| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| POSE12 | Polypodium sectifrons Kunze ex Mett. | Zygophlebia sectifrons | Grammitidaceae
|
| POSI5 | Polypodium sibiricum Sipl. | Siberian polypody | Polypodiaceae
|
| POSO | Polypodium sororium Humb. & Bonpl. ex Willd. | Polypodium dulce | Polypodiaceae
|
| POSP2 | Polypodium spectrum Kaulfuss | Microsorum spectrum | Polypodiaceae
|
| POSQ | Polypodium squamatum L. | Pleopeltis squamata | Polypodiaceae
|
| POTA5 | Polypodium taenifolium Jenman | Melpomense flabelliformis | Grammitidaceae
|
| POTA4 | Polypodium tamariscinum Kaulfuss | Adenophorus tamariscinus | Grammitidaceae
|
| POTA6 | Polypodium taxifolium L. | Grammitis taxifolia | Grammitidaceae
|
| POTH6 | Polypodium thunbergianum (Kaulfuss) C. Christens. | Lepisorus thunbergianus | Polypodiaceae
|
| POTHR | Polypodium thyssanolepis A. Braun ex Klotzsch var. riograndense T. Wendt | Pleopeltis riograndensis | Polypodiaceae
|
| POTH | Polypodium thyssanolepis A. Braun ex Klotzsch | Pleopeltis thyssanolepis | Polypodiaceae
|
| POTR14 | Polypodium trichomanoides Sw. | Grammitis trichomanoides | Grammitidaceae
|
| POTR12 | Polypodium trifurcatum L. | Enterosora trifurcata | Grammitidaceae
|
| POTR8 | Polypodium triseriale Sw. | anglevein fern | Polypodiaceae
|
| POVI7 | Polypodium virginianum L. | rock polypody | Polypodiaceae
|
| POVUC3 | Polypodium vulgare L. ssp. columbianum (Gilbert) Hult�n | Polypodium hesperium | Polypodiaceae
|
| POVUO | Polypodium vulgare L. ssp. occidentale (Hook.) Hult�n | Polypodium glycyrrhiza | Polypodiaceae
|
| POVUC2 | Polypodium vulgare L. var. columbianum Gilbert | Polypodium hesperium | Polypodiaceae
|
| POVUC | Polypodium vulgare L. var. commune Milde | Polypodium glycyrrhiza | Polypodiaceae
|
| POVUH | Polypodium vulgare L. var. hesperium (Maxon) A. Nels. & J.F. Macbr. | Polypodium hesperium | Polypodiaceae
|
| POVUI | Polypodium vulgare L. var. intermedium (Hook. & Arn.) Fern. | Polypodium calirhiza | Polypodiaceae
|
| POVUO2 | Polypodium vulgare L. var. occidentale Hook. | Polypodium glycyrrhiza | Polypodiaceae
|
| POVUV2 | Polypodium vulgare L. var. virginianum (L.) Eat. | Polypodium virginianum | Polypodiaceae
|
| POVU3 | Polypodium vulgare auct. p.p. non L. | Polypodium virginianum | Polypodiaceae
|
| POLYP | Polypodium L. | polypody | Polypodiaceae
|
| POAU3 | Polypogon australis Brongn. | Chilean rabbitsfoot grass | Poaceae
|
| POEL | Polypogon elongatus Kunth | streambank rabbitsfoot grass | Poaceae
|
| POFU7 | Polypogon fugax Nees | Asia Minor bluegrass | Poaceae
|
| POIN7 | Polypogon interruptus Kunth | ditch rabbitsfoot grass | Poaceae
|
| POLI5 | Polypogon littoralis Sm. | � Agropogon littoralis | Poaceae
|
| POLU5 | Polypogon lutosus auct. non (Poir.) A.S. Hitchc. | Polypogon interruptus | Poaceae
|
| POMA10 | Polypogon maritimus Willd. | Mediterranean rabbitsfoot grass | Poaceae
|
| POMO5 | Polypogon monspeliensis (L.) Desf. | annual rabbitsfoot grass | Poaceae
|
| POSE11 | Polypogon semiverticillatus (Forsk.) Hyl. | Polypogon viridis | Poaceae
|
| POVI9 | Polypogon viridis (Gouan) Breistr. | beardless rabbitsfoot grass | Poaceae
|
| POLYP2 | Polypogon Desf. | rabbitsfoot grass | Poaceae
|
| POPR4 | Polypremum procumbens L. | juniper leaf | Buddlejaceae
|
| POLYP3 | Polypremum L. | polypremum | Buddlejaceae
|
| POCA18 | Polypteris callosa (Nutt.) Gray | Palafoxia callosa | Asteraceae
|
| POIN18 | Polypteris integrifolia Nutt. | Palafoxia integrifolia | Asteraceae
|
| POSP11 | Polypteris sphacelata (Nutt. ex Torr.) Trel. | Palafoxia sphacelata | Asteraceae
|
| POLI4 | Polyradicion lindenii (Lindl.) Garay | palmpolly | Orchidaceae
|
| POLYR2 | Polyradicion Garay | polyradicion | Orchidaceae
|
| POLI3 | Polyrrhiza lindenii (Lindl.) Cogn. | Polyradicion lindenii | Orchidaceae
|
| POBA7 | Polyscias balfouriana (hort. Sander ex Andr�) Bailey | Polyscias scutellaria | Araliaceae
|
| POCU14 | Polyscias cumingiana (K. Presl) Fernandez-Villar | | Araliaceae
|
| POFR5 | Polyscias fruticosa (L.) H.A.T. Harms | Ming aralia | Araliaceae
|
| POGU | Polyscias guilfoylei (Bull ex Cogn. & E. March.) Bailey | geranium aralia | Araliaceae
|
| POPI13 | Polyscias pinnata J.R. & G. Forst. | Polyscias scutellaria | Araliaceae
|
| PORU15 | Polyscias rumphiana Harms | Polyscias cumingiana | Araliaceae
|
| POSC10 | Polyscias scutellaria (Burm. f.) Fosberg | shield aralia | Araliaceae
|
| POSU20 | Polyscias subcapitata Kanehira | polyscias | Araliaceae
|
| POLYS4 | Polyscias J.R. & G. Forst. | aralia | Araliaceae
|
| POLA18 | Polysporina lapponica (Ach. ex Schaerer) Degel. | | Acarosporaceae
|
| POSI8 | Polysporina simplex (Davies) Vezda | | Acarosporaceae
|
| POUR2 | Polysporina urceolata (Anzi) Brodo | | Acarosporaceae
|
| POLYS5 | Polysporina Vezda | polysporina | Acarosporaceae
|
| POCE2 | Polystachya cerea Lindl. | Polystachya foliosa | Orchidaceae
|
| POCO27 | Polystachya concreta (Jacq.) Garay & Sweet | greater yellowspike orchid | Orchidaceae
|
| POEX3 | Polystachya extinctoria Reichenb. f. | Polystachya concreta | Orchidaceae
|
| POFL6 | Polystachya flavescens (Lindl.) J.J. Sm. | Polystachya concreta | Orchidaceae
|
| POFO4 | Polystachya foliosa (Lindl. ex Hook.) Reichenb. f. | lesser yellowspike orchid | Orchidaceae
|
| POLU3 | Polystachya luteola (Sw.) Hook. | Polystachya concreta | Orchidaceae
|
| POMI16 | Polystachya minor Fawcett & Rendle | Polystachya foliosa | Orchidaceae
|
| POMI9 | Polystachya minuta (Aubl.) Britt. | Polystachya concreta | Orchidaceae
|
| POLYS3 | Polystachya Hook. | yellowspike orchid | Orchidaceae
|
| POCH4 | Polystichopsis chaerophylloides (Poir.) Morton | Arachniodes chaerophylloides | Dryopteridaceae
|
| POACA | Polystichum acrostichoides (Michx.) Schott var. acrostichoides | Christmas fern | Dryopteridaceae
|
| POACL | Polystichum acrostichoides (Michx.) Schott var. lonchitoides Brooks | Christmas fern | Dryopteridaceae
|
| POACS | Polystichum acrostichoides (Michx.) Schott var. schweinitzii (Beck) Small | Polystichum acrostichoides var. acrostichoides | Dryopteridaceae
|
| POAC4 | Polystichum acrostichoides (Michx.) Schott | Christmas fern | Dryopteridaceae
|
| POAD | Polystichum adiantiforme (G. Forst.) J. Sm. | Rumohra adiantiformis | Dryopteridaceae
|
| POAL12 | Polystichum alaskense Maxon | Polystichum setigerum | Dryopteridaceae
|
| POAL6 | Polystichum aleuticum C. Christens. | Aleutian holly fern | Dryopteridaceae
|
| POAN2 | Polystichum andersonii Hopkins | Anderson's hollyfern | Dryopteridaceae
|
| POBO8 | Polystichum bonseyi W. H. Wagner & Hobdy | Bonsey's hollyfern | Dryopteridaceae
|
| POBRA2 | Polystichum braunii (Spenner) F�e ssp. alaskense (Maxon) Calder & Taylor | Polystichum setigerum | Dryopteridaceae
|
| POBRA4 | Polystichum braunii (Spenner) F�e ssp. andersonii (Hopkins) Calder & Taylor | Polystichum andersonii | Dryopteridaceae
|
| POBRP3 | Polystichum braunii (Spenner) F�e ssp. purshii (Fern.) Calder & Taylor | Polystichum braunii | Dryopteridaceae
|
| POBRA3 | Polystichum braunii (Spenner) F�e var. alaskense (Maxon) Hult�n | Polystichum setigerum | Dryopteridaceae
|
| POBRP2 | Polystichum braunii (Spenner) F�e var. purshii Fern. | Polystichum braunii | Dryopteridaceae
|
| POBR4 | Polystichum braunii (Spenner) F�e | Braun's hollyfern | Dryopteridaceae
|
| POCA27 | Polystichum calderonense Proctor | Monte Guilarte hollyfern | Dryopteridaceae
|
| POCA25 | Polystichum californicum (D.C. Eat.) Diels | California swordfern | Dryopteridaceae
|
| PODU2 | Polystichum dudleyi Maxon | Dudley's swordfern | Dryopteridaceae
|
| POEC | Polystichum echinatum (Gmel.) C. Christens. | rusty swordfern | Dryopteridaceae
|
| POFA5 | Polystichum falcatum (L. f.) Diels | Cyrtomium falcatum | Dryopteridaceae
|
| POHA8 | Polystichum �hagenahii Cody | | Dryopteridaceae
|
| POHA | Polystichum haleakalense Brack. | island swordfern | Dryopteridaceae
|
| POHI7 | Polystichum hillebrandii Carruthers | Hillebrand's hollyfern | Dryopteridaceae
|
| POIMC | Polystichum imbricans (D.C. Eat.) D.H. Wagner ssp. curtum (Ewan) D.H. Wagner | narrowleaf swordfern | Dryopteridaceae
|
| POIMI | Polystichum imbricans (D.C. Eat.) D.H. Wagner ssp. imbricans | narrowleaf swordfern | Dryopteridaceae
|
| POIM | Polystichum imbricans (D.C. Eat.) D.H. Wagner | narrowleaf swordfern | Dryopteridaceae
|
| POKR | Polystichum kruckebergii W.H. Wagner | Kruckeberg's hollyfern | Dryopteridaceae
|
| POLE5 | Polystichum lemmonii Underwood | Lemmon's hollyfern | Dryopteridaceae
|
| POLO4 | Polystichum lonchitis (L.) Roth | northern hollyfern | Dryopteridaceae
|
| POMA33 | Polystichum �marginale (W.R. McColl) Cody | Polystichum hagenahii | Dryopteridaceae
|
| POMI5 | Polystichum microchlamys (Christ) Matsumura | attu hollyfern | Dryopteridaceae
|
| POMOL | Polystichum mohrioides (Bory) K. Presl var. lemmonii (Underwood) Fern. | Polystichum lemmonii | Dryopteridaceae
|
| POMOS | Polystichum mohrioides (Bory) K. Presl var. scopulinum (D.C. Eat.) Fern. | Polystichum scopulinum | Dryopteridaceae
|
| POMO9 | Polystichum mohrioides auct. non (Bory) K. Presl | Polystichum lemmonii | Dryopteridaceae
|