29 



costa mostly narrow. Plants generally not large (exc. 

 Oncophorus and Oreas). 



* Peristomial teeth cleft. 



93. Dicranella. Capsule mostly curved, sometimes 

 strumose, often sulcate when dry. Leaves narrow, often 

 entire, sometimes sheathing; cells generally narrow, the 

 alar not (exc. D. rubra) defined; costa often excurrent, 

 seldom broad. 



94. Dicranoweisia. Capsule straight and not stru- 

 mose (or, in one species, slightly curved and substrumose), 

 not sulcate. Leaves narrow, entire, not sheathing; upper 

 cells short ; alar cells mostly distinct ; costa narrow, rarely 

 excurrent. 



95. Oncophorus. Capsule curved, strumose, not 

 sulcate. Leaves with a very broad and sheathing base, 

 often entire; upper cells short; alar cells not defined; 

 costa narrow, not excurrent. Plants mostly large. 



** Peristomial teeth us. entire. Capsule straight, 

 striate, not strumose. Leaves narrow, denticulate; upper 

 cells short. 



96. Rhabdoweisia. Capsule terminal; pedicel 

 straight. Costa of the leaves not excurrent. Plants small. 



97. Oreas. Capsule lateral or sublateral; pedicel 

 arcuate. Costa of the leaves excurrent. Plants generally 

 large. 



Fam. 22. Seligeriacese. 



L Seligeriece. Alar leaf-cells not distinct. Plants 

 very small, generally not tufted. Monoecious. 



98. Seligeria. Calyptra eucullate. Peristome usu- 

 ally well-evolute, in one species wanting. 



99. Brachydontium. Calyptra submitriform and 

 lobate. Peristome rudimentary. Habit of Seligeria. 



100. Trochobryum. Peristome rudimentary; teeth 

 very short and truncate. Calyptra eucullate. Leaves with 

 a very long-excurrent costa. 



n. Blindiece. Alar leaf-cells dilated, generally qua- 



