iiJ
144. D. capiUaceum, var. subuUfolium, Bruch & Schimp.
Bryol. Eur. t. 435, in part (¡î 1, 2, 2a).
H a b . In valley rivulets, Pennsylvania and the Northwest; not rare.
4. D. p a lle sc en s, Bruch & Schimp. Resembling the last
in its long perichætium, but differing from it in its pale green
color, the shorter and less divided stems, the shorter wider
more complicate-carinate nearly entire and closely areolate
leaves, the costa percurrent or vanishing below the apex, and
the cilia simple, narrower, and not barred. — Bryol. Eur. under
t. 436 ; Schimp. Corol. 97. D. capillaceum, Myrin, 1. c. t. 7 ;
Bryol. Eur. t. 435, excl. var.
H a b . Eocky Mountains {Drummond) ; stagnant pools, New England
{Ingraham) ; Pennsylvania and Nova Scotia {James).
5. D. su b u la tum , Myrin, 1. c. Tufts long, pale, loose;
stems slender, flaccid, pinnately divided into short open unequal
branches : stem-leaves open, distant, loosely imbricated, slightly
secund, lanceolate, plicate-concave, denticulate at the apex;
costa narrow, vanishing below the apex; perichætial leaves
imbricate, long-lanceolate, ecostate, very entire : calyptra short,
cucullate, covering the lid only: capsule oval, immersed; lid
convex, obliquely rostellate; teeth short, lanceolate, split open,
minutely punctulate, saffron color ; cilia thin, much longer than
the teeth, nodose and appendiculate below, trabeculate and
united at the apex only, smooth, reddish brown. — Bryol. Eur.
t. 434. Fontinalis subulata, Beauv. Prodr. 58. Neckera subulata,
Muell. Syn. ii. 145.
H a b . Georgia (Beauvois); Louisiana {Drummond) ; Arkansas {Engel-
mann).
‘6. D. cy lin d ric a rp um , Aust. Stem-leaves lanceolate-
subulate, twisted, falcate, very entire or serrulate at the apex
only ; costa round, long-excurrent ; perichætial leaves somewhat
twisted, obtuse : capsule cylindrical, yellowish, exserted on a
pedicel two c.m. long, somewhat irregular and slightly costate
when dry ; lid conical, acute ; teeth long, solid, opaque, papillose
; cilia slightly longer, cancellate their whole length, papillose.—
Coult. Bot. Gaz. ii. 111.
H a b . Oregon [Mrs. Jessie Boy).
The author compares it with D. uncinatum, from which It is distinguished
by tlie capsule twice as long and much longer pedicelled, the outer
peristome longer and papiUose, the stem-leaves with the costa more distinctly
excurrent into a narrower more acute terete point, etc.
7. D. S w a rtz ii, Lindb. Ms. With the habit of D. capillaceum,
but more robust : upper leaves of the branches hooked,
the others variously secund, all densely crowded, obscurely three-
ranked, glossy, lanceolate at base, gradually narrowed into a
very long flat acumen, acutely serrate at the apex, distantly
denticulate below ; costa vanishing below the point : fruit
unknown. — Schimp. Syn. 461. Hypnum fluitans, y ax. serratum,
Lindb. ; Hartm. Skand. FL, ed. 9, 18. H. exannulatum,
Guemb., vars. immersum and Cochleae, Austin, 1. c. 143.
H a b . Pools of stagnant water, New Jersey {Austin); California {Bolander,
Brewer).
Tlie species resembles Ilypnum fluitans, and has been considered hy
Schimper as probably a variety of that species. It is distinct, however,
in the narrow cells of the leaves, the two basilar rows much longer and
somewhat broader, and in the denticulation entirely surrounding the leaf.
The species is evidently dicecious. The male plants received from California
are covered with large polyphyllous flowers, with the perigonial
leaves broadly ovate, concave, and narrowed into a long slender flexuous
nearly entire point.
S e r i e s III. PLEUROCARPI.
Fruit lateral by the position of the flowers of both kinds,
placed in the axils of leaves, either upon the primary stems or
upon branches.
T r i b e XXIX. NECKEREÆ.
Primary stems creeping, generally defoliate ; the secondary
erect or pendent, dichotomous or fasciculately or pinnately
ramulose. Leaves spreading, generally large, smooth, rarely
obscurely papillose, minutely areolate ; upper cells rhomhoidal,
or short-linear in oblique rows, the lower long-linear, angular or
minutely quadrate. Fruit on perichætial branchlets without
rootlets at base. Calyptra conical or ououllate, naked or hairy.
Capsule generally immersed in the long imbricate perichætium,
erect, symmetrical, rarely curved. Peristome simple or double,
very rarely none.
102. C R Y PHÆ A , Mohr. (PL 5.)
Secondary stems more or less regularly pinnate or bipinnate.
Leaves spreading when moist, imbricate when dry, ovate, aou