* * Diaxious: stems tomentose: capsule ei'ect, regular.
12. I>, m o iitriH itiB U , Ilcdw. Compactly caispitose; leaves bright-green,
soft, patent, rather secund, crisped when dry, lanceolate-subulate, sciTate on tho
margin, and papillose on tho back at tho apex; costa strong, pcrcun'cnt; capsule
oblong, silicate wlicn d ry ; annulus double. — On trunks of trees, Goat Island,
Niagara Falls, Lesquereux. (Eu.)
13. 1>. llag :c lU \B'C, Hedw. Near the last species, but distinct by its nu
mcrous fragile and short erect iiagella), furnished -with minute appressed lanceolate
ecostate leaves; stem-leaves greenish-yellow, more falcate-secund; the capsule
longer and narrower. — On decayed logs in woods; very common. (Eu.)
14. B . iB B tc rru p tu iB a , Br. & Sch. Stems high; leaves long,
secuud-falcatc, or spreading every way, flexuous, siibulatcly attenuated from a
lanceolate base; costa broad, predominant, denticulate at the apex; capsule
cylindrical, annulate, dark brown. — On rocks in mountain districts. — A rather
harsh, dark-green species, somewhat larger than No. 12 and 13. (Eu.)
15. I>. S o ilg iib liU B a i) Hedw. Loosely ciespitose, palc-grccn ; stems
elongated, slender, arcuate-ascending; leaves circinate-secund, very long, fili-
fonnly attenuated, with a remarkably broad costa, denticulate on the margins
and the back at the apex; capsule elliptic-cylindrical. — Shaded rocks, Alleghany
Mountains. (Eu.)
* * * Dicecious: stems tomentose; capsule incurved-cernuous.
16. I>. s c o p a rm B B i, L. Loosely cinspitose; stems 2 '- 4 'h ig h ; leaves
secund or falcate-secund, lanceolate-subulate, carinate-concave, serrate at the
a p e x ; costa with prominent ridges at the back, dentate above; capsule cylindrical,
slightly cernuous. — Var. p a l l i d u m (Muse. AUeghan., No. 155) has
narrower leaves, with a looser areolation, the lower ai'colre not sinuous, the costa
with ridges only near the point; pedicel pale yellow.—Alleghany Mountains;
rare. — The variety in districts not mountainous, and very common. (Tab.
II.) (Eu.)
17. I> . e lo u g : a .t i in i9 Schwaegr. Compactly c^nspitose; stems slender,
4 '- 5 ' long; leaves lanceolate-subulate, entire, erect-patent; capsule gibbous-
ovate, striate, annulate. — High peaks of the Alleghany Mountains : north shore
of Lake Superior, Agassiz. (Eu.)
18. I>. c o n g ^ e s t l im , Brid. Loosely c£cspitosc; leaves spreading, sub-
secund, flexuous, lanceolate-subulate, denticulate at the apex, crisped when d ry ;
costa strong, excurrent; capsule oval-oblong, much incurved, striated. — On
rocks, in mountainous districts; common. (Eu.)
19. 5>. p a l u s t r c , Brid. Stems 3 '- 4 ' high; leaves spreading, linear-
lanceolate, undulated, serrate on the margin and also the back at the ap e x ;
costa slender and vanishing below the p o in t; capsule oval-oblong, slightly incurved,
striated; annulus none. — In cranbeny marshes. Northern Ohio, Lesquereux.
(Eu.)
20. I>. S e li r s k c le i i, "vyeb. & Mohr. Densely tufted; stems 3 ' - 5 ' long;
leaves crowded, erect-patent, oblong-lanceolate, rather obtuse, undulated, tho
upper half serrated on the margins and papillose on the back; costa ceasing
below tlie apex; capsule incurved-oblong, annulate. — Bogs, in mountainous
districts. (Eu.)
21. D . s p ù r i a i u i , Ilodw. Stems usually short, thick and condensed;
loaves ovate-lanccolato, acuminate, undulated, serrate; costa serrated on the
back above, ceasing below the apex ; capsule cylindrieal, slightly strumose and
incurved; when dry strongly ribbed. — (D. pallidum, Bnjol E u ro p .) — Dxy
sandy soil, Ohio, and Southern States. (Eu.)
22. B . Turner. Loosely coespitose; stems 4 '-G ' long,
robust; leaves widely spreading, tbe upper ones falcate-secund, lincar-lauceo-
lato from an oblong base, very mucb undulated, sbarply serrate on tho margin
and tho back near tho apex ; costa slender; capsule cylindrical, strongly arcuate,
on long pedicels, 2 to 5 from the same perichæth. — On the ground, in dry
woods; common. (Eu.)
23. D . D r u i n i n ô l l d i i , Mull. — Very like No. 22, but distinguished by
its longer and narrower leaves, not so sharply serrate, papillose only on the
back, and cirrhose-crisped when dry. — White Mountains of New Hampshire,
Oakes: Lake Superior, Agassiz. (Eu.)
1 5 . C E R À T O B O W , Brid. (Tab. I.)
Calyptra cuculliform. Operculum couic, subrostellate. Capsule cylindrical,
Eubcernuous, annulate, long-pedlcollate. Peristome single: teeth 16, linear-
lanceolate, cloven nearly to the base into two equal segments ; their mticulations
prominent. lufloroscence dioecious, terminal : male flower gemmiform.__
Densely cæspitosc plants, with fastigiate ramification ; leaves lanceolate or lanceolate
subulate, costate ; the areolæ above dense, roundish and small, below larger
and diaphanous. (Name from Kepas, a Itorn, and obàv, a tooth, the teeth of tho
peristome being nodulose like a goat’s horn.)
I. C . p m - p i i r c n s , Brid. Leaves oblong-lanceolate, carinate, the margins
recurved; costa excurrcnt; capsule pmplish-red, shining, ribbed and strumose
when dry. — Very common everywhere : on the ground. (Tab. I.) (Eu.)
T r ib e V. L E U C O B R Y È Æ .
1 6 . t E U C O B B Y U M , Hampc. (Tab. II.)
Calyptra cuculliform. Operculum with a long-subulate rostrum. Capsule
oblong-ccmuous, strumose, long-pedicellate. Peristome as in Dicranum. In florescence
monoecious ; male.flower terminal. — White or pale-glaucous mosses,
growing in dense compact masses ; stems dichotomously branched ; leaves lan-
coolatc-subnlate, ecostate, composed of two or more layers of large, pellncid,
empty, rectangular-oblong, perforated cellules, with minute 3 -4-sided intercellular
chlorophyllose passages. (Name composed of XevKos, white, and ^pvov,
a moss, from its pallid color.)
I- E . g - la iT c u m , Hampe. Stems 3 '- 6 ' high; leaves fragile, crowded,
convolute above ; capsule reddish-brown, ribbed whoa dry. — (Dicranum glau-
cum, Hedw.)— About the roots of trees iu moist ground, margins of swamps.