This list updated Jan 2007
M
| Lichen Name | Synonym |
|---|---|
| Macentina abscondita Coppins & Vêzda | = Psoroglaena abscondita |
| Macentina aurantiaca P.M. McCarthy & Vêzda | = Nectria pseudopeziza (Desm.) Rossman {F} |
| Macentina stigonemoides Orange | = Psoroglaena stigonemoides |
| Macrophomina pseudeverniae Etayo & Diederich | = Diederichia pseudeverniae |
| Massalongia carnosa var. determinata (Nyl.) A.L. Sm. | = Massalongia carnosa |
| Massalongia cheilea Mudd | = Fuscopannaria leucophaea |
| %Megalospora pachycarpa (Delise ex Duby) H. Olivier | = Megalospora tuberculosa |
| Melanaria lactescens (Mudd) Erichsen | = Pertusaria lactescens |
| Melanaria urceolaria (Nyl.) Erichsen | = Pertusaria lactescens |
| Melanelia acetabulum (Neck.) Essl. | = Pleurosticta acetabulum |
| Melanelia glabratula (Lamy) Essl. | = Melanelia fuliginosa subsp. glabratula |
| %Melanelixia fuliginosa (Fr. ex Duby) O. Blanco et al. | = Melanelia fuliginosa |
| %Melanelixia fuliginosa subsp. glabratula (Lamy) J.R. Laundon | = Melanelia fuliginosa subsp. glabratula |
| %Melanelixia subargentifera (Nyl.) O. Blanco et al. | = Melanelia subargentifera |
| %Melanelixia subaurifera (Nyl.) O. Blanco et al. | = Melanelia subaurifera |
| %Melanohalea elegantula (Zahlbr.) O. Blanco et al. | = Melanelia elegantula |
| %Melanohalea exasperata (De Not.) O. Blanco et al. | = Melanelia exasperata |
| %Melanohalea exasperatula (Nyl.) O. Blanco et al. | = Melanelia exasperatula |
| %Melanohalea laciniatula (Flagey ex H. Olivier) O. Blanco et al. | = Melanelia laciniatula |
| %Melanohalea septentrionalis (Lynge) O. Blanco et al. | = Melanelia septentrionalis |
| Melanolecia jurana (Schaer.) Hertel | = Farnoldia jurana |
| Melanospora cerebrina (DC.) Mudd | = Poeltinula cerebrina |
| Melanotheca diffusa Leight. | = Tomasellia diffusa {F} |
| Melanotheca gelatinosa (Chevall.) Zahlbr. | = Tomasellia gelatinosa {F} |
| Melanotheca ischnobela Nyl. | = Celothelium ischnobelum |
| Melaspilea constrictella Stirt. | = type and only collection considered not to have originated from the British Isles |
| Melaspilea patersonii Stirt. | = Bactrospora dryina |
| Melaspilea subarenacea J. Nowak & Kiszka | = Melaspilea granitophila |
| Melaspilea vermifera Leight. | = Spirographa fusisporella {LF} |
| Melittiosporium lichenicola (Mont.) Massee | = Diploschistes muscorum |
| Menegazzia pertusa (Schaer.) Stein | = Menegazzia terebrata |
| %Merismatium deminuta (Arnold) Cl. Roux & Nav.-Ros. | = Polyblastia deminuta {?LF} |
| Merismatium lopadii auct. brit. | = Merismatium discrepans {LF} |
| Metasphaeria cetrariicola (Nyl.) Sacc. | = Lichenopeltella cetrariicola {LF} |
| Metasphaeria stereocaulorum (Arnold) Sacc. | = Cercidospora stereocaulorum {LF} |
| Metasphaeria tartarina (Nyl.) Keissl. | = Sagediopsis campsteriana {LF} |
| Micarea bacidiella sensu Vêzda, non (Vain.) Vêzda | = Micarea globulosella |
| Micarea chrysophthalma P. James | = Chrysothrix chrysophthalma |
| Micarea clavulifera (Nyl.) Coppins & P James | = Psilolechia clavulifera |
| Micarea confusula (Nyl.) Hedl. | = Micarea subnigrata |
| Micarea excipulata Coppins | = Micarea lynceola |
| Micarea gomphillacea (Nyl.) Vêzda | = Micarea lignaria var. lignaria |
| Micarea granulans (Vain.) Timdal | = Micarea submilliaria |
| Micarea intrusa (Th. Fr.) Coppins & H. Kilias | = Carbonea intrusa |
| Micarea klementii Coppins ad int. | = Micarea alabastrites |
| Micarea leprosa P. James | = Vezdaea leprosa |
| Micarea lignaria f. gomphillacea (Nyl.) Hedl. | = Micarea lignaria var. lignaria |
| Micarea longispora Coppins ad int. | = Micarea synotheoides |
| Micarea melaenida (Nyl.) Coppins | = incorrectly reported from the British Isles |
| Micarea poliodes (Nyl.) Vêzda | = Micarea lutulata |
| Micarea prasina f. micrococca (Körb.) Hedl. | = Micarea micrococca |
| Micarea subleprosula (Vêzda) Vêzda | = Micarea submilliaria |
| Micarea submoestula (Nyl.) Coppins | = Micarea subconfusa |
| Micarea subviolascens (H. Magn.) Coppins | = Micarea paratropa |
| Micarea verrucula (Norman) Hedl. | = Micarea turfosa |
| Micarea violacea (Crouan ex Nyl.) Hedl. | = Micarea peliocarpa |
| Microcalicium subpedicillatum (Schaer.) Tibell | = Microcalicium disseminatum {F or LF} |
| Microdiplodia ferrugineae Vouaux | = Lichenodiplis lecanorae {LF} |
| Microdiplodia lecanorae Vouaux | = Lichenodiplis lecanorae {LF} |
| Microglaena breadalbanensis Wheldon & A. Wilson | = Protothelenella corrosa |
| Microglaena corrosa (Körb.) Arnold | = Protothelenella corrosa |
| Microglaena holliana A.L. Sm. | = ? Thelenella muscorum var. octospora |
| Microglaena isidioides (Borrer) A.L. Sm. | = Thelotrema isidioides |
| Microglaena larbalestieri A.L. Sm. | = Thelenella larbalestieri |
| Microglaena leucothelia (Anzi) Arnold | = Protothelenella leucothelia; but British records doubtful |
| Microglaena leucothelia (Nyl.) Arnold | = Protothelenella leucothelia; but British records doubtful |
| Microglaena modesta (Nyl.) A.L. Sm. | = Thelenella modesta |
| Microglaena muscorum (Fr.) Th. Fr. | = Thelenella muscorum |
| Microglaena muscorum var. octospora (Nyl.) Cretz. | = Thelenella muscorum var. octospora |
| Microglaena nuda Wheldon & Travis | = Verrucaria sp. |
| Microglaena sericea (A. Massal.) Lönnr. | = Julella sericea {F} |
| Microglaena sphinctrinoidella (Nyl.) Arnold | = Protothelenella sphinctrinoidella |
| Microglaena sphinctrinoides (Nyl.) Lönnr. | = Protothelenella sphinctrinoides |
| Micropeltopsis cetrariicola (Nyl.) Vain. | = Lichenopeltella cetrariicola {LF} |
| Microphiale diluta (Pers.) Zahlbr. | = Dimerella pineti |
| Microphiale lutea (Dicks.) Zahlbr. | = Dimerella lutea |
| Microthelia alcicornaria Linds. | = Lichenosticta alcicornaria {LF} |
| Microthelia baeomycearia Linds. | = ? Pyrenidium actinellum {LF} |
| Microthelia calcaricola Mudd | = Muellerella lichenicola {LF} |
| Microthelia dispora A.L. Sm. | = Polycoccum dzieduszyckii {LF} |
| Microthelia dispora f. octospora Walt. Watson | = Polycoccum marmoratum {LF} |
| Microthelia dissepta (Nyl.) A.L. Sm. | = ? Weddelomyces periphericus {LF} |
| Microthelia exerrans (Nyl.) A.L. Sm. | = Endococcus exerrans {LF} |
| Microthelia leightonii Zahlbr. | = Rinodina bischoffiiv |
| Microthelia marmorata (Kremp.) Hepp | = Polycoccum marmoratum {LF} |
| Microthelia micula auct. | = Mycomicrothelia confusa {F} |
| Microthelia solorinaria Linds. | = Rhagadostoma lichenicola {LF} |
| Microthelia ventosicola Mudd | = Muellerella ventosicola {LF} |
| Miriquidica liljenstroemii (Du Rietz) R. Sant. | = Miriquidica nigroleprosa var. liljenstroemii |
| %Miriquidica pycnocarpa (Körb.) Andreev | = Lecidea pycnocarpa |
| Moelleropsis humida (Kullh.) Coppins | = Gregorella humida |
| Monodictys lepraria (Berk.) M.B. Ellis | = Monodictys cellulosa {LF} |
| Mosigia illita (Nyl.) R. Sant. | = Rimularia badioatra |
| Mosigia intercedens (H. Magn.) R. Sant. | = Rimularia intercedens |
| Mucor furfuraceus L. | = Chaenotheca furfuracea |
| Muellerella atricola (Linds.) Sacc. & D. Sacc. | = ? Muellerella lichenicola {LF} |
| Muellerella haplotella (Nyl.) Arnold | = Muellerella polyspora {LF} |
| Muellerella opegraphicola Zopf | = Muellerella polyspora {LF} |
| Muellerella pygmaea var. ventosicola (Mudd) Triebel | = Muellerella ventosicola {LF} |
| Mycobacidia arenicola (Nyl.) Sacc. & D. Sacc. | = Arthrorhaphis grisea {LF} |
| Mycobacidia flavovirescens (Dicks.) Rehm | = Arthrorhaphis citrinella |
| Mycobilimbia accedens (Arnold) V. Wirth ex Hafellner | = Bilimbia sabuletorum |
| Mycobilimbia ahlesii (Körb.) R. Sant., com. inval. | = Lecidea ahlesii |
| Mycobilimbia berengeriana (A. Massal.) Hafellner & V. Wirth | = Lecidea berengeriana |
| Mycobilimbia carneoalbida (Müll. Arg.) S. Ekman & Printzen | = Biatora carneoalbida |
| Mycobilimbia endocarpicola (Linds.) Vouaux | = ? Toninia verrucarioides |
| Mycobilimbia epixanthoides (Nyl.) Vitik., Ahti, Kuusinen, Lommi & T. Ulvinen in Hafellner & Türk | = Biatora epixanthoides |
| Mycobilimbia fusca (A. Massal.) Hafellner & V. Wirth | = Biatora tetramera |
| Mycobilimbia hypnorum (Lib.) Kalb & Hafellner | = Lecidea hypnorum |
| Mycobilimbia killiasii (Hepp) Rehm | = Bacidia killiasii {LF} |
| Mycobilimbia lobulata (Sommerf.) Hafellner | = Bilimbia lobulata |
| Mycobilimbia lurida (Ach.) Hafellner & Türk | = Psora lurida |
| Mycobilimbia pilularis (Körb.) Hafellner & Türk | = Biatora sphaeroides |
| Mycobilimbia sabuletorum (Schreb.) Hafellner | = Bilimbia sabuletorum |
| Mycobilimbia sphaeroides D.D. Awasthi | = Biatora carneoalbida |
| Mycobilimbia tetramera (De Not.) Vitik., Ahti, Kuusinen, Lommi & T. Ulvinen in Hafellner & Türk | = Biatora tetramera |
| Mycoblastus sterilis Coppins & P. James | = Mycoblastus fucatus |
| Mycoblastus tornoensis (Nyl.) R.A. Anderson | = Japewia tornoensis |
| Mycocalicium parietinum (Ach.) Vain. | = Mycocalicium subtile {F} |
| Mycomelaspilea leciographoides (Vouaux) Keissl. | = Melaspilea leciographoides {LF} |
| Mycoporellum sparsellum (Nyl.) Müll. Arg. | = Mycoporum lacteum {F} |
| Mycoporum hippocastani (DC.) Coppins | = Cyrtidula hippocastani {F} |
| Mycoporum misserrimum Nyl. | = Cyrtidula quercus {F} |
| Mycoporum ptelaeodes (Ach.) Nyl. | = Cyrtidula hippocastani {F} |
| Mycoporum quercus (A. Massal.) Müll. Arg. | = Cyrtidula quercus {F} |
| Mycoporum quercus var. ilicis (Riedl) Coppins | = name of uncertain application (type lost) |
| Mycopyrenula coryli (A. Massal.) Vain. | = Pyrenula coryli {F} |
| Myxobilimbia accedens (Arnold) Hafellner | = Bilimbia sabuletorum |
| Myxobilimbia lobulata (Sommerf.) Hafellner | = Bilimbia lobulata |
| Myxobilimbia sabuletorum (Schreb.) Hafellner | = Bilimbia sabuletorum |
N
| Lichen Name | Synonym |
|---|---|
| %Naetrocymbe atractospora (Müll. Arg.) R.C. Harris | = Arthopyrenia atractospora |
| %Naetrocymbe fraxini (A. Massal.) R.C. Harris | = Arthopyrenia fraxini {F} |
| %Naetrocymbe punctiformis (Pers.) R.C. Harris | = Arthopyrenia punctiformis {F} |
| %Naetrocymbe saxicola (A. Massal.) R.C. Harris | = Arthopyrenia saxicola |
| Nectria epicallopisma (Arnold) Sacc. | = incorrectly reported from the British Isles {LF} |
| Nectria hirta A. Bloxam | = Trichonectria hirta {LF} |
| Nectria indigens (Arnold) Rehm | = Nectriopsis indigens {LF} |
| Nectria insidiosa (Nyl.) Sacc. & D. Sacc. | = Hymenobia aporea {LF} |
| Nectria lecanodes Ces. | = Nectriopsis lecanodes {LF} |
| Nectria parmeliae (Berk. & M.A. Curtis) D. Hawksw. | = Nectriopsis parmeliae {LF} |
| Nectria rubifaciens Ellis & Everh. | = Nectriopsis rubifaciens {LF} |
| Nectriella anisospora Lowen | = Pronectria anisospora {LF} |
| Nectriella robergei (Mont. & Desm.) Weese | = Pronectria robergei {LF} |
| Nectriella tenacis (Vouaux) Weese | = Pronectria tenacis {LF} |
| Nectriella tenuispora | = Pronectria tenuispora {LF} |
| Nectriella tincta auct. brit. | = Pronectria santessonii {LF} |
| Nectriopsis rubefaciens (Ellis & Everh.) M.S. Cole & D. Hawksw. [orth. error] | = Nectriopsis rubifaciens {LF} |
| Nephroma lusitanicum Schaer. | = Nephroma laevigatum |
| #Nephroma resupinatum auct. brit. 19th C p.p. | = Nephroma laevigatum |
| Nephromium laevigatum var. parile (Ach.) Nyl. | = Nephroma parile |
| Nephromium lusitanicum (Schaer.) Nyl. | = Nephroma laevigatum |
| Nephromium lusitanicum var. hibernicum Nyl. ex Leight. | = Nephroma laevigatum |
| Nephromium resupinatum (L.) Fr. | = Nephroma resupinatum |
| Neofuscelia pulla var. delisei (Duby) R. Sant., comb. inval. | = Neofuscelia delisei |
| Nesolechia associata (Th. Fr.) Sacc. & D. Sacc. | = Geltingia associata {LF} |
| Nesolechia cetrariicola (Linds.) Arnold | = ? Phaeopyxis punctum {LF} |
| Nesolechia cladoniaria (Nyl.) Arnold | = ? Phaeopyxis punctum {LF} |
| Nesolechia insita (Stirt.) Vouaux | = Steinia geophana |
| Nesolechia intumescens (Flot.) H. Magn. | = Rimularia insularis |
| Nesolechia lichenicola (A.L. Sm. & Ramsb.) Keissl. | = Lecidea lichenicola |
| Nesolechia neglecta Vain. | = Rhymbocarpus neglectus {LF} |
| Nesolechia nitschkei Körb. | = Skyttea nitschkei {LF} |
| Nesolechia puncta A. Massal. [orth. error] | = Phaeopyxis punctum {LF} |
| Nesolechia punctum A. Massal. | = Phaeopyxis punctum {LF} |
| Nesolechia vitellinaria (Nyl.) Rehm | = Carbonea vitellinaria {LF} |
| Nesolechia vitellinaria var. supersparsa( Nyl.) Keissl. | = Carbonea supersparsa {LF} |
| Nigromacula hypotrachynae Etayo | = Nigromacula uniseptata {LF} |
| Normandina acroglypta (Norman) Aptroot | = Lauderlindsaya acroglypta |
| Normandina erichsenii (Keissl.) Aptroot | = Lauderlindsaya acroglypta |
| Normandina laetevirens (Borrer) Nyl. | = Lichenomphalia hudsoniana |
| Normandina viridis (Ach.) Nyl. | = Lichenomphalia hudsoniana |
O
| Lichen Name | Synonym |
|---|---|
| Ocellularia subtilis auct. brit., non (Tuck.) Riddle | = Thelotrema petractoides |
| Ocellularia subtilis (Tuck.) Riddle | = Thelotrema subtile Tuck.; incorrectly reported from the British Isles |
| Ochrolechia frigida f. lapuensis (Vain.) Coppins | = Ochrolechia frigida |
| Ochrolechia geminipara (Th. Fr.) Vain. | = Pertusaria geminipara |
| Ochrolechia pallescens auct. brit. p.p. | = Ochrolechia szatalaensis |
| Ochrolechia pallescens auct. brit. p.p. | = Ochrolechia parella |
| Ochrolechia parella var. turneri (Sm.) de Lesd. | = Ochrolechia turneri |
| Ochrolechia upsaliensis (L.) A. Massal. | = incorrectly reported from the British Isles |
| Ochrolechia yasudae auct. brit. | = Ochrolechia subviridis |
| Omphalina alpina (Britzelm.) Bresinsky & Stangl | = Lichenomphalia alpina |
| Omphalina cupulatoides P.D. Orton | = Arrhenia peltigerina [LF] |
| Omphalina ericetorum (Pers.:Fr.) M. Lange ex H.E. Bigelow | = Lichenomphalia umbellifera |
| Omphalina fulvopallens P.D. Orton | = Lichenomphalia umbellifera |
| Omphalina hudsoniana (H.S. Jenn.) H.E. Bigelow | = Lichenomphalia hudsoniana |
| Omphalina grisella (Weinm.) M.M. Moser | = Lichenomphalia velutina |
| Omphalina griseopallida (Desm.) Quél. | = Arrhenia griseopallida (Desm.) Watling {F} |
| Omphalina luteolilacina (Favre) D.M. Hend. | = Lichenomphalia hudsoniana |
| Omphalina luteovitellina (Pilát & Nannf.) M. Lange | = Lichenomphalia alpina |
| Omphalina pararustica Clémençon | = Lichenomphalia velutina |
| Omphalina peltigerina (Peck) P. Collin | = Arrhenia peltigerina {LF} |
| Omphalina pseudoandrosacea (Bull.) M.M. Moser | = ? Lichenomphalia umbellifera |
| Omphalina umbellifera (L.:Fr.) Quél. | = Lichenomphalia umbellifera |
| Omphalina velutina (Quél.) Quél. | = Lichenomphalia velutina |
| Opegrapha abscondita Th. Fr. | = Lecanographa abscondita |
| Opegrapha actophila Nyl. | = Opegrapha areniseda |
| Opegrapha anomala Leight. | = Graphina ruiziana |
| Opegrapha atra var. arthonioidea Leight. | = Opegrapha atra |
| Opegrapha atra var. denigrata (Ach.) Schaer. | = Opegrapha atra |
| Opegrapha atra var. nigrata Leight. ex Mudd | = Opegrapha atra |
| Opegrapha atra var. parallela Leight. ex Mudd | = Opegrapha atra |
| Opegrapha atra f. tenuior Nyl. ex Leight. | = Opegrapha atra |
| Opegrapha atricolor Stirt. | = Opegrapha ochrocheila |
| Opegrapha atrula Nyl. | = ? Opegrapha calcarea |
| Opegrapha betulina Sm., non Pers. | = Opegrapha herbarum |
| Opegrapha calcarea var. chevallieri (Leight.) H. Olivier | = Opegrapha calcarea |
| Opegrapha chevallieri Leight. | = Opegrapha calcarea |
| Opegrapha centrifuga A. Massal. | = Opegrapha rupestris {LF} |
| Opegrapha cinerea Chevall. | = Opegrapha vulgata |
| Opegrapha conferta Anzi, non auct. brit. | = Opegrapha saxigena |
| Opegrapha conferta auct. brit. p.p. | = Opegrapha calcarea |
| Opegrapha confluens auct. brit. | = Opegrapha calcarea |
| Opegrapha confluens (Ach.) Stizenb., non auct. brit. | = Opegrapha vulgata |
| Opegrapha contexta Stirt. | = Opegrapha rufescens |
| Opegrapha crassa DC. | = Enterographa crassa |
| %Opegrapha culmigena Lib. | = Opegrapha herbarum |
| Opegrapha decandollei (Stizenb.) Arnold | = Opegrapha calcarea |
| Opegrapha dendritica Ach. | = Phaeographis dendritica |
| Opegrapha devulgata Nyl. | = Opegrapha vulgata |
| Opegrapha diaphora (Ach.) Ach. | = Opegrapha varia |
| Opegrapha dubia Leight. ex Arnold | = Opegrapha niveoatra |
| Opegrapha elegans Borrer ex Sm. | = Graphis elegans |
| Opegrapha grumulosa Dufour | = Lecanographa grumulosa |
| Opegrapha herpetica (Ach.) Ach. | = Opegrapha rufescens |
| Opegrapha horistica (Leight.) Stein | = Opegrapha zonata |
| Opegrapha hutchinsiae (Leight.) Körb. | = Enterographa hutchinsiae |
| Opegrapha hysteriiformis Nyl. | = Opegrapha cesareensis |
| Opegrapha involuta (Wallr.) Jatta | = Opegrapha viridis |
| Opegrapha leightonii Cromb. ex Nyl. | = Opegrapha mougeotii |
| Opegrapha lentiginosa Lyell ex Leight. | = Melaspilea lentiginosa {LF} |
| Opegrapha lichenoides Pers. | = Opegrapha varia |
| Opegrapha lithyrgodes Nyl. | = Opegrapha lithyrga |
| Opegrapha lyellii Sm. | = Phaeographis lyellii |
| Opegrapha lyncea (Sm.) Borrer ex Hook. | = Lecanographa lyncea |
| Opegrapha microscopica Sm. | = Arthonia punctiformis {F} |
| Opegrapha monspeliensis Nyl. | = Opegrapha parasitica {LF} |
| Opegrapha multipunctata Coppins & P. James ad int. | = Opegrapha multipuncta |
| Opegrapha nothiza Nyl. | = Lecanographa grumulosa |
| #Opegrapha parasitica auct. p.max.p. pre-1995 [on endolithic Verrucariaceae] | = Opegrapha rupestris {LF} |
| #Opegrapha parasitica auct. p.min.p. [on Xanthoria parietina] | = Opegrapha physciaria {LF} |
| Opegrapha persoonii (Ach.) Chevall., nom. illeg. | = Opegrapha rupestris {LF} |
| Opegrapha prosiliens Stirt., non Mont. & Bosch | = Opegrapha herbarum |
| Opegrapha protuberans Zahlbr. | = Opegrapha herbarum |
| Opegrapha pseudovaria Coppins ad int. | = Opegrapha xerica |
| Opegrapha pulicaris auct. | = Opegrapha varia |
| Opegrapha pulverulenta Sm., non Pers. | = Graphina anguina auct. europ. |
| Opegrapha rimalis Ach. | = Opegrapha varia |
| Opegrapha rubella auct. brit. p.max.p. | = Opegrapha rufescens |
| Opegrapha rubella sensu Mudd | = ? Opegrapha viridis |
| Opegrapha saxatilis DC., non auct. brit. | = Opegrapha rupestris {LF} |
| Opegrapha saxatilis auct. brit. p.max.p. | = Opegrapha calcarea |
| Opegrapha saxatilis sensu Leight., non DC. | = Opegrapha mougeotii |
| Opegrapha saxicola auct. | = Opegrapha dolomitica |
| Opegrapha saxicola var. decandollei Stizenb. | = Opegrapha calcarea |
| Opegrapha saxicola var. gyrocarpa (Flot.) Stizenb. | = Opegrapha gyrocarpa |
| Opegrapha saxicola var. persoonii auct. | = Opegrapha rupestris {LF} |
| Opegrapha scripta (L.) Ach. | = Graphis scripta |
| Opegrapha semicincta Zahlbr. ? | = Opegrapha rupestris {LF} |
| Opegrapha siderella Ach. | = Opegrapha rufescens |
| Opegrapha siderella auct. brit. p.p. | = Opegrapha vulgata |
| Opegrapha subsiderella (Nyl.) Arnold | = Opegrapha niveoatra |
| Opegrapha sulcata Moug. & Nestl. ex DC. | = Graphis elegans |
| Opegrapha turneri Leight. | = Opegrapha herbarum |
| Opegrapha varia f. pulicaris auct. | = Opegrapha varia |
| Opegrapha varia var. pulicaris auct. | = Opegrapha varia |
| Opegrapha venosa sensu Sm. (1812), non Pers. (1811) | = Enterographa elaborata |
| Opegrapha venosa auct. brit. p.p. | = Enterographa crassa |
| Opegrapha viridis f. taxicola (Leight.) Cromb. | = Opegrapha prosodea |
| Opegrapha vulgaris auct. (sphalm.) | = Opegrapha vulgata |
| Opegrapha vulgata var. siderella auct. brit. | = Opegrapha niveoatra |
| Opegrapha vulgata var. subsiderella Nyl. | = Opegrapha niveoatra |
| Opegrapha xanthodes Nyl. | = Opegrapha saxigena |
| Opegrapha “sp. A” sensu D. Hawksw. (1983) | = Opegrapha brevis {LF} |
| Opegrapha “sp. B” sensu D. Hawksw. (1983) | = Opegrapha thelotrematis {LF} |
| Ophiobolus peltigerae (Mont.) Sacc. | = Neolamya peltigerae {LF} |
| Ophioparma lapponica (Räsänen) Hafellner & R.W. Rogers | = British status of this species doubtful |
| Orbicula tartaricola (Nyl.) Cooke | = Roselliniopsis tartaricola {LF} |
| Orphniospora atrata (Sm.) Poelt | = Orphniospora moriopsis |
| Orphniospora atrata var. brunnea (A.L. Sm.) Poelt | = Orphniospora moriopsis var. brunnea |
| Oxneria coppinsii (S. Kondratyuk & Kärnefelt & Søchting) S. Kondratyuk & Kärnefelt nom. inval. | = ? Xanthoria ulophyllodes |
| Oxneria fulva (Hoffm.) S. Kondratyuk & Kärnefelt | = Xanthoria fulva |
| Oxneria ulophyllodes (Räsänen) S. Kondratyuk & Kärnefelt | = Xanthoria ulophyllodes |
P
| Lichen Name | Synonym |
|---|---|
| Pachyospora verrucosa (Ach.) A. Massal. | = Megaspora verrucosa |
| Pachyphiale cornea (Ach.) Poetsch | = Pachyphiale carneola |
| Pachyphiale corticola Lönnr. | = Pachyphiale fagicola |
| Pannaria carnosa (Dicks.) Leight. | = Massalongia carnosa |
| Pannaria cheilea Nyl., nom. inval. | = Fuscopannaria leucophaea |
| Pannaria ignobilis Anzi | = Fuscopannaria ignobilis |
| Pannaria lanuginosa sensu Szatala, non (Ach.) Körb. | = Pannaria conoplea |
| Pannaria leucophaea (Vahl) P.M. Jørg. | = Fuscopannaria leucophaea |
| Pannaria mediterranea Tav. | = Fuscopannaria mediterranea |
| Pannaria microphylla auct. | = Fuscopannaria leucophaea |
| Pannaria microphylla var. cheilea (Mudd) A.L. Sm. | = Fuscopannaria leucophaea |
| Pannaria muscorum (Gray) Delise ex Duby | = Massalongia carnosa |
| Pannaria nebulosa (Hoffm.) Nyl. | = Moelleropsis nebulosa |
| Pannaria nigra (Huds.) Nyl. | = Placynthium nigrum |
| Pannaria nigra subsp. psotina (Nyl.) Cromb. | = Placynthium nigrum |
| Pannaria nigra f. triseptata Nyl. | = Placynthium nigrum |
| Pannaria nigra subsp. triseptata (Nyl.) Nyl. ex Cromb. | = Placynthium nigrum |
| Pannaria pezizoides (Weber) Trevis. | = Protopannaria pezizoides |
| Pannaria pityrea auct. | = Pannaria conoplea |
| Pannaria plumbea (Lightf.) Bory | = Degelia plumbea |
| Pannaria plumbea f. myriocarpa auct. brit. p.p. | = Degelia atlantica |
| Pannaria plumbea f. myriocarpa auct. brit. p.p. | = Degelia plumbea |
| Pannaria praetermissa Nyl. | = Fuscopannaria praetermissa |
| Pannaria psotina (Nyl.) Leight. | = Placynthium nigrum |
| Pannaria rubiginosa var. conoplea (Ach.) Körb. | = Pannaria conoplea |
| Pannaria sampaiana Tav. | = Fuscopannaria sampaiana |
| Pannaria saubinetii (Mont.) Nyl. | = Fuscopannaria saubinetii (Mont.) P.M. Jørg.; incorrectly reported from the British Isles |
| Pannaria triptophylla (Ach.) Nyl. | = Parmeliella triptophylla |
| Pannularia carnosa (Dicks.) Cromb. | = Massalongia carnosa |
| Pannularia microphylla auct. | = Fuscopannaria leucophaea |
| Pannularia microphylla f. cheilea (Mudd) Nyl. ex Cromb. | = Fuscopannaria leucophaea |
| Pannularia nigra (Huds) Stizenb. | = Placynthium nigrum |
| Pannularia nigra subsp. psotina (Nyl.) Cromb. | = Placynthium nigrum |
| Pannularia perfurfurea Nyl. | = Placynthiella icmalea |
| Pannularia triptophylla (Ach.) Stizenb. | = Parmeliella triptophylla |
| Pannularia triseptata (Nyl.) Nyl. ex Cromb. | = Placynthium nigrum |
| Parmelia acetabulum (Neck.) Duby | = Pleurosticta acetabulum |
| Parmelia affinis auct. brit. 19th C | = Pannaria rubiginosa |
| Parmelia afrorevoluta Krog & Swinscow | = incorrectly reported from the British Isles |
| Parmelia alpicola Th. Fr. | = Allantoparmelia alpicola |
| Parmelia ambigua (Wulfen) Ach. | = Parmeliopsis ambigua |
| Parmelia aquila (Ach.) Ach. | = Anaptychia runcinata |
| Parmelia arnoldii Du Rietz | = Parmotrema arnoldii |
| Parmelia aspera A. Massal. | = Melanelia exasperata |
| Parmelia borreri Turner | = Punctelia borreri |
| Parmelia britannica D. Hawksw. & P. James | = Hypotrachyna britannica |
| Parmelia caperata (L.) Ach. | = Flavoparmelia caperata |
| Parmelia carporrhizans Taylor | = Parmelina quercina |
| Parmelia cetrarioides (Duby) Nyl. | = Cetrelia olivetorum s. lat. |
| Parmelia cetrata auct. brit. | = Parmotrema reticulatum |
| Parmelia claudelii (Harm.) Vain. | = Parmotrema stuppeum (Taylor) Hale; incorrectly reported from the British Isles |
| Parmelia clementei (Sm.) Turner | = Physcia clementei |
| Parmelia clementiana Ach. | = Physcia clementei |
| Parmelia columnaris Taylor | = Physcia clementei |
| Parmelia coniocarpa Laurer | = Parmotrema perlatum |
| Parmelia conspersa (Ehrh. ex Ach.) Ach. | = Xanthoparmelia conspersa |
| Parmelia conspersa var. stenophylla auct. brit. | = Xanthoparmelia conspersa |
| Parmelia corniculata (Lightf.) A.L. Sm. | = Cornicularia normoerica |
| Parmelia corrugata (Sm.) Ach. | = Pleurosticta acetabulum |
| Parmelia crinita | = Parmotrema crinitum |
| Parmelia cycloselis (Ach.) Ach. | = Phaeophyscia orbicularis |
| Parmelia delisei (Duby) Nyl. | = Neofuscelia delisei |
| Parmelia delisei var. isidiascens (Nyl. ex Cromb.) Zahlbr. | = Neofuscelia delisei |
| Parmelia dilatata auct. brit. | = Parmotrema robustum |
| Parmelia disjuncta Erichsen | = Melanelia disjuncta |
| Parmelia dissecta auct. brit. | = Parmelinopsis minarum |
| Parmelia dubia auct. p.p. | = Punctelia subrudecta |
| Parmelia dubia auct. p.p. | = Punctelia borreri |
| Parmelia dubia auct. p.p. | = Punctelia reddenda |
| Parmelia dubia auct. p.p. | = Punctelia ulophylla |
| Parmelia elegantula (Zahlbr.) Szatala | = Melanelia elegantula |
| Parmelia encausta (Sm.) Ach. | = Brodoa intestiniformis |
| Parmelia endochlora Leight. | = Hypotrachyna endochlora |
| Parmelia exasperata De Not. | = Melanelia exasperata |
| Parmelia exasperatula Nyl. | = Melanelia exasperatula |
| Parmelia fahluensis auct. p.p. | = Melanelia commixta |
| Parmelia fahluensis auct. p.p. | = Melanelia hepatizon |
| Parmelia fuliginosa (Fr. ex Duby) Nyl., non (Dicks.) Schaer. | = Melanelia fuliginosa subsp. fuliginosa |
| Parmelia fuliginosa f. denudata Cromb. | = Melanelia fuliginosa subsp. glabratula |
| Parmelia fuliginosa var. laetevirens (Flot. ex Körb.) Nyl. | = Melanelia fuliginosa subsp. glabratula |
| Parmelia furfuracea (L.) Ach. | = Pseudevernia furfuracea |
| Parmelia glabra (Schaer.) Nyl. | = Melanelia glabra (Schaer.) Essl.; incorrectly reported from the British Isles |
| Parmelia glabratula subsp. fuliginosa (Fr. ex Duby) J.R. Laundon | = Melanelia fuliginosa subsp. fuliginosa |
| Parmelia glabratula var. fuliginosa (Fr. ex Duby) Grummann | = Melanelia fuliginosa subsp. fuliginosa |
| Parmelia glabratula (Lamy) Nyl. subsp. glabratula | = Melanelia fuliginosa subsp. glabratula |
| Parmelia glomellifera (Nyl.) Nyl. | = Neofuscelia verruculifera |
| Parmelia glomulifera (Lightf.) Ach. | = Lobaria amplissima |
| Parmelia herbacea (Huds.) Ach. | = Lobaria virens |
| Parmelia horrescens Taylor | = Parmelinopsis horrescens |
| Parmelia hyperopta Ach. | = Parmeliopsis hyperopta |
| Parmelia incurva (Pers.) Fr. | = Arctoparmelia incurva |
| Parmelia intestiniformis (Vill.) Ach. | = Brodoa intestiniformis |
| Parmelia isidioides Borrer | = Rinodina isidioides |
| Parmelia isidiotyla auct. brit. | = Neofuscelia verruculifera |
| Parmelia isidiotyla Nyl., non auct. brit. | = Neofuscelia loxodes |
| Parmelia laciniatula (H. Olivier) Zahlbr. | = Melanelia laciniatula |
| Parmelia laevigata (Sm.) Ach. | = Hypotrachyna laevigata |
| Parmelia lanata var. reticulata (Wulfen) Cromb. | = Pseudephebe pubescens |
| Parmelia lanata var. subciliata Nyl. | = Pseudephebe pubescens |
| Parmelia lanata var. parmelioides Cromb. | = Pseudephebe pubescens |
| Parmelia loxodes Nyl. | = Neofuscelia loxodes |
| Parmelia luteonotata J. Steiner | = Neofuscelia luteonotata |
| Parmelia maxima Hue | = Parmotrema stuppeum (Taylor) Hale; incorrectly reported from the British Isles |
| Parmelia mcmillana Stirt. | = Hypotrachyna endochlora |
| Parmelia minarum Vain. | = Parmelinopsis minarum |
| Parmelia minuscula auct. brit., non (Nyl. ex Arnold) Nyl. | = Pseudephebe pubescens |
| Parmelia mougeotii Schaer. ex D. Dietr. | = Xanthoparmelia mougeotii |
| Parmelia multifida auct. | = Arctoparmelia incurva |
| Parmelia negata Nyl. | = incorrectly reported from the British Isles |
| Parmelia olivacea auct. brit. p.min.p. | = Melanelia septentrionalis |
| Parmelia olivacea auct. brit. p.max.p. | = Melanelia fuliginosa subsp. glabratula |
| Parmelia olivacea auct. brit. p.min.p. | = Neofuscelia pulla s.lat. |
| Parmelia olivacea var. aspera (A. Massal.) ?? | = Melanelia exasperata |
| Parmelia olivacea var. dendritica (Pers.) Leight. | = Neofuscelia pulla |
| Parmelia olivacea var. fuliginosa Fr. ex Duby | = Melanelia fuliginosa subsp. fuliginosa |
| Parmelia olivacea var. furfuracea sensu Mudd | = Melanelia fuliginosa s. lat. |
| Parmelia olivacea var. prolixa Ach. | = Neofuscelia pulla |
| Parmelia olivaria sensu Th. Fr. | = Cetrelia olivetorum s. lat. |
| Parmelia olivetorum Nyl. | = Cetrelia olivetorum |
| Parmelia omphalodes subsp. discordans (Nyl.) Skult | = Parmelia discordans |
| Parmelia omphalodes var. discordans (Nyl.) H. Magn. | = Parmelia discordans |
| Parmelia omphalodes var. panniformis Ach. | = Parmelia omphalodes subsp. pinnatifida (Kurok.) Skult; ? incorrectly reported from the British Isles |
| Parmelia panniformis (Nyl.) Vain. | = Melanelia panniformis (Nyl.) Essl.; incorrectly reported from the British Isles |
| Parmelia pastillifera (Harm.) R. Schub. & Klem. | = Parmelina pastillifera |
| Parmelia perforata auct. brit. p.p. | = Parmotrema crinitum |
| Parmelia perforata auct. brit. p.p. | = Parmotrema reticulatum |
| Parmelia perlata Ach. | = Parmotrema perlatum |
| Parmelia perlata var. ciliata sensu Cromb. (1870) | = Parmotrema crinitum |
| Parmelia pertusa Schaer. | = Menegazzia terebrata |
| Parmelia physodes (L.) Ach. | = Hypogymnia physodes |
| Parmelia physodes var. labrosa Ach. | = Hypogymnia physodes |
| Parmelia physodes var. platyphylla Ach. | = Hypogymnia physodes |
| Parmelia physodes var. tubulosa Schaer. | = Hypogymnia tubulosa |
| Parmelia physodes f. vittatoides Mereschk. | = Hypogymnia physodes |
| Parmelia pityrea (Ach.) Ach. | = Physconia grisea |
| Parmelia plumbea var. affinis (Dicks.) Taylor | = Pannaria rubiginosa |
| Parmelia proboscidea Taylor | = Parmotrema crinitum |
| Parmelia prolixa (Ach.) Carroll | = Neofuscelia pulla |
| Parmelia prolixa var. isidiascens Nyl. ex Cromb. | = Neofuscelia delisei |
| Parmelia prolixa var. isidiotyla auct. brit. | = Neofuscelia verruculifera |
| Parmelia prolixa var. isidiotyla (Nyl.) Dalle Torre & Sarnth, non auct. brit. | = Neofuscelia loxodes |
| Parmelia protomatrae Gyeln. | = Xanthoparmelia protomatrae |
| Parmelia pubescens (L.) Vain. | = Pseudephebe pubescens |
| Parmelia pubescens var. reticulata (Wulfen) A.L. Sm. | = Pseudephebe pubescens |
| Parmelia pulla Ach. | = Neofuscelia pulla |
| Parmelia pulverulenta auct. | = Physconia distorta |
| Parmelia quercina (Willd.) Vain. | = Parmelina quercina |
| Parmelia reddenda Stirt. | = Punctelia reddenda |
| Parmelia reticulata Taylor | = Parmotrema reticulatum |
| Parmelia revoluta Flörke | = Hypotrachyna revoluta |
| Parmelia revoluta var. concentrica (Arnold) Cromb. | = Hypotrachyna revoluta |
| Parmelia revoluta var. erratica (Linds.) Zahlbr. | = Hypotrachyna revoluta |
| Parmelia revoluta var. rugosa Cromb. | = Hypotrachyna taylorensis |
| Parmelia robusta Degel. | = Parmotrema robustum |
| Parmelia rugosa Taylor, non Fr. | = Hypotrachyna taylorensis |
| Parmelia saxatilis var. aizonii Delise ex Duby | = Parmelia saxatilis |
| Parmelia saxatilis var. furfuracea (Schaer.) Linds. | = Parmelia saxatilis |
| Parmelia saxatilis var. leucochroa Wallr. | = Parmelia sulcata |
| Parmelia saxatilis var. panniformis auct. brit. | = Parmelia saxatilis |
| Parmelia saxicola var. areolata Leight. nom. inval. | = Lecanora muralis |
| Parmelia scortea (Ach.) Ach. | = Parmelina tiliacea |
| Parmelia septentrionalis (Lynge) Ahti | = Melanelia septentrionalis |
| Parmelia sinuosa (Sm.) Ach. | = Hypotrachyna sinuosa |
| Parmelia sinuosa var. excentrica Mudd | = Hypotrachyna revoluta |
| Parmelia soredians Nyl. | = Flavoparmelia soredians |
| Parmelia sorediata auct. brit. | = Melanelia disjuncta |
| Parmelia sorediosa auct. brit. | = Melanelia disjuncta |
| Parmelia speciosa auct. brit. | = Heterodermia japonica |
| Parmelia stellaris (L.) Ach. | = Physcia stellaris |
| Parmelia stellaris auct. brit. p.p. | = Physcia aipolia |
| Parmelia stenophylla auct. brit., non (Ach.) Heugel | = Xanthoparmelia conspersa |
| Parmelia stuppea Taylor | = Parmotrema stuppeum (Taylor) Hale; incorrectly reported from the British Isles |
| Parmelia stygia (L.) Ach. | = Melanelia stygia |
| Parmelia subargentifera Nyl. | = Melanelia subargentifera |
| Parmelia subarnoldii auct. brit., non Abbayes | = Parmotrema arnoldii |
| Parmelia subaurifera Nyl. | = Melanelia subaurifera |
| Parmelia subrudecta Nyl. | = Punctelia subrudecta |
| #Parmelia subrudecta auct. brit. p.p. pre-2000 | = Punctelia ulophylla |
| Parmelia substygia auct. brit. | = Melanelia disjuncta |
| Parmelia taractica auct. sed non auct. brit. | = Xanthoparmelia somloensis (Gyeln.) Hale; incorrectly reported from the British Isles |
| Parmelia taractica auct. brit. | = Xanthoparmelia conspersa |
| Parmelia taractica Kremp. | = Xanthoparmelia taractica (Kremp.) Hale; incorrectly reported from the British Isles |
| Parmelia taylorensis M.E. Mitch. | = Hypotrachyna taylorensis |
| Parmelia tiliacea (Hoffm.) Ach. | = Parmelina tiliacea |
| #Parmelia tiliacea auct. p.p. | = Parmelina quercina |
| Parmelia tiliacea var. carporrhizans (Taylor) Flagey | = Parmelina quercina |
| Parmelia tiliacea subsp. carporrhizans (Taylor) Nyl. | = Parmelina quercina |
| Parmelia tiliacea var. pastillifera (Harm.) Grummann | = Parmelina pastillifera |
| Parmelia tiliacea var. scortea (Ach.) Mérat | = Parmelina tiliacea |
| Parmelia tinctina Maheu & A. Gillet | = Xanthoparmelia tinctina |
| Parmelia tubulosa (Schaer.) Bitter | = Hypogymnia tubulosa |
| Parmelia ulophylla (Ach.) F. Wilson | = Punctelia ulophylla |
| Parmelia verruculifera Nyl. | = Neofuscelia verruculifera |
| Parmelia virella (Ach.) Ach. | = Phaeophyscia orbicularis |
| Parmelia vitatta auct. brit. pre-1998 | = Hypogymnia physodes |
| Parmelia vitatta (Ach.) Nyl., non auct. brit. pre-1998 | = Hypogymnia vittata |
| Parmelia xanthomyela Nyl. | = Parmelia endochlora |
| Parmeliella atlantica Degel. | = Degelia atlantica |
| Parmeliella corallinoides auct. | = Parmeliella triptophylla |
| Parmeliella jamesii Ahlner & P.M. Jørg. | = Parmeliella parvula |
| Parmeliella lepidiota (Sommerf.) Vain. | = Fuscopannaria praetermissa |
| Parmeliella melantera (Stirt.) A.L. Sm. | = Placynthium pluriseptatum |
| Parmeliella microphylla (Sw. ex Westr.) Müll. Arg. | = Fuscopannaria leucophaea |
| Parmeliella microphylla var. cheilea (Mudd) A.L. Sm. | = Fuscopannaria leucophaea |
| Parmeliella perfurfuracea (Nyl.) Zahlbr. | = Placynthiella icmalea |
| Parmeliella plumbea (Lightf.) Vain. | = Degelia plumbea |
| Parmeliella plumbea var. myriocarpa auct. brit. p.p. | = Degelia atlantica |
| Parmeliella plumbea var. myriocarpa auct. brit. p.p. | = Degelia plumbea |
| Parmeliella praetermissa (Nyl.) P. James | = Fuscopannaria praetermissa |
| Parmeliella saubinetii (Mont.) Zahlbr. | = Fuscopannaria saubinetii (Mont.) P.M. Jørg.; incorrectly reported from the British Isles |
| Parmeliopsis aleurites (Ach.) Nyl. | = Imshaugia aleurites |
| Parmelinopsis britannica (D. Hawksw. & P. James) Elix | = Hypotrachyna britannica |
| Parmentaria chilensis auct. europ. | = Pyrenula hibernica |
| Parmotrema chinense auct. | = Parmotrema perlatum |
| Peltidea aphthosa auct. brit. p.p. | = Peltigera britannica |
| Peltidea aphthosa auct. brit. p.p. | = Peltigera leucophlebia |
| Peltidea aphthosa (L.) Ach. | = Peltigera aphthosa (L.) Willd.; incorrectly reported from the British Isles. |
| Peltidea aphthosa var. leucophlebia Nyl. | = Peltigera leucophlebia |
| Peltidea canina (L.) Ach. | = Peltigera canina |
| Peltidea canina auct. p.p. | = Peltigera membranacea |
| Peltidea polydactyla auct. p.max.p. | = Peltigera hymenina |
| Peltidea spuria (Ach.) Ach. | = Peltigera didactyla |
| Peltidea venosa (L.) Ach. | = Peltigera venosa |
| Peltigera aphthosa (L.) Willd. | = incorrectly reported from the British Isles. |
| Peltigera aphthosa auct. brit. p.p. | = Peltigera britannica |
| Peltigera aphthosa auct. brit. p.p. | = Peltigera leucophlebia |
| Peltigera apthosa f. britannica (Gyeln.) Zahlbr. | = Peltigera britannica |
| Peltigera aphthosa var. leucophlebia Nyl. | = Peltigera leucophlebia |
| Peltigera aphthosa var. variolosa (A. Massal.) J.W. Thomson | = Peltigera leucophlebia |
| #Peltigera canina auct. brit. p.max.p. pre-1982 | = Peltigera membranacea |
| Peltigera canina var. erumpens (Taylor) Hue | = Peltigera didactyla |
| Peltigera canina var. pusilla Fr. | = Peltigera didactyla |
| Peltigera canina var. rufescens (Weiss) Hook. | = Peltigera rufescens |
| Peltigera lactucifolia auct., non (With.) J.R. Laundon | = Peltigera hymenina |
| #Peltigera polydactyla (Neck.) Hoffm. [orth. var.] | = Peltigera polydactylon |
| #Peltigera polydactyla auct. brit. p.p. pre-1982 | = Peltigera hymenina |
| #Peltigera polydactyla auct. brit. p.p. pre-1982 | = Peltigera neckeri |
| Peltigera polydactyla var. crassoides Gyeln. | = Peltigera hymenina |
| Peltigera polydactyloides auct. | = Peltigera neckeri |
| Peltigera rufescens var. lepidophora auct. brit. pre-1965 | = Peltigera praetextata |
| Peltigera rufescens var. praetextata (Flörke ex Sommerf.) Nyl. | = Peltigera praetextata |
| Peltigera scutata auct. | = Peltigera collina |
| Peltigera spuria (Ach.) DC. | = Peltigera didactyla |
| Peltigera variolosa (A. Massal.) Gyeln. | = Peltigera leucophlebia |
| Peltigera variolosa f. britannica Gyeln. | = Peltigera britannica |
| Pertusaria alpina Hepp ex Ahles | = ? Pertusaria leioplaca |
| Pertusaria amara var. flotowiana (Flörke) Erichsen | = Pertusaria amara |
| Pertusaria amara f. isidiata Harm. | = Pertusaria amara |
| Pertusaria areolata auct. brit. | = Pertusaria corallina |
| Pertusaria bracyspora auct. brit., non Erichsen | = Pertusaria monogona |
| Pertusaria brachyspora Erichsen | = incorrectly reported from the British Isles |
| Pertusaria carneopallida (Nyl.) Anzi ex Nyl. | = incorrectly reported from the British Isles |
| Pertusaria ceuthocarpa (Sm.) Turner & Borrer | = Pertusaria pseudocorallina |
| Pertusaria ceuthocarpa f. microstictica sensu Cromb. | = Pertusaria pseudocorallina |
| Pertusaria ceuthocarpa var. variolosa Mudd | = Pertusaria monogona |
| Pertusaria ceuthocarpoides Zahlbr. | = Pertusaria pseudocorallina |
| Pertusaria citrinescens Coppins & P. James ad int. | = Coccotrema citrinescens |
| Pertusara coccodes var. isidiifera (Erichsen) Almb. | = Pertusaria coccodes |
| Pertusaria colliculosa Körb. | = Pertusaria pertusa |
| Pertusaria communis DC. | = Pertusaria pertusa |
| Pertusaria concreta Nyl. | = Pertusaria pseudocorallina |
| Pertusaria constricta Erichsen | = incorrectly reported from the British Isles |
| Pertusaria crassa (DC.) Hook. | = Enterographa crassa |
| Pertusaria dealbata auct. | = Pertusaria aspergilla |
| Pertusaria dealbata f. corallina (L.) Cromb. | = Pertusaria corallina |
| Pertusaria dealbescens auct. | = Pertusaria aspergilla |
| Pertusaria discoidea (Pers.) Malme | = Pertusaria albescens var. albescens |
| Pertusaria erumpens Erichsen | = incorrectly reported from the British Isles |
| Pertusaria faginea auct. | = Pertusaria amara |
| Pertusaria fallax auct. brit. p.p. | = Pertusaria hymenea |
| Pertusaria fallax auct. brit. p.p. | = Pertusaria pertusa |
| Pertusaria fallax var. variolosa sensu Mudd | = Pertusaria flavida |
| Pertusaria fastigiata (Turner & Borrer) Leight. | = Pertusaria polythecia |
| Pertusaria freyi Erichsen | = Megaspora verrucosa |
| Pertusaria gallica de Lesd. | = Pertusaria pluripuncta |
| Pertusaria globulifera (Turner) A. Massal. | = Pertusaria albescens var. albescens |
| Pertusaria glomulifera Leight. | = identity uncertain |
| Pertusaria gyrocheila Nyl. | = Ochrolechia tartarea |
| Pertusaria havaiiensis Erichsen | = incorrectly reported from the British Isles |
| Pertusaria henrici auct. p.p. | = Pertusaria albescens var. corallina |
| Pertusaria hibernica Erichsen | = Pertusaria hemisphaerica |
| Pertusaria inopinata Erichsen | = incorrectly reported from the British Isles |
| Pertusaria inquinata (Ach.) Th. Fr. | = Pertusaria chiodectonoides |
| Pertusaria inquinata f. nolens (Nyl.) Boistel | = Pertusaria chiodectonoides |
| Pertusaria isidiifera Erichsen | = Pertusaria coronata |
| Pertusaria isidioides (Borrer) Hook. | = Thelotrema isidioides |
| Pertusaria jurana Erichsen | = incorrectly reported from the British Isles |
| Pertusaria kasandjeffii Szatala | = incorrectly reported from the British Isles |
| Pertusaria leioterella Erichsen | = Pertusaria pertusa |
| Pertusaria leptospora Nitschke ex J. Lahm | = Pertusaria multipuncta |
| #Pertusaria leucosora auct. brit. pre-1999 | = Pertusaria aspergilla |
| Pertusaria leucostoma A. Massal. | = Pertusaria leioplaca |
| Pertusaria lutescens (Hoffm.) Lamy (1878), non (Eschw.) Kremp. (1874) | = Pertusaria flavida |
| Pertusaria melaleuca (Sm. & Sowerby) Duby | = Pertusaria pustulata |
| Pertusaria microstictica sensu Erichsen | = Pertusaria pseudocorallina |
| Pertusaria multipuncta f. constellata (Taylor) Zahlbr. | = Pertusaria polythecia |
| Pertusaria multipuncta f. ophthalmiza sensu James (1965) | = Pertusaria ophthalmiza |
| Pertusaria multipuncta var. ophthalmiza Nyl. | = Pertusaria ophthalmiza |
| Pertusaria nolens Nyl. | = Pertusaria chiodectonoides |
| Pertusaria panyrga auct. brit., non (Ach.) Massal. | = Pertusaria hutchinsiae |
| Pertusaria pertusa var. rupestris (DC.) Dalla Torre & Sarnth. | = Pertusaria pertusa |
| Pertusaria pertusa f. rupestre auct. brit. (sphalm.) | = Pertusaria pertusa |
| Pertusaria pulvinata Erichsen | = Pertusaria amara f. pulvinata |
| Pertusaria pustulata auct. brit. p.p. | = Pertusaria leioplaca |
| Pertusaria reducta Stirt. | = Phlyctis argena |
| Pertusaria rupicola auct. brit., non (Fr.) Harm. | = Pertusaria hymenea |
| Pertusaria scutellata Hue | = Pertusaria albescens var. albescens |
| Pertusaria sublactea Leight. | = Pertusaria polythecia |
| Pertusaria spilomanthodes Nyl. ex W. Johnson | = Pertusaria lactescens |
| Pertusaria sulphurea auct. brit. p.max.p. | = Pertusaria flavicans |
| Pertusaria syncarpa var. corallina (L.) Mudd | = Pertusaria corallina |
| Pertusaria trochiscea auct. brit. | = Ochrolechia xanthostoma |
| Pertusaria urceolaria Nyl. | = Pertusaria lactescens |
| #Pertusaria velata auct. brit. p.p. [sorediate taxon] | = Pertusaria hemisphaerica |
| Pertusaria velata f. aspergilla sensu Cromb. | = Pertusaria hemisphaerica |
| Pertusaria westringii (Ach.) Leight. | = Pertusaria pseudocorallina |
| Pertusaria wulfenii DC. | = Pertusaria hymenea |
| Pertusaria xanthostoma (Sommerf.) Fr. | = Ochrolechia xanthostoma |
| Phacopsis oxyspora (Tul.) Triebel & Rambold | = Nesolechia oxyspora {LF} |
| Phacotrum aeruginosum (Turner ex Sm.) Gray | = Chaenotheca trichialis |
| Phacotrum cantherellum sensu Gray, non (Ach.) Gray | = Sclerophora pallida |
| Phacotrum chrysocephalum (Turner ex Ach. ) Gray | = Chaenotheca chrysocephala |
| Phacotrum claviculare sensu Gray, non (Ach.) Gray | = Calicium quercinum (q.v.) |
| Phacotrum curtum (Turner & Borrer ex Sm.) Gray | = Calicium abietinum (q.v.) |
| Phacotrum ferrugineum (Turner ex Sm.) Gray | = Chaenotheca ferruginea |
| Phacotrum hispidulum (Ach.) Gray | = Chaenotheca hispidula |
| Phacotrum hyperellum (Ach.) Gray | = Calicium viride |
| Phacotrum microcephalum (Sm.) Gray | = Sphinctrina anglica {LF} |
| Phacotrum sphaerocephalum sensu Gray | = Calicium salicinum |
| Phacotrum trabinellum sensu Gray, non (Ach.) Gray | = Chaenotheca chrysocephala |
| #Phaeographis inusta auct. brit. p.max.p. pre- c. 1978 | = Phaeographis smithii |
| Phaeographis ramificans (Nyl.) Lettau | = Graphis elegans |
| Phaeophyscia orbicularis var. hueana (Harm.) Clauzade & Cl. Roux | = Phaeophyscia orbicularis |
| Phaeospora caninae (W. Phillips & Plowr.) Vouaux | = Pyrenidium actinellum {LF} |
| Phaeospora epicallopisma (Wedd.) Arnold | = Weddellomyces epicallopisma {LF} |
| Phaeospora hetairizans (Leight.) Arnold | = Pyrenidium hetairizans {LF} |
| Phaeospora parasitica var. dzieduszyckii (Boberski) Kernst. | = Polycoccum dzieduszyckii {LF} |
| Phaeospora parmeliarum (Plowr. & W. Phillips) Vouaux | = Cucurbidothis pithyophila var. cembrae (Rehm) L. Holm {F} |
| Phaeospora peripherica (Taylor) Arnold | = Weddellomyces periphericus {LF} |
| Phaeospora supersparsa Arnold | = Lasiosphaeriopsis supersparsa {LF} |
| Phaeospora vesicularia (Linds.) Arnold | = incorrectly reported from the British Isles |
| Phaeosporis phaeosperma (Arnold) Clauzade, Diederich & Cl. Roux | = Verrucaria phaeosperma {?LF} |
| Pharcidia aggregata (Mudd) Vouaux | = Stigmidium aggregatum {LF} |
| Pharcidia allogena (Nyl.) Sac. & D. Sacc. | = Arthopyrenia allogena {LF} |
| Pharcidia consociata (Nyl.) A.L. Sm. | = of uncertain application {?LF} |
| Pharcidia crombei (Mudd) Sacc. & D. Sacc. | = Thamnogalla crombei {LF} |
| Pharcidia dispersa (J. Lahm ex Körb.) G. Winter | = Zwackhiomyces dispersus {LF} |
| Pharcidia dubiella (Nyl.) A.L. Sm. | = Sphaerulina dubiella {LF} |
| Pharcidia ephebes Henssen | = Stigmidium ephebes {LF} |
| Pharcidia epicymatica (Wallr.) G. Winter | = Stigmidium congestum {LF} |
| Pharcidia gyrophorarum (Arnold) Zopf | = Stigmidium gyrophorarum {LF} |
| Pharcidia microspila (Körb.) G. Winter | = Stigmidium microspilum {LF} |
| Pharcidia punctilla (Arnold) G. Winter | = Stigmidium punctillum {LF} |
| Pharcidia superposita (Nyl.) Sacc. & D. Sacc. | = Stigmidium superpositum {LF} |
| Pharcidia triphractoides (Nyl.) A.L. Sm. | = ? Phaeospora parasitica {LF} |
| Phialopsis livida Mudd | = Megalaria laureri |
| Phoma abietinae Vouaux | = Lecanactis abietina |
| Phoma lecanorae Vouaux | = ? Opegrapha sp. |
| Phoma lichenis Pass. | = ? Physconia distorta |
| Phoma parmeliarum (H. Olivier) Vouaux | = Vouauxiomyces sp. {LF} |
| Phoma ramalinae Nordin | = Vouauxiomyces ramalinae {LF} |
| Phoma truncata de Lesd. | = Vouauxiomyces truncatus {LF} |
| Phoma uncialicola (Zopf) Vouaux | = Bachmanniomyces uncialicola {LF} |
| Phoma usneae Vouaux | = Pseudoseptoria usneae {LF} |
| Phragmonaevia fuckelii Rehm | = Corticifraga fuckelii {LF} |
| Phragmonaevia peltigerae (Nyl.) Rehm | = Corticifraga peltigerae {LF} |
| Phragmothyrium cetrariicola (Nyl.) Keissl. | = Lichenopeltella cetrariicola {LF} |
| Phyllosticta cytospora Vouaux | = Phoma cytospora {LF} |
| Phyllosticta uncialicola Zopf | = Bachmanniomyces uncialicola {LF} |
| Physalaspora psoromoides (Borrer) G. Winter | = Catapyrenium psoromoides |
| Physcia adglutinata (Flörke) Nyl. | = Hyperphyscia adglutinata |
| Physcia aipolia var. cercidia (Ach.) Nyl. | = Physcia aipolia |
| Physcia albinea (Ach.) Nyl. | = incorrectly reported from the British Isles |
| Physcia aquila (Ach.) Nyl. | = Anaptychia runcinata |
| Physcia astroidea auct. | = Physcia clementei |
| Physcia caesia f. teretiuscula (Ach.) Cromb. | = Physcia dubia |
| Physcia caesia var. teretiuscula (Ach.) Nyl. | = Physcia dubia |
| Physcia chrysophthalma (L.) DC. | = Teloschistes chrysophthalmus |
| Physcia ciliaris (L.) DC. | = Anaptychia ciliaris |
| Physcia ciliaris f. melanosticta (Ach.) H. Olivier | = Anaptychia ciliaris subsp. mamillata |
| Physcia ciliata auct. brit. | = Phaeophyscia orbicularis |
| Physcia elaeina auct. | = Hyperphyscia adglutinata |
| Physcia enteroxantha Nyl. | = Physconia enteroxantha |
| Physcia erosa Zwackh | = Physcia tribacia |
| Physcia farrea auct. | = Physconia perisidiosa |
| Physcia fusca (Huds.) A.L. Sm. | = Anaptychia runcinata |
| Physcia grisea (Lam.) Zahlbr. | = Physconia grisea |
| Physcia grisea auct. p.p. | = Physconia enteroxantha |
| Physcia grisea auct. p.p. | = Physconia perisidiosa |
| Physcia grisea f. enteroxanthella (Harm.) Erichsen | = Physconia enteroxantha |
| Physcia grisea var. hillmannii (Lynge) Nádv. | = Physconia grisea |
| Physcia grisea f. hillmannii Lynge | = Physconia grisea |
| Physcia hispida auct. brit. p.p. | = Physcia adscendens |
| Physcia hispida auct. brit. p.p. | = Physcia tenella |
| Physcia hispida auct. brit. p.p. | = Physcia leptalea |
| Physcia hispida f. subobscura (Nyl.) A.L. Sm. | = Physcia tenella |
| Physcia intricata (Desf.) Schaer. | = Tornabea scutellifera |
| Physcia labrata auct. brit. | = Phaeophyscia orbicularis |
| Physcia leucomela (L.) Mich. | = Heterodermia leucomela |
| Physcia lithotea auct. brit. | = Phaeophyscia orbicularis |
| Physcia lychnea auct. brit. | = Xanthoria candelaria s. lat. |
| Physcia melops Nyl. | = Physcia phaea (Tuck.) J.W. Thomson; incorrectly reported from the British Isles |
| Physcia muscigena (Ach.) Nyl. | = Physconia muscigena (Ach.) Poelt; incorrectly reported from the British Isles |
| Physcia nigricans (Flörke) Stizenb. | = Phaeophyscia nigricans |
| Physcia obscura (Ehrh. ex Humb.) Fürnr. | = Phaeophyscia orbicularis |
| Physcia obscura var. virella (Ach.) Leight. | = Phaeophyscia orbicularis |
| Physcia orbicularis (Neck.) Poetsch | = Phaeophyscia orbicularis |
| Physcia orbicularis var. ciliata auct. brit. | = Phaeophyscia orbicularis |
| Physcia orbicularis var. virella (Ach.) Dalla Torre & Sarnth. | = Phaeophyscia orbicularis |
| Physcia parietina (L.) De Not. | = Xanthoria parietina |
| Physcia parietina var. aureola f. congranulata Cromb. | = Xanthoria calcicola |
| Physcia parietina var. aureola auct. | = Xanthoria calcicola |
| Physcia parietina var. ectanea auct. brit. p.max.p. | = Xanthoria aureola |
| Physcia parietina f. lobulata auct. brit. | = Xanthoria polycarpa |
| Physcia parietina var. lychnea auct. brit. | = Xanthoria candelaria s. lat. |
| Physcia parietina var. polycarpa (Hoffm.) Mudd | = Xanthoria polycarpa |
| Physcia phaea auct. brit. | = Physcia aipolia |
| Physcia polycarpa (Hoffm.) Nyl. | = Xanthoria polycarpa |
| Physcia polycarpa f. lobulata auct. brit. | = Xanthoria polycarpa |
| Physcia pulverulenta auct. | = Physconia distorta |
| Physcia pulverulenta var. angustata (Hoffm.) Schaer. | = Physconia distorta |
| Physcia pulverulenta var. muscigena (Ach.) Nyl. | = Physconia muscigena (Ach.) Poelt; incorrectly reported from the British Isles |
| Physcia pulverulenta f. venusta auct. brit., non (Ach.) Leight. | = Physconia distorta |
| Physcia pulverulenta var. venusta auct. brit., non (Ach.) Nyl. | = Physconia distorta |
| Physcia pulverulenta subsp. venusta auct. brit., non (Ach.) Nyl. | = Physconia distorta |
| Physcia sciastra (Ach.) Du Rietz | = Phaeophyscia sciastra |
| Physcia sciastrella (Nyl.) Harm. | = Phaeophyscia nigricans |
| Physcia semipinnata (J.F. Gmel.) Moberg | = Physcia leptalea |
| #Physcia speciosa auct. brit. p.max.p. | = Heterodermia japonica |
| Physcia speciosa var. hypoleuca auct. brit. | = Heterodermia japonica |
| Physcia stellaris var. aipolia (Ehrh. ex Humb.) Nyl. | = Physcia aipolia |
| Physcia stellaris var. cercidia (Ach.) Th. Fr. | = Physcia aipolia |
| Physcia subalbinea Nyl. | = Physcia caesia |
| Physcia subdetersa Nyl. | = Physconia enteroxantha |
| Physcia subobscura (Nyl.) Nyl. | = Physcia tenella |
| Physcia tenella subsp. marina | = Physcia tenella |
| Physcia teretiuscula (Ach.) Lynge | = Physcia dubia |
| Physcia tremulicola Nyl. | = Phaeophyscia nigricans |
| Physcia ulothrix auct. brit. | = Phaeophyscia orbicularis |
| Physcia ulothrix var. virella (Ach.) Cromb. | = Phaeophyscia orbicularis |
| Physcia virella (Ach.) Flagey | = Phaeophyscia orbicularis |
| Physcia wainioi Räsänen | = Physcia caesia |
| Physciopsis adglutinata (Flörke) M. Choisy | = Hyperphyscia adglutinata |
| Physconia farrea auct. | = Physconia perisidiosa |
| Physconia pulverulacea Moberg | = Physconia distorta |
| Physconia pulverulenta auct. | = Physconia distorta |
| Physma chalazanellum (Nyl.) A.L. Sm. | = ? Lempholemma polyanthes |
| Physma chalazonodes (Nyl.) Arnold | = ? Lempholemma polyanthes |
| Physma confertum (Ach.) Nyl. | = Collema tenax |
| Physma polyanthes (Bernh.) Arnold | = Lempholemma polyanthes |
| Phytoconis ericetorum (Pers.:Fr.) Redhead & Kuyper | = Lichenomphalia umbellifera |
| Phytoconis velutina (Quél.) Redhead & Kuyper | = Lichenomphalia velutina |
| Phytoconis viridis (Ach.) Redhead & Kuyper | = Lichenomphalia hudsoniana |
| %Piccolia ochrophora (Nyl.) Hafellner | = Strangospora ochrophora |
| Pilophorus cereolus auct. brit. | = Pilophorus strumaticus |
| Pilophorus distans (Hult.) H. Magn. | = Pilophorus strumaticus |
| Placidiopsis cartilaginea (Nyl.) Vain. | = Placidiopsis custnani |
| Placidiopsis custanii (A. Massal.) Körb. [orth. error] | = Placidiopsis custnani |
| Placidiopsis custnanii (A. Massal.) Körb. [orth. error] | = Placidiopsis custnani |
| %Placidium boccanum (Servít) Breuss | = Catapyrenium boccanum |
| Placidium cartilagineum (Nyl.) Arnold | = Placidiopsis custnani |
| Placidium custnani A. Massal. | = Placidiopsis custnani |
| %Placidium lachneum (Ach.) de Lesd. | = Catapyrenium lachneum |
| %Placidium michelii A. Massal. | = Catapyrenium michelii |
| %Placidium pilosellum (Breuss) Breuss | = Catapyrenium pilosellum |
| %Placidium rufescens (Ach.) A. Massal. | = Catapyrenium rufescens |
| %Placidium squamulosum (Ach.) Breuss | = Catapyrenium squamulosum |
| Placodium albolutescens (Nyl.) A.L. Sm. | = Caloplaca teicholyta |
| Placodium atroflavum (Turner) A.L. Sm. | = Caloplaca atroflava |
| Placodium aurantiacum auct. p.p. | = Caloplaca flavorubescens |
| Placodium aurantiacum auct. p.p. | = Caloplaca flavovirescens |
| Placodium aurantiacum var. flavovirescens (Wulfen) Hepp | = Caloplaca flavovirescens |
| Placodium aurantiacum var. inalpinum (Ach.) H. Magn. | = Caloplaca flavovirescens |
| Placodium aurantiacum subsp. irrubescens (Nyl.) A.L. Sm. | = Caloplaca irrubescens |
| Placodium caesiorufum auct. | = Caloplaca ceracea |
| Placodium callopismum (Ach.) Mérat | = Caloplaca aurantia |
| Placodium callopismum var. brevilobatum (Nyl.) A.L. Sm. | = Caloplaca flavescens |
| Placodium callopismum var. plicatum (Wedd.) Leight. | = Caloplaca flavescens |
| Placodium callopismum f. thallincolum (Wedd.) Walt. Watson | = Caloplaca thallincola |
| Placodium cerinum (Hedw.) Nägeli ex Hepp | = Caloplaca cerina |
| Placodium cerinum var. chlorina (Flot.) Körb. | = Caloplaca chlorina |
| Placodium cerinum f. cyanopolium (Nyl.) A.L. Sm. | = Caloplaca chlorina |
| Placodium cerinum var. stillicidiorum (Vahl) Hepp | = Caloplaca cerina var. chloroluca |
| Placodium cerinellum (Nyl.) Vain. | = Caloplaca cerinella |
| Placodium chalybaeum (Fr.) Nägeli ex Hepp | = Caloplaca chalybaea |
| Placodium cirrochroum (Ach.) Rabenh. | = Caloplaca cirrochroa |
| Placodium cirrochroum var. obliterans (Nyl.) A.L. Sm. | = Caloplaca obliterans |
| Placodium citrinum (Hoffm.) Th. Fr. | = Caloplaca citrina |
| Placodium concilians (Nyl.) A.L. Sm. | = Caloplaca concilians |
| Placodium crenulatellum (Nyl.) A.L. Sm. | = Caloplaca crenulatella |
| Placodium daedaleum (Sm.) Hook. | = Pyxine sorediata (Ach.) Mont.; incorrectly reported from the British Isles |
| Placodium decipiens (Arnold) Leight. | = Caloplaca decipiens |
| Placodium dissidens Nyl. | = Xanthoria elegans |
| Placodium elegans (Link) DC. | = Xanthoria elegans |
| Placodium erythrocarpum auct. brit. | = Caloplaca teicholyta |
| Placodium ferrugineum (Huds.) Hepp | = Caloplaca ferruginea |
| Placodium ferrugineum auct. p.p. (saxicolous) | = Caloplaca crenularia |
| Placodium ferrugineum var. festivum (Ach.) A.L. Sm. | = Caloplaca crenularia |
| Placodium ferrugineum f. ferruginascens (Nyl.) A.L. Sm. | = Caloplaca arenaria |
| Placodium flavescens (Huds.) A.L. Sm. | = Caloplaca flavescens |
| Placodium fulgens (Sw.) DC. | = Fulgensia fulgens |
| Placodium fuscoatrum (Nyl.) A.L. Sm. | = Caloplaca aractina |
| Placodium granulosum (Müll. Arg.) Hepp | = Caloplaca granulosa |
| Placodium granulosum auct. p.p. | = Caloplaca verruculifera |
| Placodium haematites (Chaub. ex St.-Amans) A.L. Sm. | = Caloplaca haematites |
| Placodium incrustans (DC.) A.L. Sm. | = Protoblastenia incrustans |
| Placodium lallavei auct. brit., non (Clemente ex Ach.) Anzi | = Caloplaca teicholyta |
| Placodium lobulatum Flagey | = Caloplaca marina |
| Placodium luteoalbum (Turner) Nägeli ex Hepp | = Caloplaca luteoalba |
| Placodium medians Nyl. | = Candelariella medians |
| Placodium microphyllum sensu Hook. | = Parmeliella triptophylla |
| Placodium microthallinum (Wedd.) H. Olivier | = Caloplaca microthallina |
| Placodium miniatulum (Nyl.) H. Olivier | = Caloplaca arnoldii |
| Placodium murorum (Ach.) DC. | = Caloplaca saxicola |
| Placodium murorum f. arnoldii (Wedd.) A.L. Sm. | = Caloplaca arnoldii |
| Placodium nivale (Körb.) Tuck. | = Caloplaca nivalis |
| Placodium ochraceum (Schaer.) Anzi | = Caloplaca ochracea |
| Placodium phaeocarpellum (Nyl.) A.L. Sm. | = Caloplaca pollinii |
| Placodium phloginum (Ach.) A.L. Sm. | = Caloplaca phlogina |
| Placodium plumbeum (Lightf.) Hook. | = Degelia plumbea |
| Placodium pollinii (A. Massal.) A.L. Sm. | = Caloplaca pollinii |
| Placodium pusillum (A. Massal.) Anzi | = Caloplaca saxicola |
| Placodium pyraceum (Ach.) Anzi | = Caloplaca holocarpa |
| Placodium pyraceum var. holocarpum (Hoffm.) Anzi | = Caloplaca holocarpa |
| Placodium pyraceum var. lacteum (A. Massal.) A.L. Sm. | = Caloplaca lactea |
| Placodium pyraceum var. pyrithromum (Ach.) A.L. Sm. | = Caloplaca holocarpa |
| Placodium refellens (Nyl.) A.L. Sm. | = Caloplaca obscurella |
| Placodium rupestre (Scop.) Branth & Rostr. | = Protoblastenia rupestris |
| Placodium rupestre var. calvum (Dicks.) A.L. Sm. | = Protoblastenia calva |
| Placodium rupestre f. incrustans (DC.) A.L. Sm. | = Protoblastenia incrustans |
| Placodium scopulare (Nyl.) H. Olivier | = Caloplaca scopularis |
| Placodium tetrastichum (Nyl.) H. Olivier | = Caloplaca ochracea |
| Placodium turnerianum (Ach.) A.L. Sm. | = Caloplaca atroflava |
| Placodium variabile (Pers.) Hepp | = Caloplaca variabilis |
| lacodium variabile var. ecrustaceum (Nyl.) Nyl. | = Caloplaca alociza |
| Placodium vitellinulum auct. brit. | = several Caloplaca spp. with a yellow thallus |
| Placodium xantholytum (Nyl.) Nyl. | = Leproplaca xantholyta |
| #Placopsis gelida auct. brit. p.max.p. | = Placopsis lambii |
| Placynthium delicatulum (Th. Fr.) A.L. Sm. | = Arctomia delicatula |
| Placynthium delicatulum sensu A.L. Sm. p.p. | = Placynthium pluriseptatum |
| Placynthium dolichoterum auct. brit. | = Placynthium pluriseptatum |
| Placynthium filiforme (Garov.) M. Choisy | = incorrectly reported from the British Isles |
| Placynthium garovaglii (A. Massal.) Malme [orth. error] | = Placynthium garovaglioi |
| #Placynthium garovaglii auct. p.p. | = Collolechia caesia |
| Placynthium majus Harm. | = incorrectly reported from the British Isles |
| Placynthium nigrum f. agglomeratum Walt. Watson | = Placynthium nigrum |
| Placynthium nigrum f. caespiticium Wedd. | = Placynthium nigrum |
| Placynthium nigrum f. corallinodes (Hepp) Vain. | = Placynthium nigrum |
| Placynthium nigrum f. crustaceum Hepp | = Placynthium nigrum |
| Placynthium nigrum f. psotinum (Nyl.) Hue | = Placynthium nigrum |
| Placynthium nigrum f. triseptatum (Nyl.) Hue | = Placynthium nigrum |
| Platygramma dendritica (Ach.) G. Mey. | = Phaeographis dendritica |
| Platygramma elaborata Leight. | = Enterographa elaborata |
| Platygramma hutchinsiae Leight. | = Enterographa hutchinsiae |
| Platygrapha periclea auct. brit. | = ? Schismatomma graphidioides |
| Platygrapha rimata auct. brit. | = Schismatomma graphidioides |
| Platysma chlorophyllum (Willd.) Vain. | = Tuckermanopsis chlorophylla |
| Platysma diffusum auct. | = Imshaugia aleurites |
| Platysma fahluensis auct. p.p. | = Melanelia commixta |
| Platysma fahluensis auct. p.p. | = Melanelia hepatizon |
| Platysma glaucum (L.) Frege | = Platismatia glauca |
| Platysma hepatizon (Ach.) Vain. | = Melanelia hepatizon |
| Platysma juniperinum (L.) Frege | = Vulpicida juniperinus |
| Platysma lacunosum auct. brit. | = Platismatia norvegica |
| Platysma norvegicum (Lynge) Dahl | = Platismatia norvegica |
| Platysma pinastri (Scop.) Frege | = Vulpicida pinastri |
| Platysma polyschizum Nyl. | = Melanelia hepatizon |
| Platysma sepincolum (Ehrh.) Hoffm. | = Cetraria sepincola |
| Platysma triste (Weber) Nyl. | = Cornicularia normoerica |
| Plectocarpon sampaianae Diederich & Etayo | = Arthonia sampaianae {LF} |
| Pleospilis ascaridiella (Nyl.) D. Hawksw. | = Spirographa fusisporella {LF} |
| Pleospora addubitans (Stirt.) A.L. Sm. | = of uncertain application {?F} |
| Pleospora hookeri (Borrer) Keissl. | = Dacampia hookeri |
| Pleospora peripherica (Taylor) D. Hawksw. | = Weddellomyces periphericus {LF} |
| Polyblastia addubitans (Stirt.) Wheldon & A. Wilson | = of uncertain application {?F} |
| Polyblastia allobata (Stizenb.) Zschacke | = Agonimia allobata |
| Polyblastia armericola Walt. Watson | = Lauderlindsaya borreri {LF} |
| Polyblastia bryophila auct. brit., non Lönnr. | = Polyblastia cupularis |
| Polyblastia discrepans J. Lahm | = Merismatium discrepans (J. Lahm) Triebel {LF} |
| Polyblastia fuscoargillacea Anzi | = Polyblastia cupularis |
| Polyblastia gelatinosa (Ach.) Th. Fr. | = Agonimia gelatinosa |
| #Polyblastia gelatinosa auct. p.p. [most lowland records] | = Agonimia globulifera |
| Polyblastia henscheliana (Körb.) Lönnr. | = Polyblastia cruenta |
| Polyblastia hibernica (Nyl.) Arnold | = Pyrenula hibernica |
| Polyblastia intercedens (Nyl.) Lönnr. | = Polyblastia cupularisv |
| Polyblastia mortensis Walt. Watson | = ? Thelidium pyrenophorum |
| Polyblastia nigrata (Nyl.) Lönnr. | = Agonimia gelatinosa |
| Polyblastia nigritella (Nyl.) Arnold | = Merismatium nigritellum (Nyl.) Vouaux {LF} |
| Polyblastia peltophora (Stirt.) A.L. Sm. | = identity uncertain, type not traced |
| Polyblastia schraderi (Gray) A.L. Sm | = Polyblastia dermatodes |
| Polyblastia scotinospora (Nyl.) Hellb. | = Polyblastia melaspora |
| Polyblastia singularis (Kremp.) Arnold | = incorrectly reported from the British Isles |
| Polyblastia spurcella (Nyl. ex Shackleton & Hebden) A.L. Sm. | = Staurothele hymenogonia |
| Polyblastia subinumbrata (Nyl.) A.L. Sm. | = Polyblastia melaspora |
| Polyblastia subviridicans (Nyl.) A.L. Sm. | = Polyblastia terrestris |
| Polyblastia succedens Rehm ex Arnold | = Staurothele succedens |
| Polyblastia tristicula (Nyl.) Arnold | = Agonimia tristicula |
| Polyblastiopsis sericea (A. Massal.) Zahlbr. | = Julella sericea {F} |
| Polychidium muscorum auct. brit. (sphalm.) | = Polychidium muscicola |
| Polychidium spongiosum (Ach.) Gray | = Solorina spongiosa |
| Polychidium umhausense (Auersw.) Henssen | = Lobaria amplissima (blue-green phycotype) |
| Polychidium velutinum (Ach.) Gray | = Thermutis velutina |
| Polycoccum dannenbergii auct. brit. p.p. | = ? Peridothelia fuliguncta (Norman) D. Hawksw. {F} |
| Polycoccum dannenbergii auct. brit. p.p. | = ? Roselliniella atlantica {LF} |
| Polycoccum epicrassum (H. Olivier) R. Sant. | = Clypeococcum epicrassum {LF} |
| Polycoccum galligenum V?zda | = Polycoccum pulvinatum {LF} |
| Polycoccum gelidaria (Mudd) D. Hawksw. | = Roselliniopsis gelidaria {LF} |
| Polycoccum microsticticum (Mudd) Arnold [orth. error] | = Polycoccum microstictum {LF} |
| Polycoccum vermicularium (Linds.) D. Hawksw. | = incorrectly reported from the British Isles {LF} |
| Polysporina cyclospora auct. brit. (sphalm.) | = Polysporina cyclocarpa |
| Polysporina dubia (H. Magn.) V?zda | = Polysporina lapponica |
| Porina affinis auct. brit. p.p. | = Porina aenea |
| Porina affinis auct. brit. p.p. | = Strigula jamesii |
| Porina affinis (A. Massal.) Zahlbr. | = Strigula affinis (A. Massal.) R.C. Harris; incorrectly reported from the British Isles |
| #Porina atlantica auct. brit. p.p., non (Erichsen) P.M. Jørg. | = Porina effilata |
| Porina borreri var. leptospora (Nyl.) D.L. Hawksw. | = Porina leptospora |
| Porina carpinea (Pers. ex Ach.) Zahlbr. | = Porina aenea |
| Porina chlorotica var. carpinea (Pers. ex Ach.) Keissl. | = Porina aenea |
| Porina chlorotica var. linearis (Leight.) A.L. Sm. | = Porina linearis |
| Porina chlorotica var. persicina (Körb.) Zahlbr. | = Porina linearis |
| Porina epigaeoides (Nyl.) A.L. Sm. | = Porina mammillosa |
| Porina faginea (Schaer.) Arnold | = Strigula stigmatella |
| Porina furvescens (Nyl.) A.L. Sm. | = Porina mammillosa |
| Porina globosa (Taylor) A.L. Sm. | = Porina ahlesiana |
| Porina guaranitica auct. europ. p.p., non Malme | = Porina atlantica |
| Porina guaranitica auct. europ. p.p., non malme | = Porina effilata |
| Porina guentheri var. curnowii (A.L. Sm.) Swinscow | = Porina curnowii |
| Porina guentheri var. grandis (Körb.) Swinscow | = Porina grandis |
| Porina heterospora auct. europ. p.p., non (Fink) R.C. Harris | = Porina atlantica |
| Porina heterospora auct. europ. p.p., non (Fink) R.C. Harris | = Porina effilata |
| Porina humicolor (Nyl.) A.L. Sm. | = Porina mammillosa |
| Porina insiliens (Larbal.) A.L. Sm. | = Porina ahlesiana |
| Porina insularis (Larbal. ex Nyl.) A.L. Sm. | = Porina ahlesiana |
| Porina interseptula (Nyl.) A.L. Sm. | = Porina interjungens |
| Porina isidiata Kalb & Hafellner | = Porina atlantica |
| Porina lucens (Taylor) A.L. Sm. | = Porina guentheri var. lucens |
| Porina nucula auct. europ. p.p., non Ach. | = Porina atlantica |
| Porina nucula auct. europ. p.p., non Ach. | = Porina effilata |
| Porina olivacea auct. | = Porina borreri |
| Porina olivacea var. leptospora (Nyl.) Keissl. | = Porina leptospora |
| Porina rhodostoma auct. europ., non Müll. Arg. | = Porina atlantica |
| Porina septemseptata (Hepp ex Zwackh) Swinscow | = Porina ahlesiana |
| Porina succina (Leight.) A.L. Sm. | = Porina ahlesiana |
| Porina taylorii (Carroll ex Nyl.) Swinscow | = Strigula taylorii |
| Porina tenuifera (Nyl.) A.L. Sm. | = Porina chlorotica f. tenuifera (Nyl.) Swinscow |
| Porocyphus areolatus (Flot.) Körb. | = Porocyphus coccodes |
| Poroscyphus rehmicus (A. Massal.) Zahlbr. | = incorrectly reported from the British Isles |
| Poroscyphus rehmicus auct. brit. | = Pyrenopsis furfurea |
| Porpidia athroocarpa (Ach.) Hertel & Rambold | = Immersaria athroocarpa |
| Porpidia confluenta Fryday ined. | = Porpidia pacythallina |
| #Porpidia flavicunda auct. brit. p.max.p. | = Porpidia flavocruenta |
| Porpidia flavocaerulescens (Hornem.) Hertel & Schwab [nom. rejic. prop.] | = Porpidia flavicunda |
| Porpidia flavocaerulescens auct. [sorediate taxon] | = Porpidia melinodes |
| Porpidia glaucophaea (Körb.) Hertel & Knoph | = Porpidia rugosa |
| Porpidia grisea Gowan | = incorrectly reported from the British Isles |
| Porpidia musiva (Körb.) Hertel & Knoph | = Porpidia cinereoatra |
| Pronectria streimannii S.Y. Kondr., Coppins & D.J. Galloway | = Xenonectriella streimanii {LF} |
| Protoblastenia cinnabarina auct. brit. | = Pertusaria pupillaris and Schismatomma quercicola |
| Protoblastenia cinnabarina (Sommerf.) Räsänen | = Pyrrhospora cinnabarina (Sommerf.) M. Choisy; incorrectly reported from the British Isles |
| Protoblastenia fuscorubens (Nyl.) J. Steiner ex Räsänen | = Clauzadea monticola |
| Protoblastenia globulifica (Nyl.) Zahlbr. | = Protoblastenia cyclospora |
| Protoblastenia immersa (Hoffm.) J. Steiner | = Clauzadea immersa |
| Protoblastenia metzleri (Körb.) J. Steiner | = Clauzadea metzleri |
| Protoblastenia monticola (Ach.) J. Steiner | = Clauzadea monticola |
| Protoblastenia ochracea (Hepp) Zahlbr. | = Clauzadea monticola |
| Protoblastenia quernea (Dicks.) Clauzade | = Pyrrhospora quernea |
| Protoblastenia rupestris var. calva (Dicks.) J. Steiner | = Protoblastenia calva |
| Protoblastenia rupestris subsp. siebenhaariana (Körb.) A.L. Sm. | = Protoblastenia siebenhaariana |
| Protoparmelia picea auct. | = Protoparmelia memnonia |
| %Protoparmeliopsis achariana (A.L. Sm.) Moberg & R. Sant. | = Lecanora achariana |
| %Protoparmeliopsis muralis (Schreb.) M. Choisy | = Lecanora muralis |
| Pseudephebe pubescens f. subciliata (Nyl.) D. Hawksw. | = Pseudephebe pubescens |
| Pseudevernia olivetorina Zopf | = Pseudevernia furfuracea var. ceratea |
| Pseudocyphellaria mougeotiana var. aurigera (Delise) H. Magn. | = Pseudocyphellaria crocata |
| Pseudocyphellaria thouarsii (Delise) Degel. | = Pseudocyphellaria intricata; but many records pre-1978 are Pseudocyphellaria norvegica |
| Pseudocyphellaria thouarsii auct. brit. p.p. pre-1978 | = Pseudocyphellaria norvegica |
| Pseudolecidea chalybeioides (Nyl.) Clauzade & Cl. Roux | = Claurouxia chalybeioides |
| Pseudophyscia fusca (Huds.) Walt. Watson | = Anaptychia runcinata |
| Pseudophyscia speciosa auct. brit. p.max.p. | = Heterodermia japonica |
| Pseudophyscia speciosa var. hypoleuca auct. brit. | = Heterodermia japonica |
| Pseudosagedia aenea (Wallr.) Hafellner & Kalb | = Porina aenea |
| Pseudosagedia borreri (Trevis.) Hafellner & Kalb | = Porina borreri |
| Pseudosagedia byssophila (Körb. ex Hepp) Hafellner & Kalb | = Porina byssophila |
| Pseudosagedia chlorotica (Ach.) Hafellner & Kalb | = Porina chlorotica |
| Pseudosagedia curnowii (A.L. Sm.) Hafellner & Kalb | = Porina curnowii |
| Pseudosagedia ginzbergeri (Zahlbr.) Hafellner & Kalb | = Porina ginzbergeri |
| Pseudosagedia grandis (Körb.) Hafellner & Kalb | = Porina grandis |
| Pseudosagedia guentheri (Flot.) Hafellner & Kalb | = Porina guentheri |
| Pseudosagedia interjungens (Nyl.) Hafellner & Kalb | = Porina interjungens |
| Pseudosagedia linearis (Leight.) Hafellner & Kalb | = Porina linearis |
| Psora acutula (Nyl.) Walt. Watson | = Hypocenomyce caradocensis |
| Psora confertula (Stirt.) Stirt. | = Miriquidica leucophaea |
| Psora demissa (Ruström) Stein. | = Lecidoma demissum |
| Psora friesii (Ach.) Hellb. | = Hypocenomyce friesii |
| Psora glaucolepidea (Nyl.) Mudd | = Trapeliopsis glaucolepidea |
| Psora ostreata Hoffm. | = Hypocenomyce scalaris |
| Psora petri (Tuck.) Fink | = Psora lurida |
| Psora pissodes (Stirt.) Walt. Watson | = Clauzadeana macula |
| Psora prostratula (Stirt.) Walt. Watson | = Lecidea fuscoatra |
| Psora rhizobola (Nyl.) Arnold | = Acarospora rhizobola |
| Psora scalaris (Ach. ex Lilj.) Hook. | = Hypocenomyce scalaris |
| Psora testacea (Hoffm.) Ach. | = incorrectly reported from the British Isles |
| Psora wallrothii Flörke | = Trapeliopsis wallrothii |
| Psoroma muscorum Gray | = Massalongia carnosa |
| Psoroma polycarpum (Hoffm.) Gray. | = Xanthoria polycarpa |
| Psorotichia furfurella (Nyl.) Boistel | = Porocyphus coccodes |
| Psorotichia lugubris auct., non (Sommerf.) Arnold | = Schaereria cinereorufa |
| Psorotichia lugubris (Sommerf.) Arnold, non auct. brit. | = Ropalospora lugubris |
| Pterygium centrifugum Nyl. | = Placynthium filiforme (Garov.) M. Choisy; incorrectly reported from the British Isles |
| Pterygium filiforme (Garov.) M. Choisy | = Placynthium filiforme (Garov.) M. Choisy; incorrectly reported from the British Isles |
| Pterygium kenmorense (Holl ex Nyl.) A.L. Sm | = Porocyphus kenmorensis |
| Pterygium lismorense Nyl. | = Placynthium lismorense |
| Pterygium pannariellum Nyl. | = Placynthium pannariellum |
| Ptychographa flexella (Ach.) Coppins | = Elixia flexella |
| Pycnopsammina lobariae lobariae Etayo & Diederich | = Psammina lobariae {LF} |
| Pyreniococcus exoriens (Stirt.) Wheldon & A. Wilson | = Phaeospora exoriens {LF} |
| Pyrenocarpon flotowianum (Hepp) Trevis. | = ? Thrombium thelostomum |
| Pyrenocollema bryospilum (Nyl.) Coppins ex H.F. Fox | = Frigidopyrenia bryospila |
| Pyrenocollema saxicola (A. Massal.) Coppins | = Arthopyrenia saxicola |
| Pyrenodesmia chalybaea (Fr.) Körb. | = Caloplaca chalybaea |
| Pyrenodesmia variabilis (Pers.) Körb. | = Caloplaca variabilis |
| Pyrenodesmia variabilis var. ecrustacea (Nyl.) Walt. Watson | = Caloplaca alociza |
| Pyrenopeziza lettaui Grummann | = Unguiculariopsis lettaui {LF} |
| Pyrenopeziza thallophila (P. Karst.) Sacc. | = Unguiculariopsis thallophila {LF} |
| Pyrenopsidium furfureum (Nyl.) Forssell | = Pyrenopsis furfurea |
| Pyrenopsidium homoeopsis (Nyl.) Forssell | = Pyrenopsis furfurea |
| Pyrenopsis fuscatula Nyl. | = ? Pyrenopsis subareolata |
| Pyrenopsis granatina (Sommerf.) Nyl. | = Euopsis granatina |
| Pyrenopsis haemalea (Sommerf.) Norrl. | = Euopsis pulvinata |
| Pyrenopsis haematopsis [orth. error] auct. brit. non (Sommerf.) Th. Fr. | = ? Pyrenopsis subareolata |
| Pyrenopsis haematopis auct. brit. non (Sommerf.) Th. Fr. | = ? Pyrenopsis subareolata |
| Pyrenopsis haematopis (Sommerf.) Th. Fr., nom. illeg. | = Pyrenopsis haematina P.M. Jørg. & Henssen; incorrectly reported from the British Isles |
| Pyrenopsis homoeopsis Nyl. | = Pyrenopsis furfurea |
| Pyrenopsis imbrida (Taylor) Müll. Arg. | = ? a species of Porocyphus, Pterygiopsis or Pyrenopsis |
| Pyrenopsis multispora Coppins | = Pyrenopsis grumulifera |
| Pyrenopsis pulvinata (Schaer.) Th. Fr. | = Euopsis pulvinata |
| Pyrenopsis rhodosticta auct., non (Taylor) Müll. Arg. | = Pyrenopsis subareolata |
| Pyrenopsidium granuliforme Nyl. | = Cryptothele granuliformis (Nyl.) Henssen; incorrectly reported from the British Isles |
| Pyrenotea aphanes (Borrer) Leight. | = identity uncertain; probably an Opegrapha sp. |
| Pyrenotea aphanes auct. p.p. | = Lecanactis subabietina |
| Pyrenotea aphanes auct. p.p. | = Opegrapha vermicellifera |
| Pyrenotea hippocastani Leight. nom. nud. | = Opegrapha niveoatra |
| Pyrenotea leucocephala (Ach.) Leight. | = Lecanactis abietina |
| Pyrenotea lutea Leight. | = Opegrapha vulgata |
| Pyrenotea niveoatra (Borrer) Leight. | = Opegrapha niveoatra |
| Pyrenotea rudis (Borrer) Leight. | = a non-lichenized coelomycete |
| Pyrenotea rudis auct. p.max.p. | = Opegrapha vermicellifera |
| Pyrenothea | = see Pyrenotea |
| Pyrenula harrisii Hafellner & Kalb | = Pyrenula occidentalis |
| #Pyrenula laevigata auct. brit. p.p. pre-1980 | = Pyrenula occidentalis |
| Pyrenula neglecta auct. | = Pyrenula occidentalis |
| #Pyrenula nitida auct. brit. p.max.p. | = Pyrenula macrosporav |
| #Pyrenula nitida auct. brit. p.min.p. | = Pyrenula chlorospila |
| Pyrenula nitida var. nitidella (Flörke) Schaer. | = Pyrenula nitidella |
| Pyrenula nitida var. nitidella auct. brit. p.max.p. | = Pyrenula chlorospila |
| #Pyrenula nitidella auct. brit. p.max.p. | = Pyrenula chlorospila |
| Pyrenulella endococcoidea (Nyl.) Fink | = Phaeospora rimosicola {LF} |
