prostrate or ascending, rootless, slightly ramnlose ; branches
fastigiate, incurved at tho apex : leaves close, multiform, and
diversely curved, falcate or secund, broadly ovate or ovate-
oblong, lanceolate, more or less aouminate, acute or blunt,
sulcate, coiicavo ; costa simple or forking, ascending to the
middle ; borders entire or obscurely denticulate at the apex ;
areolation narrow, flexuous or vermicular, mucii enlarged rectangular
aud hyaline at the angles ; perigynium long aud perichætium
squarrose, the perichætial leaves ecostate and not
sulcate, lanceolate-acuminate, obtusely serrate at the apex :
capsule cernuous from a short inflated erect collum, oval or
oblong ; operculum con\’ex, mamillate ; teeth short, light orange
with a broad liyaline border; articulations distant; segments
cleft between the articulations; cilia very slender, two or three,
unequal, shorter than the segments ; ammlus lai-ge, triple. —
Wils. Bryol. Brit. 400. Hnmohimi ochraceum, Bruch &
Schimp. Bryol. Eur. t. 580. Stei'eodon ochraceus, Mitt. 1. c.
Ambhjstegium ochraceum, Lindb.
IIAU. Mountain rivulets; Pocono, Allegllany, Catskill and AVhite
Mountains; British Columbia {Lyall); Davis Strait (Taylor).
SüBGENus XXV. CALLIERGON.
Plants large, erect or procumbent, generally long and widely
cespitose, with few simple branches or suhpinnately r.amulose,
and with few radicles. Leaves large, cordate, ovate or ovate-
oblong, obtuse, deeply concave, spreading or imbricate, rarely
secund; areolation linear, narrow. Capsule oblong, incurved.
Operculum convex-conical.
* Stems more or less pinnately ramidose; leaves spreading or
loosely imbricate.
173. H. cordifolium, Hedw. Monoecious : tufts loose, soft,
green, erect or drooping ; stems flexuous, very long ; stem-leaves
cordate-ovate or broadly ovate, oblong, obtuse, long-decurrent,
soft, very entire, simply costate to near tlie apex ; cells of the
borders and of the apex very narrow, looser and rliomboidal in
the middle, those of the angles and base large, hexagonal-
rectangular with the primordial utricle distinct; iioricliætium
long, the leaves imbrioate, acuminate, costate, the inner siib-
clasping : capsule long-pedicellate, oblong-cylindrical, horizontal.
subincurved, arcnate when dry, soft, brown ; teetb pale yellow,
thin; segments entire; cilia two or three, slender, fragile;
annulus none. — Muse. Frond, iv. 97, t. 37; Bryol. Eur. t. 615.
Amblystegium cordifolium, DeNot. Briol. Ital. 136.
H a b . Prairie swamps, bogs, meadows, streams, and borders of lakes;
rare in finit.
174. H. g ig an teum , Schimp. Dioecious: much like the
last, from which it differs in its much larger size, the stem thick
and densely pinnately ramulose, the leaves larger and more
solid, the areolation more dense and vermicular, broader and
quadrate at the angles, and the inflorescence dioecious. — Syn.
642. II. cordifolium, var. stenodyction, Bruch & Schimp. 1. c.
Amblystegium giganteum, DeNot. 1. c. 135. Stereodon gigan-
teus. Mitt. 1. c.
H a b . Reported from Pennsylvania (James); AVisconsin (Lapham);
cedar swamps, New York (Austin); Canada (Macoun); Fort Colville
(Lyall).
All the specimens examined are sterile, ratlier referable as a variety to
LI. hamifolium or II. aduncum. Mitten remarks that this is the moss
distributed hy Drummond (ii. 209) as II. cordifolium, and that all American
specimens are more slender than the European.
175. H. sa rm e n to sum , Wahl. Dioecious: tufts dense,
v.'irieg.'ited or dark purple, mixed with young green stolons;
stems without radicles, long, more or less densely ramulose;
branchlets unequal, acute : leaves open, loosely imbricate wdien
dry, purple and straw-color, glossy, green only when young,
elliptical, long-ovate, obtuse and cucullate at the apex, apiculate
or not, concave ; costa simple, vanishing below the apex ; areolation
very narrow and solid, abruptly enlai’ged, inflated and
hyaline at the concave suhdecurrent angles; perichætial leaves
pale, narrowly costate, the inner subsheathing, obsoletely sulcate,
nerved : capsule cernuous or horizontally incurved, ovate-oblong,
turgid, arcuate when dry; teeth bright yelloAv; cilia two or
tliree, stout, as long as the entire segments ; annulus none. —
FI. Lapp. 380 ; Bryol. Eur. t. 616. Ambhjstegium sarmentosum,
DeNot. I. c.
H a b . Peat hogs of New England (Oaiie.i).
176. H. cu sp id a tum , Linn, Dioecious : ttifts loose, yellowish
or dirty green ; stems Avith few branches, ¡^innately
ramulose, rigid and cuspidate at the apex by the convolute
leaves : leaves crowded, erect, open, broadly ovate-oblong.