1914] 
OVERHOLTS—THE POLYPORACEJE OF OHIO 107 
mycete (Sphaeria) by Schweinitz and later transferred to the 
genus Enslinia (Pyrenomycetes) by Fries. Excellent illustra- 
tions are given by Lloyd (Мус. Notes, Polyp. Issue 3: f. 369— 
70; Syn. Stip. Polyp. f. 443). 
30. P. brumalis Pers. ex Fries, Syst. Мус. 1: 348. 1821. 
Boletus brumalis Pers. Neues Mag. Bot. 1:107. 1794. 
Pileus stipitate, circular in outline, sometimes somewhat um- 
bilieate in the center, 1.5-5 cm. broad, 0.2-0.4 em. thick, 
fleshy-tough when fresh, rigid when dry, varying in color from 
yellowish brown to dark brown or almost black, minutely 
hispid to glabrous, rarely slightly squamulose, usually azonate 
but at times distinctly zoned, margin thin and entire, involute 
when young and incurved on drying; context white or pallid, 
soft-fibrous when fresh, firm when dry, 2 mm. or less thick; 
tubes 1-3 mm. long, usually slightly decurrent, the mouths 
white or whitish, at first circular and thick walled, later angu- 
lar and the dissepiments thinner, averaging 2-3 to a mm.; 
stipe central or subcentral, simple, cylindrical, grayish or brown- 
ish, minutely hispid or glabrous, 2-3 em. long, 0.2-0.3 em. thick; 
spores white, oblong, sometimes slightly curved at one end, 
smooth, 2.5 x 9 и. 
Growing on dead wood in the fall and early winter. Common. 
P. brumalis and P. arcularius are closely related species that 
are not always easy to separate. In general the forms occur- 
ring in the early spring and summer are likely to be P. arcularius, 
while those found in autumn and often late in winter are more 
likely to be P. brumalis. Hard (Mushrooms f. 335) gives a good 
illustration of the plant. 
31. Р. агсшагіиѕ Batsch. ex Fries, Syst. Myc. 1: 342. 1821. 
Boletus arcularius Batsch. El. Fung. 97. 1783. P.arcular- 
iformis Murrill, Torreya 4:151. 1904. 
Pileus stipitate, circular in outline, convex to umbilicate, 
sometimes infundibuliform, 1-8 cm. broad, 1-4 mm. thick, 
fleshy-tough or coriaceous when fresh, rigid when dry, golden 
brown to dark brown, usually more or less squamulose, azonate, 
the margin usually distinctly ciliate, involute on drying; con- 
text white or pallid, fibrous-fleshy when fresh, compact-fibrous 
when dry, less than 2 mm. thick; tubes 1-2 mm. long, often 
decurrent, the mouths white, discolored on drying, angular and 
