1914] 
OVERHOLTS—THE POLYPORACE OF OHIO 101 
white or yellowish, distinetly duplex, firm and fibrous below, 
soft and floccose above, 0.5-2 em. thick; tubes 3-10 mm. long, 
the mouths white or yellowish, angular to irregular and uneven, 
rather large, averaging 2-3 to а mm.; spores (teste Murrill) 
ovoid, smooth, hyaline, 5-6 x 3-4 и. 
Growing only on trunks of coniferous trees. Rare. 
The species is most easily separated from its allies by the 
size and habitat. For illustrations see Atkinson, Mushrooms 
f. 9., Duggar, Fung. Dis. Plants f. 228., and Atkinson, Cornell 
Univ. Agr. Exp. Sta. Bul. 193: f. 63. 
20. P. Spraguei Berk. & Curt. Grevillea 1: 50. 1872. 
Plants annual, sessile or decurrent, sometimes imbricate; 
pileus dimidiate, 4-12 x 4-10 x 0.6-2 cm., fleshy-tough when 
fresh, rigid when dry, white or cinereous, appressed-tomentose 
or glabrous, azonate or somewhat zonate, margin thin or rather 
thick, acute, often blackening on drying; context white, watery, 
tough-fibrous when fresh, sometimes very hard when dry, zonate, 
0.3-1.5 em. thick, with a disagreeable odor in fresh specimens; 
tubes 0.3-1 em. long, mouths white or discolored, circular or 
angular, averaging 3—4 to a mm. ; spores (teste Murrill) ellipsoidal 
smooth, hyaline, бх 4 и. 
On dead wood of deciduous trees, especially on Fagus, Quer- 
cus, and Castanea. July to September. Common. 
Fresh specimens are always easily distinguished by the very 
disagreeable odor. Dried plants are characteristically very 
hard and rigid, the context almost bony in texture. 
21. P. zonalis Berk. Ann. & Mag. Nat. Hist. I. то: 375. 
1842. 
Plants annual, sessile, effused-reflexed, or entirely resupinate; 
pileus dimidiate or laterally confluent, 0-2.5 x 1-5 x 0.2-0.5 
cm., fleshy and pliable when fresh, rigid and firm when dry, 
whitish to flesh-colored or isabelline, finely tomentose to gla- 
brous, at first azonate but becoming zoned when mature, the 
margin at first thick, thin with age; context white, fibrous when 
fresh, hard and rigid when dry, 1-2 mm. thick; tubes 1-3 mm. 
long, the mouths usually more or less flesh-tinted when fresh, 
angular, averaging 4-5 to a mm., the walls thick and entire, 
very firm and rigid on drying; spores white, smooth, globose, 
2.5-5 u broad, with one large nucleus. 
