218 FUNGUS-FLORA. 



same colour and shining appearance as the pileus. I have 

 had no opportunity of tracing the growth of this fungus, 

 hut Mr. Purton informs us, that the lacquered appearance is 

 occasioned by a thick, glutinous, reddish juice, which exudes 

 from every part of the pileus and stipes, and soon dries. 

 (Grev.) 



II. Arus. 



Sessile, dimidiate or effuso-reflexed. 

 * Pileus whitisJi. 



Fomes ulmarius. Fr. 



Pileus white, effused, sometimes with an obtuse free 

 margin, corky, then woody and hard, cuticle crustaceous, 

 tuberculose, smooth ; flesh white ; tubes stratose, whitish, 

 pores minute, rounded, yellowish or at first ta^nay, spores 

 elliptical, 7-8 X 4 /x. 



Pohjpurus uhnarius, Fries, Syst. Myc. i. p. 3G5 ; Berk., 

 Engl. Fl., vol. V. p. 142 ; Cooke, Hdbk,, p. 27G. 



On old elm trunks. 



Effused, with an obtuse, occasionally free margin, forming 

 a new stratum every year, so that a section gives several 

 distinct layers of pores and flesh, alternating with each 

 otlier ; flesh white ; pores minutely tawny ; substance when 

 dry, hard and corky. (Berk.) 



Pileus 4r-10 in. across, often yellowish with age. Tubes 

 i-| in. long when old and stratifled; pores about ] mm. 

 across. 



Fomes populinus. Fr. 



White, pileus between corky and woody, rigid, zoneless, 

 villose, margin obtuse ; white within ; pores minute, short, 

 rounded. 



Pohjporus jxijiiiliiiHS, Fries, Syst. Myc. i. p. 367; Fries, 

 llym. Eur., ]). .^><)4. 



On white poplar. 



Iml)ricatcd, grown together at the dccurrent base, trans- 

 versely dilatfd. J have the same on black ])oplar nearly 

 solitary, pileus at first floccoso-mealy, very hard and woody 

 when old. Both are white within, not stratose. (Fries.) 



