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3. G. ap o c a rp a , Hedw. More robust and not as densely
tufted as tlie preceding; leaves open from an erect base
when moist, lanceolate from the enlarged concave base, carinate
above, recurved on tlie borders, often hyaline-denticulate at the
apex ; costa vanishing below the apex or excurrent into a rouo-h
pellucid point: capsule ovate, thick; lid purple with a long”er
acuminate beak; peristome dark purple, with broader nearly
entire scarcely perforate teeth; annulus none. —Muse. Frond.
1. 113, t. 39. Brgum apomrpum, Linn. Sp. Pi. 1115. Schisti-
dium apocarptim.^ Bruch & Schim]^. Biyol. Eur. t, 233, 234 *
Sulliv. Mosses of U. States, 36. ’ ’
Var. g ra c ilis, Nees Æ Hornsch. Stems longer, slender:
leaves spreading all around or inclined to one “side; fruits
lateral by prolongation of tlie innovations.
Vai. riv u la ris , Nees & Hornsch. Loosely cespitose, fasci-
culate-branching, blackisli green : leaves ovate-lanceolate, blunt
at the apex ; capsule turbinate and wide-mouthed when empty.
Hab On stone, rocks, walls, etc., rarely on wood; the first variety o n .
dry locks iu mountains; the second common on rocks in streams.
4. G. p la ty p h y lla , Mitt. Leaves incurved and imbricate,
broadly ovate, blunt at the apex or produced into a short
diaphanous point by the percurrent thick costa, revolute on the
borders; perichætial leaves broadly oval, oblong, angular,
obtuse at the apex, loosely areolate, with long delicate meshes
to near the apex. — Journ. Linn. Soc. viii. 20.
Ha b . Davis Straits ( Taylor),
This species, says the author, is in appearance like G. apocarpa, var
stricta, but the leaves are more than twice as wide and imbricated both
m the wet .and dry state, the perichætial with very la.x areolation for two-
thirds of tlieir length.
5. G. Agassizii. Stems short; branches fasciculate at the
apex : leaves appressed when dry, erect when moist and shining,
blackish, linear-lanceolate from a slightly broader base, obtuse
and coarsely sparingly dentate at the apex; costa vanishing
below the apex ; perichætial leaves longer and obtuse : capsule
oblong ; beak of the lid short and obtuse ; teeth dark red, thick
and entire below, pale and cribrose aboYe. — Schistidiurn
Agassizii, Sulliv. Æ Lesq. Muse. Bor.-Am. Exsicc. n. I37-
Sulliv. Mosses of U. States, 104.
H ab. Kocks washed by the waves; Lake Superior (L. Agassiz, 1848)
Closely allied to G. maritima, from which it differs in the longer narrower
Unear-lanceolate leaves, marked at the obtuse apex by a few large
teeth and more narrowly costate, the more compact areolation, the short-
beaked obtuse lid, the teeth pale red and cribrose in the upper part only,
etc.
6. G. m a r itim a , Turn. Densely tufted, dark green or
blackish: leaves closely imbricate, curved and more or less
twisted when dry, lanceolate-acuminate or mucronate, and carinate
by a thick excurrent costa ; borders nearly flat : capsule
obovate, truncate ; teeth minutely cribrose, ferruginous.—Muso.
Hihern. 23, t. 3. Schistidium maritimum, Bruch & Schimp.
Bryol. Eur. t. 235 ; Sulliv. Mosses of U. States, 36.
Hab. Sea coast, on rocks at Nahant, Massachusetts (Lesquereux).
S u bg en u s II. SCOULERIA.
Plants of large fine growth, dichotomous. Leaves thick,
chlorophyllose. Capsule immersed, globose, on short lateral
branches. Operculum fixed and persistent upon the columella.
Peristome of 16 teeth, divided into 32 short broadly lanceolate-
subulate segments, inflexed when moist, erect w'hen dry.
7. G. ScOTlleri, Muell. Plants dark green or black : stem-
leaves imbricate, open, spreading when moist, broadly ovate,
obtuse, carinate, flat on the borders, dentate from the middle
upward ; costa strong, brown ; cells round or hexagonal, inflated
or thick-walled above, larger, subquadrate and pellucid at base ;
perichætial leaves similar: calyptra glabrous: capsule large,
globose-turgid, thick, dark brown, with a broad orifice ; lid
small, flat, with a short conical apex. — Syn. ii. 654. Scouleria
aquatica. Hook, in Drumm. Muso. Amer. n. 63, and Bot. Misc.
ii. 33, t. 18 ; Schwaegr. Suppl. iv., t. 315.
H a e . On rocks in running water, upon the Pacific slope; Portage
Kiver (Scouler, who gave specimens to Drummond); on granite rocks in
Merced River, California (Bolander); Columbia River (Lyall); near
Portland, Oregon (Morris, E. Hall); Spokan Falls, abundant (Watson).
A beautiful and remarkable species, related to Cinclidotus in its mode
of growth and the exserted columella, and to Grimmia in the areolation
and other characters.
SuBGKNUs III. GASTEROGRIMMIA.
Plants in short compact tufts. Leaves short. Inflorescence
monoecious. Capsule emergent or immersed, borne on a short
arcuate pedicel, ovate, ventricose on the lower side. Lid mamil