[Vor. 1 
96 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
rather thin and usually becoming lacerate and broken up into 
teeth at an early stage of growth, sometimes remaining poroid, 
especially toward the margin of the pileus; spores white, smooth, 
oblong, curved, 2-2.6 x 7-8 y. 
Growing on oldlogs. September to December. Common. 
The following group of characters will usually identify 
the species: the semi-resupinate habit of growth, whitish or 
tan-colored pileus, and the rather long tubes with large mouths, 
soon breaking up into teeth. P. molliusculus was named by 
Berkeley from specimens sent to him from Ohio by Lea. Mor- 
gan's determination of P. molliusculus was an error, his plants 
belonging to P. pubescens Schum. ex. Fries. Kellerman re- 
peated the error in distributing P. molliusculus in his “Оһо 
Fungi Fascicles.’ For illustration see Hard, Mushrooms f. 341. 
IO. P. semipileatus Peck, Ann. Rept. N. Y. State Mus. 
34: 43. 1881. 
Plants resupinate or effused-reflexed, rarely strictly sessile; 
pileus dimidiate or elongate, 0-1.5 x 0.7-3.5 x 0.1-0.5 cm., 
soft and spongy when fresh, rigid when dry, white, yellowish, 
or reddish brown, slightly tomentose to glabrous, azonate, 
margin thin, acute; context whitish, soft when fresh, firm when 
dry, 1-4 mm. thick; tubes less than 2 mm. long, the mouths 
white, greenish or somewhat violaceous, angular, minute, 
averaging 4-6 to a mm., the walls entire; spores white, smooth, 
oblong, curved, 1 x 3-4 y. 
On old limbs on the ground. September to December. Rare. 
Easily recognized by the minute pores, the semi—resupinate 
habit of growth, and the often violet tinted hymenium. There 
is no previous record of the plant occurring in Ohio. Collec- 
tions were made at Oxford, in 1911, for the first time. 
тг. P. caesius Schrad. ex Fries, Syst. Myc. т: 360. 1821. 
Boletus caesius Schrad. Spic. Fl. Ger. 167. 1794. 
Pileus sessile or effused-reflexed, dimidiate, 1-3.5 x 2-6 x 
0,3-2 em., soft and spongy when fresh, rigid when dry, whitish 
to cinereous, often with a bluish tinge, distinctly villous or 
tomentose especially behind; azonate, margin thin and acute; 
context white, soft, spongy and full of water when fresh, friable 
when dry, 0.3-1 em. thick; tubes 2-7 mm. long, mouths white, 
раШа, or bluish gray, angular, averaging 3-5 to а mm., the 
