— lo — 



FAM 17. S ALVI NI ACEiE. 



Hbae natantcs, ramis i^innatis v. radiatis, foliis alternis, 

 integerrimis, astomis. Sporocarpia ad liases ramorum v. inter 

 librillas radicales sita, evalvia, dimorpha, monoeca : ab"a polli- 

 nariis pedicellatis, alia sporangiis monosporis foeta : — Azolla, 

 Salvinia. 



F A M 18. M A R S I I> E A C E 3t. 



Hbae repentes, hygrobiae, foliis alternis, abortivis v. qua- 

 drisectis, flabellincrviis, stomatosis, novell. circinatis. Sporocar- 

 pia uniformia, axillaria v. petiolaria, 4-locularia v. bilocularia 

 et transversim plurilocellata , semiquadri - v. bivalvia, sporan- 

 giis monosporis et poUinariis plena: Pilularia , Marsilea. 



Ordo II. Selagines. 



Caulis corticalus, axi ligneo, spiriductibus veris, annulatis 

 V. scalariformibus praedito, fasciculos ad j)hyllodia simplicia 

 et rhizonia emittente. Organa fructificationis homo-dimorpha. 



FAM. 19. ISOETACEiE. 



Hbae submersse: truncus depressus, axi parvo, fasciculos 

 spiriductuum per corticem arcuato - radiatim in phyllodia et 

 rhizonia emittente, Phyllodia subulata lacunosa, basi exca- 

 vata, fovent sporocarpia bracteolata, multilocellata, poUinariis 

 et sporis foeta: — Isoetcs. 



FAM. 20. LYCOPODI ACEiE. 



Hbae v. frutices, Muscos, Jungermannias, imo Fiiices aemu- 

 lantes, dichotomo - ramosi -d, radice primaria et radiculis se- 



cundariis. Caulis hg-no vasculoso centrah, -i duro et cortice 



crasso, laxiori praeditus, novellus vix circiriatus, phyllodiis 

 parvis, confertis, integris, uninerviis, homo- v. dimorphis. Or- 

 gana fructificationis , e foliis v. bracteis oriunda, homo- v, 

 dimorpha : poUinaria l-(2-5) -locularia; sporangia uniloGU- 

 laria, minima v. majora, solilaria, 5-il-cocca, 3-^-spora. 

 Spec. 279? — Psilotum^ ThmesipterU., Selaginella^ Ljcopodiurn. 



