Fam. 7. Meteoriacese, 



Stem pendent, without paraphyllia. Leaves papillose ; 

 cells very small, dilated or narrow. Calyptra mitriform 

 or cucuUate. Dioecious, very rarely fruiting. 



Fam. 8. Hookeriacese. 

 Stem neither tree-like nor pendent; paraphyllia none. 

 Leaves smooth or (in Callicostella) papillose; cells mostly 

 dilated. Calyptra mitriform. Monoecious or polygamous. 



Fam. 9. Leskeacese. 



Stem decumbent, often with paraphyllia. Leaves 

 mostly papillose; cells usually dilated. Calyptra cucullate. 



Fam. 10. Bntodontacese. 



Stem generally decumbent, rarely ascending but not, 

 tree-like; paraphyllia none. Leaves smooth; cells mostly 

 narrow. Calyptra cucullate. 



B. Platylepidece. Endostomial segments broad. 



Capsule often asymmetric or curved. Calyptra cucul- 

 late. Leaves sometimes falcate. 



a. Primary stem rhizomatic, mostly subterranean; 

 secondary stems generally tree-like and suberect or ascend- 

 ing. 



Leaves neither papillose nor falcate. 



Fam. IL Climaciaoese. 



' Capsule symmetric or asymmetric; pedicel mostly 

 smooth. Stem often with paraphyllia. Leaf-cells rapstly 

 narrow. Branch-leaves often strongly serrate. 



b. Stem not tree-like, generally decumbent. 



Fam. 12. Thuidiacese. 



Capsule generally asymmetric or curved; pedicel 

 generally smooth. Stem often with paraphyllia. Leaves 

 usually papillose, not distichous, rarely falcate; cells mostly 

 dilated. 



