252 FUNGUS-FLORA. 



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

 a distinct ciiticle. Pores about .\ mm. across. Distinguished 

 amongst the soft white species of Pohjporus by the absence 

 of blue or rusty stains when bruised. 



Allied to Folyporus 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. 



Pohjporus cerehrinus, 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. 



Eesupinate or diuudiate, 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 /x. 



Polyporus caesius, Fries, Syst. Myc. i. p. 3(50 ; Stev., Brit, 

 Fung., p. 198, 



On dead trunks, et-pecially pine, 



A small species i-3 in. broad, imbricated and laciniated, 

 sometimes .^^tipitate, very delicate, changing wlien touched 

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

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



Pores ^3- 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 obli([ne, lacerat- 

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

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

 (Grev.) 



