| Common Name | Scientific Name | Code |
| n/a | Sphaerostephanos heterocarpus (Blume) Holttum | SPHE8 |
| n/a | Sphaerostephanos J. Smith | SPHAE9 |
| n/a | Sphaerostephanos maemonensis (W. H. Wagner & Grether) Holttum | SPMA14 |
| n/a | Thelypteris ?incesta W.H. Wagner [dentata ? parasitica] | THIN14 |
| n/a | Thelypteris ?invisa (Sw.) Proctor (pro sp.) [grandis ? serra] | THIN4 |
| n/a | Thelypteris ?palmeri W.H. Wagner [cyatheoides ? dentata] | THPA13 |
| n/a | Thelypteris ?rolandii (C. Christens.) R. Tryon [poiteana ? tetragona] | THRO2 |
| n/a | Thelypteris acuminata (Houtt.) Morton [excluded] | THAC6 |
| n/a | Thelypteris asterothrix (F?e) Proctor [excluded] | THAS3 |
| n/a | Thelypteris gretheri (W. H. Wagner) Stone | THGR10 |
| n/a | Thelypteris guamensis (Holttum) Fosberg & Sachet | THGU2 |
| n/a | Thelypteris maemonensis (W. H. Wagner & Grether) Stone | THMA13 |
| n/a | Thelypteris oligocarpa (Humb. & Bonpl. ex Willd.) Ching [excluded] | THOL4 |
| n/a | Thelypteris patens (Sw.) Small ex R. St. John var. smithiana Ponce [excluded] | THPAS4 |
| n/a | Thelypteris subpubescens (Blume) Iwatsuki | THSU9 |
| n/a | Thelypteris truncata (Poir.) K. Iwats. [excluded] | THTR11 |
| n/a | Thelypteris unita (L.) Morton | THUN5 |
| n/a | Thelypteris warburgii (Kuhn & H. Christ) Stone | THWA2 |
| abrupttip maiden fern | Thelypteris augescens (Link) Munz & Johnston | THAU |
| air fern | Pneumatopteris Nakai | PNEUM |
| Alabama maiden fern | Thelypteris pilosa (Mart. & Gal.) Crawford var. alabamensis Crawford | THPIA |
| arrowhead maiden fern | Thelypteris hastata (F?e) Proctor | THHA |
| arrowhead maiden fern | Thelypteris hastata (F?e) Proctor var. hastata | THHAH |
| arrowhead maiden fern | Thelypteris hastata (F?e) Proctor var. heterodoxa Proctor | THHAH2 |
| Balbis's maiden fern | Thelypteris balbisii (Spreng.) Ching | THBA2 |
| Barrio Charcas maiden fern | Thelypteris verecunda Proctor | THVE2 |
| beechfern | Phegopteris F | PHEGO |
| bog fern | Thelypteris simulata (Davenport) Nieuwl. | THSI2 |
| Boyd's maiden fern | Thelypteris boydiae (D.C. Eat.) K. Iwats. | THBO |
| Britton's maiden fern | Thelypteris brittonae (Slosson ex Maxon) Alain | THBR2 |
| broad beechfern | Phegopteris hexagonoptera (Michx.) F | PHHE11 |
| broadleaf maiden fern | Thelypteris angustifolia (Willd.) Proctor | THAN |
| Caribbean maiden fern | Thelypteris sancta (L.) Ching | THSA3 |
| cordillera maiden fern | Thelypteris inabonensis Proctor | THIN3 |
| creeping maiden fern | Thelypteris reptans (J.F. Gmel.) Morton | THRE3 |
| creeping maiden fern | Thelypteris reptans (J.F. Gmel.) Morton var. reptans | THRER |
| creeping maiden fern | Thelypteris reptans (J.F. Gmel.) Morton var. tenera (F?e) Proctor | THRET |
| Cuban maiden fern | Thelypteris piedrensis (C. Christens.) Morton | THPI2 |
| darkgreen maiden fern | Thelypteris poiteana (Bory) Proctor | THPO5 |
| deltoid maiden fern | Thelypteris deltoidea (Sw.) Proctor | THDE3 |
| downy maiden fern | Thelypteris dentata (Forssk.) E. St. John | THDE4 |
| eastern marsh fern | Thelypteris palustris Schott | THPA |
| eastern marsh fern | Thelypteris palustris Schott var. pubescens (Lawson) Fern. | THPAP |
| fairybit maiden fern | Thelypteris abrupta (Desv.) Proctor | THAB2 |
| false beech fern | Pseudophegopteris keraudreniana (Gaud.) Holttum | PSKE |
| Forster's maiden fern | Thelypteris forsteri Morton | THFO |
| freetip maiden fern | Thelypteris tetragona (Sw.) Small | THTE5 |
| German's maiden fern | Thelypteris germaniana (F?e) Proctor | THGE |
| glandular maiden fern | Thelypteris decussata (L.) Proctor | THDE2 |
| globular maiden fern | Thelypteris globulifera (Brack.) C.F. Reed | THGL |
| graceful maiden fern | Thelypteris pennata (Poir.) Morton | THPE2 |
| graygreen maiden fern | Thelypteris nephrodioides (Klotzsch) Proctor | THNE2 |
| gridscale maiden fern | Thelypteris patens (Sw.) Small ex R. St. John | THPA5 |
| Guadeloupe maiden fern | Thelypteris guadalupensis (Wikstr.) Proctor | THGU |
| Hawai'i air fern | Pneumatopteris sandwicensis (Brack.) Holttum | PNSA |
| heartleaf maiden fern | Thelypteris cordata (F?e) Proctor | THCO4 |
| heartleaf maiden fern | Thelypteris cordata (F?e) Proctor var. cordata (F?e) Proctor [excluded] | THCOC3 |
| heartleaf maiden fern | Thelypteris cordata (F?e) Proctor var. imitata (C. Christens.) Proctor | THCOI |
| Hudson's air fern | Pneumatopteris hudsoniana (Brack.) Holttum | PNHU |
| Jamaican maiden fern | Thelypteris serra (Sw.) R. St. John | THSE2 |
| jeweled maiden fern | Thelypteris opulenta (Kaulfuss) Fosberg | THOP2 |
| Kunth's maiden fern | Thelypteris kunthii (Desv.) Morton | THKU |
| lacy maiden fern | Thelypteris cyatheoides (Kaulfuss) Fosberg | THCY |
| latticevein fern | Thelypteris reticulata (L.) Proctor | THRE5 |
| limestone maiden fern | Thelypteris hildae Proctor | THHI2 |
| Lindheimer's marsh fern | Thelypteris ovata R. St. John var. lindheimeri (C. Christens.) A.R. Sm. | THOVL |
| Link's maiden fern | Thelypteris linkiana (K. Presl) R. Tryon | THLI2 |
| lip maiden fern | Thelypteris cheilanthoides (Kunze) Proctor | THCH |
| long beechfern | Phegopteris connectilis (Michx.) Watt | PHCO24 |
| macrothelypteris | Macrothelypteris (H. It?) Ching | MACRO3 |
| Macrothelypteris torresiana | Dryopteris setigera auct. non Blume [misapplied] | DRSE |
| Macrothelypteris torresiana | Dryopteris uliginosa (Kunze) C. Christens., non (A. Braun ex Dowell) Druce | DRUL |
| Macrothelypteris torresiana | Thelypteris torresiana (Gaud.) Alston | THTO |
| maiden fern | Thelypteris Schmidel | THELY2 |
| Makaleha maiden fern | Thelypteris exindusiata W.H. Wagner | THEX2 |
| Maricao maiden fern | Thelypteris namophila Proctor | THNA |
| New York fern | Thelypteris noveboracensis (L.) Nieuwl. | THNO |
| oppositeleaf maiden fern | Thelypteris opposita (Vahl) Ching | THOP |
| ovate marsh fern | Thelypteris ovata R. St. John | THOV |
| ovate marsh fern | Thelypteris ovata R. St. John var. ovata | THOVO |
| parasitic maiden fern | Thelypteris parasitica (L.) Fosberg | THPA4 |
| Phegopteris connectilis | Dryopteris phegopteris (L.) C. Christens. | DRPH2 |
| Phegopteris connectilis | Lastrea phegopteris (L.) Bory | LAPH |
| Phegopteris connectilis | Phegopteris polypodioides F | PHPO9 |
| Phegopteris connectilis | Thelypteris phegopteris (L.) Slosson | THPH |
| Phegopteris hexagonoptera | Dryopteris hexagonoptera (Michx.) C. Christens. | DRHE3 |
| Phegopteris hexagonoptera | Thelypteris hexagonoptera (Michx.) Weatherby | THHE |
| Pneumatopteris hudsoniana | Thelypteris hudsoniana (Brack.) C.F. Reed | THHU |
| Pneumatopteris sandwicensis | Cyclosorus sandwicensis (Brack.) Copeland | CYSA5 |
| Pneumatopteris sandwicensis | Dryopteris stegnogrammoides (Baker) C. Christens. | DRST7 |
| Pneumatopteris sandwicensis | Thelypteris hawaiiensis C.F. Reed | THHA2 |
| pseudophegopteris | Pseudophegopteris Ching | PSEUD8 |
| Puerto Rico maiden fern | Thelypteris yaucoensis Proctor | THYA |
| queen's-veil maiden fern | Thelypteris quelpaertensis (Christ) Ching | THQU2 |
| red maiden fern | Thelypteris rudis (Kunze) Proctor | THRU |
| resinous maiden fern | Thelypteris resinifera (Desv.) Proctor | THRE4 |
| Rio Abajo maiden fern | Thelypteris abdita Proctor | THAB |
| Rio Inabon maiden fern | Thelypteris rheophyta Proctor | THRH2 |
| roughhairy maiden fern | Thelypteris hispidula (Dcne.) C.F. Reed | THHI |
| roughhairy maiden fern | Thelypteris hispidula (Dcne.) C.F. Reed var. hispidula | THHIH |
| roughhairy maiden fern | Thelypteris hispidula (Dcne.) C.F. Reed var. inconstans (C. Christens.) Proctor | THHII |
| roughhairy maiden fern | Thelypteris hispidula (Dcne.) C.F. Reed var. versicolor (R. St. John) Lellinger | THHIV |
| showy maiden fern | Thelypteris puberula (Baker) Morton | THPU |
| Sierra marsh fern | Thelypteris nevadensis (Baker) Clute ex Morton | THNE |
| softhairy maiden fern | Thelypteris pilosa (Mart. & Gal.) Crawford | THPI3 |
| Sonoran maiden fern | Thelypteris puberula (Baker) Morton var. sonorensis A.R. Sm. | THPUS |
| spleenwort maiden fern | Thelypteris retroflexa (L.) Proctor & Lourteig | THRE8 |
| stately maiden fern | Thelypteris grandis A.R. Sm. | THGR |
| stiff maiden fern | Thelypteris sclerophylla (Poepp. ex Spreng.) Morton | THSC |
| swordfern | Macrothelypteris torresiana (Gaud.) Ching | MATO3 |
| Thelypteris ?incesta | Cyclosorus ?incestus (W.H. Wagner) W.H. Wagner | CYIN13 |
| Thelypteris ?invisa | Aspidium invisum Sw. | ASIN22 |
| Thelypteris ?invisa | Dryopteris oligophylla Maxon | DROL2 |
| Thelypteris ?invisa | Thelypteris oligophylla (Maxon) Proctor | THOL |
| Thelypteris ?palmeri | Cyclosorus ?palmeri (W.H. Wagner) W.H. Wagner | CYPA25 |
| Thelypteris ?rolandii | Dryopteris rolandii C. Christens. | DRRO4 |
| Thelypteris abrupta | Polypodium abruptum Desv. | POAB5 |
| Thelypteris angustifolia | Dryopteris angustifolia (Willd.) Urban | DRAN4 |
| Thelypteris augescens | Dryopteris augescens (Link) C. Christens. | DRAU6 |
| Thelypteris augescens | Lastrea augescens (Link) J. Sm. | LAAU2 |
| Thelypteris balbisii | Dryopteris sprengelii (Kaulfuss) Kuntze | DRSP8 |
| Thelypteris balbisii | Thelypteris sprengelii (Kaulfuss) Proctor | THSP2 |
| Thelypteris boydiae | Christella boydiae (D.C. Eat.) Holttum | CHBO10 |
| Thelypteris boydiae | Cyclosorus boydiae (D.C. Eat.) W.H. Wagner | CYBO5 |
| Thelypteris boydiae | Cyclosorus boydiae (D.C. Eat.) W.H. Wagner var. kipahuluensis W.H. Wagner & A.C. Medeiros | CYBOK |
| Thelypteris brittonae | Dryopteris brittonae Slosson ex Maxon | DRBR5 |
| Thelypteris cheilanthoides | Aspidium cheilanthoides Kunze | ASCH10 |
| Thelypteris cordata var. cordata | Dryopteris cordata (F?e) Urban [excluded] | DRCO8 |
| Thelypteris cordata var. imitata | Dryopteris imitata C. Christens. | DRIM |
| Thelypteris cyatheoides | Christella cyatheoides (Kaulfuss) Holttum | CHCY5 |
| Thelypteris cyatheoides | Cyclosorus cyatheoides (Kaulfuss) Farw. | CYCY6 |
| Thelypteris cyatheoides | Dryopteris cyatheoides (Kaulfuss) Kuntze | DRCY2 |
| Thelypteris decussata | Dryopteris decussata (L.) Urban | DRDE7 |
| Thelypteris deltoidea | Dryopteris deltoidea (Sw.) Kuntze | DRDE8 |
| Thelypteris dentata | Christella dentata (Forsskal) Brownsey & Jermy | CHDE21 |
| Thelypteris dentata | Cyclosorus dentatus (Forssk.) Ching | CYDE11 |
| Thelypteris dentata | Dryopteris dentata (Forssk.) C. Christens. | DRDE4 |
| Thelypteris dentata | Thelypteris reducta Small ex R. St. John | THRE6 |
| Thelypteris exindusiata | Cyclosorus exindusiatus (W.H. Wagner) W.H. Wagner | CYEX |
| Thelypteris forsteri | Sphaerostephanos invisus (G. Forst.) Holttum | SPIN9 |
| Thelypteris germaniana | Dryopteris germaniana (F?e) C. Christens. | DRGE |
| Thelypteris globulifera | Dryopteris globulifera (Brack.) Kuntze | DRGL4 |
| Thelypteris globulifera | Lastrea globulifera Brack. | LAGL9 |
| Thelypteris guadalupensis | Dryopteris domingensis (Spreng.) Maxon | DRDO4 |
| Thelypteris guadalupensis | Dryopteris guadalupensis (Wikstr.) C. Christens. | DRGU |
| Thelypteris hastata var. hastata | Dryopteris hastata (F?e) Urban | DRHA2 |
| Thelypteris hispidula var. inconstans | Thelypteris quadrangularis (F?e) Schelpe var. inconstans (C. Christens.) A.R. Sm. | THQUI |
| Thelypteris hispidula var. versicolor | Cyclosorus quadrangularis (F?e) Tardieu-Blot p.p. | CYQU2 |
| Thelypteris hispidula var. versicolor | Dryopteris macilenta (E. St. John) Correll | DRMA5 |
| Thelypteris hispidula var. versicolor | Dryopteris versicolor (R. St. John) Broun | DRVE4 |
| Thelypteris hispidula var. versicolor | Thelypteris macilenta E. St. John | THMA7 |
| Thelypteris hispidula var. versicolor | Thelypteris quadrangularis (F?e) Schelpe var. versicolor (R. St. John) A.R. Sm. | THQUV |
| Thelypteris hispidula var. versicolor | Thelypteris versicolor R. St. John | THVE4 |
| Thelypteris interrupta | Cyclosorus gongylodes (Schkuhr) Link | CYGO2 |
| Thelypteris interrupta | Dryopteris gongylodes (Schkuhr) Kuntze | DRGO2 |
| Thelypteris interrupta | Thelypteris gongylodes (Schkuhr) Small | THGO |
| Thelypteris interrupta | Thelypteris totta (Thunb.) Schelpe | THTO2 |
| Thelypteris kunthii | Dryopteris normalis C. Christens. | DRNO3 |
| Thelypteris kunthii | Dryopteris saxatilis (R. St. John) Broun | DRSA2 |
| Thelypteris kunthii | Thelypteris macrorhizoma E. St. John | THMA6 |
| Thelypteris kunthii | Thelypteris normalis (C. Christens.) Moxley | THNO2 |
| Thelypteris kunthii | Thelypteris saxatilis R. St. John | THSA4 |
| Thelypteris kunthii | Thelypteris unca R. St. John | THUN |
| Thelypteris leptocladia | Dryopteris leptocladia (F?e) Maxon | DRLE6 |
| Thelypteris linkiana | Dryopteris linkiana (K. Presl) Maxon | DRLI3 |
| Thelypteris nevadensis | Dryopteris nevadensis (Baker) Underwood | DRNE7 |
| Thelypteris nevadensis | Dryopteris oregana C. Christens. | DROR2 |
| Thelypteris nevadensis | Lastrea oregana (C. Christens.) Copeland | LAOR4 |
| Thelypteris noveboracensis | Dryopteris noveboracensis (L.) Gray | DRNO4 |
| Thelypteris noveboracensis | Polypodium noveboracense L. | PONO6 |
| Thelypteris noveboracensis | Thelypteris thelypterioides (Michx.) Holub | THTH |
| Thelypteris opposita | Dryopteris opposita (Vahl) Urban | DROP |
| Thelypteris ovata var. lindheimeri | Dryopteris augescens (Link) C. Christens. var. lindheimeri (C. Christens.) Broun | DRAUL2 |
| Thelypteris ovata var. lindheimeri | Thelypteris ?lindheimeri (C. Christens.) Wherry | THLI5 |
| Thelypteris ovata var. ovata | Thelypteris normalis (C. Christens.) Moxley var. harperi (C. Christens.) Wherry | THNOH |
| Thelypteris palustris var. pubescens | Dryopteris thelypteris (L.) Sw. var. haleana (Fern.) Broun & Weatherby | DRTHH |
| Thelypteris palustris var. pubescens | Dryopteris thelypteris (L.) Sw. var. pubescens (Lawson) A.R. Prince ex Weatherby | DRTHP |
| Thelypteris palustris var. pubescens | Dryopteris thelypteris auct. non (L.) Sw. [misapplied] | DRTH4 |
| Thelypteris palustris var. pubescens | Thelypteris confluens (Thunb.) Morton var. pubescens (Lawson) Pringle | THCOP |
| Thelypteris palustris var. pubescens | Thelypteris palustris Schott var. haleana Fern. | THPAH |
| Thelypteris parasitica | Christella parasitica (L.) L?v. | CHPA41 |
| Thelypteris parasitica | Dryopteris parasitica (L.) Kuntze | DRPA14 |
| Thelypteris patens | Dryopteris patens (Sw.) Kuntze | DRPA15 |
| Thelypteris patens | Thelypteris patens (Sw.) Small ex R. St. John var. scabriuscula (K. Presl) A.R. Sm. | THPAS |
| Thelypteris pennata | Dryopteris megalodus (Schkuhr) Urban | DRME2 |
| Thelypteris pennata | Thelypteris megalodus (Schkuhr) Proctor | THME2 |
| Thelypteris piedrensis | Dryopteris piedrensis C. Christens. | DRPI3 |
| Thelypteris pilosa var. alabamensis | Leptogramma pilosa sensu (Mart. & Gal.) Underwood p.p. | LEPI4 |
| Thelypteris pilosa var. alabamensis | Leptogramma pilosa sensu (Mart. & Gal.) Underwood var. alabamensis (Crawford) Wherry | LEPIA2 |
| Thelypteris poiteana | Dryopteris poiteana (Bory) Urban | DRPO4 |
| Thelypteris quelpaertensis | Dryopteris oreopteris auct. non (Ehrh.) Maxon [misapplied] | DROR3 |
| Thelypteris quelpaertensis | Lastrea limbosperma (All.) Heywood | LALI7 |
| Thelypteris quelpaertensis | Oreopteris limbosperma auct. non (All.) Holub [misapplied] | ORLI4 |
| Thelypteris quelpaertensis | Oreopteris quelpaertensis (Christ) Holub | ORQU |
| Thelypteris quelpaertensis | Polypodium limbospermum auct. non All. [misapplied] | POLI11 |
| Thelypteris quelpaertensis | Thelypteris limbosperma auct. non (All.) Fuchs [misapplied] | THLI9 |
| Thelypteris reptans var. reptans | Dryopteris reptans (J.F. Gmel.) C. Christens. | DRRE3 |
| Thelypteris reptans var. reptans | Dryopteris reptans (J.F. Gmel.) C. Christens. var. conformis C. Christens. | DRREC |
| Thelypteris reptans var. reptans | Goniopteris reptans (J.F. Gmel.) K. Presl | GORE6 |
| Thelypteris reptans var. tenera | Goniopteris tenera F | GOTE6 |
| Thelypteris resinifera | Dryopteris resinifera (Desv.) Weatherby | DRRE4 |
| Thelypteris reticulata | Dryopteris reticulata (L.) Urban | DRRE5 |
| Thelypteris reticulata | Meniscium reticulatum (L.) Sw. | MERE4 |
| Thelypteris retroflexa | Thelypteris asplenioides (Sw.) Proctor | THAS |
| Thelypteris sancta | Dryopteris sancta (L.) Kuntze | DRSA3 |
| Thelypteris sancta | Thelypteris sancta (L.) Ching var. portoricensis (C. Christens.) Morton | THSAP |
| Thelypteris sclerophylla | Dryopteris sclerophylla (Poepp. ex Spreng.) C. Christens. | DRSC2 |
| Thelypteris sclerophylla | Goniopteris sclerophylla (Poepp. ex Spreng.) Wherry | GOSC |
| Thelypteris serra | Dryopteris serra (Sw.) Kuntze | DRSE4 |
| Thelypteris serrata | Dryopteris serrata (Cav.) C. Christens. | DRSE5 |
| Thelypteris serrata | Meniscium serratum Cav. | MESE4 |
| Thelypteris simulata | Dryopteris simulata Davenport | DRSI3 |
| Thelypteris tetragona | Dryopteris subtetragona (Link) Maxon | DRSU5 |
| Thelypteris tetragona | Goniopteris tetragona (Sw.) K. Presl | GOTE5 |
| Thelypteris wailele | Cyclosorus wailele (T. Flynn) W.H. Wagner | CYWA14 |
| thicket maiden fern | Thelypteris leptocladia (F?e) Proctor | THLE2 |
| toothed latticevein fern | Thelypteris serrata (Cav.) Alston | THSE3 |
| Waioli Valley maiden fern | Thelypteris wailele T. Flynn | THWA |
| Willdenow's maiden fern | Thelypteris interrupta (Willd.) K. Iwats. | THIN2 |