58 



BRITISH EOCENE FLORA. 



G. Stiriaca. (G. Dalmatica, and 

 many others) 

 Sub-genus Phymatodes. 



*t P. polypodioides , 



Tribe XIII, Acrostiche^. 

 Sub-genus Chrysodium. 



* C. LanzBeanum 



SUB-OEDER III. 



OSMUNDACEiE. 

 Genus Osmunda. 



* 0. Heerii, Gaudin. (0. petiolata, 



0. Obergiana, Heer, &c.) 

 Tabulated as British (?) 

 through O. Dowkeri. 



* O. lignitum 



Sub- ORDER IV. 

 SCHIZ^EACEiE. 

 Genus Anemia. 

 A. subcretacea. (A. Fojrsteri, Deb 

 & Ett.) 



Genus Lygodium. 

 L. Kaulfussi. (L. Gaudini, Heer. 

 L. exquisetum, Sap., &c.) 



Stjb-order V. 

 MARATTIACEiE. 

 Genus Marattia. 



M. Hookeri . . 



In Europe. 



Pi S 



Range of nearest existing representative 

 (for details, consult Hooker's 'Synopsis 

 Filicum.') 



G. proliferum, Tropics of Eastern 

 hemisphere. 



P. getninatum, Tropics of Western 

 hemisphere. 



C. aureum, Tropics of Eastern and 

 Western hemispberes. 



0. regalis, Arctic to sub-tropical 

 regions of Eastern and Western 

 hemispheres. 



0. Javanica, Tropics, &c., of Eastern 

 hemisphere. 



A. adiantifolia, Sub-tropics, &c., of 

 Western hemisphere. 



L. palmatum, Sub-tropics, Western 

 hemisphere. 



M. Kaulfussii, Tropics of Western 

 hemispbere. 



* Signifies that the form is almost specifically indistinguishable from existing species, f Indicates 

 that the fossil species has only been met with in England. ... That the form is represented by a less 

 closely allied species. 1, 2, 3, are Aix-la-Chapelle species. 4, L. Kargii, Heer, of Oeningen. 5, W. 

 latiloba, Lesq. 6, W. venosa. The allied species are enclosed in ( ). 



The above table comprises fifteen species, which have been described from such exceptionally ample 

 and well-preserved specimens that it seems unlikely that doubt can arise respecting the accuracy of their 

 determination. The list might have been extended, yet even as it stands no striking group is omitted 

 except the Tree-ferns of Sezanne, and it is thus remarkable that nearly all the distinctive forms and those 

 of most value for comparison should belong to our British Eocene flora. Compared with the total number 

 of existing Ferns they appear very few ; yet, contrasted with the present fern-flora of North America, 

 which contains but fifty species, with that of Europe, which possesses but sixty, or still more so with 

 that of Great Britain, which has hut thirty-six, their number does not appear insignificant. 



