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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | Cladonia sylvatica | auct. | No | Cladonia arbuscula | Cladonia arbuscula s. lat., records often include Cladonia ciliata and Cladonia portentosa | |||||
| 2012 | Cladonia symphycarpa | (Flörke) Fr. (1826) | Yes | Cladonia symphycarpa | Cladonia symphycarpia auct. | 424 | LC NS Sc | Cladonia symphycarpa | ||
| 2013 | Cladonia symphycarpia | (Flörke) Fr. (1826) | No | Cladonia symphycarpa | 424 | orth. error | LC NS Sc | |||
| 2014 | Cladonia tenuis | s. lat. | No | Cladonia ciliata s. lat. | Cladonia ciliata s. lat. | LC | ||||
| 2015 | Cladonia tenuis var. leucophaea | (Abbayes) Ahti | No | Cladonia ciliata var. ciliata | 372 | LC | ||||
| 2016 | Cladonia tenuis var. tenuis | (Flörke) Harm. | No | Cladonia ciliata var. tenuis | 373 | LC | ||||
| 2017 | Cladonia trassii | Ahti (1998) | Yes | Cladonia trassii | Cladonia stricta auct. brit. | 1590 | VU D2 NR Sc S8 | Cladonia trassii | ||
| 2018 | Cladonia turgida | Hoffm. | No | incorrectly reported from the British Isles | ||||||
| 2019 | Cladonia umbricola | Tønsberg & Ahti (1980) | Yes | Cladonia umbricola | Cladonia polydactyla var. umbricola | 1750 | sometimes considered a chemotype of Cladonia polydactyla | DD NR | CR | Cladonia umbricola |
| 2020 | Cladonia uncialis | auct. brit. p.max.p. | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2021 | Cladonia uncialis subsp. biuncialis | (Hoffm.) M. Choisy (1951) | Yes | Cladonia uncialis subsp. biuncialis | Cladonia uncialis | 426 | LC | Cladonia uncialis subsp. biuncialis | ||
| 2022 | Cladonia uncialis subsp. dicraea | (Ach.) D. Hawksw. | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2023 | Cladonia uncialis subsp. uncialis | (L.) F.H. Wigg. (1780) | Yes | Cladonia uncialis subsp. uncialis | 1594 | NT NS Sc | Cladonia uncialis subsp. uncialis | |||
| 2024 | Cladonia uncialis var. dicraea | (Ach.) Räsänen | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2025 | Cladonia uncinata | Hoffm. (1796) | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2026 | Cladonia verticillata | (Hoffm.) Schaer. (1823) | Yes | Cladonia verticillata | Cladonia cervicornis subsp. verticillata | 370 | LC | Cladonia verticillata | ||
| 2027 | Cladonia verticillata var. cervicornis | (Ach.) Flörke | No | Cladonia cervicornis | 369 | LC | ||||
| 2028 | Cladonia zopfii | Vain. (1920) | Yes | Cladonia zopfii | Cladonia destricta | 427 | LC NS | Cladonia zopfii | ||
| 2029 | Cladoniicola staurospora | Diederich, van den Boom & Aptroot (2001) | Yes | Cladoniicola staurospora | 2553 | LC NR | LF | Cladoniicola staurospora | ||
| 2030 | Cladophialophora normandinae | (Diederich & Etayo) Diederich (2013) | Yes | Cladophialophora normandinae | Sclerococcum normandinae | 2291 | lichenicolous on Normandina pulchella | NE NR | LF | Cladophialophora normandinae |
| 2031 | Cladophialophora parmeliae | (Etayo & Diederich) Diederich (2013) | Yes | Cladophialophora parmeliae | Sclerococcum parmeliae | 2617 | NE | LF | Cladophialophora parmeliae | |
| 2032 | Cladosporium licheniphilum | Heuchert & U. Braun (2006) | Yes | Cladosporium licheniphilum | 2669 | lichenicolous on Xanthoria parietina | NE NR | LF | Cladosporium licheniphilum | |
| 2033 | Clandestinotrema antoninii | (Purvis & P. James) Rivas Plata, Lücking & Lumbsch (2012) | Yes | Clandestinotrema antoninii | 2832 | NE NR | ||||
| 2034 | Clathroporina calcarea | Walt. Watson (1925) | No | Clathroporinopsis nidarosiensis | 179 | LC | ||||
| 2035 | Clathroporina larbalestieri | (A.L. Sm.) A.L. Sm. | No | Thelenella larbalestieri | 899 | VU D2 NR E Sc IR | ||||
| 2036 | Clathroporinopsis nidarosiensis | (Kindt) P.F. Cannon (2024) | Yes | Clathroporinopsis nidarosiensis | Belonia nidarosiensis; Clathroporina calcarea; Gyalecta nidarosiensis | 179 | LC | Clathroporinopsis nidarosiensis | ||
| 2037 | Clathrus virescens | Huds. | No | Chaenotheca furfuracea | 466 | LC | ||||
| 2038 | Claurouxia chalybeioides | (Nyl.) D. Hawksw. (1988) | Yes | Claurouxia chalybeioides | Lecidea chalybeioides | 1709 | LC NS | Claurouxia chalybeioides | ||
| 2039 | Clauzadea chondrodes | (A. Massal.) Clauzade & Cl. Roux (2001) | Yes | Clauzadea chondrodes | Clauzadea cyclisca | 2369 | DD NR | Clauzadea chondrodes | ||
| 2040 | Clauzadea cyclisca | (A. Massal.) V. Wirth | No | Clauzadea chondrodes | 2369 | DD NR |