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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 3001 | Hafellia disciformis | (Fr.) Marbach & H. Mayrhofer | No | Buellia disciformis | 204 | LC | ||||
| 3002 | Hafellia leptoclinoides | (Nyl.) Schied. & H. Mayrhofer | No | Buellia leptoclinoides | 210 | LC NR | ||||
| 3003 | Hafellia sanguinolenta | (T. Schauer) Hafellner & Türk | No | Buellia sanguinolenta | 1856 | NT NR Sc | ||||
| 3004 | Hainesia pertusariae | Etayo & Diederich (1996) | No | Epithamnolia pertusariae | 2292 | NE NR | LF | |||
| 3005 | Hainesia xanthoriae | Brackel (2009) | No | Epithamnolia xanthoriae | 2671 | NE NR | LF | |||
| 3006 | Halecania alpivaga | (Th. Fr.) M. Mayrhofer (1987) | Yes | Halecania alpivaga | Lecania alpivaga | 1756 | VU D2 NR Sc | Halecania alpivaga | ||
| 3007 | Halecania bryophila | Fryday & Coppins (1996) | Yes | Halecania bryophila | 983 | NT NR E Sc IR | Halecania bryophila | |||
| 3008 | Halecania giraltiae | Van den Boom & Etayo (2001) | Yes | Halecania giraltiae | 2774 | NE NR | Halecania giraltiae | |||
| 3009 | Halecania laevis | M. Brand & Van den Boom (2009) | Yes | Halecania laevis | Catillaria laevis | 2552 | NE NR | Halecania laevis | ||
| 3010 | Halecania micacea | Fryday & Coppins (1996) | Yes | Halecania micacea | 1821 | LC NR E Sc IR | Halecania micacea | |||
| 3011 | Halecania ralfsii | (Salwey) M. Mayrhofer (1987) | Yes | Halecania ralfsii | Catillaria jejuna Lecania ralfsii |
620 | LC NS | Halecania ralfsii | ||
| 3012 | Halecania rhypodiza | (Nyl.) Coppins (1989) | Yes | Halecania rhypodiza | Catillaria rhypodiza | 319 | VU D2 NR E P Sc IR | Halecania rhypodiza | ||
| 3013 | Halecania spodomela | (Nyl.) M. Mayrhofer (1987) | Yes | Halecania spodomela | Lecania spodomela | 622 | LC NR Sc | Halecania spodomela | ||
| 3014 | Halecania viridescens | Coppins & P. James (1989) | Yes | Halecania viridescens | 1704 | LC NS | Halecania viridescens | |||
| 3015 | Haloplaca britannica | (R. Sant.) Arup, Søchting & Frödén (2013) | Yes | Haloplaca britannica | Caloplaca britannica | 1689 | LC NS ?E Sc IR | Haloplaca britannica | ||
| 3016 | Haloplaca sorediella | (Arup) Arup, Frödén & Søchting (2013) | Yes | Haloplaca sorediella | Caloplaca sorediella | 2459 | LC NR | Haloplaca sorediella | ||
| 3017 | Haloplaca suaedae | (O.L. Gilbert & Coppins) Arup, Frödén & Søchting (2013) | Yes | Haloplaca suaedae | Caloplaca suaedae | 2321 | NT NR IR | Haloplaca suaedae | ||
| 3018 | Halospora deminuta | (Arnold) Tomas. & Cif. (1952) | No | Merismatium deminutum | 1152 | currently a synonym but may be adopted as the correct name in the future | LC NS | |||
| 3019 | Halospora discrepans | (J. Lahm ex Arnold) Hafellner (2011) | No | Merismatium discrepans | 1154 | currently a synonym but may be adopted as the correct name in the future |
LC NS | |||
| 3020 | Hastifera tenuispora | D. Hawksw. & Poelt | No | Micarea cinerea f. tenuispora | 2341 | LC NR | ||||
| 3021 | Haugania oederi | (Ach.) E.J. Möller & Timdal (2024) | Yes | Haugania oederi | Rhizocarpon oederi | 1267 | LC M* | Haugania oederi | ||
| 3022 | Hawksworthiana peltigerae | (Keissl.) Diederich (2024_ | Yes | Hawksworthiana peltigerae | Hawksworthiana peltigericola; Ramularia peltigericola; Refractohilum peltigerae | 2069 | NE NR | LF | Hawksworthiana peltigerae | |
| 3023 | Hawksworthiana peltigericola | (D. Hawksw.) U. Braun (1988) | No | Hawksworthiana peltigerae | 2069 | NE NR | LF | |||
| 3024 | Helmutiopsis aspersa | (Borrer) S.Y. Kondr., L. Lőkös & J.-S. Hur (2021) | No | Rinodina aspersa | 201 | NT NR Sc | ||||
| 3025 | Helmutiopsis atrocinerea | (Fr.) S. Y. Kondr., L. Lőkös & J.-S. Hur | No | Rinodina atrocinerea | 1281 | LC | ||||
| 3026 | Helocarpon crassipes | Th. Fr. | No | Micarea crassipes | 1661 | currently a synonym but may be adopted as the correct name in the future | VU D2 NR Sc | |||
| 3027 | Helotium cambricum | W. Phillips (nom. inval.) | No | Coenogonium luteum | 490 | LC L* | ||||
| 3028 | Hemigrapha astericus | auct. brit. | No | Hemigrapha atlantica | 2307 | NT NR | LF | |||
| 3029 | Hemigrapha atlantica | Diederich & Wedin (2000) | Yes | Hemigrapha atlantica | Hemigrapha astericus auct. brit. | 2307 | NT NR | LF | Hemigrapha atlantica | |
| 3030 | Henrica melaspora | (Taylor) Savić & Tibell (2008) | Yes | Henrica melaspora | Polyblastia melaspora; Polyblastia scotinospora | 1158 | LC NS | Henrica melaspora |