truncate, teeth long and tapering from a lanceolate base, cleft half-way into unequal segments, geniculate, barred; fruit in some species cladocarpous, leaves vertically distichous.
135.
Ceratodon (18). Caps. sub-cylindrical unequal, with a short ventricose or strumose neck; teeth deeply cleft, or of two equal subulate portions connected below by prominent trabeculæ, of two differently coloured laminæ, the outer red, the inner and broader yellow. 49.
[double dagger][double dagger][double dagger][double dagger] Capsule on an arcuate seta.
Campylopus (20). Caps. oval or oblong, regular or gibbous on upper side, tapering at base, striated, lid conico-subulate or rostrate, teeth deeply bifid; calyptra large, fringed at base; leaves with a broad nerve. 50.
Dicranodontium (19). Caps. elliptical smooth, teeth linear-lanceolate, cleft nearly to base into unequal portions, obliquely striate; calyptra not fringed at base. 49.
- * * * Teeth 32, in pairs, narrow or filiform.
Didymodon (25). Caps. erect, sub-cylindrical, teeth 32 (16 Wilson) linear-lanceolate, not obviously united by a basilar membrane, tender and fugacious, entire or perforate. 58.
Trichostomum (26). Caps. erect, sub-cylindrical or oval, smooth, teeth 32 in unequal pairs (often so united as to appear 16 simple or perforate teeth), connected by a narrow basilar membrane, persistent. 60.
