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67. H. ag g reg a tum , Mitt. Primary stems creeping;
branches erect, closely aggregated, simple, curved, attenuate :
lower leaves spreading, broadly hastate, ovate-acuminate, sub-
ecostate ; those on the middle of the branches broadly ovate ;
those near the top costate-acuminato, subjulaceous, imbrioate,
serrulate toward the acute apex, the medial nerve prominent ;
perichætial leaves ovate-lanoeolate, acuminate, nerved to the
middle, serrate and reflexed at the apex: capsule cylindrical,
irregular, inclined; operculum conical, acuminate; segments
narrow; cilia solitary, half as long as the segments. — Journ.
Linn. Soc. viii. 35, t. 6.
H a b . Vancouver Island (Lyall) ; British Columbia (Douglas).
The author compares it, on account of the julaceous imbrication of the
leaves, to some states of Pterogonium gracile, while other stems with less
imbricated leaves have a resemblance to H. myurum.
68. H. ap lo clad um, Mitt. 1. c. Stems procumbent, radiculose,
curved downward at the summit; branches few, nearly
simple, often attenuate, recurved at the apex : leaves spreading,
cuspidate, imbricate, on the upper part of the branches ovate,
acute, very entire, costate to below the point; those at the top
of the branches broader, more obtuse, serrulate ; alar cells round-
quadrate, obscure, the upper oblong; perichætial leaves long,
erect, ovate-lanceolate, aouminate, nerved to above the middle,
serrulate at the apex : capsule suberect, oval-cylindrical ;. operculum
convex, acuminate ; pedicel long, nearly smooth.
H a b . Northwest coast of America (Douglas).
Mitten states that it is not unlike B. acuminatum, Beauv., but that the
leaves are quite smooth and the habit appears to be different. The roughness
of the pedicel is so slight that it is seen only when specially sought.
69. H. len tum , Mitt. Dioeoious : leaves spreading, loosely
imbrioate, cuspidate-imbricate at the top of the branches, the
lower broader and shorter, in the middle ovate and short-
acuminate, those of the branchlets ovate-lanceolate or at the
apex broader and more obtuse, narrowly serrulate, costate to
above the middle ; cells at the basal angles broader, mixed with
narrow ones, and with thiekisli walls, the upper narrow ; perichætial
leaves ecostate, clasping at base, serrulate, recurved,
entile at the apex: capsule oval-cylindrioal, suberect, irregular;
pedicel rough ; segments solid, with single cilia equalling them
in length ; membrane produced to one-third the length of the
teeth. — Journ. Linn. Soo. viii. 36.
Hab. Northwest coast of America (Douglas).
Differs from H. aplocladum in its rough pedicel and broader leaves, the
perichætial spreading. A few fragments of this species only have been
seen. It appears to be about the size of the common H. myurum. The
scabrous seta of this moss may be considered a new feature in the sub-
genus to which it is here referred, but after consideration of the eliaracters
which constitute the group Isothecium, it becomes evident tliat it cannot
be defined distinctly from the groups Brachythecium and Scleropodium
of Schimper. — (Mitten. )
SuBGENus XI. EURHYNCHIUM. (PI. 6.)
Plants more or less distinctly pinnate-ramulose. Leaves
open, rarely subsecund, cordate at base and decurrent, broadly
ovate or oblong, aouminate, serrate all around, costate, subscarious,
rarely soft ; cells smooth, or slightly papillose in some
American species, narrowly rhomhoidal, subvermioular, enlarged
at the basal angles. Perichætial bud rooting. Calyptra fugacious.
Capsule on a rough or smooth pedicel, cernuous or
horizontal, oval-oblong. Operculum more or less long-rostrate.
Peristome of Brachythecium. Annulus compound, rarely none.
— Eurhynchium, Schimp.
* Leaves narrowly areolate, glossy, striate.
■!r- Pedicel smooth ; flowers monoecious or pseudo-monoecious.
70. H. str ig o sum , Hoffm. In loose flat mats or in dense
inflated tufts; primary stems creeping, stoloniferous, with distant
leaves, the secondary prostrate or erect, ramulose ; branchlets
gradually attenuate, sometimes flagelliform: leaves open,
ovate or triangular-lanceolate upon the branchlets and gradually
narrowly acuminate, those of the small branchlets short and
less acute, or blunt at the apex ; paraphyllia small, round-ovate ;
cells narrowly rhomhoidal, the alar oval-quadrate and larger:
flowers pseudo-monoecious; annual buds of male flowers, containing
antheridia without paraphyses, adhering to the radicles
of fertile plants; perichætial leaves abruptly narrowed into a
long filiform flexuous point, with a thin costa or ecostate : capsule
cernuous and subhorizontal, oval-ohlong or subcylindrical,
broadly annulate; operculum rostrate, convex at base; teeth
narrowly lamellose inside ; cilia two, slender, not appendiculate,
a little shorter than the segments. — Deutschl. FL ii. 76. H.