643 
MUSCI. (MOSSES.) 
3. Bruchia. Calyptra mitriform. Capsule with an apophysis. 
* * Regularly ruptured. 
4. Andrjea. Capsule dehiscent by 4 longitudinal slits. 
§ 2. Capsule with a lid. 
* Gymnostomi. — Mouth of the capsule naked. 
■*- Capsule sessile on a stalk-like vaginula. 
5. Sphagnum. Calyptra irregularly tom, persistent. (Pallid plants.) 
Capsule on a proper pedicel: vaginula not stalk-like. 
6. Gymnostomum. Calyptra cuculliform. Antheridia terminal. 
7. Pottia. Calyptra cuculliform. Antheridia axillary. 
8. Aphanoriiegma. Calyptra mitriform. Antheridia axillary. 
10. Physcomitrium. Calyptra mitriform. Antheridia terminal. 
15. Hedwigia. Calyptra cortical. Antheridia axillary. 
* * Odontostomi. — Mouth of the capsule with teeth. 
■*- Peristome single ; the teeth 4-64. 
Teeth 4. 
19. Tetraphis. Calyptra mitriform. Lid conical. 
++• ■«* Teeth 16. Calyptra mitriform. 
11. Splachnum. Teeth in pairs, reflexed when dry. 
13. Grimmia. Teeth entire, sieve-like, or 3-cleft at the apex. 
14. Racomitrium. Teeth filiform, 2-3-parted to the base. 
27. Conomitrium. Teeth truncate, very short, irregularly divided or 
perforated. 
-M- -M- ++ Teeth 16. Calyptra cuculliform. 
34. Conostomum. Teeth united at the apex. 
23. Trematodon. Teeth entire or split. Apophysis very long. 
12. Weissia. Teeth entire, lanceolate, slaminidia terminal. 
18. Drummondia. Teeth entire, truncate, very short. 
24. Dicranum. Teeth split halfway down into equal parallel lobes. 
25. Leucobryum. Teeth split halfway into equal divergent lobes. 
26. Fissidens. Teeth split halfway into unequal divergent lobes. 
22. Ceratodon. Teeth split to the base into equal parallel divisions. 
++• -M- -M- ++• Teeth 32. 
20. Trichostomum. Teeth free at the apex, filiform, in pairs, erect. 
21. Barbula. Teeth free at the apex, filiform, spirally twisted. 
28. Atrichum. Teeth as in No. 30: calyptra spinulose at the summit. 
29. Pogonatum. Teeth adherent as in No. 30: calyptra densely 
hairy. 
++. +++++♦- ++ Teeth 64. 
30. Polytrichum. Teeth adherent to the expanded top of the col¬ 
umella : calyptra densely hairy. 
•+- — Peristome double ; the teeth 16. 
++Capsule symmetrical, erect: inner peristome of 16 cilia. 
16. Encalypta. Calyptra mitriform, smooth, very large. 
