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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2701 | Foraminella hyperopta | (Ach.) S.L.F. Mey. | No | Parmeliopsis hyperopta | 1035 | LC | ||||
| 2702 | Forssellia concordatula | (Nyl.) M. Schultz & M. Prieto (2024) | Yes | Forssellia concordatula | Pterygiopsis concordatula; Pterygiopsis coracodiza | 1796 | NT NS | |||
| 2703 | Francisrosea bicolor | Ertz & Sanderson (2021) | Yes | Francisrosea bicolor | 2788 | NE NR | Francisrosea bicolor | |||
| 2704 | Frigidopyrenia bryospila | (Nyl.) Grube (2005) | Yes | Frigidopyrenia bryospila | Pyrenocollema bryospilum Arthopyrenia bryospila |
78 | DD NR | Frigidopyrenia bryospila | ||
| 2705 | Frutidella caesioatra | (Schaer.) Kalb (1994) | Yes | Frutidella caesioatra | Lecidea caesioatra | 705 | LC NS | Frutidella caesioatra | ||
| 2706 | Frutidella furfuracea | (Anzi) M. Westb. & M. Svensson (2017) | Yes | Frutidella furfuracea | Frutidella pullata; Lecidea pullata | 2488 | DD NR | Frutidella furfuracea | ||
| 2707 | Frutidella pullata | (Norman) Schmull (2011) | No | Frutidella furfuracea | 2488 | DD NR | ||||
| 2708 | Fucus pumilus | Huds. | No | Lichina pygmaea | 852 | LC | ||||
| 2709 | Fucus pygmaeus | Lightf. | No | Lichina pygmaea | 852 | LC | ||||
| 2710 | Fucus pygmaeus f. minor | Turner | No | Lichina confinis | 851 | LC | ||||
| 2711 | Fulgensia bracteata var. alpina | (Th. Fr.) Räsänen (1943) | No | Gyalolechia bracteata | 512 | VU D2 NR Sc | ||||
| 2712 | Fulgensia fulgens | (Sw.) Elenkin (1907) | No | Gyalolechia fulgens | 513 | EN B1+2 NR P Eng Wa | ||||
| 2713 | Fulvophyton sorediatum | (Sparrius, P. James & M.A. Allen) Tehler & van den Boom (2017) | No | Ingaderia sorediata | 2439 | LC NR | ||||
| 2714 | Fusarium kuhnii | auct. | No | ? Athelia arachnoidea | ||||||
| 2715 | Fusarium peltigerae | Westend. (1849) | No | Scolecofusarium ciliatum | 2288 | NE NR | LF | |||
| 2716 | Fuscidea aggregata | (Flot.) V. Wirth & Vězda | No | Fuscidea austera | 514 | NT NS | ||||
| 2717 | Fuscidea arboricola | Coppins & Tønsberg (1992) | Yes | Fuscidea arboricola | 1701 | LC NS | Fuscidea arboricola | |||
| 2718 | Fuscidea atlantica | (H. Magn.) P. James & Poelt | No | Fuscidea intercincta | 519 | LC NS | ||||
| 2719 | Fuscidea austera | (Nyl.) P. James (1980) | Yes | Fuscidea austera | Fuscidea aggregata Fuscidea taeniarum Lecidea taeniarum |
514 | NT NS | Fuscidea austera | ||
| 2720 | Fuscidea cyathoides var. corticola | auct. brit. | No | Fuscidea cyathoides var. cyathoides | 515 | LC | ||||
| 2721 | Fuscidea cyathoides var. corticola | No | 516 | BLS number no longer used | ||||||
| 2722 | Fuscidea cyathoides var. cyathoides | (Ach.) V. Wirth & Vězda (1972) | Yes | Fuscidea cyathoides var. cyathoides | Fuscidea cyathoides var. corticolaLecidea cyathoides | 515 | LC | Fuscidea cyathoides var. cyathoides | ||
| 2723 | Fuscidea cyathoides var. sorediata | (H. Magn.) Poelt (1978) | Yes | Fuscidea cyathoides var. sorediata | 517 | sorediate morph | NE NR Sc | Fuscidea cyathoides var. sorediata | ||
| 2724 | Fuscidea gothoburgensis | (H. Magn.) V. Wirth & Vězda (1972) | Yes | Fuscidea gothoburgensis | Fuscidea gothoburgensis f. maculosa | 518 | LC NS | Fuscidea gothoburgensis | ||
| 2725 | Fuscidea gothoburgensis f. maculosa | (H. Magn.) Poelt | No | Fuscidea gothoburgensis | 518 | LC NS | ||||
| 2726 | Fuscidea hibernica | P. James & Poelt | No | Ropalospora hibernica | 1755 | DD NR Sc | ||||
| 2727 | Fuscidea intercincta | (Nyl.) Poelt (1978) | Yes | Fuscidea intercincta | Fuscidea atlantica | 519 | LC NS | Fuscidea intercincta | ||
| 2728 | Fuscidea kochiana | (Hepp) V. Wirth & Vězda (1972) | Yes | Fuscidea kochiana | Lecidea kochiana | 520 | LC | Fuscidea kochiana | ||
| 2729 | Fuscidea lightfootii | (Sm.) Coppins & P. James (1978) | Yes | Fuscidea lightfootii | Catillaria lightfootii | 521 | LC | Fuscidea lightfootii | ||
| 2730 | Fuscidea lugubris | (Sommerf.) P. James & Purvis | No | Ropalospora lugubris f. lugubris | 522 |