QUILLWORTS. 



183 



Synopsis. 



fRoot 



Quillwort 



,-r . . . Short stem. 



1 ''' Leaves long, quill-like. 



Sporangium in base of each leaf. 



Some sporangia with small spores. 

 Some sporangia with large spores. 

 (The prothallium is not described here.) 

 M&tsrial. — Entire plants, some dried, and others preserved in alcohol. 



