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4. A. a p ic u la tu s , Bruch & Schimii. Differs from the last
in the stems more divided and less flattened, the leaves more
densely areolate, and covered with longer poaiflllæ, auricnlate
and fimbriate-papillose at base, and the borders undulate, the
capsule longer and without annulus. — Bryol. Eur. Anomodon,
6 ; Sulliv. Mosses of U. States, 58, and Icon. Muse. 120, t. 75.
Ilypnum Mugelii, Muell. Syn. ii. 473, fide Lindb.
H a e . On decayed logs, in mountain districts.
5. A. V iticu lo su s, Hook. & Tayl. Plants large, in wide
tufts, dark green above, ochreous within ; primary stems long,
creeping, the secondary erect, simple, or geniculate by repeated
innovations : leaves secund and subfalcate, crispate when dry,
ovate-lanceolate, blunt at the apex ; areolation very dense and
minutely papillose ; perichætial leaves long, 'linear-acuminate
from an ovate base; costa strong: capsnle long-cylindrical,
straight or slightly curved; pedicel twisted; operculum narrowly
conical ; teeth narrowly lanceolate, sometimes irregular ;
segments filiform, fragile and irregular; annulus of a double
row of small cells. —Muse. Brit. ed. 2, 138, t. 22; Bryol. Eur.
t. 476. Ilypnum viticulosum, Linn. Spec. PI. 1127.
Hab. Shaded rocks; Niagara Palls, sterile; Wisconsin (Lapham);
Owen Sound, Canada, fertile (Mrs. Boy).
6. A. T occosb, Sulliv. & Lesq. Habit, mode of growth
and color as in A. apicidatus : primary stems prostrate, naked
or beset with few small leaves and few radicles, the secondary
erect, simple or irregularly divided into short branches, densely
foliate, arched when dry: leaves open, erect, lanceolate-acnte
from an ovate-oblong base, coarsely and unequally dentate
toward the apex, plicate at base and reflexed on the margins ;
meshes of the areolation very small, not papillose, round-
quadrate, in oblique rows ; costa stout, terete, subpercurrent ;
upper perichætial leaves lanceolate, gradually narrowed into a
long filiform acumen, oostate: fruit unknown. — Muso. Bor.-
Amer. Exsicc. n. 240; Sulliv. Mosses of U. States, 58, and
loon. Muse. 121, t. 76, A.
H a e . On rocks, near the base of Toccoa Palls, Northern Georgia
(Lesquereux).
7. A. Californicus, Lesq. Loosely cespitose, dirty yellow
above, brown below ; secondary stems branching by innovations,
or continuous and simple, slender, angular when dry by the
appressed imbricated four-ranked leaves: leaves open when
moistened, half-olasping and decurrent at the auricnlate base,
broadly ovate, acute, replicate on the margin to above the middle,
reflexed to the point, carínate by the stout pale subpercurrent
costa ; alar cells ohlong, the upper ovate-quadrate, papillose
on both faces ; auricles dentioulate-spinose : fruit unknown. —
Mem. Calif. Acad. i. 30.
H a b . Monte Diablo, California (Bolander).
The base of tbe leaves is rounded into a large ciliate auricle, as in H.
apiculatus, and the margins above are also minutely denticulate by the
protrusion of the papillate cells, but this is the only point of affinity between
the species, the leaves being broadly ovate-acute, carinate, and imbricate
all around when dry.
T e i b e XXII. ORTHOTHECIEÆ.
Plants generally large, widely spreading and cespitose, creeping
and ramulose; branches erect or complánate. Leaves
smooth, sometimes sulcate, oostate or ecostate or hicostate at
base ; areolation narrowly rhomhoidal or linear, large and quadrate
at the basal angles. Capsule erect or subinclined.
122. PLATYGYRIUM, Bruch & Schimp. (PL 5.)
Plants intricate, cespitóse, pinnately ramulose. Leaves
densely crowded, spreading when moistened, imbricate when
dry, subscarious, glossy, ecostate; areolation narrowly rhom-
boidal above, sublinear in the middle, larger and quadrate at
the angles. Flowers dicecious. Calyptra dimidiate, long,
twisted. Capsule oblong, cylindrioal and regular. Operculum
long and narrowly conical, blunt at the apex, smooth. Teeth
of the peristome free to below the orifice of the capsule, narrowly
lanceolate, hyaline on the borders ; segments free to the
base, narrow, linear, as long as the teeth ; cilia none. Annulus
very large, compound, persistent.
1. P. re p en s , Bruch & Schimp. Tufts bright yellowish
green : leaves ovate or oblong-lanceolate, acute, concave,
recurved on the borders, very entire ; perichætial leaves loosely
imbricate, longer : capsule dirty yellow, brown when old ; teeth
orange, hyaline on the borders ; segments of the same color. —
Bryol. Eur. t. 458. Pterigynandrum repens, Brid. Muso. Recent.
Suppl. i. 131. Pterogonium, Schwaegr. Suppl. i. 100, t. 27.