608 Musci. (mosses.) 



Artificial Analysis of the Genera. 



I. ACROCARPI. Fruit terminal. 



A. Capsule without a deciduous operculum 

 * Capsule dehiscing by irregular ruptures. 

 8. ARCIIIDIUM. Calyptra torn irregularly at the middle 

 6- BRDCHIA. Calyptra circumcissile at the base. Capsule apophysate. 

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



* * Capsule dehiscing by 4 longitudinal slits. 

 2. ANDR2EA. Capsule sessile on a pedicellate vaginula. 



B. Capsule dehiscing by a deciduous operculum. 

 * Mouth of the capsule naked 

 +- Capsule sessile on a pedicellate vaginula 

 1. SPHAGNUM. Calyptra irregularly torn, persistent. 



■>- -<- Capsule on a proper pedicel : vaginula not pedicellate. 

 6. GYMNOSTOMUM. Calyptra cuculliform Antheridia terminal. 



25. POTTIA. Calyptra cuculliform. Antheridia axillary. 



56. APIIANORIIEGMA. Calyptra mitriform Antheridia axillary. 

 65. PIIYSCOM1TRIUM Calyptra mitriform Antheridia terminal. 

 40 HED 1 IY1GIA. Calyptra conic Antheridia axillary. 



* * Mouth of the capsule furnished with teeth. 



+- Peristome single. 



** Teeth of the peristome 4 



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



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



++ ++ Teeth of the peristome 16. Calyptra mitriform. 

 a. Calyptra plicate 



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



38. COSCINODON. Teeth cribrose. 



b. Calyptra not plica,*,. 



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



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



39. RACOMITRIUM. 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. 

 ++ ++ ++ Teeth of the peristome 16. Calyptra cuculliform. 

 a. Leaves 2-ranked 

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

 24. EUSTICIIIUM. Fruit unknown. 



23. P/ISTICHIUM Teeth usually entire ; if cloven, their segments equal. 



6 Leaves spreading ever} - way. 

 1. Capsule cernuous-inclined, 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. 



