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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3991 | Lecidea dolosa | auct. brit. | No | Lecidella elaeochroma f. elaeochroma | 797 | LC | ||||
| 3992 | Lecidea dubia | Turner & Borrer (1833), non Schaer. (1828) | No | Lecidella pulveracea | 801 | Ex | ||||
| 3993 | Lecidea dubiosa | Zahlbr. | No | Lecidella pulveracea | 801 | Ex | ||||
| 3994 | Lecidea dufourii | Ach. ex Nyl. (1873) | No | Gilbertaria contristans | 309 | as "dufourei" | LC NS | |||
| 3995 | Lecidea ecrustacea | (Anzi ex Arnold) Arnold | No | incorrectly reported from the British Isles | ||||||
| 3996 | Lecidea efflorescens | (Hedl.) Erichsen | No | Biatora efflorescens | 718 | NT NR Sc | ||||
| 3997 | Lecidea effusa | auct. brit. p.p. | No | Bacidia sp. | various Bacidia spp. with pale apothecia | |||||
| 3998 | Lecidea effusa | auct. brit. p.p. | No | Lecania cyrtellina | 614 | LC | ||||
| 3999 | Lecidea effusa f. fuscella | (Fr.) ? | No | Bacidia arceutina | 131 | LC | ||||
| 4000 | Lecidea effusa var. caesiopruinosa | (Mudd) Leight. (1871) | No | Bacidia beckhausii | 135 | LC NS | ||||
| 4001 | Lecidea effusa var. delicata | Larbal. ex Leight. (1879) | No | Bacidina delicata | 144 | LC | ||||
| 4002 | Lecidea effusa var. fuscella | (Fr.) Leight. (1871) | No | Bacidia arceutina | 131 | LC | ||||
| 4003 | Lecidea effusa var. inundata | (Fr.) Leight. (1871) | No | Bacidina inundata | 154 | LC | ||||
| 4004 | Lecidea ehrhartiana | (Ach.) Ach. (1803) | No | Cliostomum corrugatum | 428 | VU B NR P Eng | ||||
| 4005 | Lecidea ehrhartiana var. polytropa | (Hoffm.) Ach. (1808) | No | Lecanora polytropa | 667 | LC | ||||
| 4006 | Lecidea ehrhartiana var. polytropa | auct. brit. p.p. | No | Lecanora intricata | 656 | LC | ||||
| 4007 | Lecidea elaeochroma | (Ach.) Ach. | No | Lecidella elaeochroma f. elaeochroma | 797 | LC | ||||
| 4008 | Lecidea elata | Schaer. | No | Lecanora marginata | 1766 | DD NR Sc | ||||
| 4009 | Lecidea emphysa | Stirt. | No | Arthonia sp. | Arthonia ? vinosa | |||||
| 4010 | Lecidea enclitica | auct. brit. | No | Lecidea paraclitica | 758 | DD NR | ||||
| 4011 | Lecidea endocarpicola | Linds. | No | ? Toniniopsis verrucarioides | ||||||
| 4012 | Lecidea endocyanea | Stirt. | No | Schaereria fuscocinerea var. fuscocinerea | 1313 | LC | ||||
| 4013 | Lecidea endoleuca | (Nyl.) Nyl. | No | Bacidia laurocerasi | 155 | LC | ||||
| 4014 | Lecidea endomelaena | Leight. (1876) | Yes | Lecidea endomelaena | 717 | DD NR | Lecidea endomelaena | |||
| 4015 | Lecidea endopella | Leight. ex Cromb. | No | Lecidea turgidula | 787 | LC | ||||
| 4016 | Lecidea enterchlora | Taylor (1879) | No | Lecidella scabra | 802 | LC | ||||
| 4017 | Lecidea epimarta | Nyl. | No | Pycnothelia papillaria | 1211 | LC | ||||
| 4018 | Lecidea epiphorbia | Stirt. (1874) | No | Arthonia peltigerea | 1935 | Needs conf. if type can be traced | NE NR | LF | ||
| 4019 | Lecidea epipolia | auct. brit. p.max.p. | No | Diplotomma alboatrum | 496 | LC | ||||
| 4020 | Lecidea epipolia | auct. brit. p.min.p. | No | Diplotomma hedinii | 498 | LC NS |