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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4111 | Lecidea helvola | (Körb. ex Hellb.) Hedl. | No | Biatora helvola | incorrectly reported from British Isles | |||||
| 4112 | Lecidea helvola | auct. brit., non (Körb. ex Hellb.) Hedl. | No | Vezdaea aestivalis | 1520 | LC M* | ||||
| 4113 | Lecidea hemipoliella | Nyl. | No | Micarea denigrata | 877 | LC | ||||
| 4114 | Lecidea hemipolioides | Nyl. | No | Micarea peliocarpa | 886 | LC | ||||
| 4115 | Lecidea henrica | Larbal. ex Nyl. | No | Herteliana gagei | 557 | LC NS | ||||
| 4116 | Lecidea herteliana | Fryday & Coppins (2012) | Yes | Lecidea herteliana | 2571 | Lecidea herteliana | ||||
| 4117 | Lecidea holomeloides | Nyl. (1866) | No | Gilbertaria holomeloides | LC NS | |||||
| 4118 | Lecidea humida | (Kullh.) Th. Fr. | No | Gregorella humida | 1879 | LC NR | ||||
| 4119 | Lecidea humigena | Taylor | No | Aphanopsis coenosa | 728 | LC NR Sc | ||||
| 4120 | Lecidea humosa | (Hoffm.) Leight. | No | Placynthiella uliginosa | 788 | LC | ||||
| 4121 | Lecidea huxariensis | (Beckh. ex J. Lahm) Zahlbr. (1925) | Yes | Lecidea huxariensis | 2650 | NE NR | Lecidea huxariensis | |||
| 4122 | Lecidea hyalinella | (Körb.) Jatta | No | Lecidea erythrophaea | 720 | VU B NR P Eng Sc | ||||
| 4123 | Lecidea hydrophila | Fr. | No | Porpidia hydrophila | 567 | LC | ||||
| 4124 | Lecidea hypnorum | Lib. (1853) | No | Bryobilimbia hypnorum | 730 | LC NS | ||||
| 4125 | Lecidea hypocyanea | Stirt. (1879) | No | Gilbertaria contristans | 309 | LC NS | ||||
| 4126 | Lecidea hypopta | auct. brit. | No | Lecanora phaeostigma | Lecanora hypopta | 731 | LC NS | |||
| 4127 | Lecidea icmadophila | (L. f.) Ach. (1803) | No | Icmadophila ericetorum | 584 | LC | ||||
| 4128 | Lecidea icmalea | Ach. | No | Placynthiella icmalea | 732 | LC | ||||
| 4129 | Lecidea illita | Nyl. | No | Rimularia badioatra | 733 | LC NS | ||||
| 4130 | Lecidea ilyophora | Stirt. | No | Micarea melaena | 883 | LC | ||||
| 4131 | Lecidea immersa | (Hoffm.) Ach. | No | Clauzadea immersa | 734 | LC | ||||
| 4132 | Lecidea imponens | Leight. | No | Carbonea vitellinaria | 1880 | LC NS | LF | |||
| 4133 | Lecidea impressula | Leight. | No | Buellia aethalea | 200 | LC | ||||
| 4134 | Lecidea incana | auct. brit. 19th C | No | Megalospora tuberculosa | 862 | NT NS P Eng Sc Wa IR | ||||
| 4135 | Lecidea incompta | Borrer (1831) | No | Bellicidia incompta | 153 | VU A P Eng Sc Wa | ||||
| 4136 | Lecidea indigula | Nyl. | No | Herteliana gagei | 557 | LC NS | ||||
| 4137 | Lecidea infidula | Nyl. | No | Brianaria bauschiana | 873 | LC | ||||
| 4138 | Lecidea inops | Th. Fr. (1874) | Yes | Lecidea inops | 1658 | EN B NR P Eng S8 | Lecidea inops | |||
| 4139 | Lecidea inquinans | (Tul.) Nyl. | No | Micarea inquinans | 1877 | LC NR Sc | ||||
| 4140 | Lecidea inserena | Nyl. (1869) | No | Miriquidica subplumbea | 2641 | NE NS |