24 



Clasisis IV. Hepaticae. 



Plantulae anniiae v. perennes, contextu celluloso, 

 laxiusculo, plerumque procunibentes, radicantes. Folia 

 nunc in frondeni enervem, rarius nervo e cellulis elonga- 

 tis formato percursam coalita, nunc discreta, disticlia, 

 saepe lobata v. dentata, interdum stomatibus donata, non 

 raro stipulis (ampMgastrns) instructa. Multiplicatio 

 per gemmas et propagula varia, propagatio ])er flores ge- 

 nitalibus diclinibus instructos. Antheridia utriculifor- 

 niia^ membranacea, in frondosis saepissime frondi immersa 

 V. in discuju maroine foliaceo cinctum collecta, in foliosis 

 axillaria, bracteis stipata, Immorem mucilaoinosunij in 

 granula coagulescentem includentia. Pistillidia solitaria, 

 V. in receptaculo capituliformi pedunculato coUecta, in- 

 volucro communi v. etiam partialibus cincta, interdum 

 filis articulatis (paraphysihus) mixta. Germen raris- 

 sime nudum, saepissime priinum intra bractcaju membra- 

 naceam, calyptratijn connatam (epigotitumj calyptram)^ 

 in processum styliformem attenuatam liberujn, tandeju in 

 pedicello elevatum, calyptram apice irregulariter rumpens, 

 calyptra basi persistente pedicellnm, in nonnuUis brevissi- 

 nium^ vaginante. ^porangia capsulaeforjuia, in pau- 

 cissimis cohunella centrali ])ercursa, ])lus minusve coni- 

 plete bi-quadrivalvia, interdum dentibus debiscentia v. 

 vertice irregulariter rupta. ^porae plurimae, liberae, e 

 spermodermi simplici et nucleo bomogeneo compositae, 

 saepissljne cellulis elongatis^ intus spiraliter striatis, spo- 

 rangii parieti interno adnatis (elaterihus) mixtae. 



Ordo XVII. Ricciaceae. 



Herbulae terrestres liraicolae, v. aqiiaticae, natantes aut 

 fluitantes, ut plurimum annuae, frondosae, fronde ceiliilosa, cras- 

 siuscula, arcte repente, subtus concolore v. purpurea, epiderniido 

 distincta, slrato cavitatum aerearum in nonnullis epiderniidi sub- 

 jecto. Antheridia frondi immersa, ostiolo emerso, papillaeformi 

 V. conico subulato, Pistillidia in eadem v. in diversa slirpe frondi 

 immersa v. imposi(.1, sessilia v. pedicellata, involucro communi 

 nullo v. paleaceo, polypbyllo, involuccllis nullis v. utriculiforuii- 

 bus, apice pcrforalis. Cahjptra stylo cvanesccutc coronala. SpO"- 



