Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         ["vegetable kingdom"]
           ["Cryptogams"]
             [Class Acrogens Lindl.]
               [Alliance Filicales Dumort.]
                 [Natural order Filices Juss. (1789)]
                   01 [Tribe Marattiaceæ Kaulf.]
                   02 [Tribe Osmundaceæ Martynov]
                   03 [Tribe Schizæaceæ Kaulf.]
                   04 [Tribe Parkeriaceæ Hook.]
                   05 [Tribe Acrostichaceæ Mett. ex Frank]
                   06 [Tribe Tænitideæ]
                   07 [Tribe Grammitaceæ]
                   08 [Tribe Polypodiaceæ J.Presl & C.Presl]
                   09 [Tribe Vittariaceæ Ching]
                   10 [Tribe Adiantiaceæ]
                   11 [Tribe Dicksoniaceæ C.Presl (1836)] see Tribe Dicksonieae Gaudich. (1829)
                   12 [Tribe Davalliaceæ (Gaudich.) M. R. Schomb.]
                   13 [Tribe Aspleniaceæ Newman]
                   14 [Tribe Aspidiaceæ Mett. ex A.B.Frank]
                   15 [Tribe "Peranemaceæ" C.Presl (1836), orth. inval.]
                   16 [Tribe Hymenophyllaceæ Mart.]
                   17 [Tribe Cyatheaceæ Subfamily Dicksonieae Gaudich.]
                   18 [Tribe Gleicheniaceæ (R.Br.) C.Presl]