4 MUSCI. 



Table of the Genera. 

 I. Lid adnate, not separating. 



1. Andrjea. Capsule 4-valved. 



2. Phascum. Capstde entire. 



II. Lid deciduous at the maturity of the seeds, 

 1. Mouth of the capsule naked. 



3. Sphagnum. Capsule sessile, its receptacle pedunculated. 



In all the remaining Genera the capsule is supported on a 

 seta or stalk, which, however, is sometimes minute. 



4. (Edipodium. Seta fleshy, pellucid. Calyptra campanu- 

 late, splitting on one side. 



5. Gymnostomum. Seta rigid, opaque. Calyptra dimidiate. 

 Fruit terminal. 



6. Hedwigia. Seta rigid, opaque. Calyptra dimidiate. 

 Fruit lateral. 



7. Akictangium. Seta rigid, opaque. Calyptra campanu- 

 late. Fruit terminal. 



2. Mouth of the Capsule ivith a Peristome, 

 a. 



Seta terminal; f except in a few species of Dicranum,) 



t 



Peristome single. 



(Entosthodon and some Orthotricha occasionally or altogether 

 want the inner Peristome). 



8. Diphyscium. Peristome a conical, truncated, plaited mem- 

 brane. Capside oblique. 



9. Tetraphis. Peristome of 4 triangular teeth. 



10. Splachnum. Peristome of 8 or 16 pairs of teeth. Cap- 

 sule with an apophysis. 



11. Encalypta. Peristome of 1G teeth. Calyptra campa- 

 nulate, smooth, enclosing the mature capsule. 



12. Weissia. Peristome of 16 equidistant teeth. Calyptra 

 dimidiate. 



13. Grimmia. Peristome of 16 broad equidistant teeth, en- 

 tire or perforated. Calyptra campanulate. 



14. Didymodon. Peristome of 16 or 32 teeth, in pairs. Ca- 

 lyptra dimidiate. 



