| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PAPR13 | Pannaria praetermissa Nyl. | Fuscopannaria praetermissa | Pannariaceae
|
| PAPU14 | Pannaria pulveracea P. M. Jorg. & Henssen | Fuscopannaria pulveracea | Pannariaceae
|
| PARUL | Pannaria rubiginosa (Ach.) Bory var. lanuginosa (Hoffm.) Zahlbr. | Pannaria conoplea | Pannariaceae
|
| PARU5 | Pannaria rubiginosa (Ach.) Bory | matted lichen | Pannariaceae
|
| PASA4 | Pannaria saubinetii (Mont.) Nyl. | Fuscopannaria saubinetii | Pannariaceae
|
| PASO4 | Pannaria sonomensis Tuck. | Koerberia sonomensis | Placynthiaceae
|
| PATA | Pannaria tavaresii P. M. Jorg. | Tavares' matted lichen | Pannariaceae
|
| PAWA5 | Pannaria waghornei Eckf. | Parmeliella arctophila | Pannariaceae
|
| PANNA2 | Pannaria Delise | matted lichen | Pannariaceae
|
| PAALM | Papaver alaskanum Hult�n var. macranthum Hult�n | Papaver macounii ssp. macounii | Papaveraceae
|
| PAAL20 | Papaver alaskanum Hult�n | Papaver radicatum ssp. alaskanum | Papaveraceae
|
| PAAL5 | Papaver alboroseum Hult�n | pale poppy | Papaveraceae
|
| PAAL8 | Papaver alpinum L. | dwarf poppy | Papaveraceae
|
| PAAPM2 | Papaver apulum Ten. var. micranthum auct. non (Boreau) Fedde | Papaver hybridum | Papaveraceae
|
| PAAR3 | Papaver argemone L. | long pricklyhead poppy | Papaveraceae
|
| PABR10 | Papaver bracteatum Lindley | oriental poppy | Papaveraceae
|
| PACA9 | Papaver californicum Gray | western poppy | Papaveraceae
|
| PACR80 | Papaver croceum Ledeb. | ice poppy | Papaveraceae
|
| PADE11 | Papaver denalii Gjaerev. | Papaver mcconnellii | Papaveraceae
|
| PADU | Papaver dubium L. | blindeyes | Papaveraceae
|
| PAFR3 | Papaver freedmanianum D. L�ve | Papaver radicatum ssp. kluanense | Papaveraceae
|
| PAGL4 | Papaver glaucum Boiss. & Hausskn. | tulip poppy | Papaveraceae
|
| PAGO4 | Papaver gorodkovii Tolm. & Petrovsky | arctic poppy | Papaveraceae
|
| PAHUS | Papaver hultenii Knaben var. salmonicolor Hult�n | Papaver lapponicum | Papaveraceae
|
| PAHU3 | Papaver hultenii Knaben | Papaver lapponicum | Papaveraceae
|
| PAHY3 | Papaver hybridum L. | round pricklyhead poppy | Papaveraceae
|
| PAKE | Papaver keelei Porsild | Papaver macounii ssp. discolor | Papaveraceae
|
| PAKL | Papaver kluanense D. L�ve | Papaver radicatum ssp. kluanense | Papaveraceae
|
| PALAO | Papaver lapponicum (Tolm.) Nordh. ssp. occidentale (Lundstr.) Knaben | Papaver radicatum ssp. radicatum | Papaveraceae
|
| PALAP2 | Papaver lapponicum (Tolm.) Nordh. ssp. porsildii Knaben | Papaver radicatum ssp. radicatum | Papaveraceae
|
| PALA9 | Papaver lapponicum (Tolm.) Nordh. | Lapland poppy | Papaveraceae
|
| PALE9 | Papaver lemmonii Greene | Papaver californicum | Papaveraceae
|
| PAMAD2 | Papaver macounii Greene ssp. discolor (Hult�n) R�ndel ex D.F. Murray | Macoun's poppy | Papaveraceae
|
| PAMAM | Papaver macounii Greene ssp. macounii | Macoun's poppy | Papaveraceae
|
| PAMAD | Papaver macounii Greene var. discolor Hult�n | Papaver macounii ssp. discolor | Papaveraceae
|
| PAMA5 | Papaver macounii Greene | Macoun's poppy | Papaveraceae
|
| PAMC | Papaver mcconnellii Hult�n | McConnell's poppy | Papaveraceae
|
| PAMI10 | Papaver microcarpum auct. non DC. | Papaver macounii ssp. discolor | Papaveraceae
|
| PANI5 | Papaver nigroflavum D. L�ve | Papaver radicatum ssp. radicatum | Papaveraceae
|
| PANUA | Papaver nudicaule L. ssp. americanum R�ndel ex D.F. Murray | Icelandic poppy | Papaveraceae
|
| PANUC | Papaver nudicaule L. var. coloradense Fedde | Papaver radicatum ssp. kluanense | Papaveraceae
|
| PANUC2 | Papaver nudicaule L. var. columbianum Fedde | Papaver radicatum ssp. kluanense | Papaveraceae
|
| PANUP | Papaver nudicaule L. var. pseudocorylatifolium Fedde | Papaver alpinum | Papaveraceae
|
| PANUR | Papaver nudicaule L. var. radicatum (Rottb.) DC. | Papaver radicatum ssp. radicatum | Papaveraceae
|
| PANU3 | Papaver nudicaule L. | Icelandic poppy | Papaveraceae
|
| PAOR5 | Papaver orientale L. | oriental poppy | Papaveraceae
|
| PAPS10 | Papaver pseudo-orientale (Fedde) Medw. | oriental poppy | Papaveraceae
|
| PAPS6 | Papaver pseudoorientale (Fedde) Medv. | Papaver orientale | Papaveraceae
|
| PAPY | Papaver pygmaeum Rydb. | alpine poppy | Papaveraceae
|
| PARAA | Papaver radicatum Rottb. ssp. alaskanum (Hult�n) J.P. Anders. | rooted poppy | Papaveraceae
|
| PARAK | Papaver radicatum Rottb. ssp. kluanense (D. L�ve) D.F. Murray | rooted poppy | Papaveraceae
|
| PARAL | Papaver radicatum Rottb. ssp. lapponicum Tolm. | Papaver lapponicum | Papaveraceae
|
| PARAO | Papaver radicatum Rottb. ssp. occidentale Lundstr. | Papaver radicatum ssp. radicatum | Papaveraceae
|
| PARAP3 | Papaver radicatum Rottb. ssp. porsildii (Knaben) A. L�ve | Papaver radicatum ssp. radicatum | Papaveraceae
|
| PARAR | Papaver radicatum Rottb. ssp. radicatum | rooted poppy | Papaveraceae
|
| PARAP2 | Papaver radicatum Rottb. var. pygmaeum (Rydb.) Welsh | Papaver pygmaeum | Papaveraceae
|
| PARA11 | Papaver radicatum Rottb. | rooted poppy | Papaveraceae
|
| PARH2 | Papaver rhoeas L. | corn poppy | Papaveraceae
|
| PASC11 | Papaver scammanianum D. L�ve | Papaver macounii ssp. discolor | Papaveraceae
|
| PASOS | Papaver somniferum L. var. setigerum auct. non (DC.) Corb. | Papaver somniferum | Papaveraceae
|
| PASO2 | Papaver somniferum L. | opium poppy | Papaveraceae
|
| PAST11 | Papaver �strigosum (Boenn.) Schur (pro sp.) | | Papaveraceae
|
| PAWAS | Papaver walpolei Porsild var. sulphureomaculatum Hult�n | Papaver walpolei | Papaveraceae
|
| PAWA | Papaver walpolei Porsild | Walpole's poppy | Papaveraceae
|
| PAPAV | Papaver L. | poppy | Papaveraceae
|
| PACA27 | Papaya carica Gaertner | Carica papaya | Caricaceae
|
| PAPHI | Paphiopedilum Pfitzer | Venus' slipper | Orchidaceae
|
| PANID2 | Papillaria nigrescens (Hedw.) Jaeg. var. donnellii Aust. | Papillaria nigrescens | Meteoriaceae
|
| PANI7 | Papillaria nigrescens (Hedw.) Jaeg. | black papillaria moss | Meteoriaceae
|
| PAPIL | Papillaria (C. M�ll.) C. M�ll. in �ngstr. | papillaria moss | Meteoriaceae
|
| PAAL11 | Pappophorum alopecuroideum Vahl | Pappophorum pappiferum | Poaceae
|
| PAAP2 | Pappophorum apertum Munro ex Scribn. | Pappophorum vaginatum | Poaceae
|
| PABI2 | Pappophorum bicolor Fourn. | pink pappusgrass | Poaceae
|
| PAMU3 | Pappophorum mucronulatum auct. non Nees | Pappophorum vaginatum | Poaceae
|
| PAPA7 | Pappophorum pappiferum (Lam.) Kuntze | limestone pappusgrass | Poaceae
|
| PASU7 | Pappophorum suffulbosum Arech. | Pappophorum vaginatum | Poaceae
|
| PAVA2 | Pappophorum vaginatum Buckl. | whiplash pappusgrass | Poaceae
|
| PAWR4 | Pappophorum wrightii S. Wats. | Enneapogon desvauxii | Poaceae
|
| PAPPO | Pappophorum Schreb. | pappusgrass | Poaceae
|
| PAPA32 | Papyrius papyriferus (L.) Kuntze | Broussonetia papyrifera | Moraceae
|
| PALO20 | Parakmeria lotungensis (Chun & C.H. Tsoong) Y.W. Law | eastern joy lotustree | Magnoliaceae
|
| PARAK2 | Parakmeria Hu & Cheng | parakmeria | Magnoliaceae
|
| PAPO6 | Paralabatia portoricensis Britt. & Wilson | Pouteria dictyoneura ssp. fuertesii | Sapotaceae
|
| PARE18 | Paraleptodontium recurvifolium (Tayl.) Long | recurved leaf paraleptodontium moss | Pottiaceae
|
| PARAL3 | Paraleptodontium Long | paraleptodontium moss | Pottiaceae
|
| PAEN8 | Paraleucobryum enerve (Thed. in Hartm.) Loeske | paraleucobryum moss | Dicranaceae
|
| PALOS2 | Paraleucobryum longifolium (Hedw.) Loeske ssp. serratum (Kindb.) Podp. | Paraleucobryum longifolium | Dicranaceae
|
| PALOS3 | Paraleucobryum longifolium (Hedw.) Loeske var. subalpinum (Milde) Cas.-Gil | Paraleucobryum longifolium | Dicranaceae
|
| PALO15 | Paraleucobryum longifolium (Hedw.) Loeske | longleaf paraleucobryum moss | Dicranaceae
|
| PASA9 | Paraleucobryum sauteri (Bruch & Schimp. in B.S.G.) Loeske | Paraleucobryum enerve | Dicranaceae
|
| PARAL2 | Paraleucobryum (Lindb.) Loeske | paraleucobryum moss | Dicranaceae
|
| PAAL21 | Paraparmelia alabamensis (Hale & McCull.) Elix & J. Johnston | | Parmeliaceae
|
| PARAP4 | Paraparmelia Elix & J. Johnston | paraparmelia | Parmeliaceae
|
| PAIN | Parapholis incurva (L.) C.E. Hubbard | curved sicklegrass | Poaceae
|
| PAST20 | Parapholis strigosa (Dumort.) C.E. Hubbard | strigose sicklegrass | Poaceae
|
| PARAP | Parapholis C.E. Hubbard | sicklegrass | Poaceae
|
| PAAU14 | Parasenecio auriculata (A. DC.) J.R. Grant | eared Indian plantain | Asteraceae
|
| PARAS2 | Parasenecio W.W. Sm. & Small | Indian plantain | Asteraceae
|
| PAFA8 | Paraserianthes falcataria (L.) I. Nielsen | Falcataria moluccana | Fabaceae
|
| PALOM | Paraserianthes lophantha (Willd.) I. C. Nielsen ssp. montana (Jungh.) I. C. Nielsen | plume albizia | Fabaceae
|
| PALO8 | Paraserianthes lophantha (Willd.) I. Nielsen | plume albizia | Fabaceae
|