194 Cincinnati Society of Natural History. 
bilicate, plicate. Stipe horny, hollow, shining, glabrous, blackish. 
Lamelle few, broad, distant, joined behind toa free collar, whitish. 
Upon trunks and leaves. Pileus $ an inch or less in breadth, the 
stipe 1-2 in. long. Pileus whitish and of a uniform color or the disk 
darker; the stipe is whitish at the apex. 
17. M. CAPILLaRis, n. sp.—Pileus membranaceous, convex, umbili- 
cate, sulcate. Stipe capillary, very long, glabrous, shining, black with 
a pallid apex. Lamelle adnate to a free collar, equal, numerous, not 
distant, pallid. 
Growing on leaves and sticks. Pileus 1-2 lines in diameter, the 
stipe 2-24 in. long. The pileus is of a.grayish or brownish-pallid color; 
it is suleate with 16-20 furrows which correspond to as many lamelle 
underneath; the stipe is very long and scarcely thicker than a hair. 
Its place is between M. rotula and M. graminum ; it differs from the 
latter in its umbilicate pileus, and from the former in its capillary 
stipe; it is closely related to both by the free collar. 
Genus XIJ.—Lentinus, Fr. 
Pileus fleshy-coriaceous, tough, or in the fleshy kinds hardened 
when mature, persistent. Lamellze thin, unequal, membranaceous; 
the edge serrate or lacero-dentate. Spores even, white. 
A. Pileus almost entire, the stipe evident. 
a. Pileus scaly, 1, 2. 
b. Pileus villous, 3, 4. 
c. Pileus glabrous, 5-7. 
B. Pileus dimidiate, sessile, 8-10. 
A. Pileus almost entire, the stipe evident. 
a. Pileus scaly. . 
1. L. TrgRInus, Buil.—Pileus fleshy-coriaceous, thin, orbicular, um- 
bilicate, whitish; scales innate, hairy, blackish. Stipe slender, not 
striate, scaly; the apex somewhat veiled. Lamelle attenuate de- 
current, very narrow, white becoming yellowish. Spores elliptic 
.0066.0033 mm. a 
On wood of oak. Pileus about 2 in. broad, stipe 1-2 in. long. 
Pileus thin, the margin at length split; stipe dirty white. When fresh 
very tender, when dry coriaceous. 
2. L. sutcatus, Berk.—Pileus a little fleshy, at first somewhat conic, 
at length hemispheric, broken up into scales, silky-virgate, reddish- 
prown; the margin sulcate. Stipe short, solid, furfuraceous, concolor- 
