1914] 
OVERHOLTS—THE POLYPORACEJE OF OHIO 97 
walls thin and usually lacerate; spores minute, white, smooth, 
cylindrical, sometimes curved, 1.2-1.5 x 4.7-5.2 y. 
On dead wood of deciduous and coniferous trees. October 
to December. Rare. 
The bluish color of the pileus and hymenium is so often 
wanting that other characters must frequently be used in the 
identification of the plant. The slender tubes, usually longer 
than or as long as the thickness of the context, is apparently 
a rather constant character of the plant. The villous or tomen- 
tose pileus separates it from P. chioneus Fries and P. lacteus 
Fries and these are the only species with which it is likely to 
be confused. 
I2. P. chioneus Fries, Syst. Myc. І: 359. 1821. 
Pileus sessile, dimidiate, 1-3 x 2-5 x 0.5-3 cm., soft and 
spongy when fresh, rigid when dry, whitish to grayish or yel- 
lowish, azonate, glabrous or with a slight strigose tomentum 
towards the base, sometimes covered with a thin grayish or 
yellowish pellicle that becomes more evident on drying; margin 
acute, sometimes inflexed on drying; context white, soft and 
spongy when fresh, fragile when dry, 0.3-2 cm. thick, azonate, 
with a sweet acid odor; tubes 1-8 mm. long, mouths white or 
yellowish, usually glistening, angular, averaging 3-4 to a mm., 
the walls thin but entire; spores white, smooth, oblong, slightly 
curved, 1-1.7 x 4-5 y. 
On dead wood. September to November. 
From P. galactinus Berk. this plant is most easily separated 
by the oblong, curved spores. Тһе usually glabrous pileus 
and the absence of bluish tints separates it from P. caesius 
Schrad. ex Fries. Whether it is distinct from P. lacteus Fries 
may well be doubted. "The plant is much in dispute in Europe. 
Our plants have been described as P. albellus Peck. 
13. P. lacteus Fries, Syst. Myc. т: 359. 1821. 
Pileus pure white, fleshy-fibrous, fragile, triangular, pubes- 
cent, azonate externally and internally, margin inflexed, acute; 
pores thin acute, dentate, becoming torn and labyrinthiform. 
Commonly small and thin but sometimes large and transversely 
elongate, often gibbous behind, becoming glabrate and uneven. 
(Adapted from Fries, Hymen. Eur. 546.) 
On dead wood of deciduous trees. Rare. 
