| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PTNO2 | Pteretis nodulosa (Michx.) Nieuwl. | Matteuccia struthiopteris | Dryopteridaceae
|
| PTPE2 | Pteretis pensylvanica (Willd.) Fern. | Matteuccia struthiopteris | Dryopteridaceae
|
| PTAQC3 | Pteridium aquilinum (L.) Kuhn ssp. caudatum (L.) Bonap. | Pteridium caudatum | Dennstaedtiaceae
|
| PTAQL2 | Pteridium aquilinum (L.) Kuhn ssp. lanuginosum (Bong.) Hult�n | Pteridium aquilinum var. pubescens | Dennstaedtiaceae
|
| PTAQA | Pteridium aquilinum (L.) Kuhn var. arachnoideum (Kaulfuss) Brade | Pteridium arachnoideum | Dennstaedtiaceae
|
| PTAQC | Pteridium aquilinum (L.) Kuhn var. caudatum (L.) Sadebeck | Pteridium caudatum | Dennstaedtiaceae
|
| PTAQD | Pteridium aquilinum (L.) Kuhn var. decompositum (Gaud.) R. Tryon | decomposition brackenfern | Dennstaedtiaceae
|
| PTAQL3 | Pteridium aquilinum (L.) Kuhn var. lanuginosum (Bong.) Fern. | Pteridium aquilinum var. pubescens | Dennstaedtiaceae
|
| PTAQL | Pteridium aquilinum (L.) Kuhn var. latiusculum (Desv.) Underwood ex Heller | western brackenfern | Dennstaedtiaceae
|
| PTAQP | Pteridium aquilinum (L.) Kuhn var. pseudocaudatum (Clute) Heller | western brackenfern | Dennstaedtiaceae
|
| PTAQP2 | Pteridium aquilinum (L.) Kuhn var. pubescens Underwood | hairy brackenfern | Dennstaedtiaceae
|
| PTAQ | Pteridium aquilinum (L.) Kuhn | western brackenfern | Dennstaedtiaceae
|
| PTAR2 | Pteridium arachnoideum (Kaulfuss) Maxon | tropical brackenfern | Dennstaedtiaceae
|
| PTCA3 | Pteridium caudatum (L.) Maxon | southern brackenfern | Dennstaedtiaceae
|
| PTLAP | Pteridium latiusculum (Desv.) Hieron. var. pseudocaudatum (Clute) Maxon | Pteridium aquilinum var. pseudocaudatum | Dennstaedtiaceae
|
| PTLA | Pteridium latiusculum (Desv.) Hieron. | Pteridium aquilinum var. latiusculum | Dennstaedtiaceae
|
| PTERI | Pteridium Gleditsch ex Scop. | brackenfern | Dennstaedtiaceae
|
| PTFID | Pterigynandrum filiforme Hedw. ssp. decipiens (Web. & Mohr) Kindb. | Pterigynandrum filiforme | Pterigynandraceae
|
| PTFID2 | Pterigynandrum filiforme Hedw. var. decipiens (Web. & Mohr) Limpr. | Pterigynandrum filiforme | Pterigynandraceae
|
| PTFIM | Pterigynandrum filiforme Hedw. var. majus (De Not.) De Not. | Pterigynandrum filiforme | Pterigynandraceae
|
| PTFIM2 | Pterigynandrum filiforme Hedw. var. minus Lesq. & James | Pterigynandrum filiforme | Pterigynandraceae
|
| PTFIP | Pterigynandrum filiforme Hedw. var. papillosulum (C. M�ll. & Kindb. in Mac. & Kindb.) Th�r. | Pterigynandrum filiforme | Pterigynandraceae
|
| PTFI | Pterigynandrum filiforme Hedw. | pterigynandrum moss | Pterigynandraceae
|
| PTSH | Pterigynandrum sharpii Crum & Anderson | Leptohymenium sharpii | Hylocomiaceae
|
| PTERI3 | Pterigynandrum Hedw. | pterigynandrum moss | Pterigynandraceae
|
| PTAL | Pteris altissima Poir. | tall brake | Pteridaceae
|
| PTAR | Pteris arborea L. | tree brake | Pteridaceae
|
| PTBA | Pteris bahamensis (J.G. Agardh) F�e | Bahama brake | Pteridaceae
|
| PTBI | Pteris biaurita L. | thinleaf brake | Pteridaceae
|
| PTCR | Pteris crassipes J.G. Agardh | Pteris arborea | Pteridaceae
|
| PTCRA | Pteris cretica L. var. albolineata Hook. | Cretan brake | Pteridaceae
|
| PTCRC | Pteris cretica L. var. cretica | Cretan brake | Pteridaceae
|
| PTCR2 | Pteris cretica L. | Cretan brake | Pteridaceae
|
| PTDE | Pteris deflexa Link | thickleaf brake | Pteridaceae
|
| PTDE2 | Pteris �delchampsii W.H. Wagner & C.E. Nauman | | Pteridaceae
|
| PTDE3 | Pteris denticulata Sw. | toothed brake | Pteridaceae
|
| PTENV | Pteris ensiformis Burm. f. var. victoriae Baker | Pteris ensiformis | Pteridaceae
|
| PTEN | Pteris ensiformis Burm. f. | slender brake | Pteridaceae
|
| PTEX | Pteris excelsa Gaud. | waimakanui | Pteridaceae
|
| PTGR | Pteris grandifolia L. | elephantleaf brake | Pteridaceae
|
| PTHI | Pteris �hillebrandii Copeland | | Pteridaceae
|
| PTIR | Pteris irregularis Kaulfuss | zigzag brake | Pteridaceae
|
| PTLOB | Pteris longifolia L. var. bahamensis (J.G. Agardh) Hieron. | Pteris bahamensis | Pteridaceae
|
| PTLO | Pteris longifolia L. | longleaf brake | Pteridaceae
|
| PTLY | Pteris lydgatei (Baker) Christ | Lidgate's brake | Pteridaceae
|
| PTMU | Pteris multifida Poir. | spider brake | Pteridaceae
|
| PTMU2 | Pteris mutilata L. | Asian brake | Pteridaceae
|
| PTPL | Pteris plumula Desv. | striped brake | Pteridaceae
|
| PTPU | Pteris pungens Willd. | sharp brake | Pteridaceae
|
| PTQU | Pteris quadriaurita auct. non Retz. | Pteris plumula | Pteridaceae
|
| PTSE3 | Pteris serrulata auct. non L. f. | Pteris multifida | Pteridaceae
|
| PTTR3 | Pteris tremula R.Br. | Australian brake | Pteridaceae
|
| PTTR2 | Pteris tripartita Sw. | giant brake | Pteridaceae
|
| PTVI | Pteris vittata L. | ladder brake | Pteridaceae
|
| PTERI2 | Pteris L. | brake fern | Pteridaceae
|
| PTER | Pterocarpus erinaceus Poiret | barwood | Fabaceae
|
| PTIN2 | Pterocarpus indicus Willd. | pterocarpus | Fabaceae
|
| PTMA3 | Pterocarpus marsupium Roxb. | Malabar kino | Fabaceae
|
| PTOF | Pterocarpus officinalis Jacq. | dragonsblood tree | Fabaceae
|
| PTOS | Pterocarpus osun Craib | pterocarpus | Fabaceae
|
| PTSA | Pterocarpus santalinus L. f. | red sandalwood | Fabaceae
|
| PTSO | Pterocarpus soyauxii Taubert | barwood | Fabaceae
|
| PTERO | Pterocarpus Jacq. | pterocarpus | Fabaceae
|
| PTST80 | Pterocarya stenoptera C. DC. | Chinese wingnut | Juglandaceae
|
| PTERO6 | Pterocarya Kunth | pterocarya | Juglandaceae
|
| PTAL2 | Pterocaulon alopecuroideum (Lam.) DC. | Pterocaulon virgatum | Asteraceae
|
| PTPY2 | Pterocaulon pycnostachyum (Michx.) Ell. | Pterocaulon virgatum | Asteraceae
|
| PTUN | Pterocaulon undulatum (Walt.) C. Mohr | Pterocaulon virgatum | Asteraceae
|
| PTVI2 | Pterocaulon virgatum (L.) DC. | wand blackroot | Asteraceae
|
| PTERO2 | Pterocaulon Ell. | blackroot | Asteraceae
|
| PTEC2 | Pteroglossaspis ecristata (Fern.) Rolfe | giant orchid | Orchidaceae
|
| PTERO7 | Pteroglossaspis Rehb. f. | pteroglossaspis | Orchidaceae
|
| PTGR3 | Pterogonium gracile (Hedw.) Sm. | pterogonium moss | Leucodontaceae
|
| PTPE3 | Pterogonium peregrinum Schimp. | Isothecium cristatum | Brachytheciaceae
|
| PTERO8 | Pterogonium Sm. | pterogonium moss | Leucodontaceae
|
| PTAL3 | Pterogonum alatum (Torr.) Gross. | Eriogonum alatum var. alatum | Polygonaceae
|
| PTGL | Pterolepis glomerata (Rottb.) Miq. | false meadowbeauty | Melastomataceae
|
| PTERO5 | Pterolepis (DC.) Miq. | meadowbeauty | Melastomataceae
|
| PTPO2 | Pteronia porophylla Cav. | Adenophyllum porophyllum | Asteraceae
|
| PTAR3 | Pterophyton aristatum (Ell.) Alexander | Verbesina aristata | Asteraceae
|
| PTHE2 | Pterophyton helianthoides (Michx.) Alexander | Verbesina helianthoides | Asteraceae
|
| PTHE3 | Pterophyton heterophyllum (Chapman) Alexander | Verbesina heterophylla | Asteraceae
|
| PTPA2 | Pterophyton pauciflorum (Nutt.) Alexander | Verbesina heterophylla | Asteraceae
|
| PTAN2 | Pterospora andromedea Nutt. | woodland pinedrops | Monotropaceae
|
| PTERO3 | Pterospora Nutt. | pinedrops | Monotropaceae
|
| PTDR | Pterostegia drymarioides Fisch. & C.A. Mey. | woodland pterostegia | Polygonaceae
|
| PTERO4 | Pterostegia Fisch. & C.A. Mey. | pterostegia | Polygonaceae
|
| PTAT | Pterygiopsis atra Vainio | | Lichinaceae
|
| PTERY3 | Pterygiopsis Vainio | pterygiopsis | Lichinaceae
|
| PTAR4 | Pterygoneurum arcticum Steere | Pterygoneurum lamellatum | Pottiaceae
|
| PTCA4 | Pterygoneurum californicum Crum | California pterygoneurum moss | Pottiaceae
|
| PTKO | Pterygoneurum kozlovii Laz. | Kozlov's pterygoneurum moss | Pottiaceae
|
| PTLA2 | Pterygoneurum lamellatum (Lindb.) Jur. | lamella pterygoneurum moss | Pottiaceae
|
| PTOV | Pterygoneurum ovatum (Hedw.) Dix. | ovate pterygoneurum moss | Pottiaceae
|
| PTSM | Pterygoneurum smardaeanum Vanek | Pterygoneurum kozlovii | Pottiaceae
|
| PTSUH | Pterygoneurum subsessile (Brid.) Jur. var. henricii (Rau) Wareh. in Grout | Pterygoneurum subsessile | Pottiaceae
|
| PTSUK | Pterygoneurum subsessile (Brid.) Jur. var. kieneri Hab. | Pterygoneurum subsessile | Pottiaceae
|
| PTSU | Pterygoneurum subsessile (Brid.) Jur. | sessile pterygoneurum moss | Pottiaceae
|
| PTERY2 | Pterygoneurum Jur. | pterygoneurum moss | Pottiaceae
|
| PTAN4 | Pteryxia anisata (Gray) Mathias & Constance | Aletes anisatus | Apiaceae
|
| PTDA | Pteryxia davidsonii (Coult. & Rose) Mathias & Constance | Davidson's wavewing | Apiaceae
|