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Family: Dennstaedtiaceae
Family: Dryopteridaceae
  Genus: Dryopteris

    Dryopteris carthusiana (Vill.) H.P.Fuchs*+
        spinulose wood fern, toothed wood fern
             Aspidium spinulosum (O.F.Müll.) Sw.
             Dryopteris austriaca (Jacq.) Woyn. var. spinulosa (O.F.Müll) Fiori
             Dryopteris spinulosa (O.F.Müll.) Watt
             Polypodium carthusianum Vill.
             Polypodium spinulosum O.F.Müll.
             Thelypteris spinulosa (O.F.Müll.) Nieuwl.
    Dryopteris clintoniana (D.C.Eaton) Dowell+
        Clinton's shield fern, Clinton's wood fern
             Aspidium cristatum (L.) Sw. var. clintonianum D.C.Eaton
             Dryopteris cristata (L.) A.Gray var. clintoniana (D.C.Eaton) Underw.
             Dryopteris X poyseri Wherry X
             Thelypteris cristata (L.) Nieuwl. var. clintoniana (D.C.Eaton) Weath.
    Dryopteris cristata (L.) A.Gray*+
        crested shield fern, crested wood fern
             Aspidium cristatum (L.) Sw.
             Polypodium cristatum L.
             Thelypteris cristata (L.) Nieuwl.
    Dryopteris expansa (C.Presl) Fraser-Jenk. & Jermy*+
        northern wood fern, spreading wood fern
             Nephrodium expansum C.Presl
             Aspidium spinulosum (O.F.Müll.) Sw. var. americanum Fisch. ex Kunze
             Dryopteris assimilis S.Walker
             Dryopteris dilatata auct. non (Hoffm.) A.Gray
             Dryopteris dilatata (Hoffm.) A.Gray subsp. americana
             Dryopteris spinulosa (O.F.Müll.) Watt var. americana (Fisch. ex Kunze) Fernald
             Dryopteris spinulosa (O.F.Müll.) Watt var. dilatata auct. non (Hoffm.) Underw.
             Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. americana (Fisch. ex Kunze) Weath.
    Dryopteris filix-mas (L.) Schott*+
        male fern
             Polypodium filix-mas L.
    Dryopteris fragrans (L.) Schott*+
        fragrant fern, fragrant wood fern
             Dryopteris fragrans (L.) Schott var. remotiuscula Kom.
             Thelypteris fragrans (L.) Nieuwl.
             Thelypteris fragrans (L.) Nieuwl. var. hookeriana Fernald
             Polypodium fragrans L.
    Dryopteris goldiana (Hook. ex Goldie) A.Gray*+
        giant wood fern, Goldie's fern, Goldie's wood fern
             Aspidium goldianum Hook. ex Goldie
             Thelypteris goldiana (Hook. ex Goldie) Nieuwl.
    Dryopteris intermedia (Muhl. ex Willd.) A.Gray*+
        fancy wood fern, glandular wood fern, intermediate wood fern
             Aspidium intermedium Muhl. ex Willd.
             Aspidium spinulosum (O.F.Müll.) Sw. var. intermedium (Muhl. ex Willd.) D.C.Eaton
             Dryopteris austriaca (Jacq.) Woyn. var. intermedia (Muhl. ex Willd.) C.V.Morton
             Dryopteris spinulosa (O.F.Müll.) Watt var. intermedia (Muhl. ex Willd.) Underw.
             Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. intermedia (Muhl. ex Willd.) Nieuwl.
    Dryopteris intermedia (Muhl. ex Willd.) A.Gray X D. marginalis (L.) A.Gray+
        glandular marginal wood fern
    Dryopteris marginalis (L.) A.Gray*+
        marginal shield fern, marginal wood fern
             Aspidium marginale (L.) Sw.
             Polypodium marginale L.
             Thelypteris marginalis (L.) Nieuwl.
    Dryopteris X boottii (Tuck.) Underw. (pro sp.) X *+
        Boott's wood fern
             Aspidium boottii Tuck.
             Thelypteris boottii (Tuck.) Nieuwl.
    Dryopteris X pittsfordensis Sloss. X +
        Pittsford's wood fern
    Dryopteris X slossonae Wherry ex Lellinger X +
        Slosson's wood fern
    Dryopteris X triploidea Wherry X +
        triploid wood fern
             Dryopteris austriaca (Jacq.) Woyn. var. fructuosa (Gilbert) C.V.Morton
             Dryopteris intermedia (Muhl. ex Willd.) A.Gray var. fructuosa (Gilbert) Wherry
             Dryopteris spinulosa (O.F.Müll.) Watt var. fructuosa (Gilbert) Trudell
             Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. fructuosa (Gilbert) Fernald
    Dryopteris X uliginosa (A.Braun ex Dowell) Druce X +
        spinulose crested wood fern
             Dryopteris cristata (L.) A.Gray X D. spinulosa (O.F.Müll.) Watt
  Genus: Gymnocarpium

    Gymnocarpium dryopteris (L.) Newman*+
        common oak fern, western oak fern
             Dryopteris disjuncta (Rupr.) C.V.Morton
             Dryopteris dryopteris (L.) Britton
             Dryopteris linnaeana C.Chr.
             Lastrea dryopteris (L.) Bory
             Polypodium dryopteris L.
             Phegopteris dryopteris (L.) Fée
             Thelypteris dryopteris (L.) Sloss.
    Gymnocarpium robertianum (Hoffm.) Newman*+
        limestone oak fern, scented oak fern
             Dryopteris robertiana (Hoffm.) C.Chr.
             Gymnocarpium dryopteris (L.) Newman var. pumilum (DC.) B.Boivin
             Polypodium robertianum Hoffm.
             Phegopteris robertiana (Hoffm.) Fée
             Thelypteris robertiana (Hoffm.) Sloss.
    Gymnocarpium X intermedium Sarvela X +
        intermediate oak fern
             Dryopteris linnaeana C.Chr. f. glandulosa R.M.Tryon
Family: Polypodiaceae
Family: Pteridaceae
Family: Thelypteridaceae
  Genus: Phegopteris

    Phegopteris connectilis (Michx.) Watt*+
        Narrow beech fern, northern beech fern
             Dryopteris phegopteris (L.) C.Chr.
             Polypodium connectile Michx.
             Polypodium phegopteris L.
             Phegopteris polypodioides Fée
             Thelypteris phegopteris (L.) Sloss.
    Phegopteris hexagonoptera (Michx.) Fée*+
        broad beech fern, southern beech fern
             Dryopteris hexagonoptera (Michx.) C.Chr.
             Polypodium hexagonopterum Michx.
             Thelypteris hexagonoptera (Michx.) Nieuwl.
  Genus: Thelypteris

    Thelypteris palustris Schott var. pubescens (Lawson) Fernald*+
        eastern marsh fern, marsh fern
             Dryopteris thelypteris auct. non (L.) Sw.
             Dryopteris thelypteris (L.) A.Gray var. haleana (Fernald) M.Broun & Weath.
             Dryopteris thelypteris (L.) A.Gray var. pubescens (G.Lawson) Weath.
             Lastrea thelypteris (L.) Bory var. pubescens Lawson
             Thelypteris confluens (Thunb.) C.V.Morton var. pubescens (Lawson) Pringle
             Thelypteris palustris Schott var. haleana Fernald
    Thelypteris simulata (Davenp.) Nieuwl.*+
        bog fern, Massachusetts fern
             Aspidium simulatum Davenp.
             Dryopteris simulata Davenp.
             Parathelypteris simulata (Davenp.) Holttum

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