| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| POME8 | Poinciana mexicana (Gray) Britt. & Rose | Caesalpinia mexicana | Fabaceae
|
| POPU12 | Poinciana pulcherrima L. | Caesalpinia pulcherrima | Fabaceae
|
| PORE12 | Poinciana regia Bojer ex Hook. | Delonix regia | Fabaceae
|
| POBA12 | Poinsettia barbellata Small | Euphorbia cyathophora | Euphorbiaceae
|
| POCU8 | Poinsettia cuphosperma Engelm. | Euphorbia cuphosperma | Euphorbiaceae
|
| POCYG | Poinsettia cyathophora (Murr.) Klotzsch & Garcke var. graminifolia (Engelm.) Mohlenbrock | Euphorbia cyathophora | Euphorbiaceae
|
| POCY5 | Poinsettia cyathophora (Murr.) Klotzsch & Garcke | Euphorbia cyathophora | Euphorbiaceae
|
| PODEC | Poinsettia dentata (Michx.) Klotzsch & Garcke var. cuphosperma (Engelm.) Mohlenbrock | Euphorbia cuphosperma | Euphorbiaceae
|
| PODE7 | Poinsettia dentata (Michx.) Klotzsch & Garcke | Euphorbia dentata var. dentata | Euphorbiaceae
|
| POGE2 | Poinsettia geniculata (Ortega) Klotzsch & Garcke | Euphorbia heterophylla | Euphorbiaceae
|
| POGR25 | Poinsettia graminifolia (Michx.) Millsp. | Euphorbia cyathophora | Euphorbiaceae
|
| POHA9 | Poinsettia havanensis (Willd. ex Schlecht. & Cham.) Small | Euphorbia cyathophora | Euphorbiaceae
|
| POHE11 | Poinsettia heterophylla (L.) Klotzsch & Garcke | Euphorbia heterophylla | Euphorbiaceae
|
| POPI6 | Poinsettia pinetorum Small | Euphorbia pinetorum | Euphorbiaceae
|
| POPU10 | Poinsettia pulcherrima (Willd. ex Klotzsch) Graham | Euphorbia pulcherrima | Euphorbiaceae
|
| PORA11 | Poinsettia radians (Benth.) Klotzsch & Garcke | Euphorbia radians | Euphorbiaceae
|
| POFL20 | Poitea florida (Vahl) Lavin | wattapama | Fabaceae
|
| POPA34 | Poitea paucifolia (DC.) Lavin | retama | Fabaceae
|
| POPU19 | Poitea punicea (Urban) Lavin | caracol illo | Fabaceae
|
| POITE | Poitea Vent. | wattapama | Fabaceae
|
| PODOD | Polanisia dodecandra (L.) DC. ssp. dodecandra | redwhisker clammyweed | Capparaceae
|
| PODOR | Polanisia dodecandra (L.) DC. ssp. riograndensis Iltis | Rio Grande clammyweed | Capparaceae
|
| PODOT | Polanisia dodecandra (L.) DC. ssp. trachysperma (Torr. & Gray) Iltis | sandyseed clammyweed | Capparaceae
|
| PODOU | Polanisia dodecandra (L.) DC. ssp. uniglandulosa (Cav.) Iltis | Polanisia uniglandulosa | Capparaceae
|
| PODOT2 | Polanisia dodecandra (L.) DC. var. trachysperma (Torr. & Gray) Iltis | Polanisia dodecandra ssp. trachysperma | Capparaceae
|
| PODO3 | Polanisia dodecandra (L.) DC. | redwhisker clammyweed | Capparaceae
|
| POERB | Polanisia erosa (Nutt.) Iltis ssp. breviglandulosa Iltis | large clammyweed | Capparaceae
|
| POERE | Polanisia erosa (Nutt.) Iltis ssp. erosa | large clammyweed | Capparaceae
|
| POER | Polanisia erosa (Nutt.) Iltis | large clammyweed | Capparaceae
|
| POGR17 | Polanisia graveolens Raf. | Polanisia dodecandra ssp. dodecandra | Capparaceae
|
| POJA3 | Polanisia jamesii (Torr. & Gray) Iltis | James' clammyweed | Capparaceae
|
| POTE8 | Polanisia tenuifolia Torr. & Gray | slenderleaf clammyweed | Capparaceae
|
| POTR13 | Polanisia trachysperma Torr. & Gray | Polanisia dodecandra ssp. trachysperma | Capparaceae
|
| POUN3 | Polanisia uniglandulosa (Cav.) DC. | Mexican clammyweed | Capparaceae
|
| POVI19 | Polanisia viscosa (L.) DC. | Cleome viscosa | Capparaceae
|
| POLAN | Polanisia Raf. | clammyweed | Capparaceae
|
| POMI12 | Polemoniella micrantha (Benth.) Heller | Polemonium micranthum | Polemoniaceae
|
| POAC | Polemonium acutiflorum Willd. ex Roemer & J.A. Schultes | tall Jacob's-ladder | Polemoniaceae
|
| POBE6 | Polemonium berryi Eastw. | Polemonium pulcherrimum ssp. pulcherrimum | Polemoniaceae
|
| POBOB2 | Polemonium boreale M.F. Adams ssp. boreale | northern Jacob's-ladder | Polemoniaceae
|
| POBOM | Polemonium boreale M.F. Adams ssp. macranthum (Cham.) Hult�n | northern Jacob's-ladder | Polemoniaceae
|
| POBOR | Polemonium boreale M.F. Adams ssp. richardsonii (Graham) J.P. Anders. | Polemonium boreale ssp. boreale | Polemoniaceae
|
| POBOV | Polemonium boreale M.F. Adams var. villosissimum Hult�n | Polemonium boreale ssp. boreale | Polemoniaceae
|
| POBO2 | Polemonium boreale M.F. Adams | northern Jacob's-ladder | Polemoniaceae
|
| POBRM | Polemonium brandegeei (Gray) Greene ssp. mellitum (Gray) Wherry | Polemonium brandegeei | Polemoniaceae
|
| POBR8 | Polemonium brandegeei (Gray) Greene | Brandegee's Jacob's-ladder | Polemoniaceae
|
| POCAA4 | Polemonium caeruleum L. ssp. amygdalium (Wherry) Munz | Polemonium occidentale ssp. occidentale | Polemoniaceae
|
| POCAO | Polemonium caeruleum L. ssp. occidentale (Greene) J.F. Davids. | Polemonium occidentale ssp. occidentale | Polemoniaceae
|
| POCAV4 | Polemonium caeruleum L. ssp. vanbruntiae (Britt.) J.F. Davids. | Polemonium vanbruntiae | Polemoniaceae
|
| POCAV3 | Polemonium caeruleum L. ssp. villosum (J.H. Rudolph ex Georgi) Brand | Polemonium acutiflorum | Polemoniaceae
|
| POCAP | Polemonium caeruleum L. var. pterospermum Benth. | Polemonium occidentale ssp. occidentale | Polemoniaceae
|
| POCA2 | Polemonium caeruleum L. | charity | Polemoniaceae
|
| POCA3 | Polemonium californicum Eastw. | moving polemonium | Polemoniaceae
|
| POCAL | Polemonium carneum Gray ssp. luteum (Gray) Brand | Polemonium carneum | Polemoniaceae
|
| POCA4 | Polemonium carneum Gray | royal Jacob's-ladder | Polemoniaceae
|
| POCH3 | Polemonium chartaceum Mason | Mason's Jacob's-ladder | Polemoniaceae
|
| POCO21 | Polemonium columbianum Rydb. | Polemonium californicum | Polemoniaceae
|
| POCO26 | Polemonium confertum Gray | Rocky Mountain Jacob's-ladder | Polemoniaceae
|
| POCU7 | Polemonium cuspidatum Sieb. & Zucc. | stiffpoint Jacob's-ladder | Polemoniaceae
|
| PODES2 | Polemonium delicatum Rydb. ssp. scopulinum (Greene) Wherry | Polemonium pulcherrimum ssp. delicatum | Polemoniaceae
|
| PODET | Polemonium delicatum Rydb. ssp. typicum Wherry | Polemonium pulcherrimum ssp. delicatum | Polemoniaceae
|
| PODE4 | Polemonium delicatum Rydb. | Polemonium pulcherrimum ssp. delicatum | Polemoniaceae
|
| POEL3 | Polemonium elegans Greene | elegant Jacob's-ladder | Polemoniaceae
|
| POEX | Polemonium eximium Greene | skypilot | Polemoniaceae
|
| POFA3 | Polemonium fasciculatum Eastw. | Polemonium pulcherrimum ssp. lindleyi | Polemoniaceae
|
| POFI5 | Polemonium filicinum Greene | Polemonium foliosissimum var. flavum | Polemoniaceae
|
| POFL7 | Polemonium flavum Greene | Polemonium foliosissimum var. flavum | Polemoniaceae
|
| POFOA | Polemonium foliosissimum Gray ssp. albiflorum (Eastw.) Brand | Polemonium foliosissimum var. alpinum | Polemoniaceae
|
| POFOD | Polemonium foliosissimum Gray ssp. decurrens (Brand) Wherry | Polemonium foliosissimum var. alpinum | Polemoniaceae
|
| POFOR | Polemonium foliosissimum Gray ssp. robustum (Rydb.) Brand | Polemonium foliosissimum var. foliosissimum | Polemoniaceae
|
| POFOV | Polemonium foliosissimum Gray ssp. verum Wherry | Polemonium foliosissimum var. foliosissimum | Polemoniaceae
|
| POFOA2 | Polemonium foliosissimum Gray var. alpinum Brand | alpine Jacob's-ladder | Polemoniaceae
|
| POFOF2 | Polemonium foliosissimum Gray var. flavum (Greene) Anway | yellow Jacob's-ladder | Polemoniaceae
|
| POFOF3 | Polemonium foliosissimum Gray var. foliosissimum | towering Jacob's-ladder | Polemoniaceae
|
| POFOM3 | Polemonium foliosissimum Gray var. molle (Greene) Anway | towering Jacob's-ladder | Polemoniaceae
|
| POFO | Polemonium foliosissimum Gray | towering Jacob's-ladder | Polemoniaceae
|
| POGR15 | Polemonium grayanum Rydb. | Polemonium confertum | Polemoniaceae
|
| POHA12 | Polemonium haydenii A. Nels. | Polemonium pulcherrimum ssp. pulcherrimum | Polemoniaceae
|
| POHE12 | Polemonium helleri Brand | Polemonium occidentale ssp. occidentale | Polemoniaceae
|
| POHI10 | Polemonium hinckleyi Standl. | Polemonium pauciflorum ssp. hinckleyi | Polemoniaceae
|
| POHU2 | Polemonium humile Lindl. | Polemonium pulcherrimum ssp. lindleyi | Polemoniaceae
|
| POIN13 | Polemonium intermedium (Brand) Rydb. | Polemonium occidentale ssp. occidentale | Polemoniaceae
|
| POLI6 | Polemonium lindleyi Wherry | Polemonium pulcherrimum ssp. lindleyi | Polemoniaceae
|
| POLO14 | Polemonium longii Fern. | Long's Jacob's-ladder | Polemoniaceae
|
| POMA29 | Polemonium macranthum (Cham.) Klok. | Polemonium boreale ssp. macranthum | Polemoniaceae
|
| POMI | Polemonium micranthum Benth. | annual polemonium | Polemoniaceae
|
| PONE14 | Polemonium nevadense Wherry | Nevada Jacob's-ladder | Polemoniaceae
|
| POOCA | Polemonium occidentale Greene ssp. amygdalium Wherry | Polemonium occidentale ssp. occidentale | Polemoniaceae
|
| POOCL | Polemonium occidentale Greene ssp. lacustre Wherry | western polemonium | Polemoniaceae
|
| POOCO | Polemonium occidentale Greene ssp. occidentale | western polemonium | Polemoniaceae
|
| POOCT | Polemonium occidentale Greene ssp. typicum Wherry | Polemonium occidentale ssp. occidentale | Polemoniaceae
|
| POOCL2 | Polemonium occidentale Greene var. lacustre (Wherry) Lakela | Polemonium occidentale ssp. lacustre | Polemoniaceae
|
| POOC2 | Polemonium occidentale Greene | western polemonium | Polemoniaceae
|
| POPAH | Polemonium pauciflorum S. Wats. ssp. hinckleyi (Standl.) Wherry | Hinckley's polemonium | Polemoniaceae
|
| POPAP | Polemonium pauciflorum S. Wats. ssp. pauciflorum | fewflower Jacob's-ladder | Polemoniaceae
|
| POPAT | Polemonium pauciflorum S. Wats. ssp. typicum Wherry | Polemonium pauciflorum ssp. pauciflorum | Polemoniaceae
|
| POPA20 | Polemonium pauciflorum S. Wats. | fewflower Jacob's-ladder | Polemoniaceae
|
| POPE14 | Polemonium pectinatum Greene | Washington Jacob's-ladder | Polemoniaceae
|
| POPI7 | Polemonium pilosum (Greenm.) G.N. Jones | Polemonium pulcherrimum ssp. pulcherrimum | Polemoniaceae
|
| POPUD3 | Polemonium pulcherrimum Hook. ssp. delicatum (Rydb.) Brand | Jacob's-ladder | Polemoniaceae
|
| POPUL3 | Polemonium pulcherrimum Hook. ssp. lindleyi (Wherry) V. Grant | Jacob's-ladder | Polemoniaceae
|