— 16 — 



V, coriacea, raro basi articulata, inferior.i, media v. superiora 



dorso fructifera, ~t contracta ; sporangia subglobosa , bra- 



chypoda , laxe reticulata , seggregata , pauca v. onine dorsum 

 segmenti occupantia ; annulus rudimentar. dorsalis v. O ? — 

 sporae ellipsoideae? Osmunda^ Todea. 



F A M. 25. M A R A T T I A C E .1E. 



Filices exoticae, raajores: caudice brevi, passim crasso, pla- 

 centiformi ac squamis magnis (protophyllis?) obvallalo v. ar- 

 boreo, 5-pedaIi ? Folia articulato-pinnata v. bi - tripinnatifida, 

 pedatisecta , rarius unijugr» v. integra, pinnis elongalis, inte- 

 gerrim, v. serratis, venis densis, a basi furcatis <. Sporangia 

 poro verticali v. rimula introrsum hiantia, syncyclica v. bise- 

 riata et connata in soros quasi multilocularcs (bivalves), cir- 

 culares, oblongos v. lineares, sparsos, confertos v. totam dorsi 

 superficiem obtegentes, nudos v. indusialos. Sporae ellipsoid., 

 quibusdam echinulatae : — Kaul/ussia, Mai-attia.^ Angiopte' 

 ris, Da72(ea. 



F A 31. 2/|. P A R K K R I A C E E. 



Filices aquaticae, annuae, exoticae, foliis sinuato-ct de 

 composite-pinnatifidis, sinubus gemmascentibus, venis crassis 

 remote anastomosantibus; folia fructifera contracta, dicho 

 toma, laxa, revoluto-cava. Sporangia tcnerrima subglobosa 

 grossa, subannulala, e venis duabus longitudinalib. rachi 

 parallelis undique oriunda , sessilia v. brachypoda. Sporae 

 trigono-globosae, trifariam arcualo-striatae. Species paueae, 

 vita aquatica et texlura distinc tissimae, Pleridi, Allosoro prae- 

 sertim affines: — Parkeria {Ceratopleris) — an genera 2? 



Subordo II. Annulatae: annuli subcompleti situ vario. 



FAM. 25, POLYPODIACE^. [Cathetogyratae Bernh.). 



Caudex varius, raro arborescens. Folia integra, lobata, v. 

 l-Ji-pinnatisecta, sterilia et ferlilia passim dissimilia. Sporangia 



