A. adiantum-nigrum ssp. adiantum-nigrum
A. adiantum-nigrum ssp. corrunense
A. adiantum-nigrum ssp. onopteris

A. billotii
A. ceterach
A. csikii

A. csikii var. subequale
A. csikii var. trogyense

A. marinum
A. obovatum

A. onopteris
A. ruta-muraria
A. scolopendrium
A. septentrionale
A. trichomanes

A. trichomanes ssp. quadrivalens
A. trichomanes ssp. pachyrachis

A. trichomanes-ramosum
A. viride

Asplenium hybrids:

A. adiantum-nigrum x A. billotii = A. x sarniense
A. adiantum-nigrum x A. onopteris = A. x ticinense
A. adiantum-nigrum x A. septentrionale = A. x contrei
A. adiantum-nigrum x A. scolopendrium = A. x jacksonii
A. billotii x A. scolopendrium = A. x microdon
A. csikii x A. trichomanes ssp. quadrivalens = A. x staufferi
A. ruta-muraria x A. septentrionale = A. x murbeckii
A. ruta-muraria x A. trichomanes ssp. quadrivalens = A. x clermontiae
A. septentrionale x A. trichomanes ssp. trichomanes = A. x alternifolium
A. trichomanes ssp. quadrivalens x A. scolopendrium = A. x confluens
A. trichomanes ssp. trichomanes x A. trichomanes ssp. quadrivalens = A. x lusaticum
A. x alternifolium
A. x clermontiae
A. x confluens
A. x contrei
A. x jacksonii
A. x lusaticum
A. x microdon
A. x murbeckii
A. x sarniense
A. x souchei
A. x staufferi
A. x ticinense

A. filix-femina
A. flexile

B. spicant
[B. chilense]
[B. cordatum]
[B. penna-marina]

[C. falcatum]
[C. fortunei]

C. diaphana
C. dickieana
C. fragilis

C. fragilis ssp. dickieana
C. fragilis var. dickieana

C. montana
C. regia

D. alpinum
D. complanatum - see D. x issleri

D. complanatum morphotype decipiens
D. complanatum ssp. alpinum
D. complanatum ssp. issleri

D. alpinum x D. complanatum ssp. complanatum = D. x issleri
D. alpinum x D. tristachyum = D. x issleri (?)
D. x issleri

D. abbreviata
D. aemula
D. affinis

D. affinis ssp. affinis
D. affinis ssp. kerryensis
D. affinis ssp. paleaceolobata

{new species classification of D. affinis:}
D. affinis

D. affinis ssp. affinis
D. affinis ssp. kerryensis
D. affinis ssp. paleaceolobata

D. borreri
D. cambrensis

D. cambrensis ssp. cambrensis
D. cambrensis ssp. pseudocomplexa

D. pseudodisjuncta
{previous subspecies classification of D. affinis:}
D. affinis ssp. affinis
D. affinis ssp. borreri

D. affinis ssp. cambrensis
D. affinis ssp. pseudodisjuncta
D. affinis ssp. stilluppensis
{previous morphotype classification of D. affinis:}
D. affinis m. affinis
D. affinis m. borreri
D. affinis m. cambrensis
D. affinis m. paleaceolobata
D. affinis m. robusta

D. assimilis
D. austriaca
D. borreri
D. cambrensis

D. cambrensis ssp. cambrensis
D. cambrensis ssp. pseudocomplexa

D. carthusiana
D. cristata
D. dilatata
D. expansa
D. filix-mas
D. lanceolatocristata
D. mindshelkensis
D. oreades
D. pseudodisjuncta
D. pseudomas
D. remota
D. spinulosa
D. stilluppensis
D. submontana
D. tavelii
D. villarii

Dryopteris hybrids:

D. aemula x D. oreades = D. x pseudoabbreviata
D. affinis x D. expansa = D. x remota
D. carthusiana x D. cristata = D. x uliginosa
D. carthusiana x D. dilatata = D. x deweveri
D. carthusiana x D. expansa = D. x sarvelae
D. carthusiana x D. filix-mas = D. x brathaica
D. dilatata x D. expansa = D. x ambrosiae
D. filix-mas x D. affinis = D. x complexa

D. filix-mas x D. affinis ssp. affinis = D. x complexa nothossp. complexa
D. filix-mas x D. affinis ssp. paleaceolabata = D. x complexa nothossp. contorta

D. filix-mas x D. borreri = D. x critica
D. filix-mas x D. cambrensis = D. x convoluta

D. filix-mas x D. cambrensis ssp. cambrensis = D. x convoluta nothossp. occidentalis
D. filix-mas x D. cambrensis ssp. pseudocomplexa = D. x convoluta nothossp. inconspicua

D. filix-mas x D. oreades = D. x mantoniae
D. x ambrosiae
D. x brathaica
D. x complexa

D. x complexa nothossp. complexa
D. x complexa nothossp. contorta

D. x convoluta

D. x convoluta nothossp. inconspicua
D. x convoluta nothossp. occidentalis

D. x critica
D. x deweveri
D. x mantoniae
D. x pseudoabbreviata
D. x remota
D. x sarvelae
D. x tavelii
D. x uliginosa

E. arvense
E. fluviatile
E. hyemale
E. palustre
E. pratense
E. ramosissimum
E. sylvaticum
E. telmateia
E. variegatum

E. variegatum var. majus
E. variegatum var. wilsonii

Equisetum hybrids:

E. arvense x E. fluviatile = E. x litorale
E. arvense x E. palustre = E. x rothmaleri
E. arvense x E. telmateia = E. x robertsii
E. fluviatile x E. palustre = E. x dycei
E. fluviatile x E. pratense = E. x mchaffieae
E. fluviatile x E. telmateia = E. x wilmotii
E. hyemale x E. ramosissimum = E. x moorei
E. hyemale x E. variegatum = E. x trachyodon
E. palustre x E. telmateia = E. x font-queri
E. pratense x E. sylvaticum = E. x mildeanum
E. sylvaticum x E. telmateia = E. x bowmanii
E. x bowmanii
E. x dubium
E. x dycei
E. x font-queri
E. x litorale
E. x mchaffieae
E. x mildeanum
E. x moorei
E. x robertsii
E. x rothmaleri
E. x trachyodon
E. x wilmotii

G. dryopteris
G. robertianum

H. selago var. apressa
H. selago var. recurva
H. selago ssp. arctica
H. selago ssp. selago

H. tunbrigense
H. peltatum
H. wilsonii
H. unilaterale

I. echinospora
I. histrix
I. lacustris
I. setacea

Isoetes hybrids:

I. lacustris x I. echinospora = I. x hickeyi
I. x hickeyi

L. annotina
L. annotinum
L. complanatum
L. clavatum
L. clavatum ssp. monostachyon
L. inundatum
L. lagopus
L. selago

[M. pustulatum]
[M. diversifolium]

O. azoricum
O. lusitanicum
O. vulgatum

[P. falcata]
[P. fortunei]

P. australe
P. cambricum
P. interjectum
P. vulgare

Polypodium hybrids:

P. cambricum x P. interjectum = P. x shivasiae
P. cambricum x P. vulgare = P. x font-queri
P. interjectum x P. vulgare = P. x mantoniae
P. x font-queri
P. x mantoniae
P. x shivasiae

P. aculeatum
P. angulare
[P. falcatum]
[P. falcatum var. fortunei]
[P. fortunei]
P. lobatum
P. lonchitis
[P. munitum]
P. setiferum

Polystichum hybrids:

P. aculeatum x P. lonchitis = P. x illyricum
P. aculeatum x P. setiferum = P. x bicknellii
P. lonchitis x P. setiferum = P. x lonchitiforme
P. munitum x P. setiferum = P x lesliei
P. x bicknellii
P. x illyricum
P. x lesliei
P. x lonchitiforme

P. aquilinum ssp. aquilinum

P. aquilinum ssp. aquilinum var. atlanticum
P. aquilinum ssp. aquilinum var. fulvum

P. aquilinum ssp. atlanticum
P. aquilinum ssp. fulvum
P. aquilinum ssp. latiusculum
P. aquilinum ssp. pinetorum

P. aquilinum ssp. pinetorum var. osmundaceum

P. pinetorum ssp. osmundaceum
P. pinetorum ssp. pinetorum

[P. cretica]
[P. vittata]

[S. kraussiana]
S. selaginoides

T. dryopteris
T. limbosperma
T. oreopteris
T. palustris
T. phegopteris
T. robertiana
T. thelypteroides ssp. glabra

W. alpina
W. hyperborea
W. ilvensis

Acute-leaved Spleenwort
Adderstongue (species)
Adderstongue (genus)

Common
Least
Small

Alpine Clubmoss
Alpine Lady Fern
Alpine Hybrid Shield Fern
Alpine Woodsia
Alternate-leaved Spleenwort
Atlantic Bracken
Arctic Stagshorn Clubmoss
Atlantic Hybrid Shield fern
[Australian Tree Fern]
Beech Fern
Black Spleenwort
Bladder Fern

Brittle
Diaphanous
Dickie's
Mountain

Boston Horsetail
Bowman's Horsetail
Bracken (species)
Bracken (genus)

Atlantic
Cairngorm
Common
Osmunda-like
Perthshire
Pinewood

Branched Horsetail
Brathay Fern
Bristle Fern
Brittle Bladder Fern
Broad Buckler Fern
Buckler Fern

Broad
Crested
Distant-leaved
[Fen]
Gibby's Hybrid
Hay-scented
Hybrid Fen
Hybrid Narrow
Kintyre
Limestone
Narrow
Northern
Rigid
Scaly

Caernarvonshire Spleenwort
Cairngorm Bracken
[Chinese Holly Fern]
Clubmoss

Alpine
Arctic Stagshorn
Fir
Hybrid Alpine
Interrupted
Issler's
[Krauss's]
Lesser
Marsh
[Mossy]
Stagshorn

Common Bracken
Common Maidenhair Spleenwort
Common Polypody
Confluent Maidenhar Spleenwort
Crested Buckler Fern
[Cretan Brake]
Delicate Maidenhair Spleenwort
Diaphanous Bladder Fern
Dickie's Bladder Fern
Distant-leaved Buckler Fern
Ditch Horsetail
Dutch Rush
[Fen Buckler Fern]
Field Horsetail
Filmy Fern

Tunbridge
Wilson's

Fir Clubmoss
Flexile Lady Fern
Font-Quer's Polypody
Forked Spleenwort
[Fortune's Holly Fern]
Gibby's Hybrid Buckler Fern
Golden Male Fern
Golden-scaled Male Fern

Great Horsetail
Green Spleenwort
Guernsey Fern
Guernsey Spleenwort
Hard Fern (species)
Hard Fern (genus)

[Chilean]
[Little]

Hard Shield Fern
Hart's Tongue Fern
Hay-scented Buckler Fern
Hebridean Horsetail
Holly Fern (species)
Holly Fern (genus)

[Chinese]
[Fortune's]
[House]
[Japanese = Cyrtomium falcatum]
[Japanese = Cyrtomium fortunei]

Boston
Branched
Bowman's
Ditch
Field
Great
Hebridean
Mackay's
Marsh
Milde's
Moore's
Rough
Shade
Shore
Skye
Variegated
Water
Wilmot's
Wood

[House Holly Fern]
Hybrid Alpine Clubmoss
Hybrid Black Spleenwort
Hybrid Fen Buckler Fern
Hybrid Male Fern
Hybrid Mountain Male Fern
Hybrid Narrow Buckler Fern
Intermediate Polypody
Interrupted Clubmoss
Irish Spleenwort
Issler's Clubmoss
Jackson's Fern
[Japanese Holly Fern (= Cyrtomium falcatum)]
[Japanese Holly Fern (= Cyrtomium fortunei)]
Jersey Fern
[Kangaroo Fern]
Killarney Fern
Kintyre Buckler Fern
[Krauss's Clubmoss]
[Krauss's Spikemoss]
[Ladder Brake]
Lady Clermont's Spleenwort
Lady Fern (species)
Lady Fern (genus)

Alpine
Flexile
Newman's
Scottish

Lanceolate Spleenwort
Land Quillwort
Lemon-scented Fern
Lesser Clubmoss
Limestone Buckler Fern
Limestone Oak Fern
Lobed Maidenhair Spleenwort
Lowland Hybrid Shield Fern
Mackay's Horsetail
Maidenhair Fern (genus)
Maidenhair Fern (species)
Maidenhair Spleenwort
Male Fern (species)
Male Fern (genus)

Golden
Golden-scaled
Hybrid
Hybrid Mountain
Mountain
Scaly

Manton's Polypody
Marsh Clubmoss
Marsh Fern
Marsh Horsetail
Milde's Horsetail
Moonwort
Moore's Horsetail
[Mossy Clubmoss]
Mountain Bladder Fern
Mountain Fern
Mountain Male Fern
Mull Fern
Murbeck's Spleenwort
Narrow Buckler Fern
Newman's Lady Fern
Northern Buckler Fern
Oak Fern (species)
Oak Fern (genus)

Limestone
Woodland

Oblong Woodsia
Osmunda-like Bracken
[Ostrich Fern]
Parsley Fern
Perthshire Bracken
Pinewood Bracken
Pillwort
Polypody

Common
Font-Quer's
Intermediate
Manton's
Shivas'
Southern
Western

Quillwort (species)
Quillwort (genus)

Land
Spring

[Ribbon Fern]
Rigid Buckler Fern
Rough Horsetail
Royal Fern
Rustyback Fern
Scaly Buckler Fern
Sea Spleenwort
[Sensitive Fern]
Scaly Male Fern

Borrer's Scaly Male Fern
Narrow Scaly Male Fern
Western Scaly Male Fern

Scottish Lady Fern
Shade Horsetail
Shield Fern

Alpine Hybrid
Atlantic Hybrid
Hard
Lowland Hybrid
Soft

Shivas' Polypody
Shore Horsetail
Skye Horsetail
Small Adderstongue
Soft Shield Fern
Southern Polypody
[Spikemoss]

Acute-leaved
Alternate-leaved
Black
Caernarvonshire
Common Maidenhair
Confluent Maidenhair
Delicate Maidenhair
Forked
Green
Guernsey
Hybrid Black
Irish
Lady Clermont's
Lanceolate
Lobed Maidenhair
Maidenhair
Murbeck's
Western Black
Sea

Spring Quillwort
Stagshorn Clubmoss
Stagshorn Clubmoss, Arctic
[Sword-fern, Western]
[Tree Fern]

Tunbridge Filmy Ferm
Variegated Horsetail
Wall-Rue
[Water Fern (=Azolla)]
[Water Fern (=Blechnum)]

Water Horsetail
Western Black Spleenwort
Western Polypody
[Western Sword-fern]
Wilmot's Horsetail
Wilson's Filmy Ferm
Wood Horsetail
Woodland Oak Fern
Woodsia

Alpine
Oblong