266 



On Azolla and Salvinia. 



others. M. Vaucher, seems to have been unaware of the 

 existence of any other organs : although the indefinite mass- 

 containing secondary capsules appear to be represented by the 

 right hand figure off. 3. The circumstance that fixes the ger- 

 mination to have been observed in these particular secondary 

 capsules, (otherwise it would be an open question,) is the ex- 

 planation of fig. 5, and this figure itself. For the teeth there 

 mentioned and depicted only exist in these particular se- 

 condary capsules. But there is nothing to fix the exact 

 nature of the three teeth, which may either be those of the 

 incrustation, as is most probable, or the interlinear spaces of 

 the vertex of the yellow sac. 



The accompanying table will shew the opinions regarding 

 the locus naturalis of the family composed of these two ge- 

 nera. I consider the association of these plants in a tribe 

 with Isoeteae and Lycopodineae to be untenable.* The 

 classification of Reichenbach is remarkable. 



1804, 



Lamark. 



Naiades. 





1810, J 



Brown. 



Marsileaceae, (Rhizo- 



Pilularia, Marsilea, Salvinia, 



1814, \ 



spermae, Roth, D. 



Azolla. 







C.*) (ord. nat.) 





1828, 



Reichenbach. 



Musci. Gongylobrya. 

 (Tormatio.) 



Riccieae, Salviniaceae. 



1830, 



Bartling. 



Rhizocarpae, Batsch. 



Salviniaceae, Marsileaceae, Isoe- 







CclassO 



teae. 



1831, 



Sprengel. 



Rhizospermae, D. C. 



Marsilea, Pilularia, Salvinia, 



Azolla, Isoetes. 

 Lycopodineae (including Iso- 



1856, 



Lindley. 



Lycopodales. (alliance.) 









etes,) Marsileaceae, Salvinia- 



1836, 



Endlicher. 



Hydropterides (class.) 



ceae. 

 Salviniaceae, Marsileaceae. 



* De Candolle does not include Isoeteae in his Rhizospermeae. See Fl. Franc. 

 2, p. 577-579. 



Aublet places Salvinia in the Linnean Cryptogamia Algae, 



