Classis VII. Filices.
Plantae rhizomate repente perennantes, rariustrunco erecto, interdum arborescente, praeditae. Trun-cus corticatus, e contextu prosencliymatoso conflatus, fa-sciculorum lignosorum cylindro integro in duas partesconcentricas divisus, altera angustiore inter corticem etlignum posita, altera centrali majore, medullari, ope ri-marum cylindri lignei cum exteriore communicante, etversus petiolos vasorum fasciculos emittente. Polia inrliizomatc sparsa, v. in apice trunci rosaceo-congesta,vernatione circinatim involuta, perennia sive annua, pe-tiolorum basi persistente, caudici accrescente, simplicia v.pinnata, integra v. pinnatilida, venosa, venis e celluliselongatis compositis, saepissime stomatibus instructis.Antherulia problematica, in quibusdam utriculi sporan-giis adstantes, clavati, transversim septati, apice poroaperti, rorein subvisciduni secernentes. Sporangia infoliorum dorso v. margine, venarum dorso v. apici, inter-dum venarum plurium anastomosi imposita, acervos (soros)nudos v. squama membranacea, aut margine folii trans-mutato (indusio) tectos formantia, pedicellata v. sessilia,nnilocularia, irregulariter (?) dehiscentia. Sporae innu-merae, liberae, globosae v. angulatae, germinatione pri-mum undique elongatae, deorsum radiculas, sursum cau-diculum exserentes.
Ordo XXVI. Polypodiaeeae.
Sporafigia hypoplivlia, annulo verticali v. excentrico cincta,sessilia v. pedicellata, trapsversim dehiscentia. — Frondes sim-plices v. compositae.
Suliordo I. PolypoiliCAiC* sporangia pedicellata, annuloverticali. Sporae subglobosae v. oblongae.
G e y E R a.
603. Acrosticlium L.a, Polybotrya H. It.a. Polyhotryar Presl.
Egenolphia Schott.
Olfersia liadd.
Elaphoglossmn Schott.
Kbipidopteris Schott .h. Acrosticlium JCaulf.y. Acomopterh Presl.tb Stenosemia Presl.
£ . Campium Presl.
Neuroplatyceros Ph/1'n .Platycerinm Desv.Alcicorniiim Gaudich.y, AcYosticivum Presl.Poecilopteris Eschtc.Bolbitis Schott .c. Gymnopteris Presl.act. Eugymnopteris Presl.Hymenolepis 'AT«W/.Leptoclubis Kaulffi fi. Annpansia Presl
3 *