1914) 
OVERHOLTS—THE POLYPORACE/E OF OHIO 137 
illustrations see Kellerman, Journ. Myc. 9: pl. 3., and White, 
Hymen. Conn. pl. 35. f. 2. 
16. Е. applanatus Pers. ex Wallr. Crypt. Fl. Ger. 2: 591. 
1833. 
Boletus applanatus Pers. Obs. Myc. 2: 2. 1799. Polyporus 
applanatus Fries, Epicr. Syst. Мус. 465. 1838. Р. leucopheus 
Mont. Syll. Crypt. 157. 1856. 
Plants perennial, sessile; pileus dimidiate, convex or plane, 
not ungulate, 3-30 x 5-50 x 1.5-7 ст., woody, usually grayish 
becoming brownish or blackish, glabrous, covered with a thick 
horny crust, zonate or concentrically sulcate, margin thin or 
thick, acute or obtuse; context dark ferruginous brown, floccose : 
to soft corky, 0.6-2 cm. or more thick; tubes 0.5-1.5 cm. long, 
distinctly stratified after the first season, the strata separated 
by thin layers of context, mouths whitish to umber, darker 
when bruised, circular, minute, averaging 5-6 to a mm. 
On dead wood of deciduous trees or on living trees. Common. 
This is our most common species of Fomes and may be found 
in every woodlot, usually on stumps or old logs. It is dis- 
tinguished from F. fomentarius L. ex Gill. by the more applanate 
pileus and the minute mouths of the tubes. For illustrations 
see Atkinson, Mushrooms f. 15., White, Hymen. Conn. pl. 
35. f. 1., and Atkinson, Cornell Univ. Agr. Exp. Sta. Bul. 193: 
f. 82. 
17. F. lobatus Schw. ex Cooke, Grevillea 14:18. 1885. 
Polyporus lobatus Schw. 'Trans. Am. Phil. Soc. II. 4:157. 1832. 
P. reniformis Morgan, Journ. Cin. Soc. Nat. Hist. 8:105. 1885. 
Plants annual, frequently reviving for two or three years 
but the second year's growth distinct from and coming out 
below that of the first year, sessile or more often appearing 
substipitate; pileus dimidiate or reniform, plane, depressed, or 
somewhat convex, never ungulate, 4-12 x 4-15 x 1-3 cm., 
corky or somewhat flexible when growing, usually umber to 
yellowish or dark rusty brown, glabrous, covered with a thin, 
easily indented crust, zonate or concentrically sulcate, margin 
thin and acute; context dark rusty brown, soft and floccose to 
punky, 0.3-1 cm. thick; tubes 0.4-1 cm. long, not stratified, 
mouths circular or subcircular, white, yellowish or umber- 
