterally attached, thin, corky-coriaceous then 

 rigid ; pileus velvety, indistinctly zoned, white, becoming 

 yellowish, margin straight, acute ; plane on both surfaces ; 

 pores short, subangular, white, dissepiments thin; spores 

 broadly elliptic-oblong, obliquely apiculate, 5 x 4 p.. 



Polyporus velutinus, Fries, Syst. Myc. i. p. 368; Berk., 

 Outl. Fung., p. 248. 



On trunks, stumps, &c. Sometimes imbricated, 1-3 in. 

 across, about in. thick. Moist when young, then becoming 

 hard; pileus not shining, as in Polystictus versicolor, from 

 which it is also distinguished by the whitish colour. Pores 

 about three in 1 mm. 



More or less imbricated. Pileus 23 in. broad, velvety, 

 undulated, obscurely zoned, between corky and leathery, 

 margin thinner than in the following species ( = Polystictus 

 versicolor), shrinking and curling inwards when dried ; 

 colours various, whitish with a cottony margin, yellowish- 

 fuscous, or brownish-grey ; the latter is most common. 

 Pores whitish or yellowish, minute, round, very short, often 

 disappearing near the margin. (Grev.) 



Pileus convex when young, then depressed, thin, white or 

 pale yellowish, about 2 in. across. Pores small, equal, dingy, 

 white or yellowish. (Fries.) 



Polystictus gossypinus. Lev. 



White. Pileus 14 in. across, coriaceous, effuso-reflexed, 

 flattened, thin, tomentose, zoneless ; flesh thin, white ; tubes 

 1-2 lines or more long, pores labyrinthiform, then angular, 

 rather large, greyish, dissepiments thin, more or less torn. 



