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 strepsilis | (Ach.) Mont. (1839) | Yes | Cladonia strepsilis | 420 | LC | Cladonia strepsilis | |||
| 2012 | Cladonia stricta | auct. brit. | No | Cladonia trassii | 1590 | Cladonia trassii Ahti | VU D2 NR Sc S8 | |||
| 2013 | Cladonia stygia | (Fr.) Ruoss (1985) | Yes | Cladonia stygia | 425 | DD NR Sc | Cladonia stygia | |||
| 2014 | Cladonia subcervicornis | (Vain.) Kernst. (1900) | Yes | Cladonia subcervicornis | 421 | LC | Cladonia subcervicornis | |||
| 2015 | Cladonia subfurcata | (Nyl.) Arnold | No | incorrectly reported from the British Isles | ||||||
| 2016 | Cladonia subimpexa | P.A. Duvign. {CR} | No | Cladonia portentosa | 409 | LC | CR | |||
| 2017 | Cladonia subrangiformis | Sandst. | No | Cladonia furcata subsp. subrangiformis | 390 | LC | ||||
| 2018 | Cladonia subsquamosa | (Nyl. ex Leight.) Cromb., non Kremp. | No | Cladonia squamosa var. subsquamosa | 417 | LC | ||||
| 2019 | Cladonia subulata | (L.) F.H. Wigg. (1780) | Yes | Cladonia subulata | Cladonia cornutoradiata | 422 | LC | Cladonia subulata | ||
| 2020 | Cladonia sulphurina | (Michx.) Fr. (1831) | Yes | Cladonia sulphurina | Cladonia deformis auct. p.p. Cladonia gonecha |
423 | LC | Cladonia sulphurina | ||
| 2021 | Cladonia sylvatica | auct. | No | Cladonia arbuscula | Cladonia arbuscula s. lat., records often include Cladonia ciliata and Cladonia portentosa | |||||
| 2022 | Cladonia symphycarpa | (Flörke) Fr. (1826) | Yes | Cladonia symphycarpa | Cladonia symphycarpia auct. | 424 | LC NS Sc | Cladonia symphycarpa | ||
| 2023 | Cladonia symphycarpia | (Flörke) Fr. (1826) | No | Cladonia symphycarpa | 424 | orth. error | LC NS Sc | |||
| 2024 | Cladonia tenuis | s. lat. | No | Cladonia ciliata s. lat. | Cladonia ciliata s. lat. | LC | ||||
| 2025 | Cladonia tenuis var. leucophaea | (Abbayes) Ahti | No | Cladonia ciliata var. ciliata | 372 | LC | ||||
| 2026 | Cladonia tenuis var. tenuis | (Flörke) Harm. | No | Cladonia ciliata var. tenuis | 373 | LC | ||||
| 2027 | Cladonia teuvoana | Pino-Bodas, Burgaz & Aptroot (2024) | Yes | Cladonia teuvoana | 2904 | member of C. cervicornis group | NE NR | |||
| 2028 | Cladonia trassii | Ahti (1998) | Yes | Cladonia trassii | Cladonia stricta auct. brit. | 1590 | VU D2 NR Sc S8 | Cladonia trassii | ||
| 2029 | Cladonia turgida | Hoffm. | No | incorrectly reported from the British Isles | ||||||
| 2030 | 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 |
| 2031 | Cladonia uncialis | auct. brit. p.max.p. | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2032 | Cladonia uncialis subsp. biuncialis | (Hoffm.) M. Choisy (1951) | Yes | Cladonia uncialis subsp. biuncialis | Cladonia uncialis | 426 | LC | Cladonia uncialis subsp. biuncialis | ||
| 2033 | Cladonia uncialis subsp. dicraea | (Ach.) D. Hawksw. | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2034 | Cladonia uncialis subsp. uncialis | (L.) F.H. Wigg. (1780) | Yes | Cladonia uncialis subsp. uncialis | 1594 | NT NS Sc | Cladonia uncialis subsp. uncialis | |||
| 2035 | Cladonia uncialis var. dicraea | (Ach.) Räsänen | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2036 | Cladonia uncinata | Hoffm. (1796) | No | Cladonia uncialis subsp. biuncialis | 426 | LC | ||||
| 2037 | Cladonia verticillata | (Hoffm.) Schaer. (1823) | Yes | Cladonia verticillata | Cladonia cervicornis subsp. verticillata | 370 | LC | Cladonia verticillata | ||
| 2038 | Cladonia verticillata var. cervicornis | (Ach.) Flörke | No | Cladonia cervicornis | 369 | LC | ||||
| 2039 | Cladonia zopfii | Vain. (1920) | Yes | Cladonia zopfii | Cladonia destricta | 427 | LC NS | Cladonia zopfii | ||
| 2040 | Cladoniicola staurospora | Diederich, van den Boom & Aptroot (2001) | Yes | Cladoniicola staurospora | 2553 | LC NR | LF | Cladoniicola staurospora |