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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5011 | Lichen stellaris | L. | No | Physcia stellaris | 1119 | LC | ||||
| 5012 | Lichen stictoceros | Sm. (1804) | No | Evernia prunastri | 511 | LC | ||||
| 5013 | Lichen subfuscus | L. | No | Lecanora chlarotera s. lat. | 639 | See Lecanora subfusca | LC | |||
| 5014 | Lichen subulatus | L. | No | Cladonia subulata | 422 | LC | ||||
| 5015 | Lichen sulphureus | Hoffm. | No | Lecanora sulphurea | 783 | LC | ||||
| 5016 | Lichen tartareus | L. | No | Ochrolechia tartarea | 928 | LC | ||||
| 5017 | Lichen terrestris | Sm. (1807) | No | Thrombium epigaeum | 1414 | LC NS | ||||
| 5018 | Lichen tessellatus | Sm. | No | Verrucaria sp. | Verrucaria sp. | |||||
| 5019 | Lichen thelostomus | (Ach. ex J. Harriman) Sm. (1810) | No | Pyrenocarpon thelostomum | 1813 | DD NR | ||||
| 5020 | Lichen tigillaris | Ach. | No | Calicium tigillare | 476 | NT NR Sc | ||||
| 5021 | Lichen torrefactus | Lightf. | No | Umbilicaria torrefacta | 1455 | LC | ||||
| 5022 | Lichen trabinellus | sensu Sm., non (Ach.) Sm. | No | Chaenotheca phaeocephala | 347 | CR B NR P Wa | ||||
| 5023 | Lichen tricolor | With. | No | ? Opegrapha sp. or Hysterium pulicare Pers. {F} | ||||||
| 5024 | Lichen tuberculosus | Sm. (1807), non Hoffm. (1784) | No | Circinaria tuberculosa | 1851 | Ex | ||||
| 5025 | Lichen tumidulus | Sm. | No | Porpidinia tumidula | 1429 | Ex | ||||
| 5026 | Lichen turneri | Sm. | No | Ochrolechia turneri | 929 | LC | ||||
| 5027 | Lichen uncialis | auct. brit. p.m.p. | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 5028 | Lichen uncialis | L. | No | Cladonia uncialis subsp. uncialis | 1594 | NT NS Sc | ||||
| 5029 | Lichen velleus | sensu Huds., non L. | No | Umbilicaria vellea | Umbilicaria vellea (L.) Hoffm., incorrectly reported from the British Isles | |||||
| 5030 | Lichen venosus | L. | No | Peltigera venosa | 1054 | VU C1 NS P Eng Sc Wa | ||||
| 5031 | Lichen ventosus | L. | No | Ophioparma ventosa | 556 | LC | ||||
| 5032 | Lichen vernalis | L. (1768) | No | Biatora vernalis | 791 | LC NS | ||||
| 5033 | Lichen vernalis | sensu With. | No | Bacidia rubella | 164 | LC | ||||
| 5034 | Lichen verrucosus | Huds. (1778) | No | Lobarina scrobiculata | 858 | LC Sc L IR | ||||
| 5035 | Lichen verrucosus | Huds. (1762) | No | Pertusaria pertusa | 1087 | LC | ||||
| 5036 | Lichen verrucosus | With. | No | Umbilicaria torrefacta | 1455 | LC | ||||
| 5037 | Lichen verruculosus | Sm. | No | Buellia aethalea | 200 | LC | ||||
| 5038 | Lichen virellus | Ach. | No | Phaeophyscia orbicularis | 1107 | LC | ||||
| 5039 | Lichen virens | With. (1776) | No | Ricasolia virens | 856 | LC Sc L IR | ||||
| 5040 | Lichen vitellinus | Hoffm. | No | Candelariella vitellina f. vitellina | 298 | LC |