1. L. sciuroicles, Scliwacgr. Tufts rigid, dark and olive-
green : leaves densely crowded, imbricate when dry, open Avhen
moistened, ovate-lanceolate, sharply acuminate, 5-plicate lengthwise
; perichætial leaves pale, not plicate : calyptra yellowish
brown at the apex : capsule elliptical or ovate-oblong, fuscous,
exserted on a thick pedicel, twisted to the right when dry ;
operculum conical, uniform in color; teeth slender, whitish,
distantly articulate, entire or split toward the base ; annulus
simple, detached by fragments. — Suppl. i. 2. 1, t. 125, figs. *
and 1/ ; Bryol. Eur. t. 4(J8. Hypnum sciiiroides, Linn. Spec.
PL 1130. Neckera sciuroides, Muell. Syn. ii. 107.
IlAu. On trees, Owen Sound, Ontario, Canada (Mrs. Roy).
2. L. ju ia ,C S U S , Sulliv. Secondary stems short, numerous,
terete ; leaves crowded, densely imbricate when dry, spreading
horhzontally when moist, lanceolate-acuminate from an ovate-
ellip'tica! base, recurved on the borders, sliglitly serrulate at the
ajiex ; inner perichætial loaves exserted, ohlong, narrowed into
a filiform acumen reaching nearly to the base of the capsule,
convolute : calyptra large, plicate at base, clasping the top of
tlie pedicel: capsule oval, turgid, chestnut-color; operculum
conical, obliquely short-rostr.ate ; teeth of the peristome broad,
linear, whitish, punctulate, bifid at the apex; inner membrane
very thin, narrow; annulus none. — IMiiso. Allegh. n. 87, and
Icon. Muse. 110, t. 69. Pterigynandrum julaceum, Hedw.
Muse. I rond. iv. 51, t. 20. Neckera pseudalopecura, Muell.
1. c. 92.
H a b . On trops, Northeastern slope of America; very common.
3. L. b r a c h y p u s , Brid. Differs from the last in its larger
size, the leaves inclined to one side, plicate-striate, the perichætial
loosely appressed, the upper surpassing the more oblong
capsule. — Bryol. Univ. ii. 210 ; Sulliv. Icon. Muse. I l l , t. 70.
Neckei-a brachypus, Muell. 1. c. 108.
H a b. Common in mountainous districts; more rarely fruiting.
109. PTERIQYNAND.RUM, Iledw.
Stems jirostrate or ap]n-essed ; branches and branchlets flagel-
liform; basilar stolons numerous, with small leaves. Leaves
densely crowded, spreading or subsecund, subscarious, papillose
on the back, obovate or spatulate, apiculate, costate to the
middle ; areolation dense, rhomhoidal above, rectangular in
the middle; paraphyllia small, polymorphous. Flowers dioecious.
Calyptra cucullate, large, covering the capsule to below
the middle. Capsule erect, cylindrical-oblong. Operculum
rostrate. Peristome small ; teeth short, linear-lanceolate,
strongly and distantly articulate ; segments very short, imperfect
; cilia none. Annulus very narrow.
1. P. filiforme, Hedw. Plants widely cespitose, appressed,
bright or yellowish green ; branches and branchlets prostrate all
in one direction, filiform and flagelliform : leaves concave,
appressed and imbricate when dry, narrowly reflexed on the
borders, serrate at the apex ; costa simple, ascending to the
middle, or shorter and bipartite ; cells of the basilar angles few,
not chlorophyllose ; perichætial leaves pale, thin, the inner
oblong, short-acuminate, minutely serrate at the apex, costate
at base. — Muse. Frond, iv. 18, t. 7 ; Bryol. Eur. t. 466 ; Sulliv.
Mosses of U. States, 105. Neckera fiUfwmis, Muell. Syn.
ii. 89.
Var. c r is ta tum . Leaves cristate-serrate at the apex; costa
stronger, ascending higher. — Leptohymenium cristatum,
Hampe, Linnæa, xxx. 459.
Var. m in u s. Leaves obscurely papillose, scarcely dentate
at the apex ; costa short, basilar, scarcely distinct ; segments as
long as the teeth.
H a b . Roots o f trees o r shaded rocks; Northern States and Canada;
var. cristatum in California (Bolander, Bauer) ; the last iu the Adirondack
Mountains, on rocks (Lesquereux).
The description refers to the very common European form, which is,
however, rare in America, but is replaced by a number of varieties not
distinct enough to authorize specific separation.
n o . PTEROGONIUM, Swartz. (PI. 6.)
Primary stems very slender, with few distant pale leaves, the
secondary robust, in dense wide divisions ; branches and branchlets
curved to one side. Leaves crowded, spreading when
moist, imbricate when dry, broadly ovate or obovate-acuminate,
serrulate, scarious, glossy ; costa flat, bipartite, vanishing below
the middle ; cells of nearly the whole base obliquely oval, those
of the middle and top linear-fusiform, all very small and
smooth. Flowers dioecious. Calyptra cucullate, with a few