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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 5701 | Ochrolechia laevigata | (Räsänen) Verseghy (1962) | Yes | Ochrolechia laevigata | 2599 | NE | Ochrolechia laevigata | |||
| 5702 | Ochrolechia lapuënsis | (Vain.) Räsänen | No | Ochrolechia frigida f. lapuensis | 748 | LC NR | ||||
| 5703 | Ochrolechia lapuënsis | (Vain.) Räsänen | No | Ochrolechia frigida f. lapuensis | 748 | orth. var. | LC NR | |||
| 5704 | Ochrolechia mahluensis | Räsänen (1947) | Yes | Ochrolechia mahluensis | Ochrolechia androgyna auct. p.p. | 2600 | NE | Ochrolechia mahluensis | ||
| 5705 | Ochrolechia microstictoides | Räsänen (1936) | Yes | Ochrolechia microstictoides | Ochrolechia turneri auct. p.p. | 1781 | LC | Ochrolechia microstictoides | ||
| 5706 | Ochrolechia pallescens | auct. brit. p.p. | No | Ochrolechia parella | 926 | LC | ||||
| 5707 | Ochrolechia pallescens | auct. brit. p.p. | No | Ochrolechia szatalaensis | 1494 | LC NS Sc IR | ||||
| 5708 | Ochrolechia pallescens | No | 925 | BLS number no longer used | ||||||
| 5709 | Ochrolechia parella | (L.) A. Massal. (1852) | Yes | Ochrolechia parella | Lecanora parella Ochrolechia pallescens auct. |
926 | LC | Ochrolechia parella | ||
| 5710 | Ochrolechia parella var. turneri | (Sm.) B. de Lesd. | No | Ochrolechia turneri | 929 | LC | ||||
| 5711 | Ochrolechia pseudotartarea | (Vain.) Verseghy (1962) | No | Ochrolechia szatalaensis | 1494 | LC NS Sc IR | ||||
| 5712 | Ochrolechia subviridis | (Høeg) Erichsen (1930) | Yes | Ochrolechia subviridis | Ochrolechia yasudae auct. | 927 | LC | Ochrolechia subviridis | ||
| 5713 | Ochrolechia szatalaensis | Verseghy (1958) | Yes | Ochrolechia szatalaensis | Ochrolechia pallescens auct. p.p. | 1494 | LC NS Sc IR | Ochrolechia szatalaënsis | ||
| 5714 | Ochrolechia szatalaënsis | Verseghy (1958) | No | Ochrolechia szatalaensis | 1494 | orth. var. | LC NS Sc IR | |||
| 5715 | Ochrolechia tartarea | (L.) A. Massal. (1852) | Yes | Ochrolechia tartarea | Lecanora tartarea | 928 | LC | Ochrolechia tartarea | ||
| 5716 | Ochrolechia tartarea var. pycnidiifera | Verseghy | No | Ochrolechia tartarea | 928 | LC | ||||
| 5717 | Ochrolechia turneri s. lat. | s. lat. | Yes | Ochrolechia turneri s. lat. | 929 | LC | Ochrolechia turneri s. lat. | |||
| 5718 | Ochrolechia turneri s. str. | (Sm.) Hasselrot s. str. (1945) | Yes | Ochrolechia turneri s. str. | 2362 | Ochrolechia turneri s. str. | ||||
| 5719 | Ochrolechia upsaliensis | (L.) A. Massal. | No | incorrectly reported from the British Isles | ||||||
| 5720 | Ochrolechia xanthostoma | (Sommerf.) K. Schmitz & Lumbsch (1994) | Yes | Ochrolechia xanthostoma | Aspicilia poriniformis Pertusaria trochiscea auct. brit. Pertusaria xanthostoma |
1097 | LC NS | Ochrolechia xanthostoma | ||
| 5721 | Ochrolechia yasudae | auct. brit. | No | Ochrolechia subviridis | 927 | LC | ||||
| 5722 | Odontotrema firmatum | Nyl. | No | Exarmidium hemisphaericum | Exarmidium hemisphaericum (Fr.) Aptroot | F | ||||
| 5723 | Odontotrema minus | auct. brit | No | Exarmidium hemisphaericum | Exarmidium hemisphaericum (Fr.) Aptroot | F | ||||
| 5724 | Odontotrema pertusariae | Etayo, Diederich & Coppins (2002) | No | Sphaeropezia pertusariae | 2376 | NE NR | LF | |||
| 5725 | Olegblumia demissa | (Flot. ex Körb.) S.Y. Kondr., Lőkös, Jung Kim, A.S. Kondr., S.O. Oh & Hur (2020) | Yes | Olegblumia demissa | Caloplaca demissa | 2593 | NE NR | Olegblumia demissa | ||
| 5726 | Omphalina alpina | (Britzelm.) Bresinsky & Stangl | No | Lichenomphalia alpina | 935 | LC | ||||
| 5727 | Omphalina cupulatoides | P.D. Orton (1977) | No | Arrhenia cupulatoides | 2908 | NE NR | LF | |||
| 5728 | Omphalina ericetorum | (Pers.) M. Lange (1955) | No | Lichenomphalia ericetorum | 931 | LC | ||||
| 5729 | Omphalina fulvopallens | P.D. Orton (1984) | No | Lichenomphalia ericetorum | 931 | LC | ||||
| 5730 | Omphalina grisella | (P. Karst.) M.M. Moser (1953) | No | Lichenomphalia velutina | 932 | LC ? |