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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1681 | Celothelium ischnobelum | (Nyl.) M.B. Aguirre (1991) | Yes | Celothelium ischnobelum | Leptorhaphis carrollii Leptorhaphis ischnobela Tomasellia ischnobela |
1566 | LC | Celothelium ischnobelum | ||
| 1682 | Cenomyce alcicornis | (Lightf.) Ach. | No | Cladonia foliacea | 387 | LC | ||||
| 1683 | Cenomyce sparassa | (Ach.) Ach. | No | Cladonia squamosa var. squamosa | 2365 | LC | ||||
| 1684 | Cephalotrichum phillipsii | (Berk. & Leight.) S. Hughes (1958) | No | Leightoniomyces phillipsii | 2080 | NE NR | LF | |||
| 1685 | Cerania vermicularis | (Sw.) Gray (1821) | No | Thamnolia vermicularis | 1382 | LC | ||||
| 1686 | Ceratobasidium bulbillifaciens | Diederich & Lawrey (2014) | Yes | Ceratobasidium bulbillifaciens | 2642 | considered to be facultatively lichenicolous | NE | LF | Ceratobasidium bulbillifaciens | |
| 1687 | Cercidiospora | Körb. [orth. error] | No | Cercidospora | ||||||
| 1688 | Cercidospora caudata | Kernst. (1894) | Yes | Cercidospora caudata | 2656 | on Caloplaca arenaria | NE NR | LF | Cercidospora caudata | |
| 1689 | Cercidospora cladoniicola | Alstrup (1997) | Yes | Cercidospora cladoniicola | 2024 | NE NR | LF | Cercidospora cladoniicola | ||
| 1690 | Cercidospora decolorella | (Nyl.) O.E. Erikss. & J.Z. Yue (1992) | Yes | Cercidospora decolorella | 2382 | ? | LC NR Sc | LF | Cercidospora decolorella | |
| 1691 | Cercidospora epipolytropa | (Mudd) Arnold (1874) | Yes | Cercidospora epipolytropa | 2025 | LC NS | LF | Cercidospora epipolytropa | ||
| 1692 | Cercidospora lichenicola | (Zopf) Hafellner (1987) | No | Cercidospora punctillata | 2026 | NE NR | LF | |||
| 1693 | Cercidospora macrospora | (Uloth) Hafellner & Nav.-Ros. (2004) | Yes | Cercidospora macrospora | 2029 | NE NR | LF | Cercidospora macrospora | ||
| 1694 | Cercidospora parva | Hafellner & Ihlen (1998) | Yes | Cercidospora parva | 2027 | NE NR | LF | Cercidospora parva | ||
| 1695 | Cercidospora punctillata | (Nyl.) R. Sant. (2004) | Yes | Cercidospora punctillata | 2026 | NE NR | LF | Cercidospora punctillata | ||
| 1696 | Cercidospora stereocaulorum | (Arnold) Hafellner (1987) | Yes | Cercidospora stereocaulorum | Metasphaeria stereocaulorum | 2028 | LC NR | LF | Cercidospora stereocaulorum | |
| 1697 | Cercidospora thamnoliae | Zhurb. (2012) | Yes | Cercidospora thamnoliae | 2701 | on Thamnolia | NE NR | LF | Cercidospora thamnoliae | |
| 1698 | Cercidospora ulothii | Körb. | No | Cercidospora macrospora | 2029 | NE NR | LF | |||
| 1699 | Cercidospora verrucosaria | (Linds.) Arnold (1874) | Yes | Cercidospora verrucosaria | 2030 | NT NR | LF | Cercidospora verrucosaria | ||
| 1700 | Cerothallia luteoalba | (Turner) Arup, Frödén & Søchting (2013) | Yes | Cerothallia luteoalba | Caloplaca luteoalba | 266 | EN A2, C1 NS P Eng Sc Wa S8 | Cerothallia luteoalba | ||
| 1701 | Cetraria aculeata | (Schreb.) Fr. (1826) | Yes | Cetraria aculeata | Coelocaulon aculeatum Cornicularia aculeata |
430 | LC | Cetraria aculeata | ||
| 1702 | Cetraria aculeata f. hispida | (Cromb.) Cromb. (1894) | No | Cetraria muricata | 431 | LC | ||||
| 1703 | Cetraria aculeata var. hispida | Cromb. (1980) | No | Cetraria muricata | 431 | LC | ||||
| 1704 | Cetraria chlorophylla | (Willd.) Poetsch (1872) | No | Tuckermannopsis chlorophylla | 327 | LC | ||||
| 1705 | Cetraria commixta | (Nyl.) Th. Fr. | No | Cetrariella commixta | 328 | LC NS | ||||
| 1706 | Cetraria crispa | (Ach.) Nyl. | No | Cetraria ericetorum | 331 | LC NS | ||||
| 1707 | Cetraria cucullata | (Bellardi) Ach. | No | Flavocetraria cucullata | 329 | Flavocetraria cucullata (Bellardi) Kärnefelt & Thell, incorrectly reported from the British Isles | ||||
| 1708 | Cetraria delisei | (Bory ex Schaer.) Nyl. | No | Cetrariella delisei | 330 | NT NR Sc | ||||
| 1709 | Cetraria diffusa | auct. | No | Imshaugia aleurites | 1033 | LC | ||||
| 1710 | Cetraria ericetorum | Opiz (1852) | Yes | Cetraria ericetorum | 331 | LC NS | Cetraria ericetorum |