608 MUSCI. (MOSSES.) 



Artificial Analysis of the Genera. 



I. ACROCARPI. Fruit terminal. 



A. Capsule without a deciduous operculum. 



* Capsule dehiscing by irregular ruptures. 

 8. ARCHIDITJM. Calyptra torn irregularly at the middle 

 6. BRUCHIA. Calyptra circumcissile at the base. Capsule apophysate. 

 4. PHASCUM. Calyptra circumcissile at the base. Capsule not apophysate. 



* * Capsule dehiscing by 4 longitudinal slits. 

 2. ANDRJEA. Capsule sessile on a pedicellate vaginula. 



B. Capsule dehiscing by a deciduous operculum. 



* Mouth of the capsule naked 

 t~ Capsule sessile on a pedicellate vaginula. 

 1. SPHAGNUM. Calyptra irregularly torn, persistent. 



- i- Capsule on a proper pedicel : vaginula not pedicellate. 

 G. GTMNOSTOMUM. Calyptra cuculliform Antheridia terminal. 



25. POTTIA. Calyptra cuculliform. Antheridia axillary. 



66. APHANORHEGMA. Calyptra mitriform. Antheridia axillary. 

 66. PHYSCOMITR1UM. Calyptra mitriform Antheridia terminal. 

 40 HEDWIGIA. Calyptra conic Antheridia axillary. 



* * Mouth of the capsule furnished with teeth. 



i- Peristome single. 

 H- Teeth of the peristome 4. 



26. TETRAPHIS. Calyptra mitriform Plants with a conspicuous stem. 



27. TETRODONTIUM. Calyptra dimidiate-mitriform. Almost stemless plants. 



H- -H- Teeth of the peristome. 16. Calyptra mitriform. 



a. Calyptra plicate 



85. PTYCHOMITRIUM. Teeth deeply bifid ; their segments adherent. 

 88. COSCINODON. Teeth cribrose. 



b. Calyptra not plica.*,. 



37. GRIMMIA. Teeth entire, cribrose or 2 -3 cleft at the apex. 

 36. SCH ISTIDIUM. Teeth as in No 37 Columella adherent to the operculum. 

 39. RAOOMITHIUM. Teeth filiform, 2-3-cleft to the base. 

 57. SPLACHNUM. Teeth in pairs, reflexed when dry. 

 18. CONOMITRIUM. Teeth truncate, very short, more or less perforated. 

 H- -H- -H- Teeth of the peristome 16. Calyptra cuculliform. 



a. Leaves 2-ranked 



17. FISSIDENS. Teeth cloven half-way into two unequal segments 

 24. EUSTICIITUM. Fruit unknown. 

 23. DISTICIIIUM Teeth usually entire ; if cloven, their segments equal. 



b Leaves spreading every way. 

 1. Capsule cernuous-iuclined, unequal. 



14. DICRANUM. Teeth as in Fissidens Leaves furnished with a costa. 

 16 LEUCOBRYUM. Teeth as in Fissidens Leaves destitute of a costa. 



15. CERATODON. Teeth deeply bifid Capsule with a short struma. 



12. TREMATODON. Teeth cleft below. Capsule with a long and linear apophysis. 

 62. CONOSTOMUM. Teeth united at the apex. Capsule ribbed 



2. Capsule somewhat pendulous on an arcuate pedicel, equal. 

 13 CAMPYLOPUS. Teeth deeply bifid. Calyptra fringed at the base. 

 11. DICRANODONTIUM. Teeth deeply bifid. Calyptra not fringed at the base. 



