396 
TV. MUSCI. 
a. Capsule erect 0 " nearly so, not globose. Teeth 8, 2 -fid, or 16 equidistant, or 32 in 
pairs, rarely in fours, then short, broad. 
f Cells of leaf large, lax. 
Teeth erect, when dry 43. Entosthodon 
Teeth recurved when dry 45. Eremodon. 
tt Cells of leaf minute. 
Teeth recurved when dry. Capsule grooved 30. Zygodon. 
Teeth erect or recurved when dry. Capsule not grooved. Peri- 
chsetial leaves short 5. Weissia. 
Teeth incurved when dry. Capsule not grooved. Perichmtial 
leaves very long, sheathing the fruitstalk 6. Symblepharis. 
/3. Capsule globose, inclined ; mouth small ; teeth 1 6, united by their tips. 
Leaves subulate, serrate 39. Conostomum. 
y. Fruitstalk long and slender. Capsule erect or nearly so, narrow ovoid- oblong or cylin- 
drical, rarely slightly curved, quite equal at the base. Teeth 16, 2-3 -fid, or 32 in 
pairs, slender, erect or incurved when dry. 
Leaves broad, soft, papillose at the back ; nerve very thick. Teeth 
16, 2-3-fid 18. Desmatodon. 
Leaves narrow. Teeth 16 or 32, lanceolate, entire 2-fid or perfo- 
rate, fragile, irregular 17. Didymodon. 
Leaves narrow, distichous. Teeth 16, equidistant 19. Distichium. 
Leaves narrow. Teeth 16, perforated, or 32 in pairs, slender, 
erect, of one series of cells 15. Trichostomum. 
Leaves broad or narrow. Teeth 32, slender, twisted, of two series 
of cells 16. Tortula. 
5. Fruitstalk long or short. Capsule inclined cernuous or pendulous, more or less curved 
and unequal at the base. Teeth 16, equidistant, 2-fid, or 32 in pairs. 
f Fruitstalk erect. Calyptra not f tinged at the base. 
Stems creeping. Fruitstalk clothed with long perichsetial leaves. 
Teeth 16, 2-fid 9. Picnemon. 
Stems erect. 
Teeth 32, united by trabeculae 20. Cekatodon. 
Teeth 16, 2-fid. Leaves thick, white, spongy 10. Leucobryum. 
Teeth 16, 2-fid. Leaves of ordinary texture 11. Dicranuh. 
ft Fruitstalk curved or flexuose. 
Capsule ovoid, furrowed. Calyptra fringed at the base. Teeth 16, 
2-fid 13. Campylopus. 
Capsule oblong, not furrowed. Calyptra entire at the base. Teeth 
16, 2-partite 12. Dicranodontium. 
Capsule pyriform, with a long narrow struma. Calyptra inflated. 
Teeth 32, granulate 14. Trematodon. 
Capsule pyriform, with a tapering struma. Calyptra small, narrow. 
Teeth 16, connate at the base 35. Mielichoferia. 
e. Teeth 32 or 64, very short, equidistant, horny. 
Stout, erect, rigid Mosses. Leaves usually lamellate, brown or lurid 
green 46. Polytrichum. 
Division 3. Diploperistomi. — Peristome double. 
Capsule horizontal, flat above, convex below. Teeth innumerable, 
forming a filiform brush 47. Dawsonia. 
Capsule terete. Teeth short, definite in number. 
