28 



V. Trematodontece. Capsule curved; teeeth cleft 

 or entire. Leaves not mamillose; alar cells not deiined. 

 Differs from other Dicranacece in the long neck of the 

 capsule. 



87. Trematodon. Leaves mostly narrow. 



VL Ditrichece. Capsule generally straight; teeth 

 partite with subfiliform legs. Leaves not mamillose, narrow ; 

 cells narrow, the alar seldom distinct. 



88. Ditrichum. Capsule usually not sulcate when 

 dry. Habit of Dicranella. 



VII. Cynodontiece. Capsule oblique or straight; 

 teeth cleft (in Cynodontium schisti mostly entire). Leaves 

 mamillose, mostly recurved, denticulate; upper cells sub- 

 quadrate ; alar cells generally not well-deiined ; costa narrow, 

 not excurrent. Galyptra not fimbriate. 



89. Cynodontium. Leaves not sheathing. Capsule 

 mostly sulcate. 



90. Dichodontium. Leaves sheathing. Capsule not 

 sulcate. 



VIII. Dicranece. Capsule curved or straight; teeth 

 cleft or (in few species) partite with subulate legs. Leaves 

 generally not mamillose and not recurved, denticulate or 

 entire; alar cells (exc. some species of Catnpylopus) 

 well-defined. Leaves generally setiform and somewhat 

 rigid, sometimes crisped when dry. Plants mostly robust. 



91. Dicranum. Calyptra not fimbriate. Leaves 

 without hairpoint ; alar cells distinct ; costa mostly narrow, 

 not often long-excurrent. Pedicel of the capsule ( exc. 2 

 species) straight. 



92. Campy lopus. Calyptra fimbriate at base. Leaves 

 sometimes with hairpoint ; alar cells sometimes not defined ; 

 costa mostly very broad and long-excurrent. Pedicel of 

 the capsule arcuate or flexuous. Not often fruiting. 



IX. Dlcranellece. Capsule curved or straight ; teeth 

 cleft or entire. Leaves not mamillose, sometimes recur- 

 ved, denticulate or entire; alar cells not often distinct; 



