424! 



INTRODUCTION TO CRTPTOGAMIC BOTANY. 



3 Spores or nucules soli- 



I 



O! 



o 

 o 



Spores numerous, giving 

 rise to a plant which pro- 

 duces one or more succes- { 

 sive sets of fructifying 

 archegonia. 



Spores numerous, pro- 

 ducing a prothaUus which 

 bears a single set of arche- 

 gonia, which yield fructify- 

 ing plants. 



CharacecB. 



' BicciaoecB. — Sporangia 

 valveless with- 

 out elaters. 

 Marchantiaceoe, — Sporan- 



Ph 



e 



Si. 



a-s 



Ph 



< 



gia dependent,_ 

 vaivate or 



bursting irreg- 

 ularly. Spores 

 mixed with 

 elaters. 

 Jungermanniacece. — Spo- 

 rangia erect, 

 1 _ vaivate. Spores 

 mixed with 

 elaters. 



Musci. — Sporangia valve- 

 less, operculate, 

 without elaters" 



Filices. — Sporangia annu- 

 late, or rarely 

 exannulate and 

 closelycrowded 



Ophioglosaaceis. — Sporan- 

 gia exannulate, 

 bivalvate. 



Equisetaaem. — Sporangia 

 dependent , uni- 

 l ocular, burst- 

 ing laterally. 



MarsileacecB. — Sporangia 

 multilocular. 



Lycopodiacem. — Sporangia 

 axillary, unilo- 

 cular. 



