| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PECI12 | Peltigera cinnamomea Goward | felt lichen | Peltigeraceae
|
| PECO60 | Peltigera collina (Ach.) Schrader | felt lichen | Peltigeraceae
|
| PEDE23 | Peltigera degenii Gyelnik | Degen's felt lichen | Peltigeraceae
|
| PEDIE | Peltigera didactyla (With.) J. R. Laundon var. extenuata (Nyl. ex Vainio) Goffinet & Hastings | felt lichen | Peltigeraceae
|
| PEDI60 | Peltigera didactyla (With.) J. R. Laundon | felt lichen | Peltigeraceae
|
| PEEL8 | Peltigera elisabethae Gyelnik | Elizabeth's felt lichen | Peltigeraceae
|
| PEER4 | Peltigera erumpens (Taylor) Elenkin | Peltigera didactyla | Peltigeraceae
|
| PEEV | Peltigera evansiana Gyelnik | Evans' felt lichen | Peltigeraceae
|
| PEHA20 | Peltigera hazslinszkyi Gyelnik | Peltigera didactyla var. extenuata | Peltigeraceae
|
| PEHO60 | Peltigera horizontalis (Hudson) Baumg. | horizontal felt lichen | Peltigeraceae
|
| PEHY12 | Peltigera hymenina (Ach.) Delise | felt lichen | Peltigeraceae
|
| PEKR2 | Peltigera kristinssonii Vitik. | Kristinsson's felt lichen | Peltigeraceae
|
| PELA23 | Peltigera lactucifolia (With.) J. R. Laundon | Peltigera hymenina | Peltigeraceae
|
| PELE60 | Peltigera lepidophora (Vainio) Bitter | felt lichen | Peltigeraceae
|
| PELE61 | Peltigera leucophlebia (Nyl.) Gyelnik | felt lichen | Peltigeraceae
|
| PEMA60 | Peltigera malacea (Ach.) Funck | felt lichen | Peltigeraceae
|
| PEME60 | Peltigera membranacea (Ach.) Nyl. | membraneous felt lichen | Peltigeraceae
|
| PENE11 | Peltigera neckeri Hepp ex Mull. Arg. | Necker's felt lichen | Peltigeraceae
|
| PENE12 | Peltigera neopolydactyla (Gyelnik) Gyelnik | felt lichen | Peltigeraceae
|
| PEOC6 | Peltigera occidentalis (E. Dahl) Kristinsson | Peltigera neopolydactyla | Peltigeraceae
|
| PEOC5 | Peltigera occidentalis sensu Kristinsson | Peltigera kristinssonii | Peltigeraceae
|
| PEPA48 | Peltigera pacifica Vitik. | Pacific felt lichen | Peltigeraceae
|
| PEPOH | Peltigera polydactyla (Necker) Hoffm. var. hymenia (Ach.) Flotow | Peltigera hymenina | Peltigeraceae
|
| PEPON | Peltigera polydactyla (Necker) Hoffm. var. neopolydactyla Gyelnik | Peltigera neopolydactyla | Peltigeraceae
|
| PEPO60 | Peltigera polydactylon (Necker) Hoffm. | felt lichen | Peltigeraceae
|
| PEPO9 | Peltigera ponojensis Gyelnik | felt lichen | Peltigeraceae
|
| PEPR60 | Peltigera praetextata (Florke ex Sommerf.) Zopf | felt lichen | Peltigeraceae
|
| PEPU22 | Peltigera pulverulenta (Taylor) Krempelh. | Peltigera scabrosa | Peltigeraceae
|
| PERE11 | Peltigera retifoveata Vitik. | felt lichen | Peltigeraceae
|
| PERU60 | Peltigera rufescens (Weiss) Humb. | felt lichen | Peltigeraceae
|
| PESC60 | Peltigera scabrosa Th. Fr. | felt lichen | Peltigeraceae
|
| PESC13 | Peltigera scarbosella Holt.-Hartw. | felt lichen | Peltigeraceae
|
| PESC10 | Peltigera scutata (Dickson) Duby | Peltigera collina | Peltigeraceae
|
| PESP8 | Peltigera spuria (Ach.) DC. | Peltigera didactyla | Peltigeraceae
|
| PEVA5 | Peltigera variolosa (A. Massal.) Gyelnik | Peltigera leucophlebia | Peltigeraceae
|
| PEVE60 | Peltigera venosa (L.) Hoffm. | felt lichen | Peltigeraceae
|
| PELTI2 | Peltigera Willd. | felt lichen | Peltigeraceae
|
| PEPE2 | Peltiphyllum peltatum (Torr. ex Benth.) Engl. | Darmera peltata | Saxifragaceae
|
| PEGR24 | Peltolepis grandis (Lindb.) Lindb. | | Monosoleniaceae
|
| PELTO2 | Peltolepis Lindb. | | Monosoleniaceae
|
| PEDU3 | Peltophorum dubia (Spreng.) Taubert | horsebush | Fabaceae
|
| PEIN13 | Peltophorum inerme (Roxb.) Llanos ex Fernandez-Vill. | Peltophorum pterocarpum | Fabaceae
|
| PEIN10 | Peltophorum inermis (Roxb.) Naves ex Vill. | Peltophorum pterocarpa | Fabaceae
|
| PEPT | Peltophorum pterocarpa (DC.) Backer ex K. Heyne | yellow poinciana | Fabaceae
|
| PEPT3 | Peltophorum pterocarpum (DC.) Backer ex K. Heyne | peltophorum | Fabaceae
|
| PELTO | Peltophorum (T. Vogel) Benth. | peltophorum | Fabaceae
|
| PEBO3 | Peltula bolanderi (Tuck.) Wetmore | Bolander's peltula lichen | Peltulaceae
|
| PECL3 | Peltula clavata (Krempelh.) Wetmore | peltula lichen | Peltulaceae
|
| PECY8 | Peltula cylindrica Wetmore | peltula lichen | Peltulaceae
|
| PEEU3 | Peltula euploca (Ach.) Poelt | peltula lichen | Peltulaceae
|
| PEMI15 | Peltula michoacanensis (de Lesd.) Wetmore | peltula lichen | Peltulaceae
|
| PEOBD | Peltula obscurans (Nyl.) Gyelnik var. deserticola (Zahlbr.) Wetmore | peltula lichen | Peltulaceae
|
| PEOBH | Peltula obscurans (Nyl.) Gyelnik var. hassei (Zahlbr.) Wetmore | Hasse's peltula lichen | Peltulaceae
|
| PEOBO | Peltula obscurans (Nyl.) Gyelnik var. obscurans | peltula lichen | Peltulaceae
|
| PEOB7 | Peltula obscurans (Nyl.) Gyelnik | peltula lichen | Peltulaceae
|
| PEOM | Peltula omphaliza (Nyl.) Wetmore | peltula lichen | Peltulaceae
|
| PEPA53 | Peltula patellata (Bagl.) Swinscow & Krog | felt lichen | Peltulaceae
|
| PEPL7 | Peltula placodizans (Zahlbr.) Wetmore | peltula lichen | Peltulaceae
|
| PEPO10 | Peltula polyspora (Tuck.) Wetmore | Peltula patellata | Peltulaceae
|
| PERA9 | Peltula radicata (Ach.) Nyl. | peltula lichen | Peltulaceae
|
| PERI3 | Peltula richardsii (Herre) Wetmore | Richards' peltula lichen | Peltulaceae
|
| PESO2 | Peltula sonorensis Budel & T. Nash | felt lichen | Peltulaceae
|
| PETO6 | Peltula tortuosa (Nees) Wetmore | peltula lichen | Peltulaceae
|
| PEZA2 | Peltula zahlbruckneri (Hasse) Wetmore | Zahlbruckner's peltula lichen | Peltulaceae
|
| PELTU | Peltula Nyl. | peltula | Peltulaceae
|
| PEAC6 | Pemphis acidula Forst. & Forst. | | Lythraceae
|
| PEMPH | Pemphis J.R. & G. Forst. | | Lythraceae
|
| PEGRG | Peniocereus greggii (Engelm.) Britt. & Rose var. greggii | nightblooming cereus | Cactaceae
|
| PEGRT | Peniocereus greggii (Engelm.) Britt. & Rose var. transmontanus (Engelm.) Backeberg | nightblooming cereus | Cactaceae
|
| PEGR3 | Peniocereus greggii (Engelm.) Britt. & Rose | nightblooming cereus | Cactaceae
|
| PEST11 | Peniocereus striatus (Brandeg.) Buxbaum | gearstem cactus | Cactaceae
|
| PENIO | Peniocereus (Berger) Britt. & Rose | peniocereus | Cactaceae
|
| PELI11 | Peniophyllum linifolium (Nutt.) Pennell | Oenothera linifolia | Onagraceae
|
| PELO3 | Pennellia longifolia (Benth.) Rollins | longleaf mock thelypody | Brassicaceae
|
| PEMI7 | Pennellia micrantha (Gray) Nieuwl. | mountain mock thelypody | Brassicaceae
|
| PENNE | Pennellia Nieuwl. | mock thelypody | Brassicaceae
|
| PEAL | Pennisetum alopecuroides (L.) Spreng. | Chinese fountaingrass | Poaceae
|
| PEAM4 | Pennisetum americanum (L.) Leeke | Pennisetum glaucum | Poaceae
|
| PECIC | Pennisetum ciliare (L.) Link var. ciliare | buffelgrass | Poaceae
|
| PECIS2 | Pennisetum ciliare (L.) Link var. setigerum (Vahl) Leeke | cow sandbur | Poaceae
|
| PECI | Pennisetum ciliare (L.) Link | buffelgrass | Poaceae
|
| PECL2 | Pennisetum clandestinum Hochst. ex Chiov. | kikuyugrass | Poaceae
|
| PECO38 | Pennisetum complanatum (Nees) Hemsl. | Nicaraguan fountaingrass | Poaceae
|
| PEFL18 | Pennisetum flaccidum Griseb. | kikuyugrass | Poaceae
|
| PEGL2 | Pennisetum glaucum (L.) R. Br. | pearl millet | Poaceae
|
| PEIN14 | Pennisetum incomptum Nees. in Stend. | kikuyugrass | Poaceae
|
| PELA5 | Pennisetum latifolium Spreng. | Uruguayan fountaingrass | Poaceae
|
| PEMA80 | Pennisetum macrourum Trin. | African feathergrass | Poaceae
|
| PENE4 | Pennisetum nervosum (Nees) Trin. | bentspike fountaingrass | Poaceae
|
| PEPEU | Pennisetum pedicellatum Trin. ssp. unispiculum Brunken | Kyasuma grass | Poaceae
|
| PEPE24 | Pennisetum pedicellatum Trin. | Kyasuma grass | Poaceae
|
| PEPE31 | Pennisetum petiolare (Hochst.) Chiov. | petioled fountaingrass | Poaceae
|
| PEPOS | Pennisetum polystachyon (L.) J.A. Schultes ssp. setosum (Sw.) Brunken | mission grass | Poaceae
|
| PEPO4 | Pennisetum polystachyon (L.) J.A. Schultes | mission grass | Poaceae
|
| PEPU2 | Pennisetum purpureum Schumacher | elephant grass | Poaceae
|
| PERE14 | Pennisetum respiciens A. Rich. | Setaria adhaerens | Poaceae
|
| PERU4 | Pennisetum ruppelii Steud. | Pennisetum setaceum | Poaceae
|
| PESE3 | Pennisetum setaceum (Forsk.) Chiov. | crimson fountaingrass | Poaceae
|
| PESE4 | Pennisetum setosum (Sw.) L.C. Rich. | Pennisetum polystachyon ssp. setosum | Poaceae
|
| PETY | Pennisetum typhoides auct. non (Burm.) Stapf & C.E. Hubbard | Pennisetum glaucum | Poaceae
|
| PEVI2 | Pennisetum villosum R. Br. ex Fresen. | feathertop | Poaceae
|