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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4891 | Lichen deustus | Lightf., non L. | No | Umbilicaria proboscidea | 1453 | LC | ||||
| 4892 | Lichen didactylos | With. [orth. var.] | No | Peltigera didactyla | 1053 | LC | ||||
| 4893 | Lichen didactylus | With. | No | Peltigera didactyla | 1053 | LC | ||||
| 4894 | Lichen digitatus | L. | No | Cladonia digitata | 383 | LC | ||||
| 4895 | Lichen dillenii | With. | No | Umbilicaria grisea | 1448 | |||||
| 4896 | Lichen distortus | With. (1776) | No | Physconia distorta | 1130 | LC | ||||
| 4897 | Lichen dolosus | sensu Sm. (1814) | No | identity uncertain | ||||||
| 4898 | Lichen dubius | Sm. (1814) non Wulfen (1791) | No | Lecidella pulveracea | 801 | Ex | ||||
| 4899 | Lichen effusus | sensu Sm. (1808) p.p. | Coenogonium pineti | 489 | LC | |||||
| 4900 | Lichen ehrhartianus | Ach. (1799) | No | Cliostomum corrugatum | 428 | VU B NR P Eng | ||||
| 4901 | Lichen ericetorum | L. | No | Icmadophila ericetorum | 584 | LC | ||||
| 4902 | Lichen erythrellus | Ach. (1799) | No | Gyalolechia flavovirescens | 255 | LC | ||||
| 4903 | Lichen exilis | Lightf. | No | ? Ephebe lanata | ||||||
| 4904 | Lichen fahlunensis | auct. p.p. | No | Cetrariella commixta | 328 | LC NS | ||||
| 4905 | Lichen fahlunensis | L., non auct. brit. | No | Melanelia stygia | 1019 | name not used by British authors | ||||
| 4906 | Lichen fahlunensis | auct. p.p. | No | Melanelia hepatizon | 332 | LC NS | ||||
| 4907 | Lichen farinaceus | L. | No | Ramalina farinacea | 1234 | LC | ||||
| 4908 | Lichen fascicularis | L. | No | Gabura fascicularis | 444 | NT NS P Sc WaL IR | ||||
| 4909 | Lichen fastigiatus | Pers. | No | Ramalina fastigiata | 1235 | LC | ||||
| 4910 | Lichen fimbriatus | L. | No | Cladonia fimbriata | 384 | LC | ||||
| 4911 | Lichen flavescens | Huds. (1762) | No | Variospora flavescens | 259 | LC | ||||
| 4912 | Lichen flavicans | Sw. | No | Teloschistes flavicans | 1381 | VU A NS P Eng Wa S8 | ||||
| 4913 | Lichen flavorubescens | Huds. (1762) | No | Gyalolechia flavorubescens | 254 | EN A NS P Eng Sc Wa | ||||
| 4914 | Lichen floridus | L. | No | Usnea florida | 1462 | NT ? P Eng Sc Wa | ||||
| 4915 | Lichen fluviatilis | Huds. (1778) | No | Lathagrium dichotomum | 446 | VU B NS P Eng Sc Wa S8 | ||||
| 4916 | Lichen fluviatilis | Weber (1778) | No | Dermatocarpon luridum | 487 | LC | ||||
| 4917 | Lichen fluviatilis | sensu Sm. (1809) | No | Scytinium plicatile | 843 | LC | ||||
| 4918 | Lichen foliaceus | Huds. | No | Cladonia foliacea | 387 | LC | ||||
| 4919 | Lichen fragilis | sensu Sm., non L. | No | Bunodophoron melanocarpum | 1334 | LC | ||||
| 4920 | Lichen fragilis | L. | No | Sphaerophorus fragilis | 1332 | LC |