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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4021 | Lecidea episema | Nyl. (1853) | No | Kiliasia episema | 1904 | LC | LF | |||
| 4022 | Lecidea epixanthoidiza | auct. p.max.p., non Nyl. | No | Biatora chrysantha | 1830 | LC NS | ||||
| 4023 | Lecidea epixanthoidiza | Nyl., non auct. brit. | No | Biatora efflorescens | 718 | NT NR Sc | ||||
| 4024 | Lecidea erratica | Körb. (1861) | No | Leimonis erratica | 719 | LC | ||||
| 4025 | Lecidea erythrella | (Ach.) Schaer. (1833) | No | Gyalolechia flavovirescens | 255 | LC | ||||
| 4026 | Lecidea erythrophaea | Flörke ex Sommerf. (1826) | Yes | Lecidea erythrophaea | Lecidea tenebricosa auct. p.p. | 720 | VU B NR P Eng Sc | Lecidea erythrophaea | ||
| 4027 | Lecidea euphorea | auct. brit. | No | Lecidella elaeochroma f. elaeochroma | 797 | LC | ||||
| 4028 | Lecidea exanthematica | (Sm.) Nyl. | No | Petractis clausa | 1098 | |||||
| 4029 | Lecidea excentrica | (Ach.) Röhl. (1813) | No | Rhizocarpon petraeum | 1249 | LC | ||||
| 4030 | Lecidea exigua | Chaub. (1821) | No | Traponora varians | 1769 | DD NR | ||||
| 4031 | Lecidea expallens | (Ach.) Borrer (1833) | No | Lecanora expallens | 649 | LC | ||||
| 4032 | Lecidea expallens | sensu Hook. p.p. | No | Lecanora orosthea | 757 | name or specific epithet valid but has been misused in the past | LC | |||
| 4033 | Lecidea expansa | Nyl. (1861) | No | Leimonis erratica | 719 | LC | ||||
| 4034 | Lecidea fecunda | (Th. Fr.) Leight. (1871) | No | Schadonia fecunda | 1310 | VU D2 NR Sc | ||||
| 4035 | Lecidea fecunda | sensu Leight. | No | identity uncertain | ||||||
| 4036 | Lecidea ferruginea | auct. p.p. | No | Blastenia crenularia | 253 | LC | ||||
| 4037 | Lecidea ferruginea | (Huds.) Chevall. (1926) | No | Blastenia ferruginea s. lat. | 2280 | |||||
| 4038 | Lecidea filamentosa | Stirt. | No | Palicella filamentosa | 2579 | NE NR | ||||
| 4039 | Lecidea flavicunda | Ach., auct. brit. p.min.p. | No | Porpidia flavicunda | 1791 | LC NS | ||||
| 4040 | Lecidea flavicunda | auct. brit. p.max.p. | No | Porpidia flavocruenta | 2398 | LC NS | ||||
| 4041 | Lecidea flexuosa | (Fr.) Nyl. | No | Trapeliopsis flexuosa | 692 | LC | ||||
| 4042 | Lecidea flexuosa f. aeruginosa | (Borrer) Leight. | No | Trapeliopsis flexuosa | 692 | LC | ||||
| 4043 | Lecidea flexuosa var. aeruginosa | (Borrer) Mudd | No | Trapeliopsis flexuosa | 692 | LC | ||||
| 4044 | Lecidea formosa | Bagl. & Carestia | No | Lecanora formosa | 795 | NT NR Sc | ||||
| 4045 | Lecidea fossarum | auct. brit. | No | Biatorella hemisphaerica | 181 | VU D2 NR Sc | ||||
| 4046 | Lecidea friesii | Ach. | No | Xylopsora friesii | 577 | LC NS | ||||
| 4047 | Lecidea fucata | Stirt. | No | Violella fucata | 908 | LC | ||||
| 4048 | Lecidea fuliginea | Ach. | No | Placynthiella icmalea | 732 | LC | ||||
| 4049 | Lecidea fuliginosa | Taylor (1836) | Yes | Lecidea fuliginosa | 721 | LC NS | Lecidea fuliginosa | |||
| 4050 | Lecidea fuliginosa var. subconfusa | (Nyl.) A.L. Sm. | No | Micarea subconfusa | 780 | DD NR Sc |