474 INTRODUCTION TO CllYPTOG.'UHIC BOTANY. 



Phascei. — Sporangia indehiscent. 



Weissiei. — Peristome or 16-fid. Calyptra dimidiate. Tis- 

 sue of leaves dense. 



Dicra7iei. — -Teeth split to the centre. Cal}^tra dimidiate. 



Syrrhopodontei. — Teeth connivent or horizontal. Leaves 

 sheathing. 



Pottiacei. — Sporangia ovate. Peristome or 16-fid. Tissue 

 of leaves loose. 



Trichostomei. — Teeth filiform, 32, distinct or in pairs. 



Ripariacei. — Aquatic. Columella dilated above. Leaves 

 nerved. 



Hydropogonei. — Aquatic. Leaves nerveless. 



Enecdyptei. — Calyptra large, funnel-shaped, persistent. 



Hedwigiacei. — Sporangia sub-globose. Peristome 0. Leaves 

 nerveless. 



Grimmiei. — Sporangium even, equal. Cells of leaves punc- 

 tiform. 



Ptyehomitrei. — Calyptra furrowed. Teeth 16. Leaves punc- 

 tate. 



Octohlepharei. — Peristome 8-fid. Leaves white. 

 ^ Orthotriehei. — Sporangium equal. Calyptra large, pilose; 

 cells punctiform. 



Zygodontei. — Sporangium pyriform. Calyptra small, 

 smooth, dimidiate. 



Tetraphidei. — Tip of columella quadrifid, attached to peri- 

 stome. 



Buxhaumiei. — Sjiorangium slipper-shaped. Outer peristome 

 spurious. 



Polytrichei. — Top of columella membranous or pilose. Eigid. 



Leptostomei. — Peristome annuliform. Sporangium ascending. 



Bryei. — Peristome double. Leaves large-celled. 



Meesiei. — Sporangium irregular. Calyptra small. 



Funariei. — Sporangium irregular. Calyptra inflated below. 



Bartramiei. — Sporangium spherical. Leaves rigid, keeled, 

 serrated. 



Oreadei. — Sporangium spherical, small, on a curved stalk. 

 Calyptra dimidiate. 



Discelei. — Teeth 16, cloven at the base. Annual. 



Splachnei. — Sporangium apophysate. Leaves larger-celled. 

 Spores radiating from the columella. 



Schistostegei. — Peristome 0. Leaves vertical, distichous, or 

 pinnate. Spores radiating. 



