For more information see the Supplementary Notes for the Taxon Dictionary, which explains the names and synonyms, and these Instructions on how to use the online Taxon Dictionary which includes details of the Conservation Evaluation codes.
| Count | Name | Authority | Is Current Name? | Current Taxon Name | Synonyms | BLS Number | Comments | Conservation Evaluation | Group | Account & Map |
|---|---|---|---|---|---|---|---|---|---|---|
| 1231 | Buellia violaceofusca | G. Thor & Muhr (1991) | Yes | Buellia violaceofusca | 1745 | NT NR P Eng Sc IR | Buellia violaceofusca | |||
| 1232 | Buellia wahlenbergii | (Ach.) Sheard (1964) | No | Catolechia wahlenbergii | 325 | VU D1 NR Sc S8 | ||||
| 1233 | Buelliella physciicola | Poelt & Hafellner (1979) | Yes | Buelliella physciicola | 2022 | LC NS | LF | Buelliella physciicola | ||
| 1234 | Bunodophoron melanocarpum | (Sw.) Wedin (1995) | Yes | Bunodophoron melanocarpum | Sphaerophorus melanocarpus | 1334 | LC | Bunodophoron melanocarpum | ||
| 1235 | Burgellopsis nivea | Diederich & Lawrey (2014) | Yes | Burgellopsis nivea | 2643 | considered to be faculatively lichenicolous | NE | LF | ||
| 1236 | Burgoa angulosa | Diederich, Lawrey & Etayo (2007) | Yes | Burgoa angulosa | 2644 | considered to be faculatively lichenicolous | NE | LF | Burgoa angulosa | |
| 1237 | Burgoa moriformis | Diederich, Ertz & Coppins (2017) | Yes | Burgoa moriformis | 2824 | facutatively lichenicolous | NE NR | LF | ||
| 1238 | Burgoa splendens | Diederich & Coppins (2007) | Yes | Burgoa splendens | 2645 | considered to be faculatively lichenicolous | NE | LF | Burgoa splendens | |
| 1239 | Byssoloma diederichii | Sérus. (1998) | Yes | Byssoloma diederichii | 2497 | LC NR | Byssoloma diederichii | |||
| 1240 | Byssoloma leucoblepharum | (Nyl.) Vain. (1926) | Yes | Byssoloma leucoblepharum | 1858 | Most if not all British records are referable to B. maderense | NT NR | Byssoloma leucoblepharum | ||
| 1241 | Byssoloma llimonae | Sérus., Gómex-Bolea, Longán & Lücking (2002) | Yes | Byssoloma llimonae | Fellhanera christiansenii auct. brit. | 2472 | NE NR | Byssoloma llimonae | ||
| 1242 | Byssoloma maderense | Breuss (2014) | Yes | Byssoloma maderense | Byssoloma leucoblepharum auct. p.p. | 2791 | Most British records of B. leucoblepharum probably belong here | NE NR | ||
| 1243 | Byssoloma marginatum | (Arnold) Sérus. (1992) | Yes | Byssoloma marginatum | 1557 | LC NS | Byssoloma marginatum | |||
| 1244 | Byssoloma rotuliforme | (Müll. Arg.) R. Sant.. (1952) | No | Byssoloma subdiscordans | 221 | NT NR | ||||
| 1245 | Byssoloma subdiscordans | (Nyl.) P. James (1971) | Yes | Byssoloma subdiscordans | Byssoloma rotuliforme | 221 | NT NR | Byssoloma subdiscordans | ||
| 1246 | Byssus botryoides | L. (1753) | No | Lichenomphalia ericetorum | 931 | LC | ||||
| 1247 | Byssus candelaris | L. (1753) | No | Chrysothrix candelaris | 354 | LC | ||||
| 1248 | Byssus incana | L. (1753) | No | Lepraria incana | 820 | |||||
| 1249 | Caeruleum heppii | (Nägeli ex Körb.) K. Knudsen & Arcadia (2012) | Yes | Caeruleum heppii | Acarospora heppii; Myriospora heppii | 13 | LC NS | Caeruleum heppii | ||
| 1250 | Calicium abietinum | auct. brit. p.p. | No | Calicium glaucellum | 225 | name or specific epithet valid but has been misused in the past | LC | |||
| 1251 | Calicium abietinum | Pers. (1797) | Yes | Calicium abietinum | 222 | Most records refer to C. glaucellum | DD ? | |||
| 1252 | Calicium abietinum | No | 1980 | BLS number no longer used | Calicium abietinum | |||||
| 1253 | Calicium aciculare | auct. brit., | No | Chaenotheca hispidula | 345 | LC NS | ||||
| 1254 | Calicium adspersum | Pers. (1798) | Yes | Calicium adspersum | Calicium roscidum | 223 | CR D NR P Eng Wa | Calicium adspersum | ||
| 1255 | Calicium aeruginosum | auct. p.p. | No | Chaenotheca stemonea | 348 | LC NS | ||||
| 1256 | Calicium aeruginosum | Turner ex Sm. | No | Chaenotheca trichialis | 349 | LC | ||||
| 1257 | Calicium aeruginosum subsp. caerulescens | Turner & Borrer | No | Chaenotheca trichialis | 349 | LC | ||||
| 1258 | Calicium amylocaule | Lettau | No | Calicium lenticulare | 229 | LC NS Sc IR | ||||
| 1259 | Calicium arenarium | (Hampe ex A. Massal.) Hampe ex Körb. | No | Microcalicium arenarium | 1951 | LC NR | LF | |||
| 1260 | Calicium brunneolum | Ach. (1816) | No | Chaenotheca brunneola | 341 | LC |