| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PIDIH | Pinus divaricata (Ait.) Dum.-Cours. var. hendersonii (Lemmon) Boivin | Pinus contorta var. latifolia | Pinaceae
|
| PIDIL | Pinus divaricata (Ait.) Dum.-Cours. var. latifolia (Engelm. ex S. Wats.) Boivin | Pinus contorta var. latifolia | Pinaceae
|
| PIDI4 | Pinus divaricata (Ait.) Dum.-Cours. | Pinus banksiana | Pinaceae
|
| PIEC2 | Pinus echinata P. Mill. | shortleaf pine | Pinaceae
|
| PIEDF | Pinus edulis Engelm. var. fallax Little | Pinus monophylla var. fallax | Pinaceae
|
| PIED | Pinus edulis Engelm. | twoneedle pinyon | Pinaceae
|
| PIELA | Pinus elliottii Engelm. var. austrokeyensis Silba | Key pine | Pinaceae
|
| PIELD | Pinus elliottii Engelm. var. densa Little & Dorman | Florida slash pine | Pinaceae
|
| PIELE2 | Pinus elliottii Engelm. var. elliottii | Honduras pine | Pinaceae
|
| PIEL | Pinus elliottii Engelm. | slash pine | Pinaceae
|
| PIEN2 | Pinus engelmannii Carr. | Apache pine | Pinaceae
|
| PIFLR2 | Pinus flexilis James var. reflexa Engelm. | Pinus strobiformis | Pinaceae
|
| PIFL2 | Pinus flexilis James | limber pine | Pinaceae
|
| PIFR | Pinus fraseri Pursh | Abies fraseri | Pinaceae
|
| PIGL2 | Pinus glabra Walt. | spruce pine | Pinaceae
|
| PIGR8 | Pinus greggii Engelm. ex Parl. | | Pinaceae
|
| PIHA7 | Pinus halepensis P. Mill. | aleppo pine | Pinaceae
|
| PIHE6 | Pinus heterophylla (Ell.) Sudworth | Pinus elliottii var. elliottii | Pinaceae
|
| PIJE | Pinus jeffreyi Grev. & Balf. | Jeffrey pine | Pinaceae
|
| PIJO | Pinus johannis M.F. Robert | Johannis pine | Pinaceae
|
| PIJU | Pinus juarezensis Lanner | Pinus quadrifolia | Pinaceae
|
| PILA | Pinus lambertiana Dougl. | sugar pine | Pinaceae
|
| PILA5 | Pinus latifolia Sarg. | Pinus engelmannii | Pinaceae
|
| PILEC | Pinus leiophylla Schiede & Deppe var. chihuahuana (Engelm.) Shaw | Chihuahuan pine | Pinaceae
|
| PILE | Pinus leiophylla Schiede & Deppe | Chihuahuan pine | Pinaceae
|
| PILO | Pinus longaeva D.K. Bailey | Great Basin bristlecone pine | Pinaceae
|
| PIMA14 | Pinus maximartinezii Rzed. | maxipi�on | Pinaceae
|
| PIME2 | Pinus merkusii Junghuhn & Vriese ex Vriese | Merkus pine | Pinaceae
|
| PIMOC | Pinus monophylla Torr. & Fr�m. var. californiarum (Bailey) Silba | Pinus californiarum | Pinaceae
|
| PIMOF | Pinus monophylla Torr. & Fr�m. var. fallax (Little) Silba | singleleaf pinyon | Pinaceae
|
| PIMOM2 | Pinus monophylla Torr. & Fr�m. var. monophylla | singleleaf pinyon | Pinaceae
|
| PIMO | Pinus monophylla Torr. & Fr�m. | singleleaf pinyon | Pinaceae
|
| PIMO6 | Pinus montana Miller | Pinus mugo | Pinaceae
|
| PIMO3 | Pinus monticola Dougl. ex D. Don | western white pine | Pinaceae
|
| PIMU80 | Pinus mugo Turra | mugo pine | Pinaceae
|
| PIMUB | Pinus muricata D. Don var. borealis D.I. Axelrod | Bishop pine | Pinaceae
|
| PIMUM | Pinus muricata D. Don var. muricata | Bishop pine | Pinaceae
|
| PIMUR2 | Pinus muricata D. Don var. remorata (Mason) Silba | Bishop pine | Pinaceae
|
| PIMUS | Pinus muricata D. Don var. stantonii D.I. Axelrod | Bishop pine | Pinaceae
|
| PIMU | Pinus muricata D. Don | Bishop pine | Pinaceae
|
| PIMU6 | Pinus murrayana Grev. & Balf. | Pinus contorta var. murrayana | Pinaceae
|
| PINIA | Pinus nigra Arnold var. austriaca (Hoess) Aschers. & Graebn. | Pinus nigra | Pinaceae
|
| PINI | Pinus nigra Arnold | Austrian pine | Pinaceae
|
| PIPA2 | Pinus palustris P. Mill. | longleaf pine | Pinaceae
|
| PIPA13 | Pinus patula Schiede ex Schltdl. & Cham. | Mexican weeping pine | Pinaceae
|
| PIPI6 | Pinus pinaster Soland., non Ait. | maritime pine | Pinaceae
|
| PIPI7 | Pinus pinea L. | Italian stone pine | Pinaceae
|
| PIPOA2 | Pinus ponderosa P.& C. Lawson ssp. arizonica (Engelm.) E. Murr. | Pinus arizonica var. arizonica | Pinaceae
|
| PIPOC | Pinus ponderosa P.& C. Lawson ssp. coulteri (D. Don) E. Murr. | Pinus coulteri | Pinaceae
|
| PIPOJ | Pinus ponderosa P.& C. Lawson ssp. jeffreyi (Grev. & Balf.) E. Murr. | Pinus jeffreyi | Pinaceae
|
| PIPOS2 | Pinus ponderosa P.& C. Lawson ssp. scopulorum (Engelm.) E. Murr. | Pinus ponderosa var. scopulorum | Pinaceae
|
| PIPOW | Pinus ponderosa P.& C. Lawson ssp. washoensis (Mason & Stockwell) E. Murr. | Pinus washoensis | Pinaceae
|
| PIPOA | Pinus ponderosa P.& C. Lawson var. arizonica (Engelm.) Shaw | Pinus arizonica var. arizonica | Pinaceae
|
| PIPOP | Pinus ponderosa P.& C. Lawson var. ponderosa | ponderosa pine | Pinaceae
|
| PIPOS | Pinus ponderosa P.& C. Lawson var. scopulorum Engelm. | ponderosa pine | Pinaceae
|
| PIPO | Pinus ponderosa P.& C. Lawson | ponderosa pine | Pinaceae
|
| PIPU5 | Pinus pungens Lamb. | Table Mountain pine | Pinaceae
|
| PIQU | Pinus quadrifolia Parl. ex Sudworth | Parry pinyon | Pinaceae
|
| PIRAB | Pinus radiata D. Don var. binata auct. non (S. Wats.) Lemmon | Pinus radiata | Pinaceae
|
| PIRA2 | Pinus radiata D. Don | Monterey pine | Pinaceae
|
| PIRE6 | Pinus reflexa (Engelm.) Engelm. | Pinus strobiformis | Pinaceae
|
| PIRE2 | Pinus remorata Mason | Pinus muricata var. remorata | Pinaceae
|
| PIRE5 | Pinus remota (Little) D.K. Bailey & Hawksworth | papershell pinyon | Pinaceae
|
| PIRE | Pinus resinosa Soland. | red pine | Pinaceae
|
| PIRIS | Pinus rigida P. Mill. ssp. serotina (Michx.) Clausen | Pinus serotina | Pinaceae
|
| PIRI | Pinus rigida P. Mill. | pitch pine | Pinaceae
|
| PISA2 | Pinus sabiniana Dougl. ex Dougl. | California foothill pine | Pinaceae
|
| PISE | Pinus serotina Michx. | pond pine | Pinaceae
|
| PISO | Pinus �sondereggeri H.H. Chapman | | Pinaceae
|
| PIST3 | Pinus strobiformis Engelm. | southwestern white pine | Pinaceae
|
| PISTM | Pinus strobus L. var. monticola (Dougl. ex D. Don) Nutt. | Pinus monticola | Pinaceae
|
| PIST | Pinus strobus L. | eastern white pine | Pinaceae
|
| PISY | Pinus sylvestris L. | Scotch pine | Pinaceae
|
| PITA | Pinus taeda L. | loblolly pine | Pinaceae
|
| PITH3 | Pinus thunbergiana Franco | Japanese black pine | Pinaceae
|
| PITH2 | Pinus thunbergii Parl. | Pinus thunbergiana | Pinaceae
|
| PITOI | Pinus torreyana Parry ex Carr. ssp. insularis Haller | Pinus torreyana var. insularis | Pinaceae
|
| PITOI2 | Pinus torreyana Parry ex Carr. var. insularis (Haller) Siba | Santa Cruz Island Torrey pine | Pinaceae
|
| PITOT2 | Pinus torreyana Parry ex Carr. var. torreyana | Torrey pine | Pinaceae
|
| PITO | Pinus torreyana Parry ex Carr. | Torrey pine | Pinaceae
|
| PIVI2 | Pinus virginiana P. Mill. | Virginia pine | Pinaceae
|
| PIWA3 | Pinus wallichiana A.B. Jacks. | Bhutan pine | Pinaceae
|
| PIWA | Pinus washoensis Mason & Stockwell | Washoe pine | Pinaceae
|
| PINUS | Pinus L. | pine | Pinaceae
|
| PICO5 | Pinzona coriacea Mart. & Zucc. | bejuco de agua | Dilleniaceae
|
| PINZO | Pinzona Mart. & Zucc. | pinzona | Dilleniaceae
|
| PIAD | Piper aduncum L. | higuillo de hoja menuda | Piperaceae
|
| PIAM2 | Piper amalago L. | higuillo de limon | Piperaceae
|
| PIAN6 | Piper angustifolium Lam. | pepper | Piperaceae
|
| PIAU | Piper auritum Kunth | Vera cruz pepper | Piperaceae
|
| PIBE3 | Piper betel L. | betel pepper | Piperaceae
|
| PIBL | Piper blattarum Spreng. | moth pepper | Piperaceae
|
| PICI2 | Piper citrifolium Lam. | Piper jacquemontianum | Piperaceae
|
| PICU | Piper cubeba L. f. | cubeb | Piperaceae
|
| PIDI | Piper dilatatum L.C. Rich. | higuillo | Piperaceae
|
| PIEM | Piper emarginellum Sw. ex Wikstr. | Peperomia emarginella | Piperaceae
|
| PIGL5 | Piper glabellum Sw. | Peperomia glabella | Piperaceae
|
| PIGL3 | Piper glabrescens (Miq.) C. DC. | Guyanese pepper | Piperaceae
|
| PIGU3 | Piper guineense Schumacher & Thonn. | pepper | Piperaceae
|
| PIHE4 | Piper hernandiifolium Vahl | Peperomia hernandiifolia | Piperaceae
|
| PIHI2 | Piper hispidum Sw. | Jamaican pepper | Piperaceae
|