Dodatak:Popis papratnjača, O
Izvor: Hrvatska internetska enciklopedija
Oc
, Ochlogramma , Ochropteris
Od
, Odontoloma , Odontosoria
Oe
, Oenotrichia , Oeosporangium , Oetosis
Ol
, Oleandra , Oleandraceae , Oleandropsis
Olfersia Raddi
- Olfersia cervina (L.) Kunze
- Olfersia subdiaphana (Hook. & Grev.) T. Moore
- status nepoznat:
- Olfersia acrocarpa C.Presl
- Olfersia aemula C.Presl
- Olfersia alata C. Sánchez & García Caluff
- Olfersia angustata C.Presl
- Olfersia apoda C.Presl
- Olfersia auricoma C.Presl
- Olfersia bifurcata C.Presl
- Olfersia blumeana C.Presl
- Olfersia conformis C.Presl
- Olfersia crinita C.Presl
- Olfersia cuspidata C.Presl
- Olfersia decorata C.Presl
- Olfersia decurrens C.Presl
- Olfersia dimorpha C.Presl
- Olfersia dissimilis C.Presl
- Olfersia flabellata C.Presl
- Olfersia foeniculacea C.Presl
- Olfersia glabrescens C.Presl
- Olfersia gorgonea C.Presl
- Olfersia gracilis Blume
- Olfersia horridula C.Presl
- Olfersia hybrida C.Presl
- Olfersia integrifolia C.Presl
- Olfersia kaulfussiana C.Presl
- Olfersia kunzeana C.Presl
- Olfersia lanceolata Klotzsch
- Olfersia langsdorffii C.Presl
- Olfersia laurifolia C.Presl
- Olfersia lepidota C.Presl
- Olfersia lomarioides C.Presl
- Olfersia macrophylla Klotzsch
- Olfersia marginata C.Presl
- Olfersia muscosa C.Presl
- Olfersia neriifolia C.Presl
- Olfersia nervosa T.Moore
- Olfersia obducta C.Presl
- Olfersia obtusa T.Moore
- Olfersia pachyphylla C.Presl
- Olfersia paleacea C.Presl
- Olfersia peltata C.Presl
- Olfersia petiolosa C.Presl
- Olfersia pilosa C.Presl
- Olfersia piloselloides C.Presl
- Olfersia richardii T.Moore
- Olfersia salicifolia C.Presl
- Olfersia scolopendrifolia C.Presl
- Olfersia sellowiana C.Presl
- Olfersia sieberi C.Presl
- Olfersia simplex C.Presl
- Olfersia sorbifolia C.Presl
- Olfersia spatulata C.Presl
- Olfersia speciosa Klotzsch ex E. Fourn.
- Olfersia sphenophylla C.Presl
- Olfersia splendens C.Presl
- Olfersia squamata C.Presl
- Olfersia stricta C.Presl
- Olfersia succisifolia C.Presl
- Olfersia tecta C.Presl
- Olfersia tomentosa C.Presl
- Olfersia tripartita C.Presl
- Olfersia triquetra C.Presl
- Olfersia undulata C.Presl
- Olfersia variabilis C.Presl
- Olfersia vestita C.Presl
- Olfersia vieillardii Carruth.
- Olfersia villosa C.Presl
- Olfersia viscosa C.Presl
Pteridophyta → Polypodiopsida → Polypodiales → Dryopteridaceae , Oligocampia
On
, Onoclea , Onocleaceae , Onocleopsis , Onychium
Oo
, Oochlamys
Op
, Ophioderma , Ophioglossaceae , Ophioglossum , Ophiopteris
Or
, Oreogrammitis , Oreopteris , Ormoloma
Ornithopteris J. Sm., 1875.; nije priznato
- Ornithopteris wrightii (Baker) Millsp.
Pteridophyta → Polypodiopsida → Schizaeales , Orthiopteris , Orthogramma
Os
, Osmolindsaea , Osmunda , Osmundaceae , Osmundastrum , Osmundopteris
Ox
, Oxygonium