ARTIFICIAL Al^ALYSIS 



OF THE 



GENERA OF MOSSES. 



I. ACROCARPI. Fruit terminal, 



A. Capsule without a deciduous operculum. 



» Capsule dehiscing by irregular transverse rupture. Plants very small. 



-1- Leaves nerveless. Prothallium persistent. 



1. Micromitrium. Capsule globose, nearly sessile. Calyptra min- 



ute, closely adhering. 



2. Ephemerum. Capsule globose-ovate. Calyptra campanulate. 



Leaves nerveless, except in one species. 



H- ■<- Leaves with a distinct medial nerve. Prothallium none. 



3. Physcomitrella. Caulescent. Capsule globose, apiculate. 



Calyptra campanulate. 



7. Microbryum. Stemless. Calyptra reaching the middle of the 

 capsule, phuilobate at base, splitting on one side. Leaves more 

 closely areolate, minutely papillose on the back. 



4. Sphserangium. Stemless. Capsule small, spherical, enclosed in 



a cluster of imbricate very concave or carinate leaves. 



t 5. Phascum. Caulescent. Capsule pedicellate. Calyptra cucullate. 



6. Pleuridium. Plants larger, caulescent, ramose. Capsule ovate. 

 « Calyptra cucullate. Leaves narrower, lanceolate-subulate. 



■ 8. Bruchia. Capsule apophysate, except in one species. Calyptra 

 mitriform, lobate or irregularly lacerate at base. 



9. Archidium. Capsule globose, sessile. Calyptra irregularly torn, 

 adhering. Spores remarkably large and few. 



« * Capsule dehiscing by four longitudinal slits. 



Andresea. Capsule sessile on a pedicellate vaginule. Plants 

 brittle and rigid when dry. See Order II. Andreceacece. 



B. Capsule dehiscing by a deciduous operculum. 



* Mouth of the capsule naked. 



•<- Capsule sessile on a pedicellate vaginule. 



Sphagnum. Calyptra irregularly torn, persistent. Plants soft, 

 flaccid. See Order I. 8pliajnace(B. 



