ANALYTIC KEY 



TO THE 



GENERA OF MOSSES 



ORDER I. Sphagnales. 



Capsule dehiscing by a deciduous operculum, peristome 

 none, leaves composed of large hyaline cells, with 

 intervening rows of small chlorophyllose ones. 

 Genus single Sphagnum, 12. 170. 



ORDER II. Andreaeales. 

 Capsule dehiscing by four (rarely six) longitudinal slits. 



Genus single Andreaea, 25. 1 75. 



ORDER III. Archidiales. 



Capsule bursting irregularly, spores few and very large. 



Genus single Archidium, 49. 176. 



ORDER IV. Bryales. 



Capsule bursting irregularly (spores numerous) or gen- 

 erally dehiscing by a deciduous operculum, in the 

 latter case usually furnished with a peristome. 

 Leaves not sphagnoid. 

 Genera numerous as follows: 



I. CLEISTOCARPI. Capsule without a deciduous operculum. 



(II on p. 158.) 



A. Green protonema persistent. (Bon p. 158.) 

 Leaves ecostate. 



Capsule colorless M icromitrinm, 37. 176. 



Capsule colored Ephemerum, 37. 176. 



Leaves costate Ephemerum, 37. 176. 



