Ophioglossaceae
Pteridophyta (Ferns and allies)
Oph
Ophioglossaceae
Adi
Adiantaceae
Asp
Aspleniaceae
Ble
Blechnaceae
Cya
Cyatheaceae
Dav
Davalliaceae
Den
Dennstaedtiaceae
Dip
Dipteridaceae
Dry
Dryopteridaceae
Equ
Equisetaceae
Gle
Gleicheniaceae
Hym
Hymenophyllaceae
Lom
Lomariopsidaceae
Lyc
Lycopodiaceae
Mar
Marattiaceae
Ole
Oleandraceae
Pol
Polypodiaceae
Psi
Psilotaceae
Pte
Pteridaceae
Sal
Salviniaceae
Sch
Schizaeaceae
Sel
Selaginellaceae
The
Thelypteridaceae
Woo
Woodsiaceae