61 



136. Calyptra conical or hood-form. 137 

 Calyptra mitre-form or extinguisher-form. 



Peristome consisting of four three-sided teeth. Calyptra striated. 



TETRAPHIDACE.E. 

 Peristome consisting of sixteen teeth, which are commonly two or 



three cleft. Calyptra smooth, or but slightly hairy, or with an 



uneven surface at the apex. GRIMMIACE^:. 

 Peristome consisting of thirty-two or sixty-four teeth. 



Capsule resting on an enlargement of the pedicel, or apophysis, 

 very much larger and of looser texture than the capsule itself. 

 Calyptra very small. Leaves of loose texture. SPLACHNACE.&. 



Apophysis smaller than the capsule, and of firm texture. Calyptra 

 furnished with long hairs, which often extend below the base of 

 the capsule. Leaves remarkably firm in texture. 



POLYTRICHACE^:. 



137. Capsule resting on a conspicuous apophysis, larger than itself, 



and usually of a different color. SPLACHNACE.E. 

 Apophysis none. 



Plants floating on the water. Leaves ribbed. Having, at the base 

 of the peristome teeth, a membrane which is perforated with large 

 openings. GRIMMIACE.E. 



Plants growing on land. Membrane at the base of the peristome, 

 teeth none, or without openings. - 



Capsule oval or cylindrical. 138 

 Capsule nearly globular. 



Teeth of the peristome perforated with many holes. GRIMMIACEJJ. 

 Teeth entire or sometimes coarsely notched, but not perforated. 



Capsule having a wide mouth, twisted. 



Capsule globular, with a 'narrow mouth. BRYACE.E. 



138. Teeth of the peristome sixteen, two cleft, with the two limbs 



usually unequal, without a common membrane at base. 139 

 Teeth thirty-two or sixty-four. 140 

 Teeth irregular, cut short, or ragged. 



