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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4711 | Leptorhaphis laricis | (J. Lahm) M.B. Aguirre (1991) | Yes | Leptorhaphis laricis | 2660 | NE NR | Leptorhaphis laricis | |||
| 4712 | Leptorhaphis maggiana | (A. Massal.) Körb. (1865) | Yes | Leptorhaphis maggiana | 1537 | LC NS | F | Leptorhaphis maggiana | ||
| 4713 | Leptosillia slaptonensis | (P.F. Cannon) Voglmayr, M.B. Aguirre & Jaklitsch (2019) | Yes | Leptosillia slaptonensis | Cresporhaphis ulmi | 2869 | on corky bark of Ulmus minor twigs | NE NR | F | Leptosillia slaptonensis |
| 4714 | Leptosillia wienkampii | (J. Lahm ex Hazsl.) Voglmayr & Jaklitsch (2019) | Yes | Leptosillia wienkampii | Cresporhaphis weinkampii | 1284 | LC NR | Leptosillia wienkampii | ||
| 4715 | Leptosphaeria baeomycearia | (Linds.) Sacc. & Trotter | No | ? Pyrenidium actinellum {LF} | LF | |||||
| 4716 | Leptosphaeria caninae | (W. Phillips & Plowr.) Sacc. | No | Pyrenidium actinellum | 2179 | LC NS | LF | |||
| 4717 | Leptosphaeria clarki | |||||||||
| 4718 | Leptosphaeria clarkii | D. Hawksw. (1980) | Yes | Leptosphaeria clarkii | 2081 | NE NR | LF | Leptosphaeria clarkii | ||
| 4719 | Leptosphaeria leucomelaria | (Mudd) Vouaux | No | ? Pyrenidium actinellum {LF} | LF | |||||
| 4720 | Leptosphaeria leucomelaria | (Mudd) Vouaux (1913) | Yes | Leptosphaeria leucomelaria | 2082 | NE ? | LF | |||
| 4721 | Leptosphaeria neottizans | (Leight.) Zopf | No | Pyrenidium actinellum | 2179 | LC NS | LF | |||
| 4722 | Leptosphaeria oligospora | (Vain.) Sacc. & D. Sacc. | No | Pyrenidium actinellum | 2179 | LC NS | LF | |||
| 4723 | Leptosphaeria pycnostigma | auct. brit. | No | Pyrenidium actinellum | 2179 | LC NS | LF | |||
| 4724 | Leptosphaeria ramalinae | (Roberge ex Desm.) Sacc. (1883) | No | Didymocyrtis ramalinae | 2587 | NE NR | LF | |||
| 4725 | Leptosphaeria rivana | (De Not.) Sacc. | No | Pyrenidium actinellum | 2179 | LC NS | LF | |||
| 4726 | Leptosphaerulina peltigerae | (Fuckel) Riedl (1969) | Yes | Leptosphaerulina peltigerae | 2083 | NE NR | LF | Leptosphaerulina peltigerae | ||
| 4727 | Leptotrema monosporum | auct. brit., non (Nyl.) Müll. Arg. | No | Thelotrema macrosporum | 1411 | LC NS Sc IR | ||||
| 4728 | Letharia arenaria | auct. brit. | No | Evernia prunastri | 511 | LC | ||||
| 4729 | Lettauia cladoniicola | D. Hawksw. & R. Sant. (1990) | No | Cryptodiscus cladoniicola | 2084 | NE NR | LF | |||
| 4730 | Leucocarpia biatorella | (Arnold) Vězda (1969) | No | Psoroglaena biatorella | 1774 | DD NR Sc | ||||
| 4731 | Leucocarpopsis devensis | G. Salisb. (1975) | No | Verrucaria devensis | 850 | NE NR | ||||
| 4732 | Leucodecton isidioides | (Borrer) Lücking & Breuss (2012) | Yes | Leucodecton isidioides | Thelotrema isidioides | 1409 | NE (Ireland only) | Leucodecton isidioides | ||
| 4733 | Leucodermia leucomelos | (L.) Kalb (2015) | No | Heterodermia leucomelos | 558 | EN C2 NR P Eng Wa S8 IR | ||||
| 4734 | Leucogyrophana lichenicola | Thorn, Malloch & Ginns (1998) | No | Penttilamyces lichenicola | 2627 | NE NR | LF | |||
| 4735 | Libertiella malmedyensis | Speg. & Roum. (1880) | Yes | Libertiella malmedyensis | 2085 | NE ? | LF | Libertiella malmedyensis | ||
| 4736 | Libertiella peltigerae | (Lib. ex Cooke) Keissl. | No | Libertiella malmedyensis | 2085 | NE ? | LF | |||
| 4737 | Lichen abietinus | sensu Sm. (1807), non Ach. | No | Cresponea premnea | 605 | LC Sc IR | ||||
| 4738 | Lichen abietinus | Ach. | No | Lecanactis abietina | 592 | LC | ||||
| 4739 | Lichen acicularis | sensu Sm., non Ach. | No | Chaenotheca hispidula | 345 | LC NS | ||||
| 4740 | Lichen aculeatus | Schreb. | No | Cetraria aculeata | 430 | LC |