Trichaptum biforme (Fr.) Ryvarden 1972

Coriolus prolificans (Fries) Murrill
Polyporus prolificans Fries, Epicr. Myc. 443. 1838.
Polyporus laceratus Berk. Ann. Mag. Nat. Hist. 3: 392. 1839. (Type from I^ouisiana.) Polyporus Flabellum Mont. PI. Cell. Cuba 388. pi. 15. f. 2. 1842. (Type from Cuba.) Polyporus Menandianus Mont. Ann. Sci. Nat. II. 20 : 362. 1843. (Type from New York.) Polyporus subflavus I^€v. Ann. Sci. Nat. Ill, 5 : 300. 1846. (Type from New York.) Polypoftis xalapensis Bepk. Jour. Bot. & Kew Misc. 1 : 103. 1849. (Type from Mexico.) Polyporus Sartwellii Berk. & Curt. Grevillea 1 : 51. 1872. (Type from New York.) Polyporus ilictncola Berk. & Curt. Grevillea 1 : 52. 1872. (Type from Alabama.) Polyporus pseudopargamenus "Dixim.. Myc. Univ. no. 1102. 1878. (Type from New York.)
Pileus exceedingly variable, sessile or affixed by a short tubercle, dimidiate to flabelliform, broadly or narrowly attached, 2-5X2-6X0.1-0.3 cm. ; surface finely villose-tomentose, smooth, white or slightly yellowish, marked with a few narrow indistinct latericeous or bay zones ; margin thin, sterile, entire to lobed : context very thin, white, fibrous ; tubes 1-3 mm. long, white to discolored within, mouths angular, somewhat irregular, 3-4 to a mm., usually becoming irpiciform at an early stage, edges acute, dentate, becoming lacerate, white to yellowish or umbrinous : spores smooth, hyaline.
Type locality : Mexico.
Habitat : Dead deciduous trunks.
Distribution : Canada to Florida and west to Wisconsin and Mexico ; also in Europe.

Coriolus biformis (Klotzsch) Pat. Tax. Hymen. 94. 1900
1 Boletus cervinus Schw. Schr. Nat. Ges. Leipzig 1 : 96. 1822. (Type from North Carolina.)
Polyporus bifoi'mis Klotzsch, Linnaea 8 : 486. 1833.
Polyporus molliuscuhis Berk. Lond. Jour. Bot. 6^: 320. 1847. (Type from Ohio.)
Polyporus carolinensis Berk. Jour. Bot. & Kew Misc. 1 : 102. 1849. (Type from South Carolina.)
Polyporus chariaceus Berlc. Jour. Bot. & Kew Misc. 1 : 103. 1849.— Grevillea 1 : bl>. 1872. (Type
from North Carolina.) Polyporus scurrosus B. & C. Grevillea 1 : ,52. 1872. (Type from North Carolina.)
Pileus effused-reflexed, imbricate, laterally connate, the reflex^d portion dimidiate, conchate, 2-5X5-12X0.3-0.7 cm. ; surface white, obscurely zonate, nearly smooth, somewhat silky, fibrillose-tomentose ; margin acute or obtuse, undulate to lobed : context softcorky, white, 1-2 mm. thick ; tubes 3-5 mm. long, white to discolored within , mouths large and irregular, variable in size, averaging 2 to a mm., edges thin, lacerate-dentate, white to discolored or light-bay: spores oblong, slightly curved, smooth, hyaline, 7-9X2.5-3/^ ;
hyphae 4/^ ; cystidia none.
Type locality : Boreal North America. Habitat : Dead deciduous wood of various kinds. DiSTRiBiTTiON : Canada to Florida and west to Iowa and Kansas.