Daedalea quercina (L.) Pers. 1801

Daedalea quercina (I^.) Pers. Syn. 500. 1801
Agarictis' querdinus I^, Sp. PI. 1176. 1753.
Agaricus labyrinthiformis Bull. Herb. Fr. pi. 352. YI^I .
Polyporus latissimus Fries, Obs. Myc. 1 : 128. 1815.
Daedalea quercina nigricans Fries, Syst. Myc. 1 : 333. 1821.
1 Daedalea plumbea L^v. Ann. Sci. Nat. III. 5 : 302. 1846. (Type from New York.)
? Trametes kansensis Cragin, Bull. Washburn I^ab. Nat. Hist. 1 ; 24, 1884. (Type from Kansas.)
'Pileus corky, rigid, dimidiate, sessile, imbricate, applanate, convex below, triangular in section, 6-12X9-20X2-4 cm.; surface isabelline-avellaneous to cinereous or smokyblack with age, slightly sulcate, zonate at times, tuberculose to colliculose in the older portions; margin usually thin, pallid, glabrous: context isabelline, soft-corky, homogeneous, 5-7 mm. thick ; tubes labyrinthiform, becoming nearly lamellate with age in some specimens, 1-2 cm. long, 1-2 mm. broad, chalk-white or discolored within, edges obtuse, entire, ochraceous to avellaneous.
Type locality : France.
Habitat : Stumps, trunks and timbers of oak and chestnut.
Distribution : Temperate North America ; also in Europe.