il
:.î
falcate-Iingulate and striolate lengthwise when dry, and the beak
of the operculum .and the peristome shorter. — Syn. 473.
H a e . Catskill and AATiite Mountains, on overhanging rocks (James)-
PennsyIvanm (Sau).
4. H. g ra c ilis, James. Plants soft, slender, much divided,
divaricate ; branches gradually filiform and flagelliform, flexuous :
lower leaves loosely imbricate, slightly oblique, open, lingulate,
ohlong, obtuse and obtusely apiculate, those of the upper
branches more distant, erect, all with double basilar costa or
none, and entire ; perigonial leaves few, ovate-acuminate, slightly
margined by a row of longer cells : antheridia few (2 to 4), spar-
Piiraphysate : female flowers and fruit unknown. — Rep.
Reg. New York Univer. (1869), xxii. 57; Sulliv. Icon. Muse.
Suppl. 82, t. 25.
H a b . On rocks, Sand Lake, New York (F . Colvin); Adirondack
Mountains (C. H. Peck); Catskill Mountains (James); New Jersey
(Austin), with male plants.
107. METEORIUM, Brid.
Plants long, pendent from the branches of trees ; stems foliate
from the base, distantly pinnate; branches filiform, attenuated.
Leaves imbrioate-cordate, clasping; cells of the areolation long,
narrow, linear, at the base oval-quadrate and inflated. Capsule
generally short-pedicelled. Peristome as in Homalia.
1. M. pend u lum , Sulliv. Plants yellowish green ; branches
long and very slender, flexuous ; leaves open-erect, those at the
base of the branches larger and flattened, linear-lanceolate, gradually
narrowed to a long filiform point, opaque, papillose on the
back, serrulate on the slightly recurved margin, costate to the
middle ; alar cells larger, angular-ovate, the upper linear-fusiform ;
perichætial leaves small, scarcely covering the hairy vaginule,
loosely areolate ; flowers dioecious (?), the male unknown : ca!
lyptra long-conical : capsule small, oval, on a pedicel double its
length ; lid conical, obliquely short-beaked ; peristome double ;
teeth lanceolate, distantly articulate, more or less perforated and
split along the dividing line; segments from a broad basilar
membrane, slightly shorter than the teeth, linear-lanceolate,
carinate ; cilia none. — Mosses of U. States, 81, and loon. Muso
117, t. 73.
H a b . On trees and bushes, Western Louisiana ( Teinturier, Biddell).
2. M. n ig re sc en s, Mitt. Branches creeping; branchlets
long, flexnous, pinnately branching: leaves open-spreading,
undulate lengthwise, cordate at base, lanceolate, narrowly acuminate,
oostate to above the middle ; borders flat, more or less
undulate, minutely crenulate ; perichætial leaves similar, thinner
: calyptra split on one side, covered with a few hairs : capsule
short-pedicellate, broadly oval, exserted above the hairs of
the vaginule; operculum subulate.—Journ. Linn. Soc. xii. 441.
Hypnum nigrescens, Swartz, Prodr. 141. Neckera nigrescens,
Schwaegr. Suppl. ill., t. 244. Tracliypus, Mitt. 1. c. viii. 45.
H a b . Florida (Garber, J. Donnell Smith, Austin, Bussell); Lake
Huron, in fruit ( Todd) ; Canada West (Emery). The distribution of this
tropical species so far north as Canada is remarkable.
T e i b e XVIII. LEUCODONTEÆ.
Primary stems creeping, the secondary erect or pendent,
simple or branching, irregularly or suhpinnately ramulose.
Leaves close, open or secund, ovate, obovate or oblong-lanceolate,
suhscarions, solid, generally plicate lengthwise, glossy;
costa simple or double, rarely none; upper areolation rhom-
boidal or linear, the lower in rows, vermicular-linear, punctiform
at the basilar angles. Flowers dioecious; perichætium
long, sheathing. Calyptra large, dimidiate, cucullate, its base
sometimes confluent under the capsule. Capsule more or less
long-pedicellate, erect or oblique by the curve of the pedicel,
symmetrical. Peristome simple or double, more or less perfect.
108. LEUOODON, Schwaegr. (PI. 4.)
Secondary stems erect or arcuate, simple, gener.ally stoloniferous,
densely foliate. Leaves decurrent, ecostate, sulcate
lengthwise ; cells of the areolation narrowly linear-vermionlar,
the middle and basilar punctiform. Calyptra solid, cucullate,
often attached below the capsule by the connate base. Capsule
coriaceous, oval-oblong, microstome, exserted or emersed on a
short straight pedicel. Operculum conical or obliquely short-
rostrate. Peristome simple; teeth thin, distantly articulate,
2-3-cleft at the apex, papillose, whitish.