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pinkish where wounded ; tubes nearly plane, adnate, their mouths 
rather large, angular, at first bright red, becoming reddish-brown ; 
stem equal or slightly thickened below, red; spores oblong, .0005 
in. long, .00016 broad. Pileus 1-2 in. broad; stem I-—2 in. long, 
2~3 lines thick. 
Grassy woods. Auburn, Alabama. July. Underwood. 
This is one of the smallest species of the tribe. It is referable 
to the tribe Luridi. 
BOLETUS FRUSTULOSUS. 
Pileus thick, convex or nearly plane, subglabrous, rimosely 
areolate, white or whitish, flesh whitish; tubes equal to or a little 
longer than the thickness of the flesh of the pileus, depressed 
about the stem, whitish, becoming pale brown; stem equal, solid, 
whitish, reticulated above; spores .0006-.0007 in. long, .0002— 
.00025 broad. Pileus 3-5 in. broad; stem 1-2 in. long, 6-10 
lines thick. 
Open ground and clay banks. Ocean Springs, Mississippi 
and Akron, Alabama. May and June. Underwood. 
The deeply cracked surface of the pileus is the most notable 
feature of this species. This sometimes is seen even in quite 
young plants. The areolae are quite unequal in size. The deep 
chinks with sloping sides cause them to appear like frustra of 
polygonal pyramids. In some specimens the reticulations of the 
stem extend nearly or quite to its base, and make the place of the 
species ambiguous between the Calopodes and Edules. 
BOLETUS ISABELLINUS. 
Pileus convex, firm, minutely tomentose, whitish, becoming 
darker and smoother with age, flesh isabelline; tubes adnate, mi- 
nute, sometimes larger near the stem, nearly round, whitish ; stem 
nearly equal, subglabrous, hollow, whitish; spores subelliptical, 
.0003-.00035 in. long, -0002-.00025 broad. Pileus 2~3 in. broad; 
stem 1-2 in. long, 4-6 lines thick. 
Woods. Ocean Springs, Mississippi. June. Underwood. 
The species belongs to the Cariosi. 
Potyporus Burr. 
Pileus dimidiate, 1-2 in. broad, tough, sessile or effuso-reflexed, 
minutely tomentose, smoky whitish or pallid, flesh 1~2 lines thick, 
pallid; pores .5-1 line long, unequal, angular, extending to the 
margin, smoky black, their dissepiments thin. 
_ Yellow birch, Betula lutea, Middleburg, Vermont. December. 
oo AS. A. Burt, 
