748 isoETE.E Isoetcs . 



Hab. in aridis nd rupiiim maritiinarum radices Ponti Lazici prope Rhize 

 (Bal!). 

 Ar. Geogr. Gallia australis, Corsica, Italia, Africa borealis. 



4. I. hystrix (Durieii iti Bory loc. cil.) cormo ovato Irisulcalo 

 phyllopodiis coriaceis nigris in corniia biiia lineari-subulata (adjeclo 

 sffipe dente lerlio intermedio brevi) abeuntibus veslito.foliis liliformi- 

 bus patentibus, macrosporis subglobosis albis tenuiter costatis et 

 tnberculatis, microsporis fuscis densissime aculeis latis snbtruncatis 

 vestitis ^. 



/5. submermis. — Cormus cilius desquamatus, phyllopodiorum 

 cornua brcviora. 



Ila]». iii collibus incultis circa Smyrnam frequenter (Bal !), in Peloponneso 

 et insula Zacyntho (Letourii. in iitt.). Fl. Apr. 



y. Phrygin. — Phyllopodia in dentcs breves triangulares abcuntia. 

 macrospora obsolete et parce tuberculata fere hevia linea transversa 

 fere obsolela. 



Hab. in collibus saxosis supra pagum Kaiagheul Dere 3 leucas ab urbe 

 Ouchak Phrygiae versus meridiein et occidentem distantem (Bal. 1327 !) 

 Maio. 



Ha.'C varietas qua? ultorins investigaiida ol) pliyllopodia in dentes triangu- 

 iares nec in cornua subulata abeuiitia ct macrosporas sul)l;i'ves forsaii 

 species propria. 



Ar. Geogr. Lusitania, Hispania, Anglia, (Jallia occidentalis et australi.'» 

 Corsica. Sardinia, Italia, Sicilia, AtVica liorealis. 



ORD. CXLVIII. MARSILEACEJ5 



(R. Br. Prodr. 166). 



Frondes e rhizomate, vernatione circinnatic, vel latere involutcT 

 foliiformes, slcriles vel lineares vel elliptiCcT vel limbo quadriloba?, 

 fertiles scssiles vel breviter stipitatic lamiiia marginibus recurvatis 

 et coalitis iiivolucrum {sporocarpiiiin,) sporangia includens forman- 

 tes. Sporangia (Wmov^ihn {Macrosporangid et Microsporanpia^ sporo- 

 carpio (pagina inleriore frondis) inclusa. — Rhizoma filiforme 

 llexuosum. — Planl.T. iii aqna degenles. 



Ti\. I. MARSILEiE Koch. 



Rhizoma radicaiis, Frondes vernatione circinnatie. Sporangia 

 nuciformia globosa vel oblonga basi frondium vel intra fibras radi- 

 cales inserta bilocularia. 



