674 (74) MUSCI. (MOSSES.) 
§15. HYPNUM — —— procumbent or ascending, irregularly divided, 
with a more or 1 ification, sparingly villous: leaves ovate-lan- 
ceolate, more or less long acuminate, eesually niboecsind or falcate-secund, obsoletely 
‘ate, “ei shining ; cellules linear, compact : capsule annulate, 
€ 
mostly oblong an -cernuous : operculum conic, more or less rost 
46. Hi. molluscuim, Hedw. Dicecious; grows in soft mats; stems 
rocumbent cr ascending, dceeebonity divided ; the divisions vay closely 
and pinnately ramulose, much as in No. 45; branchlets incurved at their 
serrate ; capsule horizontal, turgid-oval. — On rocks and on the ground, in dense 
woods ; as in mountainous regions. (Eu. 
47. upr £ tienen e, L. Diccious; stems creeping, irregularly or 
sibiniiai en mulose ; leaves broadly ae care attenuated, often ser- 
rulate at the point, reuinenteicra capsule oblon rect-cern 
ous ; annulus broad ; operculum convex-conic, more or less tied ronal 
—Hilly districts, on the trunks of trees, rocks, or on the ground, in shade 
Diccious; stems prostrate, extended, di- 
eayed logs ; forming extensive thin mats, in localities not mountainous. — One 
of our most common species. 
49. Hi. réptile, Michx. Moneecious; stems slender, creeping, elongated, 
subpinnately ramulose; leaves ovate-oblong, moderately acuminated, subse- 
cund, more or less faleate, strongly serrate at the point; capsule cylindrical, 
erect-cernuous ; operculum large, rostellate from a tumid base.— Smaller than 
the last ; occurs only in mountainous districts, where it is very common. (Eu.) 
50. Hi. eurvifOlium, Hedw. Diccious; in general aspect like No. 47 
and 48, but larger, and not so pinnately setae readily recognized by its 
large, cernuous, and, when dry, sulcate capsule ; y the conspicuous whit- 
ish, plicate, perichetial leaves. — Grows with ne mn . 
51. H. Haldanianum, Grey. Moncéciotis; stems creeping, irregu- 
larly branched ; branches subcompressed ; leaves ovate-lanceolate and broadly 
oblong-lanceolate, entire, spreading, more or less secund ; eS , elongated, 
cylindrical, nearly erect, slightly incurved ; operculum y conic or subros- 
tellate. — Grows in same places as the last. (Eu.) 
52. I. m nemorosum, Koch. Moneecious; stems creeping, elongated, 
with several ich ly and fasciculately 
ramulose ; branchlets subcompressed ; leaves ovate-lanceolate, with a long an 
narrow stron, rrate and subfiex point, patent, more or less secund; 
a oblong, erect-incurved ; operculum short-conic.— Decayed logs, on 
mmits of the Alleghany Mountains. — About the size of No. 48. (Eu.) 
53. Hi. pratémse, Koch. Dicecious (in specimens psendo- 
moneecious, Bryol. Europ.) ; stems ascending, ha nuideigieet y branched ; 
