12 



A. Leaves generally papillose and opake above; 

 upper cells mostly small and well-defined from the lower 

 ones Tufts dense. Calyptra rarely cucullate. 



Fam. 2C. Bncalyptacese. 



Calyptra long-acuminate, cylindric. Basal leaf-cells 

 finally rufous. 



Capsule cylindric, often not necked. Calyptra not 

 hairy but often rough. Leaves entire, sometimes with 

 hairpoint. Plants growing on earth and stones. Habit 

 of Barbula (Syntrichia). 



Fam. 27. OrthotrichaceaB. 



Calyptra short-apiculate, usually mitriform (conic or 

 campanulate), rarely cucullate. Basal leafcells not rufouS. 



Capsule oval-oblong or subcyhndric, mostly with 

 distinct neck. Calyptra generally hairy. Leaves usually 

 entire, very seldom with hairpoint. Plants often pulvinate, 

 usually growing on trees, sometimes on rocks. Habit of 

 Grimmia. 



B. Leaves generally smooth and not opake; cells 

 nearly uniform. Tufts sometimes loose. Calyptra cucullate. 

 Plants growing in swamps or on rocks. 



Fam. 28. Meeseacese. 



Capsule oblique, generally with long neck; endosto- 

 mial segments free. 



Leaves mostly serrate, not or indistinctly limbate,. 

 resembhng those of Bryum in the areolation. 



Fam. 29. Cinclidiacese. 



Capsule not oblique; neck short and thick or indi- 

 stinct; endostomial segments connate above to a convex 

 cupula. 



Leaves entire, (usually broadly) limbate, resembling 

 those of Mnium punctatum. 



Section 2. Plaiylepidece. Endostomial segments 

 broad, not confluent; teeth articulate. Leaves not compli- 

 cate. 



