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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4051 | Lecidea excentrica | (Ach.) Röhl. (1813) | No | Rhizocarpon petraeum | 1249 | LC | ||||
| 4052 | Lecidea exigua | Chaub. (1821) | No | Traponora varians | 1769 | DD NR | ||||
| 4053 | Lecidea expallens | (Ach.) Borrer ex Hook. (1833) | No | Zeora expallens | 649 | LC | ||||
| 4054 | Lecidea expallens | sensu Hook. p.p. | No | Zeora orosthea | 757 | name or specific epithet valid but has been misused in the past | LC | |||
| 4055 | Lecidea expansa | Nyl. (1861) | No | Leimonis erratica | 719 | LC | ||||
| 4056 | Lecidea fecunda | (Th. Fr.) Leight. (1871) | No | Schadonia fecunda | 1310 | VU D2 NR Sc | ||||
| 4057 | Lecidea fecunda | sensu Leight. | No | identity uncertain | ||||||
| 4058 | Lecidea ferruginea | auct. p.p. | No | Blastenia crenularia | 253 | LC | ||||
| 4059 | Lecidea ferruginea | (Huds.) Chevall. (1926) | No | Blastenia ferruginea s. lat. | 2280 | |||||
| 4060 | Lecidea filamentosa | Stirt. | No | Palicella filamentosa | 2579 | NE NR | ||||
| 4061 | Lecidea flavicunda | Ach., auct. brit. p.min.p. | No | Porpidia flavicunda | 1791 | LC NS | ||||
| 4062 | Lecidea flavicunda | auct. brit. p.max.p. | No | Porpidia flavocruenta | 2398 | LC NS | ||||
| 4063 | Lecidea flexuosa | (Fr.) Nyl. | No | Trapeliopsis flexuosa | 692 | LC | ||||
| 4064 | Lecidea flexuosa f. aeruginosa | (Borrer) Leight. | No | Trapeliopsis flexuosa | 692 | LC | ||||
| 4065 | Lecidea flexuosa var. aeruginosa | (Borrer) Mudd | No | Trapeliopsis flexuosa | 692 | LC | ||||
| 4066 | Lecidea formosa | Bagl. & Carestia | No | Lecanora formosa | 795 | NT NR Sc | ||||
| 4067 | Lecidea fossarum | auct. brit. | No | Biatorella hemisphaerica | 181 | VU D2 NR Sc | ||||
| 4068 | Lecidea friesii | Ach. | No | Xylopsora friesii | 577 | LC NS | ||||
| 4069 | Lecidea fucata | Stirt. | No | Violella fucata | 908 | LC | ||||
| 4070 | Lecidea fuliginea | Ach. | No | Placynthiella icmalea | 732 | LC | ||||
| 4071 | Lecidea fuliginosa | Taylor (1836) | Yes | Lecidea fuliginosa | 721 | LC NS | Lecidea fuliginosa | |||
| 4072 | Lecidea fuliginosa var. subconfusa | (Nyl.) A.L. Sm. | No | Micarea subconfusa | 780 | DD NR Sc | ||||
| 4073 | Lecidea fumosa | (Hoffm.) Ach. | No | Lecidea fuscoatra | 2583 | LC | ||||
| 4074 | Lecidea fumosa var. deusta | sensu Mudd | No | Lecidea fuscoatra s. lat. | 724 | |||||
| 4075 | Lecidea fumosa var. grisella | (Flörke) Schaer. (1850) | No | Lecidea grisella | 2474 | LC | ||||
| 4076 | Lecidea furvella | Nyl. ex Mudd | No | Lambiella furvella | 722 | LC | ||||
| 4077 | Lecidea fuscescens | Sommerf. | No | Lecanora fuscescens | 723 | Ex | ||||
| 4078 | Lecidea fuscoatra | auct. p.p. | No | Lecidea grisella | 2474 | name or specific epithet valid but has been misused in the past | LC | |||
| 4079 | Lecidea fuscoatra f. deusta | sensu Leight. p.p. | No | Lecidea fuscoatra s. lat. | 724 | LC | ||||
| 4080 | Lecidea fuscoatra f. deusta | sensu Leight. p.p. | No | Lecidea grisella | 2474 | LC |