1914) 
OVERHOLTS—THE POLYPORACEJE OF OHIO 117 
On old logs and stumps in October and November. Common. 
Distinguished by the brown pileus and the light brown, 
almost whitish context. For illustration see Hard, Mush- 
rooms f. 881. 
47. P. nidulans Fries, Syst. Myc. 1:362. 1821. 
Plants sessile or effused-reflexed; pileus dimidiate, 1.5-6 x 
2-8 x 0.5-2 cm., very soft, spongy, and full of water when 
fresh, firm and friable when dry, umber to cinnamon or tawny 
brown, finely villous-tomentose to glabrous, azonate, margin 
thin and acute, purplish or reddish where bruised; context con- 
colorous with the pileus, sometimes with a darker layer next 
to the hymenium, soft and watery when fresh, cheesy and 
friable when dry, 2-8 mm. thick; tubes 2-7 mm. long, mouths 
hoary when young, yellowish or reddish brown when mature, 
angular or sinuous, averaging 3-4 to a mm.; spores white, 
smooth, globose ог subglobose, 2-3.5 шіп diameter. 
On dead wood of deciduous trees, especially Quercus. June 
to September. Not common. 
Distinguished by the uniform umber brown color of the 
whole plant, the soft and watery context, etc. 
48. P. gilvus Schw. ex Fries, Elench. Fung. 1: 104. 1828. 
Boletus gilvus Schw. Syn. Fung. Car. 96. 1822. 
Plants annual or reviving for two or three years, sessile or 
effused-reflexed, often imbricate; pileus dimidiate, 1-7 x 2-12 x 
0.2-2 ста., leathery or corky when fresh, woody and rigid when 
dry, yellowish brown or reddish brown, in very young stages 
covered by a purplish, villous pubescence, otherwise glabrous, 
usually rough, more or less zonate, margin thin and acute; 
context yellowish brown, soft-corky to woody, 0.1-1.3 cm. 
thick; tubes 1-5 mm. long, the mouths reddish brown or darker, 
circular, then angular, averaging 6-8 to а mm., the walls rather 
thick and entire; spores white, smooth, oblong-ellipsoid, 3-4 
X 5-6 м. 
On dead wood of all kinds. July to December. Common. 
Closely related to P. radiatus Sow. ex Fries and P. cuticularis 
Bull ex Fries, but distinet in the white spores, the lighter 
colored surface and the more woody context. Р. isidiodes 
Sehw. as reported by Lea belongs here. 
