252 FUNGUS-FLOEA. 



moist, shining-white when dry. Smell rather acid. Without 

 a distinct cuticle. Pores about ^- mm. across. Distinguished 

 amongst the soft white species of Polyporw by the absence 

 of blue or rusty stains when bruised. 



Allied to Polyporus spumeus. Flesh soft, watery, slightly 

 acid, taste astringent. Pileus rather thin, 1 in. and more 

 across, zoneless, (pubescent when young?), margin thin, 

 acute, sometimes with a short lateral stem. Pores round, 

 at length convex. White, watery-white when moist. 

 (Fries.) 



Polyporus cerebrinus. B. & Br. 



Eesupinate, pulvinate, about 1 in; across, ^ in. or more 

 thick ; snow-white, very minutely tomentose, margin crenu- 

 late ; pores rounded, rather large, dissepiments thick, entire ; 

 spores subfusiform, colourless, 5 x 2 • 5 /x. 



Polyporus cerebrinus, B. & Br., Ann. Nat. Hist., n. 1800; 

 Stev., Brit. Fung., p. 197. 



On fir. Looks like a portion of white brain ; pores average 

 about ^ mm. across. 



Polyporus caesius. Fr. 



Resupinate . or dimidiate, 1-3 in. across, fleshy, irregular, 

 soft and tough, silky, white, here and there tinged with 

 blue ; pores minute, unequal, elongated, flexuous, dissepi- 

 ments thin, torn into irregular teeth ; spores elliptical, 

 14 X 3 ^. 



Polyporus caesius, Fries, Syst. Myc. i. p. 360 ; Stev., Brit. 

 Fung., p. 198. 



On dead trunks, especially pine. 



A small species ^3 in. broad, imbricated and laciniated, 

 sometimes stipitate, very delicate, changing when touched 

 to bluish; flesh thin; pores of various lengths, sometimes 

 oblique, and deeper than the flesh of the pileus. (Berk.) 



Pores ^J mm. diameter. 



Pileus ^3 in. broad, reflexed, sometimes imbricated, 

 white at first, at length glaucous or bluish, soft and easily 

 injured, but when old rather tough, and at length dry and 

 hard. Pores small, white, irregular, often oblique, lacerat- 

 ing, of various lengths. Flesh tender, and turning bluish 

 when injured, as does also the surface of the pileup. 

 (Grev.) : 



