1914) 
OVERHOLTS—THE POLYPORACEZ OF OHIO 93 
glistening, circular or angular, averaging 3-5 to а mm., the 
dissepiments thin and entire. 
On dead branches of deciduous trees, more often on fruit 
trees. Found from August to December. Not common. 
Separated from P. versicolor L. ex Fries, by the more hirsute 
or strigose pubescence on the pileus, and by the smaller size. 
Specimens collected at Cincinnati by D. L. James and referred 
to P. velutinus Fries are now referred to this species. 
5 P. hirsutus Wulfen, ex Fries, Syst. Myc. т: 367. 1821. 
Boletus hirsutus Wulfen, in Jacq. Coll. 2: 149. 1788. 
Pileus sessile, or effused-reflexed, dimidiate, 1.5-5 x 1,5-7 
x 0.2-1 cm., flexible when moist, firm and sometimes rigid 
when dry, grayish to yellowish or smoky brown, hirsute or 
tomentose, sometimes zonate, sometimes concentrically sulcate, 
the margin thin or rather thick, acute, sometimes dark colored; 
context white or pallid, tough to soft-corky, 1-6 mm. thick; 
tubes 1-4 mm. long, the mouths white, grayish or fuliginous, 
circular to somewhat angular, averaging 3-4 to a mm., the 
walls rather thick and always entire; spores white, smooth, 
cylindrical, often curved, 2.5 x 5-8 и. 
On dead wood of deciduous trees. Found throughout the 
year. 
From closely related species with а conspicuous hairy covering 
this plant is perhaps most easily separated by the persistently 
thick walled tubes that never become torn or lacerate. Any 
plant with the characteristies of this group and possessing the 
dark-colored marginal band to which reference is made in the 
description may always with safety be referred to this species. 
From P. versicolor L. ex Fries, the plant is separated by the 
absence of the numerous multicolored zones. Нага’ѕ figure 
(Mushrooms f. 342) is not a good illustration of our plant. 
Murrill describes the plant under the name of Coriolus nigro- 
marginatus (Schw.) Murr. 
6. P. conchifer Schw. ex Fries, Epicr. Syst. Myc. 463. 1838. 
Boletus conchifer Schw. Syn. Fung. Car. 98. 1822. 
Pileus sessile or attached by a lateral tubercle and then 
appearing substipitate, reniform to dimidiate in outline, 1-3 
x 1-4 x 0.1-0.3 cm., coriaceous, white to yellowish, glabrous, 
