667 
MUSCI. (MOSSES.) 
ovate, pointed, concave; the nerve extending two thirds its length; 
capsule oblong, urn-shaped, annulate, immersed in the perich. leaves; 
spores large (diameter of one equalling the width of a tooth of the 
peristome at its base). (Cryph&a filiformis, Brid.) — Trees, S. Ohio. 
Leskeace^:. 
4:3. ISOTHECIUM, Bridel. Isothecium. 
Calyptra cuculliform. Capsule lateral, erect, annulate. Peris¬ 
tome double; the exterior of 16 linear teeth ; the interior 16 cilia 
connected at the base by a very narrow membrane. Lid conic, 
more or less beaked. Inflorescence as in Leskea. (Name com¬ 
posed of la-os, equal, and Gtjklov, a little case , from the symmetrical 
capsule.) 
1* I* cladorrluzans, Hedw. Stems prostrate; the rather 
pinnate branches much compressed ; haves concave , oblong-ovate, sud¬ 
denly pointed, more or less apiculate, shining, somewhat serrulate at 
the apex, indistinctly 2*nerved at the base, imbricated; capsule erect, 
cylindrical; lid elongate-conic, obtuse. — Woods, common on old logs, 
&c., near the ground, forming large mats; conspicuous by the broad 
flat branches, and greenish-yellow foliage, dashed with bright brown. 
2. I, compressitm, Hedw. Allied to the preceding, but 
smaller and more delicate, of a lax mode of growth ; sterns more regu¬ 
larly pinnate ; leaves less densely imbricated ; lid taper-beaked; bears 
fruit less copiously. (L6skea compressa, Hedw.) —Pennsylvania. 
3. I. seductrix, Hedw. Separated from No. 1, by its cylin- 
draceous branches: bears fruit much more abundantly, and affects hu¬ 
mid situations.— Margins of swamps, on old logs and roots of trees. 
— Its numerous dark-red pedicels give a striking character. 
4. I. b revise turn, Wils. & Hook. Branches short, crowded , 
thick, not compressed ; leaves less densely imbricated and their points 
longer and more attenuated than in Nos. 1 and 3; the inner peris 
tome often reduced to a delicate membrane lining the inner face and 
bordering the edges of the teeth.—Dry places, tops ot dead stan 
ing trees, &c. Fruits sparingly : pedicels brownish-yellow. 
5. I. viticuldsum, Hedw. Stems creeping, loosel) b ra n ch 
ed ; branches nearly erect , elongated, simple, terete ; leaves ovate gi 
crowded, spreading, rather onesided, obtuse , the nerve reae ing , 
ly to the apex; capsule erect, cylindrical; lid.conic, P° inl ^/ 
odon and Neckera of authors.) — Old logs, &c., ,n 1 - 
6- I. minus, Beauv. Separated from No. o h) i its cornp 
stems and branches, somewhat 2-ranked and very obtuse leaves, 
large annulus. — Woods, on trees, near water-courses 
