348 POLYPORACE/E Fomes 



a. Fomentarice. Pileus pulvinate, juiceless, not fleshy or spongy, 



floccose, covered with a hard, horny crust. Tubes stratose 

 after the first year. Perennial, lasting for twenty years or 

 more, adding new strata annually. Growing on wood. 



Substance of tubes umber or fuscous. 1576 



Substance of tubes somewhat ferruginous. 1577 — 1585 



Substance white or pallid. 1586 — 1589 



b. Lignosce. Pileus hard, woody, juiceless, covered with a thin, 



somewhat lustrous crust, smooth or becoming so, somewhat 

 effused at the base. Flatter than Fomefitarice or effuso- 

 reflexed. 1590—1594 



a. Fomentariee. 



1576. F. vegetus Karst. (from its vigorous growth, vegetus) a c. 



P. concentrically and radiato-corrugate or rugose, deep olive- 

 slate, dark brown behind ; marg. sometimes brown. T. some- 

 what long, single to 5 -stratose. Po. minute, ivory-brownish, 

 surface brown-white ; marg. barren. Flesh thin, floccoso-lax, 

 yellow-brown or vinous warm-brown. 



Single to 3-imbricate. Trunks, lime, elm ; rare. P. 7§ in. diam. Polyporus 



Stevenii Leveill., according to Bresadola. 



1577. F. applanatus Karst. (from its flattened shape ; piano, to 



level) a b c. 

 P. flattened, tuberculose, vaguely rugged-sulcate-zoned, smooth, 

 cuticle crustaceous, fragile, somewhat shining, cinnamon or 

 brown, becoming greyish with age. T. long, single to 6-stratose, 

 subferruginous. Po. roundish, very minute, white, brownish 

 when bruised. Flesh thick, floccoso-soft, rich brown. 



Sometimes imbricate. Odour acid. Trunks, ash, beech, fir, oak, birch, 

 poplar; uncommon. July-Mar. Diam. I ft. According to Bresadola 

 Polyporus Inzengce Fr. and Polyporus robumcus Fr. are both forms of 

 this. Much softer than 1578. Sometimes weighing 4-5 lbs. 



1578. F. fomentarius Karst. (from its former use as tinder, f omentum) 



a b c. 

 P. hoof-shaped, more or less triangular in section, concentrically 

 rugged-sulcato-zoned, smooth, cuticle thick, hard, yellowish- 

 brown-reddish, fuliginous- or dingy-brown ; marg. paler, at first 

 with a white bloom. T. long, single to 9-stratose, ferruginous. 

 Po. subangular, white, then ferruginous or ivory-brown. Flesh 

 floccoso-soft, oranee-brown. 



Trunks, oak, birch, beech, lime, hornbeam ; common. Jan. -Dec. Diam. 

 8 in. Formerly used as tinder in its soft natural state. Generally 

 destroys exterior of trunk for one quarter of circumference and from base 

 to 20 ft. up. Said by Hartig to cause "white-rot" of beech and oak. 

 Occurs in peat-beds in the eastern counties and in the lake-side pile- 

 dwellings of Switzerland and Italy. Formerly used as a haemostatic. The 

 ashes are used by the Ostiaks and Kamtschatkans as snuff. 



