| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PEPUE | Persicaria punctata (Ell.) Small var. eciliata Small | Polygonum punctatum var. punctatum | Polygonaceae
|
| PEPUL | Persicaria punctata (Ell.) Small var. leptostachya (Meisn.) Small | Polygonum punctatum var. confertiflorum | Polygonaceae
|
| PEPU18 | Persicaria punctata (Ell.) Small | Polygonum punctatum var. punctatum | Polygonaceae
|
| PERO7 | Persicaria robustior (Small) Bickn. | Polygonum robustius | Polygonaceae
|
| PERUV | Persicaria ruderalis (Salisb.) C.F. Reed var. vulgaris (Webb & Moq.) C.F. Reed | Polygonum persicaria | Polygonaceae
|
| PERU8 | Persicaria ruderalis (Salisb.) C.F. Reed | Polygonum persicaria | Polygonaceae
|
| PESE17 | Persicaria segeta (Kunth) Small | Polygonum segetum | Polygonaceae
|
| PESEI | Persicaria setacea (Baldw.) Small var. interjecta (Fern.) C.F. Reed | Polygonum setaceum | Polygonaceae
|
| PESET | Persicaria setacea (Baldw.) Small var. tonsa (Fern.) C.F. Reed | Polygonum setaceum | Polygonaceae
|
| PESE15 | Persicaria setacea (Baldw.) Small | Polygonum setaceum | Polygonaceae
|
| PETO5 | Persicaria tomentosa (Schrank) Bickn. | Polygonum lapathifolium | Polygonaceae
|
| PEVI13 | Persicaria virginiana (L.) Gaertn. | Polygonum virginianum | Polygonaceae
|
| PEVU | Persicaria vulgaris Webb & Moq. | Polygonum persicaria | Polygonaceae
|
| PETU4 | Perstusaria tuberculifera Nyl. | Pertusaria paratuberculifera | Pertusariaceae
|
| PEAL20 | Pertusaria alaskensis Erichsen | Alaskan pore lichen | Pertusariaceae
|
| PEAL21 | Pertusaria albescens (Hudson) Choisy & Werner | pore lichen | Pertusariaceae
|
| PEAL23 | Pertusaria aleutensis Erichsen | Pertusaria alaskensis | Pertusariaceae
|
| PEAL22 | Pertusaria alpina Hepp ex Ahles | alpine pore lichen | Pertusariaceae
|
| PEAMF | Pertusaria amara (Ach.) Nyl. var. flotowiana (Florke) Vainio | Pertusaria amara | Pertusariaceae
|
| PEAM9 | Pertusaria amara (Ach.) Nyl. | pore lichen | Pertusariaceae
|
| PEAM10 | Pertusaria ambigens (Nyl.) Tuck. | Pertusaria subambigens | Pertusariaceae
|
| PEAR11 | Pertusaria arizonica Dibben | Arizona pore lichen | Pertusariaceae
|
| PEAT5 | Pertusaria atra Lynge | pore lichen | Pertusariaceae
|
| PEBO4 | Pertusaria borealis Erichsen | northern pore lichen | Pertusariaceae
|
| PEBR22 | Pertusaria bryontha (Ach.) Nyl. | pore lichen | Pertusariaceae
|
| PEBR23 | Pertusaria bryophaga Erichsen | Ochrolechia bryophaga | Pertusariaceae
|
| PECA34 | Pertusaria californica Dibben | California pore lichen | Pertusariaceae
|
| PECA36 | Pertusaria canadensis Stirton | Pertusaria pustulata | Pertusariaceae
|
| PECA35 | Pertusaria carneopallida (Nyl.) Anzi | pore lichen | Pertusariaceae
|
| PECE4 | Pertusaria ceuthocarpa (Sm.) Turner & Borrer | Pertusaria excludens | Pertusariaceae
|
| PECE5 | Pertusaria ceuthocarpoides Zahlbr. | Pertusaria excludens | Pertusariaceae
|
| PECH3 | Pertusaria chiodectonoides Bagl. ex A. Massal. | pore lichen | Pertusariaceae
|
| PECO35 | Pertusaria concentrica Erichsen | Pertusaria multipunctoides | Pertusariaceae
|
| PECO32 | Pertusaria consocians Dibben | pore lichen | Pertusariaceae
|
| PECO33 | Pertusaria copiosa Erichsen | pore lichen | Pertusariaceae
|
| PECOO2 | Pertusaria coriacea (Th. Fr.) Th. Fr. var. obducens (Ny.) Vainio | Pertusaria coriacea | Pertusariaceae
|
| PECO34 | Pertusaria coriacea (Th. Fr.) Th. Fr. | leathery pore lichen | Pertusariaceae
|
| PEDA3 | Pertusaria dactylina (Ach.) Nyl. | pore lichen | Pertusariaceae
|
| PEDI13 | Pertusaria diffusilis Erichsen | Pertusaria glomerata | Pertusariaceae
|
| PEDI14 | Pertusaria discoidea (Pers.) Malme | Pertusaria albescens | Pertusariaceae
|
| PEDI12 | Pertusaria disticha Erichsen | pore lichen | Pertusariaceae
|
| PEEP2 | Pertusaria epixantha R. C. Harris | pore lichen | Pertusariaceae
|
| PEEX5 | Pertusaria excludens Nyl. | pore lichen | Pertusariaceae
|
| PEEX6 | Pertusaria expolita R. C. Harris | pore lichen | Pertusariaceae
|
| PEFI4 | Pertusaria finkii Zahlbr. ex Fink | Pertusaria rhexostoma | Pertusariaceae
|
| PEFL16 | Pertusaria flavicunda Tuck. | pore lichen | Pertusariaceae
|
| PEFL20 | Pertusaria flavocorallina Coppins & Muhr | pore lichen | Pertusariaceae
|
| PEFL17 | Pertusaria floridana Dibben | Florida pore lichen | Pertusariaceae
|
| PEFR8 | Pertusaria freyi Erichsen | Megaspora verrucosa | Hymeneliaceae
|
| PEGE2 | Pertusaria geminipara (Th. Fr.) C. Knight ex Brodo | pore lichen | Pertusariaceae
|
| PEGL18 | Pertusaria glaucomela (Tuck.) Nyl. | pore lichen | Pertusariaceae
|
| PEGL19 | Pertusaria globularis (Ach.) Tuck. | ballhead pore lichen | Pertusariaceae
|
| PEGL20 | Pertusaria glomerata (Ach.) Schaerer | pore lichen | Pertusariaceae
|
| PEGR21 | Pertusaria granulata (Ach.) Mull. Arg. | Pertusaria wulfenioides | Pertusariaceae
|
| PEHA17 | Pertusaria hakkodensis Yasuda ex Rasanen | pore lichen | Pertusariaceae
|
| PEHU7 | Pertusaria hultenii Erichsen | Ochrolechia subplicans ssp. hultenii | Pertusariaceae
|
| PEHY8 | Pertusaria hymenea (Ach.) Schaerer | pore lichen | Pertusariaceae
|
| PEHY9 | Pertusaria hypothamnolica Dibben | pore lichen | Pertusariaceae
|
| PEIN15 | Pertusaria iners R. C. Harris | pore lichen | Pertusariaceae
|
| PELA24 | Pertusaria laevigata (Nyl.) Arnold | Pertusaria trachythallina | Pertusariaceae
|
| PELE15 | Pertusaria lecanina Tuck. | pore lichen | Pertusariaceae
|
| PELE17 | Pertusaria leioplaca DC. | pore lichen | Pertusariaceae
|
| PELE18 | Pertusaria leioterella Erichsen | Pertusaria macounii | Pertusariaceae
|
| PELE16 | Pertusaria leucostoma A. Massal. | Pertusaria leioplaca | Pertusariaceae
|
| PEMA18 | Pertusaria macounii (Lamb) Dibben | Macoun's pore lichen | Pertusariaceae
|
| PEMA19 | Pertusaria marginata Nyl. | Pertusaria propinqua | Pertusariaceae
|
| PEMI17 | Pertusaria microsticta (Sm. & Sow.) Erichsen | Pertusaria excludens | Pertusariaceae
|
| PEMO6 | Pertusaria monogona Nyl. | Pertusaria excludens | Pertusariaceae
|
| PEMU14 | Pertusaria multipunctoides Dibben | pore lichen | Pertusariaceae
|
| PENE13 | Pertusaria neoscotica Lamb | pore lichen | Pertusariaceae
|
| PENO | Pertusaria nolens Nyl. | Pertusaria chiodectonoides | Pertusariaceae
|
| PEOB8 | Pertusaria obruta R. C. Harris | pore lichen | Pertusariaceae
|
| PEOC3 | Pertusaria octomela (Norman) Erichsen | pore lichen | Pertusariaceae
|
| PEOC4 | Pertusaria oculata (Dickson) Th. Fr. | pore lichen | Pertusariaceae
|
| PEOP4 | Pertusaria ophthalmiza (Nyl.) Nyl. | pore lichen | Pertusariaceae
|
| PEOS3 | Pertusaria ostiolata Dibben | pore lichen | Pertusariaceae
|
| PEPA49 | Pertusaria panyrga (Ach.) A. Massal. | pore lichen | Pertusariaceae
|
| PEPA50 | Pertusaria papillata (Ach.) Tuck. | pore lichen | Pertusariaceae
|
| PEPA51 | Pertusaria paratuberculifera Dibben | pore lichen | Pertusariaceae
|
| PEPL8 | Pertusaria plittiana Erichsen | Plitt's pore lichen | Pertusariaceae
|
| PEPR9 | Pertusaria propinqua Mull. Arg. | pore lichen | Pertusariaceae
|
| PEPR11 | Pertusaria protuberans (Sommerf. ex Th. Fr.) Th. Fr. | Pertusaria carneopallida | Pertusariaceae
|
| PEPR10 | Pertusaria pruinifera Erichsen | pore lichen | Pertusariaceae
|
| PEPS5 | Pertusaria pseudocorallina (Lilj.) Arnold | pore lichen | Pertusariaceae
|
| PEPU23 | Pertusaria pulchella Malme | Pertusaria velata | Pertusariaceae
|
| PEPU24 | Pertusaria pupillaris (Nyl.) Th. Fr. | pore lichen | Pertusariaceae
|
| PEPU21 | Pertusaria pustulata (Ach.) Duby | pore lichen | Pertusariaceae
|
| PERH4 | Pertusaria rhexostoma Nyl. | pore lichen | Pertusariaceae
|
| PERH5 | Pertusaria rhodoleuca Th. Fr. | Ochrolechia rhodoleuca | Pertusariaceae
|
| PERU9 | Pertusaria rubefacta Erichsen | pore lichen | Pertusariaceae
|
| PERU10 | Pertusaria rubescens Erichsen | Pertusaria propinqua | Pertusariaceae
|
| PESA15 | Pertusaria santamonicae Dibben | Pertusaria velata | Pertusariaceae
|
| PESA16 | Pertusaria saximontana Wetmore | pore lichen | Pertusariaceae
|
| PESH2 | Pertusaria shenandoensis Hale & Dibben | Shenandoah pore lichen | Pertusariaceae
|
| PESI6 | Pertusaria sinusmexicani Dibben | Mexican pore lichen | Pertusariaceae
|
| PESO | Pertusaria sommerfeltii (Florke ex Sommerf.) Fr. | Sommerfelt's pore lichen | Pertusariaceae
|
| PEST12 | Pertusaria stenhammari Hellb. | Stenhammar's pore lichen | Pertusariaceae
|
| PESU14 | Pertusaria subambigens Dibben | pore lichen | Pertusariaceae
|
| PESU15 | Pertusaria subamplicata Nyl. | pore lichen | Pertusariaceae
|
| PESU16 | Pertusaria subdactylina Nyl. | pore lichen | Pertusariaceae
|
| PESU17 | Pertusaria subobducens Nyl. | pore lichen | Pertusariaceae
|