| Common Name | Scientific Name | Code |
| n/a | Adiantum ?tracyi C.C. Hall ex W.H. Wagner [aleuticum ? jordanii] | ADTR3 |
| n/a | Adiantum hirsutum Bory [excluded] | ADHI3 |
| n/a | Adiantum philippense L. | ADPH |
| n/a | Cheilanthes ?fibrillosa (Davenport) Davenport ex Underwood (pro sp.) [covillei ? newberryi] | CHFI |
| n/a | Cheilanthes ?parishii Davenport (pro sp.) [covillei ? parryi] | CHPA3 |
| n/a | Cheilanthes pyramidalis F?e [excluded] | CHPY6 |
| n/a | Cheilanthes tenuifolia (Burm. f.) Sw. | CHTE12 |
| n/a | Cryptogramma crispa (L.) R. Br. ex Hook. [excluded] | CRCR16 |
| n/a | Notholaena schaffneri (Fourn.) Underwood ex Davenport [excluded] | NOSC2 |
| n/a | Pellaea ?glaciogena W.H. Wagner, Pray & A.R. Smith [bridgesii ? mucronata] | PEGL17 |
| n/a | Pellaea sagittata (Cav.) Link [excluded] | PESA19 |
| n/a | Pityrogramma ?mackenneyi W.H. Wagner [austroamericana ? calomelanos] | PIMA12 |
| n/a | Pteris ?delchampsii W.H. Wagner & C.E. Nauman [bahamensis ? vittata] | PTDE2 |
| n/a | Pteris ?hillebrandii Copeland [cretica ? irregularis] | PTHI |
| n/a | Pteris spinescens C. Presl | PTSP |
| Acrostichum danaeifolium | Acrostichum excelsum Maxon | ACEX2 |
| Adiantum aleuticum | Adiantum pedatum L. ssp. aleuticum (Rupr.) Calder & Taylor | ADPEA2 |
| Adiantum aleuticum | Adiantum pedatum L. ssp. calderi Cody | ADPEC |
| Adiantum aleuticum | Adiantum pedatum L. ssp. subpumilum (W.H. Wagner) Lellinger | ADPES |
| Adiantum aleuticum | Adiantum pedatum L. var. aleuticum Rupr. | ADPEA |
| Adiantum aleuticum | Adiantum pedatum L. var. subpumilum W.H. Wagner | ADPES2 |
| Adiantum capillus-veneris | Adiantum capillus-veneris L. var. modestum (Underwood) Fern. | ADCAM |
| Adiantum capillus-veneris | Adiantum capillus-veneris L. var. protrusum Fern. | ADCAP |
| Adiantum capillus-veneris | Adiantum modestum Underwood | ADMO2 |
| Adiantum fragile var. rigidulum | Adiantum rigidulum Mett. ex Kuhn | ADRI2 |
| Adiantum pyramidale | Adiantum cristatum L. | ADCR |
| Adiantum raddianum | Adiantum cuneatum Langsd. & Fisch. | ADCU |
| Alabama lipfern | Cheilanthes alabamensis (Buckl.) Kunze | CHAL5 |
| Aleutian maidenhair | Adiantum aleuticum (Rupr.) Paris | ADAL |
| American rockbrake | Cryptogramma acrostichoides R. Br. | CRAC3 |
| anopteris | Anopteris Prantl ex Diels | ANOPT |
| Anopteris hexagona ssp. intermedia | Adiantum hexagona auct. p.p., non L. | ADHE |
| Anopteris hexagona ssp. intermedia | Onychium strictum auct. non Kunze [misapplied] | ONST |
| Argyrochosma dealbata | Cheilanthes dealbata Pursh | CHDE10 |
| Argyrochosma dealbata | Notholaena dealbata (Pursh) Kunze | NODE |
| Argyrochosma dealbata | Pellaea dealbata (Pursh) Prantl | PEDE18 |
| Argyrochosma fendleri | Cheilanthes cancellata Mickel | CHCA19 |
| Argyrochosma fendleri | Notholaena fendleri Kunze | NOFE |
| Argyrochosma fendleri | Pellaea fendleri (Kunze) Prantl | PEFE4 |
| Argyrochosma incana | Notholaena incana K. Presl | NOIN4 |
| Argyrochosma jonesii | Cheilanthes jonesii (Maxon) Munz | CHJO2 |
| Argyrochosma jonesii | Notholaena jonesii Maxon | NOJO |
| Argyrochosma jonesii | Pellaea jonesii (Maxon) Morton | PEJO3 |
| Argyrochosma limitanea ssp. limitanea | Cheilanthes limitanea (Maxon) Mickel | CHLI7 |
| Argyrochosma limitanea ssp. limitanea | Notholaena limitanea Maxon | NOLI2 |
| Argyrochosma limitanea ssp. limitanea | Pellaea limitanea (Maxon) Morton | PELI12 |
| Argyrochosma limitanea ssp. mexicana | Cheilanthes limitanea (Maxon) Mickel var. mexicana (Maxon) Mickel | CHLIM |
| Argyrochosma limitanea ssp. mexicana | Notholaena limitanea Maxon ssp. mexicana Maxon | NOLIM2 |
| Argyrochosma limitanea ssp. mexicana | Notholaena limitanea Maxon var. mexicana (Maxon) Broun | NOLIM |
| Argyrochosma limitanea ssp. mexicana | Pellaea limitanea (Maxon) Morton var. mexicana (Maxon) Morton | PELIM2 |
| Argyrochosma microphylla | Cheilanthes parvifolia (R. Tryon) Mickel | CHPA32 |
| Argyrochosma microphylla | Notholaena parvifolia R. Tryon | NOPA3 |
| Argyrochosma microphylla | Pellaea microphylla Mett. ex Kuhn | PEMI10 |
| Arizona lipfern | Cheilanthes arizonica (Maxon) Mickel | CHAR7 |
| Arizona scaly cloakfern | Astrolepis cochisensis (Goodding) Benham & Windham ssp. arizonica Benham | ASCOA2 |
| Arizonia cliffbrake | Pellaea ternifolia (Cav.) Link ssp. arizonica Windham | PETEA |
| Asian brake | Pteris mutilata L. | PTMU2 |
| Aspidotis californica | Cheilanthes californica (Hook.) Mett. | CHCA20 |
| Aspidotis carlotta-halliae | Cheilanthes carlotta-halliae Wagner & Gilbert | CHCA21 |
| Aspidotis densa | Cheilanthes siliquosa Maxon | CHSI3 |
| Aspidotis densa | Cryptogramma densa (Brack.) Diels | CRDE10 |
| Aspidotis densa | Onychium densum Brack. | ONDE |
| Aspidotis densa | Pellaea densa (Brack.) Hook. | PEDE13 |
| Astrolepis cochisensis ssp. cochisensis | Cheilanthes cochisensis (Goodding) Mickel | CHCO15 |
| Astrolepis cochisensis ssp. cochisensis | Cheilanthes sinuata (Lag. ex Sw.) Domin var. cochisensis (Goodding) Munz | CHSIC |
| Astrolepis cochisensis ssp. cochisensis | Notholaena cochisensis Goodding | NOCO2 |
| Astrolepis cochisensis ssp. cochisensis | Notholaena sinuata (Lag. ex Sw.) Kaulfuss var. cochisensis (Goodding) Weatherby | NOSIC2 |
| Astrolepis integerrima | Cheilanthes integerrima (Hook.) Mickel | CHIN8 |
| Astrolepis integerrima | Notholaena integerrima (Hook.) Hevly | NOIN2 |
| Astrolepis integerrima | Notholaena sinuata (Lag. ex Sw.) Kaulfuss var. integerrima Hook. | NOSII2 |
| Astrolepis sinuata ssp. sinuata | Cheilanthes sinuata (Lag. ex Sw.) Domin | CHSI4 |
| Astrolepis sinuata ssp. sinuata | Notholaena sinuata (Lag. ex Sw.) Kaulfuss | NOSI |
| Australian brake | Pteris tremula R.Br. | PTTR3 |
| Bahama brake | Pteris bahamensis (J.G. Agardh) F | PTBA |
| beaded lipfern | Cheilanthes wootonii Maxon | CHWO |
| birdfoot cliffbrake | Pellaea mucronata (D.C. Eat.) D.C. Eat. | PEMU |
| birdfoot cliffbrake | Pellaea mucronata (D.C. Eat.) D.C. Eat. ssp. mucronata | PEMUM |
| bommeria fern | Bommeria Fourn. | BOMME |
| Bommeria hispida | Gymnopteris hispida (Mett. ex Kuhn) Underwood | GYHI |
| brake fern | Pteris L. | PTERI2 |
| Brewer's cliffbrake | Pellaea breweri D.C. Eat. | PEBR4 |
| Bridges's cliffbrake | Pellaea bridgesii Hook. | PEBR5 |
| broadleaf maidenhair | Adiantum latifolium Lam. | ADLA |
| California cliffbrake | Pellaea mucronata (D.C. Eat.) D.C. Eat. ssp. californica (Lemmon) Windham | PEMUC2 |
| California cloak fern | Notholaena californica D.C. Eat. | NOCA |
| California cloak fern | Notholaena californica D.C. Eat. ssp. californica | NOCAC2 |
| California cloak fern | Notholaena californica D.C. Eat. ssp. leucophylla Windham | NOCAL |
| California lacefern | Aspidotis californica (Hook.) Nutt. ex Copeland | ASCA5 |
| California maidenhair | Adiantum jordanii C. Muell. | ADJO |
| Cascade rockbrake | Cryptogramma cascadensis E.R. Alverson | CRCA23 |
| Cheilanthes alabamensis | Pellaea alabamensis (Buckl.) Baker ex Hook. | PEAL15 |
| Cheilanthes arizonica | Cheilanthes pyramidalis F?e var. arizonica (Maxon) Broun | CHPYA |
| Cheilanthes bonariensis | Notholaena aurea (Poir.) Desv. | NOAU |
| Cheilanthes eatonii | Cheilanthes castanea Maxon | CHCA11 |
| Cheilanthes gracillima | Cheilanthes gracillima D.C. Eat. var. aberrans M.E. Jones | CHGRA |
| Cheilanthes lanosa | Cheilanthes vestita (Spreng.) Sw. | CHVE9 |
| Cheilanthes newberryi | Notholaena newberryi D.C. Eat. | NONE2 |
| Cheilanthes parryi | Notholaena parryi D.C. Eat. | NOPA2 |
| Cheilanthes paupercula | Adiantopsis paupercula (Kunze) F | ADPA2 |
| Cheilanthes viridis | Pellaea viridis (Forssk.) Prantl | PEVI7 |
| chestnuthair fern | Eriosorus hispidulus (Kunze) Vareschi | ERHI5 |
| Chihuahua scaly cloakfern | Astrolepis cochisensis (Goodding) Benham & Windham ssp. chihuahuaensis Benham | ASCOC2 |
| Cleveland's lipfern | Cheilanthes clevelandii D.C. Eat. | CHCL |
| cliffbrake | Pellaea Link | PELLA |
| cloak fern | Notholaena R. Br. | NOTHO |
| cloakfern | Astrolepis Benham & Windham | ASTRO |
| coastal lipfern | Cheilanthes intertexta (Maxon) Maxon | CHIN |
| Cochise scaly cloakfern | Astrolepis cochisensis (Goodding) Benham & Windham | ASCO42 |
| Cochise scaly cloakfern | Astrolepis cochisensis (Goodding) Benham & Windham ssp. cochisensis | ASCOC3 |
| coffee cliffbrake | Pellaea andromedifolia (Kaulfuss) F | PEAN2 |
| common maidenhair | Adiantum capillus-veneris L. | ADCA |
| coniogramme | Coniogramme F | CONIO2 |
| Cooper's lipfern | Cheilanthes cooperae D.C. Eat. | CHCO3 |
| Copeland's cloak fern | Notholaena copelandii C.C. Hall | NOCO5 |
| copper fern | Bommeria hispida (Mett. ex Kuhn) Underwood | BOHI |
| Coville's lipfern | Cheilanthes covillei Maxon | CHCO4 |
| Cretan brake | Pteris cretica L. | PTCR2 |
| Cretan brake | Pteris cretica L. var. albolineata Hook. | PTCRA |
| Cretan brake | Pteris cretica L. var. cretica | PTCRC |
| Cryptogramma acrostichoides | Cryptogramma crispa (L.) R. Br. ex Hook. ssp. acrostichoides (R. Br.) Hult | CRCRA2 |
| Cryptogramma sitchensis | Cryptogramma crispa (L.) R. Br. ex Hook. var. sitchensis (Rupr.) C. Christens. | CRCRS |
| delta maidenhair | Adiantum raddianum K. Presl | ADRA |
| diamond maidenhair | Adiantum trapeziforme L. | ADTR4 |
| digit fern | Doryopteris pedata (L.) F | DOPE |
| Dixie silverback fern | Pityrogramma calomelanos (L.) Link | PICA4 |
| doryopteris | Doryopteris J. Sm. | DORYO |
| Doryopteris decipiens | Cheilanthes decipiens (Hook.) W.H. Wagner | CHDE17 |
| Doryopteris decipiens | Doryopteris decora Brack. var. decipiens (Hook.) R. Tryon | DODED |
| Doryopteris decora | Cheilanthes decora (Brack.) R.& A. Tryon | CHDE5 |
| Doryopteris takeuchii | Cheilanthes takeuchii W.H. Wagner | CHTA3 |
| double edge maidenhair | Adiantum anceps Maxon & Morton | ADAN2 |
| Eaton's lipfern | Cheilanthes eatonii Baker | CHEA |
| elephantleaf brake | Pteris grandifolia L. | PTGR |
| eriosorus | Eriosorus F | ERIOS |
| Eriosorus hispidulus | Psilogramme hispidulus (Kunze) Kuhn | PSHI |
| Eriosorus hispidulus | Psilogramme portoricensis Maxon | PSPO2 |
| fairyswords | Cheilanthes lindheimeri Hook. | CHLI |
| false cloak fern | Argyrochosma (Sm.) Windham | ARGYR5 |
| fan maidenhair | Adiantum tenerum Sw. | ADTE |
| Fendler's false cloak fern | Argyrochosma fendleri (Kunze) Windham | ARFE5 |
| Fendler's lipfern | Cheilanthes fendleri Hook. | CHFE2 |
| foreign cloak fern | Notholaena aliena Maxon | NOAL |
| fourleaf maidenhair | Adiantum tetraphyllum Humb. & Bonpl. ex Willd. | ADTE2 |
| fragile maidenhair | Adiantum fragile Sw. | ADFR |
| fragile maidenhair | Adiantum fragile Sw. var. fragile | ADFRF |
| fragile maidenhair | Adiantum fragile Sw. var. rigidulum (Mett. ex Kuhn) Proctor | ADFRR |
| fragile rockbrake | Cryptogramma stelleri (Gmel.) Prantl | CRST2 |
| fragrant maidenhair | Adiantum melanoleucum Willd. | ADME |
| fuzzy maidenhair | Adiantum tricholepis F | ADTR |
| Gastony's cliffbrake | Pellaea gastonyi Windham | PEGA5 |
| giant brake | Pteris tripartita Sw. | PTTR2 |
| glossy maidenhair | Adiantum pulverulentum L. | ADPU |
| goldback fern | Pentagramma triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber | PETR7 |
| goldback fern | Pentagramma triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber ssp. semipallida (J.T. Howell) Yatskievych, Windham & Wollenweber | PETRS |
| goldback fern | Pentagramma triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber ssp. triangularis | PETRT |
| goldback fern | Pentagramma Yatskievych, Windham & Wollenweber | PENTA10 |
| goldback fern | Pityrogramma Link | PITYR |
| golden leatherfern | Acrostichum aureum L. | ACAU3 |
| golden lipfern | Cheilanthes bonariensis (Willd.) Proctor | CHBO5 |
| graceful lipfern | Cheilanthes yavapensis Reeves ex Windham | CHYA |
| Gray's cloak fern | Notholaena grayi Davenport | NOGR |
| Gray's cloak fern | Notholaena grayi Davenport ssp. grayi | NOGRG |
| green cliffbrake | Cheilanthes viridis (Forssk.) Sw. | CHVI23 |
| Green Mountain maidenhair | Adiantum viridimontanum Paris | ADVI3 |
| Gregg's cloak fern | Notholaena greggii (Mett. ex Kuhn) Maxon | NOGR2 |
| hairy false cloak fern | Argyrochosma incana (K. Presl) Windham | ARIN11 |
| hairy lipfern | Cheilanthes lanosa (Michx.) D.C. Eat. | CHLA2 |
| heartleaf cliffbrake | Pellaea cordifolia (Sess? & Moc.) A.R. Sm. | PECO11 |
| hemionitis | Hemionitis L. | HEMIO |
| hybrid cloakfern | Astrolepis integerrima (Hook.) Benham & Windham | ASIN19 |
| Indian's dream | Aspidotis densa (Brack.) Lellinger | ASDE6 |
| inland leatherfern | Acrostichum danaeifolium Langsd. & Fisch. | ACDA |
| intermediate cliffbrake | Pellaea intermedia Mett. ex Kuhn | PEIN |
| island goldback fern | Pityrogramma chrysophylla (Sw.) Link | PICH |
| island goldback fern | Pityrogramma chrysophylla (Sw.) Link var. gabrielae Domin | PICHG |
| island goldback fern | Pityrogramma chrysophylla (Sw.) Link var. subflexuosa (Domin) Proctor | PICHS |
| Jamaican goldback fern | Pityrogramma sulphurea (Sw.) Maxon | PISU2 |
| Jones's false cloak fern | Argyrochosma jonesii (Maxon) Windham | ARJO2 |
| Kauai digit fern | Doryopteris angelica K. Wood & W.H. Wagner | DOAN2 |
| Kaulfuss's lipfern | Cheilanthes kaulfussii Kunze | CHKA |
| lace lipfern | Cheilanthes gracillima D.C. Eat. | CHGR |
| lacefern | Aspidotis (Nutt. ex Hook.) Copeland | ASPID2 |
| ladder brake | Pteris vittata L. | PTVI |
| lance fern | Doryopteris decora Brack. | DODE2 |
| largeleaf maidenhair | Adiantum macrophyllum Sw. | ADMA |
| leatherfern | Acrostichum L. | ACROS |
| leatherleaf goldback fern | Pityrogramma austroamericana Domin | PIAU4 |
| Lemmon's cloak fern | Notholaena lemmonii D.C. Eat. | NOLE |
| Lidgate's brake | Pteris lydgatei (Baker) Christ | PTLY |
| lipfern | Cheilanthes Sw. | CHEIL |
| longleaf brake | Pteris longifolia L. | PTLO |
| loulu | Coniogramme pilosa (Brack.) Hieron. | COPI3 |
| Lyngholm's cliffbrake | Pellaea lyngholmii Windham | PELY3 |
| maidenhair fern | Adiantum L. | ADIAN |
| Maxon's cloak fern | Notholaena neglecta Maxon | NONE |
| Maxon's goldback fern | Pentagramma triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber ssp. maxonii (Weatherby) Yatskievych, Windham & Wollenweber | PETRM |
| Mexican scaly cloakfern | Astrolepis sinuata (Lag. ex Sw.) Benham & Windham ssp. mexicana Benham | ASSIM2 |
| Missouri cliffbrake | Pellaea glabella Mett. ex Kuhn ssp. missouriensis (Gastony) Windham | PEGLM |
| Moore's brake | Anopteris hexagona (L.) C. Christens. | ANHE2 |
| Moore's brake | Anopteris hexagona (L.) C. Christens. ssp. intermedia Morton | ANHEI |
| mountain silverback fern | Pityrogramma ebenea (L.) Proctor | PIEB |
| Nealley's cloak fern | Notholaena nealleyi Seaton ex Coult. | NONE4 |
| Newberry's lipfern | Cheilanthes newberryi (D.C. Eat.) Domin | CHNE2 |
| nitbearing lipfern | Cheilanthes lendigera (Cav.) Sw. | CHLE2 |
| northern maidenhair | Adiantum pedatum L. | ADPE |
| Notholaena aliena | Cheilanthes aliena (Maxon) Mickel | CHAL17 |
| Notholaena aschenborniana | Cheilanthes aschenborniana (Klotzsch) Mett. | CHAS4 |
| Notholaena californica ssp. californica | Aleuritopteris cretacea (Liebm.) Fourn. ssp. nigrescens (Ewan) Munz | ALCRN |
| Notholaena californica ssp. californica | Aleuritopteris cretacea auct. non (Liebm.) Fourn. [misapplied] | ALCR15 |
| Notholaena californica ssp. californica | Cheilanthes deserti Mickel | CHDE11 |
| Notholaena californica ssp. californica | Notholaena californica D.C. Eat. ssp. nigrescens Ewan | NOCAN |
| Notholaena californica ssp. californica | Notholaena candida (Mart. & Gal.) Hook. var. accessita Jepson | NOCAA |
| Notholaena copelandii | Cheilanthes candida Mart. & Gal. var. copelandii (C.C. Hall) Mickel | CHCAC4 |
| Notholaena copelandii | Notholaena candida (Mart. & Gal.) Hook. var. copelandii (C.C. Hall) R. Tryon | NOCAC |
| Notholaena grayi ssp. grayi | Cheilanthes grayi (Davenport) Domin | CHGR9 |
| Notholaena greggii | Cheilanthes greggii (Mett. ex Kuhn) Mickel | CHGR11 |
| Notholaena lemmonii | Cheilanthes lemmonii (D.C. Eat.) Domin | CHLE12 |
| Notholaena nealleyi | Cheilanthes nealleyi (Seaton ex Coult.) Domin | CHNE7 |
| Notholaena nealleyi | Notholaena schaffneri (Fourn.) Underwood ex Davenport var. nealleyi (Seaton ex Coult.) Weatherby | NOSCN |
| Notholaena neglecta | Cheilanthes neglecta (Maxon) Mickel | CHNE8 |
| Notholaena schaffneri | Notholaena nealleyi Seaton ex Coult. var. mexicana Davenport [excluded] | NONEM |
| Notholaena schaffneri | Notholaena schaffneri (Fourn.) Underwood ex Davenport var. mexicana (Davenport) Davenport [excluded] | NOSCM |
| Notholaena standleyi | Cheilanthes hookeri (Kummel.) Domin | CHHO8 |
| Notholaena standleyi | Cheilanthes standleyi (Maxon) Mickel | CHST12 |
| Notholaena trichomanoides | Cheilanthes trichomanoides (L.) Mett. | CHTR5 |
| oblique maidenhair | Adiantum obliquum Willd. | ADOB |
| ovateleaf cliffbrake | Pellaea ovata (Desv.) Weatherby | PEOV |
| pale silverback fern | Pentagramma pallida (Weatherby) Yatskievych, Windham & Wollenweber | PEPA40 |
| Parry's lipfern | Cheilanthes parryi (D.C. Eat.) Domin | CHPA4 |
| Pellaea andromedifolia | Pellaea andromedifolia (Kaulfuss) F?e var. pubescens Baker | PEANP |
| Pellaea andromedifolia | Pellaea andromedifolia (Kaulfuss) F?e var. rubens D.C. Eat. | PEANR |
| Pellaea cordifolia | Pellaea cardiomorpha Weatherby | PECA27 |
| Pellaea cordifolia | Pellaea cordata (Cav.) Sm. | PECO20 |
| Pellaea cordifolia | Pellaea sagittata (Cav.) Link var. cordata (Cav.) A. Tryon | PESAC |
| Pellaea glabella ssp. glabella | Pellaea atropurpurea (L.) Link var. bushii Mackenzie | PEATB |
| Pellaea glabella ssp. missouriensis | Pellaea glabella Mett. ex Kuhn var. missouriensis Gastony | PEGLM2 |
| Pellaea glabella ssp. occidentalis | Pellaea glabella Mett. ex Kuhn var. nana (L.C. Rich.) Cody | PEGLN |
| Pellaea glabella ssp. occidentalis | Pellaea glabella Mett. ex Kuhn var. occidentalis (E. Nels.) Butters | PEGLO2 |
| Pellaea glabella ssp. occidentalis | Pellaea occidentalis (E. Nels.) Rydb. | PEOC |
| Pellaea glabella ssp. simplex | Pellaea atropurpurea (L.) Link var. simplex (Butters) Morton | PEATS |
| Pellaea glabella ssp. simplex | Pellaea glabella Mett. ex Kuhn var. simplex Butters | PEGLS2 |
| Pellaea glabella ssp. simplex | Pellaea occidentalis (E. Nels.) Rydb. ssp. simplex (Butters) Gastony | PEOCS |
| Pellaea glabella ssp. simplex | Pellaea suksdorfiana Butters | PESU3 |
| Pellaea mucronata | Pellaea mucronata (D. C. Eaton) D. C. Eaton var. mucronata (D. C. Eaton) D. C. Eaton [superfluous autonym] | PEMUM3 |
| Pellaea mucronata ssp. californica | Pellaea compacta (Davenport) Maxon | PECO22 |
| Pellaea mucronata ssp. californica | Pellaea mucronata (D.C. Eat.) D.C. Eat. var. californica (Lemmon) Munz & Johnston | PEMUC |
| Pellaea mucronata ssp. mucronata | Pellaea longimucronata Hook. | PELO8 |
| Pellaea truncata | Pellaea longimucronata auct. non Hook. [misapplied] | PELO6 |
| Pellaea wrightiana | Pellaea ternifolia (Cav.) Link var. wrightiana (Hook.) A. Tryon | PETEW |
| Pentagramma pallida | Pityrogramma pallida (Weatherby) Alt & V. Grant | PIPA5 |
| Pentagramma pallida | Pityrogramma triangularis (Kaulfuss) Maxon var. pallida Weatherby | PITRP |
| Pentagramma triangularis ssp. maxonii | Pityrogramma triangularis (Kaulfuss) Maxon var. maxonii Weatherby | PITRM |
| Pentagramma triangularis ssp. semipallida | Pityrogramma semipallida J.T. Howell | PISE6 |
| Pentagramma triangularis ssp. semipallida | Pityrogramma triangularis (Kaulfuss) Maxon var. semipallida J.T. Howell | PITRS |
| Pentagramma triangularis ssp. semipallida | Pityrogramma triangularis (Kaulfuss) Maxon var. viridis Hoover | PITRV |
| Pentagramma triangularis ssp. triangularis | Pityrogramma triangularis (Kaulfuss) Maxon | PITR |
| Pentagramma triangularis ssp. viscosa | Pityrogramma triangularis (Kaulfuss) Maxon var. viscosa (D.C. Eat.) Weatherby | PITRV2 |
| Pentagramma triangularis ssp. viscosa | Pityrogramma viscosa (D.C. Eat.) Maxon | PIVI3 |
| Pityrogramma austroamericana | Pityrogramma calomelanos (L.) Link var. aureoflava (Hook.) Weatherby ex Bailey | PICAA |
| Pityrogramma austroamericana | Pityrogramma calomelanos (L.) Link var. austroamericana (Domin) Farw. | PICAA2 |
| Pityrogramma chrysophylla var. subflexuosa | Pityrogramma subflexuosa Domin | PISU4 |
| Pityrogramma ebenea | Pityrogramma tartarea auct. non (Cav.) Maxon [misapplied] | PITA3 |
| Pityrogramma trifoliata | Trismeria trifoliata (L.) Diels | TRTR9 |
| polished maidenhair | Adiantum concinnum Humb. & Bonpl. ex Willd. | ADCO |
| powdery false cloak fern | Argyrochosma dealbata (Pursh) Windham | ARDE5 |
| Pringle's lipfern | Cheilanthes pringlei Davenport | CHPR2 |
| Pteris arborea | Pteris crassipes J.G. Agardh | PTCR |
| Pteris bahamensis | Pteris longifolia L. var. bahamensis (J.G. Agardh) Hieron. | PTLOB |
| Pteris ensiformis | Pteris ensiformis Burm. f. var. victoriae Baker | PTENV |
| Pteris lydgatei | Schizostege lydgatei (Baker) Hbd. | SCLY3 |
| Pteris multifida | Pteris serrulata auct. non L. f. [misapplied] | PTSE3 |
| Pteris plumula | Pteris quadriaurita auct. non Retz. [misapplied] | PTQU |
| Puerto Rico maidenhair | Adiantum vivesii Proctor | ADVI4 |
| purple cliffbrake | Pellaea atropurpurea (L.) Link | PEAT2 |
| pyramid maidenhair | Adiantum pyramidale (L.) Willd. | ADPY |
| rival lipfern | Cheilanthes aemula Maxon | CHAE |
| rockbrake | Cryptogramma R. Br. | CRYPT3 |
| rockslope cloak fern | Notholaena trichomanoides (L.) Desv. | NOTR |
| rough lipfern | Cheilanthes horridula Maxon | CHHO |
| rough maidenhair | Adiantum hispidulum Sw. | ADHI |
| royal lipfern | Cheilanthes notholaenoides (Desv.) Maxon ex Weatherby | CHNO2 |
| scaled cloak fern | Notholaena aschenborniana Klotzsch | NOAS |
| sharp brake | Pteris pungens Willd. | PTPU |
| Sierra cliffbrake | Pellaea brachyptera (T. Moore) Baker | PEBR3 |
| silverback fern | Pentagramma triangularis (Kaulfuss) Yatskievych, Windham & Wollenweber ssp. viscosa (D.C. Eat.) Yatskievych, Windham & Wollenweber | PETRV |
| Sitka rockbrake | Cryptogramma sitchensis (Rupr.) T. Moore | CRSI7 |
| slender brake | Pteris ensiformis Burm. f. | PTEN |
| slender lipfern | Cheilanthes feei T. Moore | CHFE |
| small-leaf false cloak fern | Argyrochosma microphylla (Mett. ex Kuhn) Windham | ARMI6 |
| smooth cliffbrake | Pellaea glabella Mett. ex Kuhn | PEGL |
| smooth cliffbrake | Pellaea glabella Mett. ex Kuhn ssp. glabella | PEGLG |
| smooth cliffbrake | Pellaea glabella Mett. ex Kuhn ssp. simplex (Butters) A.& D. L?ve | PEGLS3 |
| Sonoran cloak fern | Notholaena grayi Davenport ssp. sonorensis Windham | NOGRS |
| southern lipfern | Cheilanthes microphylla (Sw.) Sw. | CHMI4 |
| southwestern false cloak fern | Argyrochosma limitanea (Maxon) Windham | ARLI4 |
| southwestern false cloak fern | Argyrochosma limitanea (Maxon) Windham ssp. limitanea | ARLIL |
| southwestern false cloak fern | Argyrochosma limitanea (Maxon) Windham ssp. mexicana (Maxon) Windham | ARLIM |
| spider brake | Pteris multifida Poir. | PTMU |
| spiny cliffbrake | Pellaea truncata Goodding | PETR3 |
| stalked maidenhair | Adiantum petiolatum Desv. | ADPE3 |
| star cloak fern | Notholaena standleyi Maxon | NOST |
| starfern | Hemionitis palmata L. | HEPA12 |
| streambank lipfern | Cheilanthes paupercula (Kunze) Mett. | CHPA36 |
| striped brake | Pteris plumula Desv. | PTPL |
| tailed maidenhair | Adiantum caudatum L. | ADCA3 |
| Takeuch's lipfern | Doryopteris takeuchii (W.H. Wagner) W.H. Wagner | DOTA2 |
| tall brake | Pteris altissima Poir. | PTAL |
| thickleaf brake | Pteris deflexa Link | PTDE |
| thinleaf brake | Pteris biaurita L. | PTBI |
| threeleaf goldback fern | Pityrogramma trifoliata (L.) R. Tryon | PITR2 |
| toothed brake | Pteris denticulata Sw. | PTDE3 |
| TransPecos cliffbrake | Pellaea ternifolia (Cav.) Link | PETE2 |
| TransPecos cliffbrake | Pellaea ternifolia (Cav.) Link ssp. ternifolia | PETET |
| TransPecos cliffbrake | Pellaea ternifolia (Cav.) Link ssp. villosa Windham | PETEV |
| tree brake | Pteris arborea L. | PTAR |
| triangleleaf lipfern | Doryopteris decipiens (Hook.) J. Sm. | DODE4 |
| tufted lacefern | Aspidotis carlotta-halliae (Wagner & Gilbert) Lellinger | ASCA17 |
| villous lipfern | Cheilanthes villosa Davenport ex Maxon | CHVI |
| viscid lipfern | Cheilanthes viscida Davenport | CHVI2 |
| Waianae Mountain digit fern | Doryopteris subdecipiens W.H. Wagner | DOSU2 |
| waimakanui | Pteris excelsa Gaud. | PTEX |
| wavy scaly cloakfern | Astrolepis sinuata (Lag. ex Sw.) Benham & Windham | ASSI9 |
| wavy scaly cloakfern | Astrolepis sinuata (Lag. ex Sw.) Benham & Windham ssp. sinuata | ASSIS |
| western dwarf cliffbrake | Pellaea glabella Mett. ex Kuhn ssp. occidentalis (E. Nels.) Windham | PEGLO3 |
| whitefoot lipfern | Cheilanthes leucopoda Link | CHLE3 |
| Wilson's maidenhair | Adiantum wilsonii Hook. | ADWI |
| Windham's scaly cloakfern | Astrolepis windhamii Benham | ASWI4 |
| woolly lipfern | Cheilanthes tomentosa Link | CHTO2 |
| woolly maidenhair | Adiantum villosum L. | ADVI |
| Wright's cliffbrake | Pellaea wrightiana Hook. | PEWR |
| Wright's lipfern | Cheilanthes wrightii Hook. | CHWR |
| zigzag brake | Pteris irregularis Kaulfuss | PTIR |