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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3121 | Hypotrachyna revoluta s. str. | (Flörke) Hale s. str. (1975) | Yes | Hypotrachyna revoluta s.str. | Parmelia revoluta | 2577 | LC | Hypotrachyna revoluta s. str. | ||
| 3122 | Hypotrachyna sinuosa | (Sm.) Hale (1975) | Yes | Hypotrachyna sinuosa | Parmelia sinuosa | 1017 | LC Sc IR | Hypotrachyna sinuosa | ||
| 3123 | Hypotrachyna taylorensis | (M.E. Mitch.) Hale (1974) | Yes | Hypotrachyna taylorensis | Parmelia taylorensis | 1023 | LC Sc IR | Hypotrachyna taylorensis | ||
| 3124 | Icmadophila ericetorum | (L.) Zahlbr. (1895) | Yes | Icmadophila ericetorum | 584 | LC | Icmadophila ericetorum | |||
| 3125 | Illosporiopsis christiansenii | (B.L. Brady & D. Hawksw.) D. Hawksw. (2001) | Yes | Illosporiopsis christiansenii | Hobsonia christiansenii | 2071 | LC NS | LF | Illosporiopsis christiansenii | |
| 3126 | Illosporium carneum | Fr. (1829) | Yes | Illosporium carneum | 2074 | NE NR | LF | Illosporium carneum | ||
| 3127 | Illosporium coccineum | Fr. | No | Phlyctis argena | 1110 | LC | ||||
| 3128 | Illosporium corallinum | Roberge | No | Marchandiomyces corallinus | 2109 | LC | LF | |||
| 3129 | Illosporium roseum | auct. | No | Marchandiomyces corallinus | 2109 | LC | LF | |||
| 3130 | Imbricaria fuliginosa | (Fr. ex Duby) Arnold | No | Melanelixia fuliginosa | 998 | LC | ||||
| 3131 | Imbricaria fuliginosa subsp. glabratula | (Lamy) Arnold | No | Melanelixia glabratula | 997 | LC | ||||
| 3132 | Imbricaria lanata | (L.) Arnold (1875) | No | Ephebe lanata | 509 | LC | ||||
| 3133 | Immersaria athroocarpa | (Ach.) Rambold & Pietschm. (1989) | Yes | Immersaria athroocarpa | Lecidea athroocarpa Porpidia arthroocarpa |
699 | LC NS | Immersaria athroocarpa | ||
| 3134 | Imshaugia aleurites | (Ach.) S.L.F. Mey. (1985) | Yes | Imshaugia aleurites | Parmeliopsis aleurites | 1033 | LC | Imshaugia aleurites | ||
| 3135 | Ingaderia sorediata | (Sparrius, P. James & M.A. Allen) Ertz (2023) | Yes | Ingaderia sorediata | Fulvophyton sorediatum; Peterjamesia sorediata; Roccellographa sorediata; Sclerophytomyces circumscriptus var. sorediatus | 2439 | LC NR | Ingaderia sorediata | ||
| 3136 | Ingaderia vandenboomii | Ertz (2023) | Yes | Ingaderia vandenboomii | Llimonaea sorediata | 2466 | LC NS | Ingaderia vandenboomii | ||
| 3137 | Inoderma byssaceum | (Weigel) Gray (1821) | Yes | Inoderma byssaceum | Arthonia byssacea | 2604 | VU DI NR | Inoderma byssaceum | ||
| 3138 | Inoderma epigaea | (Pers.) Gray | No | Thrombium epigaeum | 1414 | LC NS | ||||
| 3139 | Inoderma subabietinum | (Coppins & P. James) Ertz & Frisch (2015) | Yes | Inoderma subabietinum | Lecanactis subabietina | 606 | LC Sc IR | Inoderma subabietinum | ||
| 3140 | Intralichen baccisporus | D. Hawksw. & M.S. Cole (2002) | Yes | Intralichen baccisporus | 2424 | NE NR | LF | Intralichen baccisporus | ||
| 3141 | Intralichen christiansenii | (D. Hawksw.) D. Hawksw. & M.S. Cole (2001) | Yes | Intralichen christiansenii | Bispora christiansenii | 2019 | LC NS | LF | Intralichen christiansenii | |
| 3142 | Intralichen lichenicola | (M.S. Christ. & D. Hawksw.) D. Hawksw. & M.S. Cole (2002) | Yes | Intralichen lichenicola | 2448 | NE NR | LF | Intralichen lichenicola | ||
| 3143 | Intralichen lichenum | (Diederich) D. Hawksw. & M.S. Cole (2002) | Yes | Intralichen lichenum | Bispora lichenum | 2020 | NE NR | LF | Intralichen lichenum | |
| 3144 | Involucropyrenium romeanum | (B. de Lesd.) Breuss (2016) | No | Verrucaria romeana | 2621 | NE NR | ||||
| 3145 | Involucropyrenium waltheri | (Kremp.) Breuss (1996) | Yes | Involucropyrenium waltheri | Catapyrenium waltheri | 1862 | CR B2, C2,D NR Sc | Involucropyrenium waltheri | ||
| 3146 | Ionaspis chrysophana | (Körb.) Arnold (1873) | No | Hymenelia suaveolens | 590 | DD NS | ||||
| 3147 | Ionaspis cyanocarpa | (Anzi) Jatta | No | Hymenelia cyanocarpa | 1706 | LC NS | ||||
| 3148 | Ionaspis epulotica | (Ach.) Arnold | No | Hymenelia epulotica | 585 | LC NS | ||||
| 3149 | Ionaspis epulotica var. crustosa | H. Magn. (1933) | No | Hymenelia rhodopis | 595 | DD NR Sc | ||||
| 3150 | Ionaspis heteromorpha | (Kremp.) Arnold (1874) | No | Hymenelia heteromorpha | 587 | VU D2 NR Sc |