| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| BUCR | Buellia crystallifera (Vainio) Hav. | disc lichen | Physciaceae
|
| BUCU3 | Buellia curatellae Malme | disc lichen | Physciaceae
|
| BUCU4 | Buellia curtisii (Tuck.) Imshaug | Curtis' disc lichen | Physciaceae
|
| BUDI2 | Buellia dialyta (Nyl.) Tuck. | disc lichen | Physciaceae
|
| BUDI60 | Buellia disciformis (Fr.) Mudd | disc lichen | Physciaceae
|
| BUDI3 | Buellia dispersa A. Massal. | disc lichen | Physciaceae
|
| BUEL2 | Buellia elegans Poelt | elegant disc lichen | Physciaceae
|
| BUEL3 | Buellia elizae (Tuck.) Tuck. | disc lichen | Physciaceae
|
| BUEP | Buellia epigaea (Pers.) Tuck. | disc lichen | Physciaceae
|
| BUEP2 | Buellia epipolia (Ach.) Mong. | Diplotomma epipolium | Physciaceae
|
| BUER2 | Buellia erubescens Arnold | disc lichen | Physciaceae
|
| BUFI | Buellia fimbriata (Tuck.) Imshaug | disc lichen | Physciaceae
|
| BUGE | Buellia geophila (Florke ex Sommerf.) Lynge | rock disc lichen | Physciaceae
|
| BUGL4 | Buellia glaucomarioides Willey ex Tuck. | Dactylospora glaucomarioides | Dactylosporaceae
|
| BUGL3 | Buellia glauziouana (Krempelh.) Mull. Arg. | Buellia mamillana | Physciaceae
|
| BUGR2 | Buellia griseovirens (Turner & Borrer ex Sm.) Almb. | disc lichen | Physciaceae
|
| BUHA2 | Buellia halonia (Ach.) Tuck. | disc lichen | Physciaceae
|
| BUHA3 | Buellia hassei Imshaug | Buellia griseovirens | Physciaceae
|
| BUIM | Buellia immersa Lynge | water disc lichen | Physciaceae
|
| BUIM3 | Buellia imshaugiana R. C. Harris | disc lichen | Physciaceae
|
| BUIM2 | Buellia imshaugii Hafellner | Imshaug's disc lichen | Physciaceae
|
| BUIN2 | Buellia inquilina Tuck. | Dactylospora inquilina | Dactylosporaceae
|
| BUIN | Buellia insignis (Nageli ex Hepp) Th. Fr. | disc lichen | Physciaceae
|
| BUJU3 | Buellia jugorum (Arnold) Arnold | disc lichen | Physciaceae
|
| BULA5 | Buellia lacteoidea de Lesd. | disc lichen | Physciaceae
|
| BULA6 | Buellia lauricassiae (Fee) Mull. Arg. | disc lichen | Physciaceae
|
| BULE | Buellia lecanoroides H. Magn. | lecanora disc lichen | Physciaceae
|
| BULE2 | Buellia lepidastra (Tuck.) Tuck. | disc lichen | Physciaceae
|
| BULE3 | Buellia leptocline (Flotow) A. Massal. | disc lichen | Physciaceae
|
| BULE4 | Buellia leucomela Imshaug | Amandinea leucomela | Physciaceae
|
| BUMA4 | Buellia malmei Lynge | Buellia aethalia | Physciaceae
|
| BUMA2 | Buellia mamillana (Tuck.) W. A. Weber | disc lichen | Physciaceae
|
| BUMA3 | Buellia maritima (A. Massal.) Bagl. | seaside disc lichen | Physciaceae
|
| BUME2 | Buellia melanochroa (Krempelh.) Mull. Arg. | disc lichen | Physciaceae
|
| BUMI3 | Buellia microbola (Tuck. ex Fink) Sheard | disc lichen | Physciaceae
|
| BUMO3 | Buellia modesta (Krempelh.) Mull. Arg. | disc lichen | Physciaceae
|
| BUMO4 | Buellia moriopsis (A. Massal.) Th. Fr. | Orphniospora moriopsis | Fuscideaceae
|
| BUMY | Buellia myriocarpa (DC.) De Not. | Amandinea punctata | Physciaceae
|
| BUNA | Buellia nantiana de Lesd. | disc lichen | Physciaceae
|
| BUNI2 | Buellia nigra (Fink) Sheard | black disc lichen | Physciaceae
|
| BUNI3 | Buellia nivalis (Bagl. & Car.) Hertel ex Hafellner | Diplotomma nivalis | Physciaceae
|
| BUNO | Buellia notabilis Lynge | disc lichen | Physciaceae
|
| BUNO2 | Buellia novomexicana de Lesd. | New Mexican disc lichen | Physciaceae
|
| BUOC | Buellia ocellata (Flotow) Korber | disc lichen | Physciaceae
|
| BUOI | Buellia oidalea (Nyl.) Tuck. | disc lichen | Physciaceae
|
| BUPA3 | Buellia pachnidisca R. C. Harris | disc lichen | Physciaceae
|
| BUPA60 | Buellia papillata (Sommerf.) Tuck. | disc lichen | Physciaceae
|
| BUPA4 | Buellia parasema (Ach.) De Not. | Buellia disciformis | Physciaceae
|
| BUPE | Buellia penichra (Tuck.) Hasse | Diplotomma penichrum | Physciaceae
|
| BUPE2 | Buellia pertusariicola Willey ex Tuck. | Dactylospora pertusariicola | Dactylosporaceae
|
| BUPL | Buellia placodiomorpha Vainio | disc lichen | Physciaceae
|
| BUPO2 | Buellia polyspora (Willey) Vainio | Amandinea polyspora | Physciaceae
|
| BUPR | Buellia pruinella Imshaug | Buellia fimbriata | Physciaceae
|
| BUPU4 | Buellia pueblae de Lesd. | Buellia retrovertens | Physciaceae
|
| BUPU5 | Buellia pulchella (Schrader) Tuck. | Catolechia wahlenbergii | Rhizocarpaceae
|
| BUPU6 | Buellia pullata Tuck. | Amandinea punctata | Physciaceae
|
| BUPU2 | Buellia pulverulenta (Anzi) Jatta | disc lichen | Physciaceae
|
| BUPUP | Buellia punctata (Hoffm.) A. Massal. var. polyspora (Willey in Tuck.) Fink | Amandinea polyspora | Physciaceae
|
| BUPU3 | Buellia punctata (Hoffm.) A. Massal. | Amandinea punctata | Physciaceae
|
| BURA3 | Buellia radiata Tuck. | Dimelaena radiata | Physciaceae
|
| BURA5 | Buellia rappii Imshaug ex R. C. Harris | disc lichen | Physciaceae
|
| BURE2 | Buellia retrovertens Tuck. | disc lichen | Physciaceae
|
| BURI2 | Buellia rinodinospora Riddle | Hafellia parastata | Physciaceae
|
| BURU4 | Buellia rubifaciens R. C. Harris | disc lichen | Physciaceae
|
| BUSA3 | Buellia saurina W. A. Weber | disc lichen | Physciaceae
|
| BUSA4 | Buellia saxicola de Lesd. | disc lichen | Physciaceae
|
| BUSC4 | Buellia scabrosa (Ach.) A. Massal. | Epilichen scabrosus | Rhizocarpaceae
|
| BUSC3 | Buellia schaereri De Not. | Schaerer's disc lichen | Physciaceae
|
| BUSE4 | Buellia semitensis Tuck. | disc lichen | Physciaceae
|
| BUSI2 | Buellia silicicola de Lesd. | disc lichen | Physciaceae
|
| BUSM2 | Buellia smaragdula de Lesd. | disc lichen | Physciaceae
|
| BUSP2 | Buellia spuria (Schaerer) Anzi | disc lichen | Physciaceae
|
| BUST2 | Buellia stellulata (Taylor) Mudd | disc lichen | Physciaceae
|
| BUST3 | Buellia stigmaea Tuck. | disc lichen | Physciaceae
|
| BUST4 | Buellia stigmatea Korber | disc lichen | Physciaceae
|
| BUST5 | Buellia stillingiana J. Steiner | Stilling's disc lichen | Physciaceae
|
| BUTE3 | Buellia tergestina J. Steiner & Zahlbr. | Buellia dispersa | Physciaceae
|
| BUTH2 | Buellia thomae (Tuck.) Imshaug | Buellia mamillana | Physciaceae
|
| BUTR2 | Buellia triphragmioides Anzi | disc lichen | Physciaceae
|
| BUTU2 | Buellia tucsonensis Zahlbr. | Buellia retrovertens | Physciaceae
|
| BUTU | Buellia turgescens Tuck. | disc lichen | Physciaceae
|
| BUTU3 | Buellia turgescentoides Fink | Buellia turgescens | Physciaceae
|
| BUUB | Buellia uberior Anzi | disc lichen | Physciaceae
|
| BUVE3 | Buellia venusta (Korber) Lettau | Diplotomma venustum | Physciaceae
|
| BUVE2 | Buellia vernicoma (Tuck.) Tuck. | disc lichen | Physciaceae
|
| BUVE4 | Buellia verruculosa (Sm.) Mudd | Buellia aethalia | Physciaceae
|
| BUVE5 | Buellia verruculosa auct. | Buellia ocellata | Physciaceae
|
| BUVI | Buellia vilis Th. Fr. | disc lichen | Physciaceae
|
| BUWA2 | Buellia wahlenbergii (Ach.) Sheard | Catolechia wahlenbergii | Rhizocarpaceae
|
| BUWH | Buellia wheeleri R. C. Harris | Wheeler's disc lichen | Physciaceae
|
| BUZA | Buellia zahlbruckneri J. Steiner | Buellia erubescens | Physciaceae
|
| BUELL | Buellia De Not. | disc lichen | Physciaceae
|
| BUIN4 | Buelliella inquilina (Tuck.) Fink | Dactylospora inquilina | Dactylosporaceae
|
| BUMI4 | Buelliella minimula (Tuck.) Fink | | Physciaceae
|
| BUNU | Buelliella nuttallii (Calk. & Nyl.) Fink | Dactylospora lobariella | Dactylosporaceae
|
| BUPA8 | Buelliella parmeliarum (Sommerf.) Fink | Abrothallus parmeliarum | Uncertain Lichen Family
|
| BUPH | Buelliella physciicola Poelt & Hafellner | | Physciaceae
|
| BUSA5 | Buelliella saxatilis (Schaerer) Fink | Dactylospora saxatilis var. saxatilis | Dactylosporaceae
|
| BUTR3 | Buelliella trypethelii (Tuck.) Fink | | Physciaceae
|
| BUELL2 | Buelliella Fink | buelliella | Physciaceae
|
| BUPA6 | Buelliopsis papillata (Sommerf.) Fink | Buellia papillata | Physciaceae
|