QUILLWORTS. 183 



Synopsis. 



f Root. 



Quillwort 



j Short stem. 



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.) 

 Material. Entire plants, some dried, and others preserved in alcohol. 



