rNTRODUCTION TO CRYPTOGAJVIIC BOTANY. 175 



=5 ^' 





s.a 



-^ j Ceramiacefe. 

 SpyridiacecR, 



Eh odi/meniacece. 



Nucleus naked. 



Nucleus inclosed in a peri- 

 carp; compotind. 



Cryptonemiacece. Spores at length conglo- 



bated, generated in soli- 

 tary or aggregate cells. 



Spores at length conglo- 

 bated, generated within 

 the cells of moniliform 

 threads. 



j; /Nuclei naked. 



WrangcUacea. 



Nuclei immersed. Helmintliodadia. 



Nuclei in 

 warts. 



raised 



Placenta parietal. 



Placenta axile or 

 suspended. 



Spores in 

 strings. 



Placenta 

 basal. 



Sjiores 

 terminal. \ 



Sqiiamarice. — Lielienoid, 

 horizontal. 



Spongiocorpeo'. — Cylin- 

 drical. 



Ch (etangicce. 



Gelidiacece. 



Spha-rococcoidece. — Carti- 

 laginous or 

 membran- 

 ous. 



Cora^^/naceffi.— Calcareous. 



LaurcnciacecB. — Inarticu- 

 late. 



Rhodomeliacecv. — Articu- 

 late or with 

 an articulate 

 axis. 



