Bjerkandera adusta (Willd.) P. Karst. 1879

Bjerkandera adusta (Wilid.) Karst. Medd. Soc. Faun
Fl. Fenn. 5: 38. 1879.
Boletus adustus Willd. Fl. Berol. 392. 1787. Boletus fuscoporus Planer, Ind. PI. Erf. 26. 1788. Boletus suberosus Batsch, Blench. Fung. pi. 226. 1789. Boletus pelleporus Bull. Herb. Fr. pi. 501, f. 2. 1790. Boletus carpineus Sow. Engl. Fungi ^/. 231. 1799. Boletus adustus crispus Pers. Obs. Myc. 2 ; 8. 1799. Polyporus crispus Fries, Obs. Myc. 1 : 127. 1815. Polyporus adustus Fries, Syst. Myc. 1 : Z^?i. 1821. Polyporus pallescens Fries, Syst. Myc. 1 : 369. 1821.
Boletus isabellinus Schw. Schr. Nat. Ges. Leipzig 1 : 96. 1822. (Type from North Carolina ) Polyporus subcinereus Berk. Ann. Mag. Nat. Hist. 3 : 391. 1839. (Type from boreal North America. )
Polyporus Halesiae Berk. & Curt. Ann. Mag. Nat. Hist. II. 12 : 434. 1853.— Grevillea 1 : 52. 1872.
(Type from Georgia, on Halesia.) Polyporus Lindheimeri Berk. & Curt. Grevillea 1 : 50. 1872. (Type from Texas.) Myriadoporus adustus Peck, Bull. Torrey Club 11 : 27. 1884. Polyporus B^irtii Peck, Bull. Torrey Club 24 : 146. 1897. (Type from Vermont, on birch wood.)
Pileus cespitose-imbricate, decurrent, sometimes effused, conchate, fleshy-tough or corky, somewhat flexible when dry, 2-4X4-8X0.2-0.4 cm.; surface undulate, indistinctly zonate, especially near the margin, finely tomentose or villose, isabelline with ^lightly darker markings; margin thin, undulate, sterile, pallid, usually becoming black as thougli scorched: context fibrous-corky, white, 1-3.5 mm. thick; tubes short, 1 mm. or less, smoky-white to blackish within, mouths regular, angular, 5-6 to a mm., smoke-colored and pruinose when young, soon becoming grayish-black, edges thin, entire : spores ellipsoid-allantoid , smooth, hyaline, 3-5X1-5-2.5^.
Type locality : Germany.
Habitat : Dead deciduous wood.
Distribution : Cosmopolitan.