- 896 - 



Trib. i^.^ Nardoideae Koch. Spiculae solitariae in singula rachidis excora- 

 tione receptae: flos unicus hermaphroditus: stigma solitarium elongatum ex apice 

 floris exertim. 



Nardm 37. 



ACOTILEDONhA 



Ord. CXXXV. Equiseta.ce\eDC. Squamae angulalae pellatae stipitatae, in apice 

 caulis, spicatim dispositae ; sporangia 7-9 membranacea oblonga, latere interno 

 tandem adaperlo, dehiscentia, in facie inferiore squamarum in orbem disposita: spo- 

 rae numerosissiraae globulosae hinc acutalae, lilamentis duobus auctae: llla ulrinque 

 progressive incrassata spiraliter circa sporas convoluta, siccitate elastice in crucem 

 dislensa. Caulis simplex vel ramosus articulalus, articuli caulis fistulosi, ramorum 

 farcti, omnes vagina dentata muniti; radices rhizomalicae sepe repentes. Plantae 

 vivaces terrestres vel aquaticae, 



Eguisetnm 527. 



Ord. CXXXVl. Ma.rsile\ce.ve R. Brow. Sporangia globosa vel oblonga coriacea 

 vel membranacea, involucris seu coneplaculis, conflata, nuculas vel capsulas refe- 

 renlia, in basi foliorum velpetiolorum,aut inter fibrasradicales.Sporangiadimorpha; 

 alia sporis foela, peculiari involucro sufi^uita, alia diaphana granulis luteis repleta. 

 Plantae aquatiles: rhizoma plus minus evolutum: petioli aphylli vel foliati. 



Trib. \.^ Marsileae Sporocarpia (Sporangia) coriacea basi fotiorum petialo- 

 nmve inserta. Rhizoma f,liforme sub aqua protractum et radicans. Folia vernatione 

 circinalia. Koch. 



Pilularia «29. Marsilea 528. 



Trib. S." Salviniaceae Bartl. Sporocarpia (Sparangia) memhranacea intrd 

 fihras radicales inserta vel caulis ramonmque hasi adnata et deorsum spertantia. 

 Plantae in aqua libere natantes. Folia dislica vernatione a latere involuta Korh. 



Salvinia 350. 



Trib 3.' Isoeteae Bartl. Sporangia in basi interna foliorum: folia fasciculala 

 strirta, etiam in vernationc erecta. e bulbo radicali erumpentia caulis nnllus. 

 Isoetes 531. 



