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 icmalea | Ach. | No | Placynthiella icmalea | 732 | LC | ||||
| 4112 | Lecidea illita | Nyl. | No | Rimularia badioatra | 733 | LC NS | ||||
| 4113 | Lecidea ilyophora | Stirt. | No | Micarea melaena | 883 | LC | ||||
| 4114 | Lecidea immersa | (Hoffm.) Ach. | No | Clauzadea immersa | 734 | LC | ||||
| 4115 | Lecidea imponens | Leight. | No | Carbonea vitellinaria | 1880 | LC NS | LF | |||
| 4116 | Lecidea impressula | Leight. | No | Buellia aethalea | 200 | LC | ||||
| 4117 | Lecidea incana | auct. brit. 19th C | No | Megalospora tuberculosa | 862 | NT NS P Eng Sc Wa IR | ||||
| 4118 | Lecidea incompta | Borrer (1831) | No | Bellicidia incompta | 153 | VU A P Eng Sc Wa | ||||
| 4119 | Lecidea indigula | Nyl. | No | Herteliana gagei | 557 | LC NS | ||||
| 4120 | Lecidea infidula | Nyl. | No | Brianaria bauschiana | 873 | LC | ||||
| 4121 | Lecidea inops | Th. Fr. (1874) | Yes | Lecidea inops | 1658 | EN B NR P Eng S8 | Lecidea inops | |||
| 4122 | Lecidea inquinans | (Tul.) Nyl. | No | Micarea inquinans | 1877 | LC NR Sc | ||||
| 4123 | Lecidea inserena | Nyl. (1869) | No | Miriquidica subplumbea | 2641 | NE NS | ||||
| 4124 | Lecidea insidiosa | Th. Fr. | No | Ramboldia insidiosa | 1741 | NT NR Sc | ||||
| 4125 | Lecidea insita | Stirt. | No | Steinia geophana | 1349 | LC NS M* | ||||
| 4126 | Lecidea instratula | Nyl. | No | Clauzadeana macula | 746 | LC NS | ||||
| 4127 | Lecidea insularis | Nyl. | No | Lambiella insularis | 736 | LC NS | ||||
| 4128 | Lecidea interludens | Nyl. | No | Fuscidea kochiana | 520 | LC | ||||
| 4129 | Lecidea interpolata | Stirt. | No | Rinodina interpolata | 1290 | NT NR Sc | ||||
| 4130 | Lecidea irrubata | (Ach.) Ach. | No | Protoblastenia rupestris | 1189 | LC | ||||
| 4131 | Lecidea jurana | Schaer. | No | Farnoldia jurana | 863 | LC NS | ||||
| 4132 | Lecidea kaleida | Taylor | No | Buellia ocellata | 219 | LC | ||||
| 4133 | Lecidea kochiana | Hepp | No | Fuscidea kochiana | 520 | LC | ||||
| 4134 | Lecidea kochiana var. lygaea | (W. Mann) Leight. | No | Fuscidea lygaea | 527 | LC | ||||
| 4135 | Lecidea lactea s. lat. | s. lat. | Yes | Lecidea lactea s. lat. | 737 | LC | Lecidea lactea s. lat. | |||
| 4136 | Lecidea lactea s. str. | Flörke ex Schaer. s. str. (1828) | Yes | Lecidea lactea s. str. | Lecidea lapicida var. pantherinaLecidea pantherina | 2358 | LC | Lecidea lactea s. str. | ||
| 4137 | Lecidea lapicida | sensu A.L. Sm. p.p. | No | Lecidea lactea s. lat. | 737 | LC | ||||
| 4138 | Lecidea lapicida | (Ach.) Ach. (1803) | Yes | Lecidea lapicida | 738 | LC | Lecidea lapicida | |||
| 4139 | Lecidea lapicida var. lactea | (Flörke ex Schaer.) V. Wirth | No | Lecidea lactea s. lat. | 737 | LC | ||||
| 4140 | Lecidea lapicida var. pantherina | Ach. | No | Lecidea lactea s. str. | 2358 | currently a synonym but may be adopted as the correct name in the future | LC |