* Plants small, tawny yellow: capsule short-pedicellate, enlarged
at the orifice when dry ; teeth very hygroscopic,
radiate-spreading when dry.
1. D. fulvellum. Smith. Monoecious: densely puhdnate ;
stems slender, 1 c. ni. long : leaves falcate-secund, concave,
oblono- at base, subulate-canaliculate to the obscurely serrulate
apex; costa percurrent; perichætial leaves sheathing to the
middle, lanceolate, long setaceous-tubulose above : capsule
small, ovate-oblong, erect or slightly cernuous, with a short
equal collum, smooth, constricted under the broad orifice when
dry; lid obliquely short-beaked; teeth split into two unequal
long-subulate segments ; annulus double. — FI. Brit. iii. 1209 ;
Schimp. Syn. 77 ; Braithw. 1. c. 141, t. 19, G. Arctoa fulvella,
Bryol. Eur. t. 86 ; Sulliv. Mosses of IT. States, 19.
Ha b . On wet black soil in alpine regions, and in fissures of rocks;
highest mountains of New England and New York.
* * Plants larger, many times dichotomous, prostrate at hase :
leaves close, falcate : capsule cernuous with strumose collum:
flowers monoecious.
2. D. S ta rk ii, Web. & Mohr. Plants green, cespitose:
leaves setaceous-subulate from an ovate-lanceolate base, entire,
falcate-secund, críspate when dry ; cells of the areolation linear
nearly to the base, square-inflated at the angles : capsule oylin-
drical-oblong, more or less arcuate, obscurely striate ; lid subulate,
long-beaked; annulus double, large. — Bot. Tasoh. 189;
Bryol. Eur. t. 64 ; Braithw. Brit. Moss-Fl. i. 144, t. 20, C.
H a b . Alpine regions, in fissures of rocks and on the ground; White
Mountains (Oakes, James); Eocky Mountains (Drummond, Muse. Am.
n. 83).
3. D. fa lc a tum , Hedw. Differs from the last in its more
compact growth, the leaves more regularly and strongly falcate,
dark green passing to black, obscurely denticulate at the apex,
not críspate when dry, with alar cells smaller and scarcely or
not at all inflated: the capsule is shorter, thick, inflated or
gibbous, not striate, with a shorter pedicel; peristome dark
purple; annulus simple, narrower. — Sp. Muso. 150, t. 82;
Bryol. Eur. t. 65 ; Braithw. 1. c. 143, t. 20, B.
Hab. Same as the preceding.
4. D. Bljrttii, Bruch & Schimp. Tufts loose, dusky green ;
stems erect, divided into fragile slender branches : leaves erect
at base, spreading, flexuous or subsecund above, lanceolate-
subulate, entire, shorter and narrower than in the two precedmg
species, very thinly costate ; alar cells large, inflated ; perichætial
leaves long-sheathing, shorter pointed : capsule smaller,
cernuous or incurved, not gibbous but strumose, smooth ; teeth
of the peristome narrower : male flowers near the base of the
innovations, not close to the perichætium as in both the preceding
species. — Bryol. Eur. t. 63. P . Schisti, Lindb.
Hab. Same as the precedmg.
# * * Plants cespitose, tomentose : areolation inflated at the
basal angles : flowers dioecious ; perichætium sheathing :
capsule erect, long-ovate with a short equal collum ; pedicel
pale, twisted to the left when dry ; teeth narrower.
5. D. s tric tum , Schleich. Plants pale or yellowish green :
leaves rigid, very brittle, lanceolate-subulate, canaliculate above ;
alar cells very large, orange : teeth dark-orange, irregularly
bifid ; annulus very narrow. — Schwægr. Suppl. 1. 188, t. 43 ;
Bryol. Eur. t. 66.
Hab. Decayed trunks; Lake Superior (Agassiz); Little Slave Lake
(Macoun) ; Fort Colville (Lyall) ; Northwestern Montana, and on Kettle
River and at Spokan Falls, Washington Territory ( Watson) ; mountains
of California (Bolander).
6. D. m o n tan um , Hedw. Plants densely and widely
cespitose: leaves soft, spreading or slightly secund, críspate
when dry, lanceolate-subulate, concave, serrulate, slightly papillose
on the back and green above, pale, smooth and loosely
areolate in the lower part ; alar cells small, tawny ; perichætial
leaves abruptly subulate: capsule pale, obscurely striate;
annulus rather large. — Sp. Muse. 143, t. 35 ; Bryol. Eur. t. 67.
Hab. On decaying trunks, northern and mountain regions ; rare.
7. D. v irid e , Schimp. Plants pulvinate and cespitose :
leaves brittle, open-erect, lanceolate-subulate, canaliculate, thick-
costate ; areolation rectangular, short in the upper part, larger
and hyaline from the middle downward, brown at the angles ;
perichætial leaves abruptly subulate : capsule oblong, erect
or slightly curved. — Bryol. Eur. Suppl. Picranum,, 1, t. 1.
Campylopus viridis, Sulliv. & Lesq. Muse. Bor.-Am. n. /2;
Sulliv. Mosses of IT. States, 103, and Icon. Muse. 80, t. 18.
Ha b . Trunks of prostrate trees in dense woods ; not rare in the Northern
States, but not yet found in fruit.