| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| PYTA | Pyrenopsis tasmanica Nyl. | | Lichinaceae
|
| PYVI4 | Pyrenopsis viridirufa Tuck. | | Lichinaceae
|
| PYREN3 | Pyrenopsis (Nyl.) Nyl. | pyrenopsis | Lichinaceae
|
| PYBR4 | Pyrenothamnia brandegei (Tuck.) Zahlbr. | Endocarpon pulvinatum | Verrucariaceae
|
| PYSP3 | Pyrenothamnia spraguei Tuck. | Endocarpon pulvinatum | Verrucariaceae
|
| PYNI2 | Pyrenothrix nigra Riddle | | Pyrenotrichaceae
|
| PYREN4 | Pyrenothrix Riddle | pyrenothrix | Pyrenotrichaceae
|
| PYAC | Pyrenula acutalis R. C. Harris | wart lichen | Pyrenulaceae
|
| PYAC3 | Pyrenula acutispora Kalb & Hafellner | wart lichen | Pyrenulaceae
|
| PYAN3 | Pyrenula anomala (Ach.) Vainio | wart lichen | Pyrenulaceae
|
| PYAQ | Pyrenula aquila R. C. Harris | wart lichen | Pyrenulaceae
|
| PYAS2 | Pyrenula aspistea (Ach.) Ach. | wart lichen | Pyrenulaceae
|
| PYAS3 | Pyrenula astroidea (Fee) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYAT2 | Pyrenula atrolaminata R. C. Harris | wart lichen | Pyrenulaceae
|
| PYBA4 | Pyrenula bahiana Malme | Pyrenula concatervans | Pyrenulaceae
|
| PYCA9 | Pyrenula caryae R. C. Harris | wart lichen | Pyrenulaceae
|
| PYCE | Pyrenula cerina Eschw. | wart lichen | Pyrenulaceae
|
| PYCI2 | Pyrenula cinerea Zahlbr. | Pyrenula microcarpa | Pyrenulaceae
|
| PYCI | Pyrenula citriformis R. C. Harris | wart lichen | Pyrenulaceae
|
| PYCO9 | Pyrenula cocoes Mull. Arg. | wart lichen | Pyrenulaceae
|
| PYCO10 | Pyrenula concatervans (Nyl.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYCO11 | Pyrenula confoederata R. C. Harris | wart lichen | Pyrenulaceae
|
| PYCO12 | Pyrenula corticata (Mull. Arg.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYCR3 | Pyrenula cruenta (Mont.) Vainio | wart lichen | Pyrenulaceae
|
| PYCR4 | Pyrenula cruentata (Mull. Arg.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYCU3 | Pyrenula cubana (Mull. Arg.) R. C. Harris | Cuban wart lichen | Pyrenulaceae
|
| PYCU2 | Pyrenula cuyabensis (Malme) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYER | Pyrenula erumpens R. C. Harris | wart lichen | Pyrenulaceae
|
| PYFA2 | Pyrenula falsaria (Zahlbr.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYFA3 | Pyrenula farrea auct. | Eupatorium leucolepis | Asteraceae
|
| PYFU4 | Pyrenula fulvella R. C. Harris | Pyrenula personata | Pyrenulaceae
|
| PYGL2 | Pyrenula glabrata (Ach.) A. Massal. | Pyrenula laevigata | Pyrenulaceae
|
| PYHE | Pyrenula herrei Fink | Arthopyrenia plumbaria | Arthopyreniaceae
|
| PYIM | Pyrenula imperfecta (Ellis & Everh.) R. C. Harris | Pyrenula subelliptica | Pyrenulaceae
|
| PYLA5 | Pyrenula laetior Mull. Arg. | wart lichen | Pyrenulaceae
|
| PYLA4 | Pyrenula laevigata (Pers.) Arnold | wart lichen | Pyrenulaceae
|
| PYLEP | Pyrenula leucoplaca (Wallr.) Korber var. pluriloculata Fink | Eopyrenula intermedia | Pleomassariaceae
|
| PYLE3 | Pyrenula leucostoma Ach. | wart lichen | Pyrenulaceae
|
| PYLU3 | Pyrenula lucifera R. C. Harris | wart lichen | Pyrenulaceae
|
| PYMA3 | Pyrenula macounii R. C. Harris | Macoun's wart lichen | Pyrenulaceae
|
| PYMA4 | Pyrenula macularis (Zahlbr.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYMA5 | Pyrenula maculata (R. C. Harris) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYMA9 | Pyrenula mamillana (Ach.) Trevisan | wart lichen | Pyrenulaceae
|
| PYMA6 | Pyrenula marginata Hook. | Pyrenula mamillana | Pyrenulaceae
|
| PYMA7 | Pyrenula martinicana (Vainio) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYME3 | Pyrenula megalospora Fink | Acrocordia megalospora | Monoblastiaceae
|
| PYMI5 | Pyrenula micheneri R. C. Harris | Michener's wart lichen | Pyrenulaceae
|
| PYMI6 | Pyrenula microcarpa Mull. Arg. | wart lichen | Pyrenulaceae
|
| PYMI7 | Pyrenula microtheca R. C. Harris | wart lichen | Pyrenulaceae
|
| PYMU4 | Pyrenula mucosa (Vainio) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYNE | Pyrenula neglecta R. C. Harris | Pyrenula pseudobufonia | Pyrenulaceae
|
| PYNIM | Pyrenula nitidella (Florke ex Schaerer) Mull. Arg. var. maculata R. C. Harris | Pyrenula maculata | Pyrenulaceae
|
| PYNI3 | Pyrenula nitidula (Bresadola) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYOC2 | Pyrenula occidentalis (R. C. Harris) R. C. Harris | western wart lichen | Pyrenulaceae
|
| PYOC3 | Pyrenula ochraceoflava (Nyl.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYOC4 | Pyrenula ochraceoflavens (Nyl.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYOL | Pyrenula oleosa R. C. Harris | wart lichen | Pyrenulaceae
|
| PYPE2 | Pyrenula personata (Malme) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYPL2 | Pyrenula plittii R. C. Harris | Plitt's wart lichen | Pyrenulaceae
|
| PYPS | Pyrenula pseudobufonia (Rehm) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYPU4 | Pyrenula punctella (Nyl.) Trevisan | wart lichen | Pyrenulaceae
|
| PYPY3 | Pyrenula pyrenuloides (Mont.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYQU | Pyrenula quassiaecola Fee | wart lichen | Pyrenulaceae
|
| PYRA4 | Pyrenula ravenelii (Tuck.) R. C. Harris | Ravenel's wart lichen | Pyrenulaceae
|
| PYRU2 | Pyrenula rubrostoma R. C. Harris | wart lichen | Pyrenulaceae
|
| PYSA3 | Pyrenula santensis (Eschw.) Mull. Arg. | wart lichen | Pyrenulaceae
|
| PYSE6 | Pyrenula septicollaris (Eschw.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYSU4 | Pyrenula subelliptica (Tuck.) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYSU5 | Pyrenula subferruginea (Malme) R. C. Harris | wart lichen | Pyrenulaceae
|
| PYTE2 | Pyrenula tenuisepta R. C. Harris | wart lichen | Pyrenulaceae
|
| PYTE3 | Pyrenula texana Tuck. ex R. C. Harris | Pyrenula microcarpa | Pyrenulaceae
|
| PYTH | Pyrenula thelomorpha Tuck. | wart lichen | Pyrenulaceae
|
| PYWE | Pyrenula wetmorei R. C. Harris | wart lichen | Pyrenulaceae
|
| PYWH | Pyrenula wheeleri R. C. Harris | wart lichen | Pyrenulaceae
|
| PYXY | Pyrenula xyloides (Eschw.) Mull. Arg. | Pyrenula mamillana | Pyrenulaceae
|
| PYREN5 | Pyrenula Ach. | wart lichen | Pyrenulaceae
|
| PYEN | Pyrenulella endococcoidea (Nyl.) Fink | Phaeospora rimosicola | Verrucariaceae
|
| PYAN4 | Pyrethrum anethifolium Willd. | Argyranthemum foeniculum | Asteraceae
|
| PYCI3 | Pyrethrum cinerariifolium Trevir. | Chrysanthemum cinerariifolium | Asteraceae
|
| PYMA2 | Pyrethrum majus (Desf.) Tzvelev | Balsamita major | Asteraceae
|
| PYAM3 | Pyrgillus americanus Nyl. | Pyrgillus javanicus | Pyrenulaceae
|
| PYJA2 | Pyrgillus javanicus (Mont. & v. d. Bosch) Nyl. | | Pyrenulaceae
|
| PYRGI | Pyrgillus Nyl. | pyrgillus | Pyrenulaceae
|
| PYAM | Pyrola americana Sweet | American wintergreen | Pyrolaceae
|
| PYAPL | Pyrola aphylla Sm. var. leptosepala Nutt. | Pyrola picta | Pyrolaceae
|
| PYAPP | Pyrola aphylla Sm. var. paucifolia T.J. Howell | Pyrola picta | Pyrolaceae
|
| PYAP | Pyrola aphylla Sm. | Pyrola picta | Pyrolaceae
|
| PYASA2 | Pyrola asarifolia Michx. ssp. americana (Sweet) Kr�sa | Pyrola americana | Pyrolaceae
|
| PYASA | Pyrola asarifolia Michx. ssp. asarifolia | liverleaf wintergreen | Pyrolaceae
|
| PYASB2 | Pyrola asarifolia Michx. ssp. bracteata (Hook.) Haber | pink wintergreen | Pyrolaceae
|
| PYASB | Pyrola asarifolia Michx. var. bracteata (Hook.) Jepson | Pyrola asarifolia ssp. bracteata | Pyrolaceae
|
| PYASI | Pyrola asarifolia Michx. var. incarnata (DC.) Fern. | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYASO | Pyrola asarifolia Michx. var. ovata Farw. | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYASP | Pyrola asarifolia Michx. var. purpurea (Bunge) Fern. | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYAS | Pyrola asarifolia Michx. | liverleaf wintergreen | Pyrolaceae
|
| PYBL | Pyrola blanda Andres | Pyrola picta | Pyrolaceae
|
| PYBO | Pyrola borealis Rydb. | Pyrola grandiflora | Pyrolaceae
|
| PYBRH | Pyrola bracteata Hook. var. hillii J.K. Henry | Pyrola asarifolia ssp. bracteata | Pyrolaceae
|
| PYBR3 | Pyrola bracteata Hook. | Pyrola asarifolia ssp. bracteata | Pyrolaceae
|
| PYCA6 | Pyrola californica Kr�sa | Pyrola asarifolia ssp. asarifolia | Pyrolaceae
|
| PYCA5 | Pyrola canadensis Andres | Pyrola grandiflora | Pyrolaceae
|