ANALYTIC KEY 



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. 



Obdek II. — Andreaeales. 

 Capsule dehiscing by four (rarely six) longitudinal slits. 



Gtenus single Andreaea, 25. 175. 



Ordbe III. — Archidiales. 



Capsule bursting irregularly, spores few and very large. 



Genus single Archidium, 49. 176. 



Obdee 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. CLEISTOOAEPI.— CapsM^e without a deciduous operculum. 



(II on p. 158.) 



A. Oreen protonema persistent. (B on p. 158.) 

 Leaves ecostate. 



Capsule colorless Micromitrium, .37. 176. 



Capsule colored Ephemerum, 37. 1 76. 



Leaves costate Ephemerum, 37. 176. 



