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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4501 | Leightoniomyces phillipsii | (Berk. & Leight.) D. Hawksw. & B. Sutton (1977) | Yes | Leightoniomyces phillipsii | 2080 | lichenicolous on Thrombium epigaeum | NE NR | LF | Leightoniomyces phillipsii | |
| 4502 | Leimonis erratica | (Körb.) R.C. Harris & Lendemer (2009) | Yes | Leimonis erratica | Lecidea erratica; Micarea erratica | 719 | LC | Leimonis erratica | ||
| 4503 | Leimonis lynceola | (Th. Fr.) Aptroot (2017) | Yes | Leimonis lynceola | Micarea excipulata; Micarea lynceola | 1775 | LC NR | Leimonis lynceola | ||
| 4504 | Leiophloea fallax | (Nyl.) Reidl (1970) | No | Arthopyrenia analepta | 1540 | LC | F | |||
| 4505 | Leiorreuma lyellii | (Sm.) Staiger | No | Phaeographis lyellii | 1102 | currently a synonym but may be adopted as the correct name in the future | NT NS IR | |||
| 4506 | Lemmopsis arnoldiana | (Hepp) Zahlbr. (1906) | Yes | Lemmopsis arnoldiana | 807 | NT NR Sc | Lemmopsis arnoldiana | |||
| 4507 | Lemmopsis leptogiella | (Nyl.) A.L. Sm. | No | Porocyphus leptogiella | 808 | NT NR Sc | ||||
| 4508 | Lemmopsis oblongans | (Nyl. ex Cromb.) A.L. Sm. (1918) | Yes | Lemmopsis oblongans | 809 | DD E IR | Lemmopsis oblongans | |||
| 4509 | Lempholema isidioides | (Nyl. ex Arnold) H. Magn. | No | incorrectly reported from the British Isles | ||||||
| 4510 | Lempholemma albonigrum | H. Magn. | No | Lempholemma cladodes | 814 | NT NR Sc | ||||
| 4511 | Lempholemma botryosum | (A. Massal.) Zahlbr. (1924) | Yes | Lempholemma botryosum | 810 | LC NS | Lempholemma botryosum | |||
| 4512 | Lempholemma chalazanellum | (Nyl.) Zahlbr. (1924) | Yes | Lempholemma chalazanellum | 811 | sometimes considered a synonym of L. polyanthes | LC NS | Lempholemma chalazanellum | ||
| 4513 | Lempholemma chalazanodes | (Nyl.) Zahlbr. (1924) | Yes | Lempholemma chalazanodes | 812 | sometimes considered a synonym of L. polyanthes | NE | Lempholemma chalazanodes | ||
| 4514 | Lempholemma chalazanum | (Ach.) B. de Lesd. (1910) | Yes | Lempholemma chalazanum | 813 | DD NS | Lempholemma chalazanum | |||
| 4515 | Lempholemma cladodes | (Tuck.) Zahlbr. (1924) | Yes | Lempholemma cladodes | 814 | NT NR Sc | Lempholemma cladodes | |||
| 4516 | Lempholemma confertum | (Ach.) Zahlbr. | No | ? Enchylium tenax | ||||||
| 4517 | Lempholemma fennicum | (Räsänen) Degel. | No | Lempholemma intricatum | 815 | NT NR Sc | ||||
| 4518 | Lempholemma intricatum | (Arnold) Zahlbr. (1924) | Yes | Lempholemma intricatum | 815 | NT NR Sc | Lempholemma intricatum | |||
| 4519 | Lempholemma isidioides | No | 816 | BLS number no longer used | ||||||
| 4520 | Lempholemma myriococcum | (Ach.) Th. Fr. | No | Lempholemma polyanthes | 817 | LC NS | ||||
| 4521 | Lempholemma polyanthes | (Bernh.) Malme (1918) | Yes | Lempholemma polyanthes | Lempholemma myriococcum | 817 | LC NS | Lempholemma polyanthes | ||
| 4522 | Lempholemma radiatum | (Sommerf.) Henssen (1968) | Yes | Lempholemma radiatum | Thyrea radiata | 818 | NT NR Sc | Lempholemma radiatum | ||
| 4523 | Lendemeriella lucifuga | (G. Thor) S.Y. Kondr. (2020) | No | Caloplaca lucifuga | 1642 | VU C, D1 NR P Eng Sc Wa | ||||
| 4524 | Lendemeriella nivalis | (Körb.) S.Y. Kondr. (2020) | No | Caloplaca nivalis | 269 | CR B, D NR S Sc S8 | ||||
| 4525 | Lepidoma demissum | (Rutstr.) M. Choisy (1950) | No | Lecidoma demissum | 806 | LC NS | ||||
| 4526 | Lepidoma scalare | (Ach. ex Lilj.) Gray | No | Hypocenomyce scalaris | 578 | LC | ||||
| 4527 | Lepidoma thriptophyllum | (Ach.) Gray (1821) | No | Parmeliella thriptophylla | 1032 | LC Sc L IR | ||||
| 4528 | Lepidoma triptophyllum | (Ach.) Gray (1821) orthogr. error. | No | Parmeliella thriptophylla | 1032 | LC Sc L IR | ||||
| 4529 | Lepra albescens var. albescens | (Huds.) Hafellner (2016) | Yes | Lepra albescens var. albescens | Pertusaria albescens var. albescens; Pertusaria discoidea; Pertusaria globulifera | 1056 | LC | Lepra albescens var. albescens | ||
| 4530 | Lepra albescens var. corallina | auct. | Yes | Lepra albescens var. corallina | Pertusaria albescens var. corallina | 1057 | combination not yet formally made | LC | Lepra albescens var. corallina |