| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PYCHP | Pyrola chlorantha Sw. var. paucifolia Fern. | Pyrola chlorantha | Pyrolaceae
|
| PYCHR | Pyrola chlorantha Sw. var. revoluta Jennings | Pyrola chlorantha | Pyrolaceae
|
| PYCH | Pyrola chlorantha Sw. | greenflowered wintergreen | Pyrolaceae
|
| PYCO6 | Pyrola compacta Jennings | Pyrola elliptica | Pyrolaceae
|
| PYCO5 | Pyrola conardiana Andres | Pyrola picta | Pyrolaceae
|
| PYCO3 | Pyrola convoluta W. Bart. | Pyrola chlorantha | Pyrolaceae
|
| PYDEA | Pyrola dentata Sm. var. apophylla Copeland | Pyrola picta | Pyrolaceae
|
| PYDEI | Pyrola dentata Sm. var. integra Gray | Pyrola picta | Pyrolaceae
|
| PYDE | Pyrola dentata Sm. | Pyrola picta | Pyrolaceae
|
| PYEL2 | Pyrola elata Nutt. | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYEL | Pyrola elliptica Nutt. | waxflower shinleaf | Pyrolaceae
|
| PYGO | Pyrola gormanii Rydb. | Pyrola grandiflora | Pyrolaceae
|
| PYGRC | Pyrola grandiflora Radius var. canadensis (Andres) Porsild | Pyrola grandiflora | Pyrolaceae
|
| PYGRG | Pyrola grandiflora Radius var. gormanii Rydb. | Pyrola grandiflora | Pyrolaceae
|
| PYGR | Pyrola grandiflora Radius | largeflowered wintergreen | Pyrolaceae
|
| PYMIP | Pyrola minor L. var. parviflora Boivin | Pyrola minor | Pyrolaceae
|
| PYMI | Pyrola minor L. | snowline wintergreen | Pyrolaceae
|
| PYOB | Pyrola obovata Bertol. | Pyrola americana | Pyrolaceae
|
| PYOC | Pyrola occidentalis R. Br. ex D. Don | Pyrola grandiflora | Pyrolaceae
|
| PYOX | Pyrola oxypetala Austin ex Gray | Pyrola chlorantha | Pyrolaceae
|
| PYPA | Pyrola pallida Greene | Pyrola picta | Pyrolaceae
|
| PYPA2 | Pyrola paradoxa Andres | Pyrola picta | Pyrolaceae
|
| PYPID | Pyrola picta Sm. ssp. dentata (Sm.) Piper | Pyrola picta | Pyrolaceae
|
| PYPII | Pyrola picta Sm. ssp. integra (Gray) Piper | Pyrola picta | Pyrolaceae
|
| PYPIP | Pyrola picta Sm. ssp. pallida Andres | Pyrola picta | Pyrolaceae
|
| PYPID2 | Pyrola picta Sm. var. dentata (Sm.) Dorn | Pyrola picta | Pyrolaceae
|
| PYPI2 | Pyrola picta Sm. | whiteveined wintergreen | Pyrolaceae
|
| PYROA2 | Pyrola rotundifolia L. ssp. americana (Sweet) Clausen | Pyrola americana | Pyrolaceae
|
| PYROA3 | Pyrola rotundifolia L. ssp. asarifolia (Michx.) A.& D. L�ve | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYROA | Pyrola rotundifolia L. var. americana (Sweet) Fern. | Pyrola americana | Pyrolaceae
|
| PYRO | Pyrola rotundifolia auct. p.p. non L. | Pyrola americana | Pyrolaceae
|
| PYSEO2 | Pyrola secunda L. ssp. obtusata (Turcz.) Hult�n | Orthilia secunda | Pyrolaceae
|
| PYSEO | Pyrola secunda L. var. obtusata Turcz. | Orthilia secunda | Pyrolaceae
|
| PYSE | Pyrola secunda L. | Orthilia secunda | Pyrolaceae
|
| PYSE4 | Pyrola septentrionalis Andres | Pyrola picta | Pyrolaceae
|
| PYSP | Pyrola sparsifolia Suksdorf | Pyrola picta | Pyrolaceae
|
| PYULG | Pyrola uliginosa Torr. & Gray ex Torr. var. gracilis Jennings | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYUL | Pyrola uliginosa Torr. & Gray ex Torr. | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYUN | Pyrola uniflora L. | Moneses uniflora | Pyrolaceae
|
| PYVIC | Pyrola virens Schreb. var. convoluta (W. Bart.) Fern. | Pyrola chlorantha | Pyrolaceae
|
| PYVIS | Pyrola virens Schreb. var. saximontana Fern. | Pyrola chlorantha | Pyrolaceae
|
| PYVI3 | Pyrola virens Schreb. | Pyrola chlorantha | Pyrolaceae
|
| PYROL | Pyrola L. | wintergreen | Pyrolaceae
|
| PYIG2 | Pyrostegia ignea (Vell.) K. Presl | Pyrostegia venusta | Bignoniaceae
|
| PYVE2 | Pyrostegia venusta (Ker-Gawl.) Miers | flamevine | Bignoniaceae
|
| PYROS | Pyrostegia K. Presl | pyrostegia | Bignoniaceae
|
| PYSP4 | Pyrrhobryum spiniforme (Hedw.) Mitt. | pyrrhobryum moss | Rhizogoniaceae
|
| PYRRH3 | Pyrrhobryum Mitt. | pyrrhobryum moss | Rhizogoniaceae
|
| PYCAG | Pyrrhopappus carolinianus (Walt.) DC. var. georgianus (Shinners) Ahles | Pyrrhopappus carolinianus | Asteraceae
|
| PYCA2 | Pyrrhopappus carolinianus (Walt.) DC. | Carolina desert-chicory | Asteraceae
|
| PYGE4 | Pyrrhopappus geiseri Shinners | Pyrrhopappus pauciflorus | Asteraceae
|
| PYGE2 | Pyrrhopappus georgianus Shinners | Pyrrhopappus carolinianus | Asteraceae
|
| PYGR2 | Pyrrhopappus grandiflorus (Nutt.) Nutt. | tuberous desert-chicory | Asteraceae
|
| PYMUG | Pyrrhopappus multicaulis DC. var. geiseri (Shinners) Northington | Pyrrhopappus pauciflorus | Asteraceae
|
| PYMU2 | Pyrrhopappus multicaulis DC. | Pyrrhopappus pauciflorus | Asteraceae
|
| PYPA4 | Pyrrhopappus pauciflorus (D. Don) DC. | smallflower desert-chicory | Asteraceae
|
| PYRO2 | Pyrrhopappus rothrockii Gray | Pyrrhopappus pauciflorus | Asteraceae
|
| PYSC | Pyrrhopappus scaposus DC. | Pyrrhopappus grandiflorus | Asteraceae
|
| PYRRH | Pyrrhopappus DC. | desert-chicory | Asteraceae
|
| PYCI4 | Pyrrhospora cinnabarina (Sommerf.) Choisy | | Lecanoraceae
|
| PYEL5 | Pyrrhospora elabens (Fr.) Hafellner | | Lecanoraceae
|
| PYQU2 | Pyrrhospora quernea (Dickson) Korber | | Lecanoraceae
|
| PYRU3 | Pyrrhospora russula (Ach.) Hafellner | | Lecanoraceae
|
| PYSU10 | Pyrrhospora subcinnabarina (Tonsberg) Hafellner | | Lecanoraceae
|
| PYVA | Pyrrhospora varians (Ach.) R. C. Harris | | Lecanoraceae
|
| PYRRH2 | Pyrrhospora Korber | pyrrhospora | Lecanoraceae
|
| PYAP2 | Pyrrocoma apargioides (Gray) Greene | alpineflames | Asteraceae
|
| PYCAC2 | Pyrrocoma carthamoides Hook. var. carthamoides | largeflower goldenweed | Asteraceae
|
| PYCAC3 | Pyrrocoma carthamoides Hook. var. cusickii (Gray) Kartesz & Gandhi | largeflower goldenweed | Asteraceae
|
| PYCAS | Pyrrocoma carthamoides Hook. var. subsquarrosa (Greene) G. Brown & Keil | largeflower goldenweed | Asteraceae
|
| PYCA3 | Pyrrocoma carthamoides Hook. | largeflower goldenweed | Asteraceae
|
| PYCLC | Pyrrocoma clementis Rydb. var. clementis | tranquil goldenweed | Asteraceae
|
| PYCLV | Pyrrocoma clementis Rydb. var. villosa (Rydb.) Mayes ex G. Brown & Keil | tranquil goldenweed | Asteraceae
|
| PYCL2 | Pyrrocoma clementis Rydb. | tranquil goldenweed | Asteraceae
|
| PYCO7 | Pyrrocoma congesta Greene | Pyrrocoma racemosa var. congesta | Asteraceae
|
| PYCRC | Pyrrocoma crocea (Gray) Greene var. crocea | curlyhead goldenweed | Asteraceae
|
| PYCRG | Pyrrocoma crocea (Gray) Greene var. genuflexa (Greene) Mayes ex G. Brown & Keil | curlyhead goldenweed | Asteraceae
|
| PYCR2 | Pyrrocoma crocea (Gray) Greene | curlyhead goldenweed | Asteraceae
|
| PYGE3 | Pyrrocoma genuflexa Greene | Pyrrocoma crocea var. genuflexa | Asteraceae
|
| PYGO2 | Pyrrocoma gossypina Greene | Pyrrocoma uniflora var. gossypina | Asteraceae
|
| PYHIH | Pyrrocoma hirta (Gray) Greene var. hirta | tacky goldenweed | Asteraceae
|
| PYHIL | Pyrrocoma hirta (Gray) Greene var. lanulosa (Greene) Mayes ex G. Brown & Keil | tacky goldenweed | Asteraceae
|
| PYHIS | Pyrrocoma hirta (Gray) Greene var. sonchifolia (Greene) Kartesz & Gandhi | tacky goldenweed | Asteraceae
|
| PYHI | Pyrrocoma hirta (Gray) Greene | tacky goldenweed | Asteraceae
|
| PYHO3 | Pyrrocoma howellii (Gray) Greene | Pyrrocoma uniflora var. uniflora | Asteraceae
|
| PYIN2 | Pyrrocoma insecticruris Henderson | wholeleaf goldenweed | Asteraceae
|
| PYIN3 | Pyrrocoma integrifolia (Porter ex Gray) Greene | manysted goldenweed | Asteraceae
|
| PYLAL | Pyrrocoma lanceolata (Hook.) Greene var. lanceolata | lanceleaf goldenweed | Asteraceae
|
| PYLAS | Pyrrocoma lanceolata (Hook.) Greene var. subviscosa (Greene) Mayes ex G. Brown & Keil | lanceleaf goldenweed | Asteraceae
|
| PYLA | Pyrrocoma lanceolata (Hook.) Greene | lanceleaf goldenweed | Asteraceae
|
| PYLA3 | Pyrrocoma lanulosa Greene | Pyrrocoma hirta var. lanulosa | Asteraceae
|
| PYLI | Pyrrocoma liatriformis Greene | smallhead goldenweed | Asteraceae
|
| PYLI2 | Pyrrocoma linearis (Keck) Kartesz & Gandhi | thinleaf goldenhead | Asteraceae
|
| PYLU | Pyrrocoma lucida (Keck) Kartesz & Gandhi | sticky goldenweed | Asteraceae
|
| PYRAC2 | Pyrrocoma racemosa (Nutt.) Torr. & Gray var. congesta (Greene) Mayes ex G. Brown & Keil | clustered goldenweed | Asteraceae
|
| PYRAP2 | Pyrrocoma racemosa (Nutt.) Torr. & Gray var. paniculata (Nutt.) Kartesz & Gandhi | clustered goldenweed | Asteraceae
|
| PYRAP | Pyrrocoma racemosa (Nutt.) Torr. & Gray var. pinetorum (Keck) Kartesz & Gandhi | clustered goldenweed | Asteraceae
|
| PYRAR | Pyrrocoma racemosa (Nutt.) Torr. & Gray var. racemosa | clustered goldenweed | Asteraceae
|
| PYRAS | Pyrrocoma racemosa (Nutt.) Torr. & Gray var. sessiliflora (Greene) Mayes ex G. Brown and Keil | clustered goldenweed | Asteraceae
|
| PYRA | Pyrrocoma racemosa (Nutt.) Torr. & Gray | clustered goldenweed | Asteraceae
|
| PYRA2 | Pyrrocoma radiata Nutt. | ray goldenweed | Asteraceae
|