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 granulosa var. flexuosa | (Fr.) Schaer. | No | Trapeliopsis flexuosa | 692 | LC | ||||
| 4022 | Lecidea griffithii | (Sm.) Hook. | No | Cliostomum griffithii | 429 | LC | ||||
| 4023 | Lecidea grisella | Flörke (1829) | Yes | Lecidea grisella | Lecidea fuscoatra var. grisella | 2474 | LC | Lecidea grisella | ||
| 4024 | Lecidea grisella f. meiosporiza | Nyl. | No | Lecidea grisella | 2474 | LC | ||||
| 4025 | Lecidea griseoatra | (Flot.) Schaer. | No | Miriquidica griseoatra | 781 | LC NS | ||||
| 4026 | Lecidea griseoatra | sensu A.L. Sm. | No | Schaereria fuscocinerea var. fuscocinerea | 1313 | LC | ||||
| 4027 | Lecidea grossa | Pers. ex Nyl. | No | Megalaria grossa | 323 | LC | ||||
| 4028 | Lecidea grumosa | Leight. | No | Agyrium rufum | 1611 | LC | F | |||
| 4029 | Lecidea gyrizans | Nyl. | No | Lambiella gyrizans | 725 | LC NS | ||||
| 4030 | Lecidea gyrophorica | Tønsberg | No | Biatora chrysantha | 1830 | LC NS | ||||
| 4031 | Lecidea haerjedalica | H. Magn. (1948) | Yes | Lecidea haerjedalica | 1965 | DD NR Sc | Lecidea haerjedalica | |||
| 4032 | Lecidea heeri | Hepp | No | Scutula heeri | Scutula heeri (Hepp) Trevis., incorrectly reported from the British Isles | |||||
| 4033 | Lecidea heerii | Hepp [orth. error] | No | Scutula heeri | Scutula heeri (Hepp) Trevis., incorrectly reported from the British Isles | |||||
| 4034 | Lecidea helvola | (Körb. ex Hellb.) Hedl. | No | Biatora helvola | incorrectly reported from British Isles | |||||
| 4035 | Lecidea helvola | auct. brit., non (Körb. ex Hellb.) Hedl. | No | Vezdaea aestivalis | 1520 | LC M* | ||||
| 4036 | Lecidea hemipoliella | Nyl. | No | Micarea denigrata | 877 | LC | ||||
| 4037 | Lecidea hemipolioides | Nyl. | No | Micarea peliocarpa | 886 | LC | ||||
| 4038 | Lecidea henrica | Larbal. ex Nyl. | No | Herteliana gagei | 557 | LC NS | ||||
| 4039 | Lecidea herteliana | Fryday & Coppins (2012) | Yes | Lecidea herteliana | 2571 | Lecidea herteliana | ||||
| 4040 | Lecidea holomeloides | Nyl. (1866) | No | Gilbertaria holomeloides | LC NS | |||||
| 4041 | Lecidea humida | (Kullh.) Th. Fr. | No | Gregorella humida | 1879 | LC NR | ||||
| 4042 | Lecidea humigena | Taylor | No | Aphanopsis coenosa | 728 | LC NR Sc | ||||
| 4043 | Lecidea humosa | (Hoffm.) Leight. | No | Placynthiella uliginosa | 788 | LC | ||||
| 4044 | Lecidea huxariensis | (Beckh. ex J. Lahm) Zahlbr. (1925) | Yes | Lecidea huxariensis | 2650 | NE NR | ||||
| 4045 | Lecidea hyalinella | (Körb.) Jatta | No | Lecidea erythrophaea | 720 | VU B NR P Eng Sc | ||||
| 4046 | Lecidea hydrophila | Fr. | No | Porpidia hydrophila | 567 | LC | ||||
| 4047 | Lecidea hypnorum | Lib. (1853) | No | Bryobilimbia hypnorum | 730 | LC NS | ||||
| 4048 | Lecidea hypocyanea | Stirt. (1879) | No | Gilbertaria contristans | 309 | LC NS | ||||
| 4049 | Lecidea hypopta | auct. brit. | No | Lecanora phaeostigma | Lecanora hypopta | 731 | LC NS | |||
| 4050 | Lecidea icmadophila | (L. f.) Ach. (1803) | No | Icmadophila ericetorum | 584 | LC |