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** Capsule pedicellate; vaginula sessile. a. Capsule cylindrical ; lid with a straight beak; calyptra mitriform. 29. ENCALYPTA (partly). Calyptra very large, entirely cover
ing the capsule, subulato-cylindrical.
b. Capsule oval ; lid obliquely rostrate; calyptra dimidiate. 5. GYMNOSTOMUM. Perennial ; leaves of close firm texture. 21. POTTIA. Annual, or biennial ; leaves rather succulent, with
c. Capsule roundish-pyriform ; lid obliquely rostrate. 12. STYLOSTEGIUM. Capsule subexserted; columella adhering
to the lid; perennial ; leaves channelled, secund. 11. ANODUS. Capsule pedicellate ; columella free; annual, or
biennial ; leaves setaceous, erect.
d. Capsule obovate, or clavato; lid plane, or conical ; leaves loosely reticu
† Calyptra mitriform. 71. SCHISTOSTEGA. Leaves vertically distichous, nerveless;
calyptra very small. 69. PHYSCOMITRIUM. Leaves spreading every way, nerved,
acute; calyptra large, inflated below; barren flower discoid.
tt Calyptra dimidiate. 70. OEDIPODIUM. Leaves succulent, broad, obtuse; capsule with
a long tapering apophysis resembling a fruitstalk.
e. Capsule globose; lid almost plane.
† Calyptra conico-mitriform, small; leaves nerveless. 30. HEDWIGIA. Barren flower axillary; capsule subsessile, im
mersed. 31. HEDWIGIDIUM. Barren flower terminal ; stem stoloniferous;
leaves plicato-striate; capsule shortly pedicellate, subexerted.
ff Calyptra dimidiate ; leaves nerved. 61. BARTRAMIDULA. Capsule on a long pedicel, drooping;
Division II. Peristome single.
SUBDIVISION I. Calyptra mitriform.
† Calyptra plicato-striate.
a. Teeth 4. 39. TETRAPHIS. Perennial, caulescent, cæspitose. 40. TETRODONTIUM. Annual, stem none, gregarious ; leaves few,
b. Teeth 16, equidistant. 36. PTYCHOMITRIUM. Teeth bifid ; calyptra subulato-mitriform,
shorter than the capsule.
c. Teeth 16, in pairs. 35. GLYPHOMITRIUM. Calyptra ventricose, entirely covering
the roundish capsule, contracted at the base. 37. ORTHOTRICHUM (partly). Calyptra campanulate, not con
tracted at the base, nearly covering the oblong or obovate capsule.
tt Calyptra smooth, not plicate.
a. Teeth 16, equidistant.
Perennial, caulescent, cæspitose. 29. ENCALYPTA (partly). Calyptra large, subulato-cylindrical,
entirely covering the capsule. 32. SCHISTIDIUM. Calyptra small, conico-mitriform; capsule
immersed, subsessile ; columella adhering to the deciduous
lid. 33. GRIMMIA. Calyptra as in the last (in a few instances sub
dimidiate); capsule pedicellate; columella free; lid rostel
late. 34. RACOMITRIUM. Calyptra larger, subulato-mitriform, the
subulate part solid and subpapillose; capsule oblong; lid subulate, straight; leaves with sinuous areolæ.
11 Annual or biennial, gregarious; leaves setaceous. 8 CAMPYLOSTELIUM. Calyptra conico-subulate, small; capsule
oblong, smooth; fruitstalk geniculate. 9. BRACHYODUS. Calyptra conico-submitriform; capsule stri
ated, on a straight fruitstalk; teeth very short, truncate.
B. Teeth 16, in pairs, plane, reflexed when dry. 66. SPLACHNUM. Calyptra conico-mitriform, small; capsule
7. Peristome a conical plicated membrane. 42. DIPHYSCIUM. Calyptra small, conical ; capsule very large,
SUBDIVISION II. Calyptra dimidiate. a. Calyptra inflered at the base, at first conico-mitriform; capsule clavato
pyriform; teeth 16, plane, more or less paired, marked with a medial line ;
leaves loosely reticulated as in SPLACHNUM. 69. DISSODON. Barren flower gemmiform ; leaves obtuse, en
tire; teeth incurved when dry (equidistant in D. splach
noides). 68. TayloRIA. Barren flower capituliform ; leaves acuminate,
serrated; teeth reflexed when dry,
b. Calyptra not inflered at the base, dimidiate.
* Teeth in 8 pairs, reflexed when dry. 67. TETRAPLODON. Capsule oval, with a distinct apophysis ;
leaves loosely reticulated, acuminate. 38. ZYGODON (partly). Capsule clavato-pyriform, furrowed ;
leaves minutely dotted.
** Teeth 16, equidistant, simple, or nearly so.
I Capsule pyriform, or oval, erect or inclined. 59. EntOSTHODON. Capsule pyriform-obovate, erect; calyptra
inflated below, large; leaves loosely reticulated. 54. MIELICHHOFERIA. Capsule pyriform, inclined; calyptra
small, not inflated ; leaves as in Bryum. (Cladocarpous.) 13. BLINDIA. Capsule turbinate, erect; calyptra angular at the
base; fruitstalk short; leaves as in DICRANUM ; perennial,
cæspitose. 10. SELIGERIA. Capsule roundish-pyriform, smooth ; calyptra
small ; leaves setaceous; stems annual or biennial, gre
garious. 9. BRACHYODUS. Capsule oval, erect, striated ; teeth very short,
truncate; (calyptra submitriform ;) leaves setaceous; stems annual or biennial, gregarious.
7. RAABDOWEISSIA. Capsule oval, striated, wide-mouthed ;
teeth lanceolate ; leaves channelled, lax ; stems perennial,
cæspitose. 6. WEISSIA. Capsule oval or oblong, smooth; teeth lanceo
late; leaves of close texture; stems perennial, cæspitose. 22. ANACALYPTA. Capsule as in the last; leaves rather succu
lent, with lax areolæ, as in POTTIA ; stem annual or biennial.
+1 Capsule globosc, nearly horizontal. 65. DISCELIUM. Stem scarcely any, annual, gregarious ; leaves
minute, few, reticulated. 64. CATOSCOPICM. Stems perennial, cæspitose ; leaves nume
rous, of firm texture, nerved. 63. ConosTOMUM. Stems as in the last; teeth united at the
summit into a cone; habit as in BARTRAMIA.
*** Teeth 16, deeply bifid, equidistant.
# Capsule erect, symmetrical. 23. DESMATODON. Capsule oval, or oblong; lid rostellate ;
leaves of soft texture, broad, papillose at the back; stem perennial.
11 Capsule suberect, rather unequal. 15. CYNODONTIUM. Capsule smooth, pyriform-obovate, un
equal; lid rostrate; teeth connivent, irregular, fragile;
leaves of firm texture; stem perennial. 14. ARCTOA. Capsule striated, when dry contracted below
the wide mouth; fruitstalk short; teeth plane, not evi. dently barred; leaves as in DICRANUM.
111 Capsule cernuous or inclined, unequal. 16. DICRANUM. Capsule mostly cernuous, smooth or striated;
lid rostrate; fruitstalk long; teeth distinctly barred;
leaves of close texture, nerved, more or less secund. 17. LEUCOBRYUM. Capsule, lid, and peristome, as in DICRANUM ;
leares spongy, composed of a double layer of loose cellu
lar tissue : nerve indistinct. 72. Fissidens. Teeth with divergent geniculate segments;
leaves vertically distichous. (Some of the species are cladocarpous.)
18. CERATODON. Capsule subcylindrical, unequal; lid short,
conical; teeth cloven almost to the base, the segments connected by trabeculæ, composed of two differently coloured laminæ.
#711 Capsule on an arcuate fruitstalk. 20. CAMPYLOPUS. Capsule striated, unequal; fruitstalk arcu
ate; calyptra fringed at the base; nerve of the leaf broad. 19. DICRANODONTIUM. Capsule smooth, symmetrical; fruit
stalk arcuate; calyptra not fringed at the base.
**** Teeth 32, in pairs, narrow or filiform. 25. DIDYMODON. Capsule oblong, symmetrical, erect; teeth
very fragile and irregular. Habit of TRICHOSTOMUM. 26. TRICHOSTOMUM. Capsule as in the last; teeth persistent,
filiform, erect or inclined, composed of a single layer of
cellules. 24. DISTICHIUM. Capsule as in the preceding; teeth filiform ;
leaves distichous, setaceous from the sheathing base. 27. TORTULA. Capsule oblong, erect; teeth contorted, com
posed of a double layer of differently coloured cellules. 28. CINCLIDOTUS. Capsule immersed or shortly pedicellate;
teeth contorted, anastomosing at the base.
***** Teeth 32 or 64, equidistant, short, obtuse, connected at their apices by
a tympanum formed of the dilated apex of the columella ; nerve of the leaf covered with vertical lamella.
† Capsule not angular ; teeth 32. 43. ATRICHUM. Calyptra almost naked; columella round;
leaves much crisped when dry, not sheathing at the base ;
lamelle few; nerve narrow. 44. OLIGOTRICHUM. Calyptra slightly setose at the apex; co
lumella winged; leaves firmer, sheathing at the base;
nerve wider; lamellæ more numerous. 45. POGONATUM. Calyptra very hairy; capsule without angles,
scarcely strumose ; leaves rigid, densely lamellated; nerve thick and broad.
1 Capsule angular ; teeth 64, rarely 32. 46. POLYTRICHUM. Calyptra very hairy; capsule angular, with
a distinct struma at the base ; leaves as in the last.