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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1921 | Cladonia gonecha | (Ach.) Asahina | No | Cladonia sulphurina | 423 | LC | ||||
| 1922 | Cladonia gracilis | (L.) Willd. (1787) | Yes | Cladonia gracilis | 392 | LC | Cladonia gracilis | |||
| 1923 | Cladonia gracilis f. incondita | Wallr.) Kovář (1912) | No | Cladonia gracilis | 392 | LC | ||||
| 1924 | Cladonia gracilis var. chordalis | (Flörke) Schaer. (1823) | No | Cladonia gracilis | 392 | LC | ||||
| 1925 | Cladonia grayi s. lat. | Yes | Cladonia grayi s. lat. | 2810 | Species aggregate excluding Cladonia chlorophaea s. str. | NE | Cladonia grayi s. lat. | |||
| 1926 | Cladonia grayi s. str. | G. Merr. ex Sandst. (1929) | Yes | Cladonia grayi s. str. | 393 | NE NR | Cladonia grayi s. str. | |||
| 1927 | Cladonia humilis | (With.) J.R. Laundon (1984) | Yes | Cladonia humilis | Cladonia conista auct. p.p. Cladonia conistea Cladonia conoidea |
376 | LC | Cladonia humilis | ||
| 1928 | Cladonia humilis var. bourgeanica | A.W. Archer | No | Cladonia conista | 156 | NE NR | ||||
| 1929 | Cladonia impexa | Harm. | No | Cladonia portentosa | 409 | LC | ||||
| 1930 | Cladonia impexa f. laxiuscula | sensu auct. brit. | No | Cladonia portentosa | 409 | LC | ||||
| 1931 | Cladonia impexa subsp. laxiuscula | sensu auct. brit. | Cladonia portentosa | 409 | LC | |||||
| 1932 | Cladonia incrassata | Flörke (1826) | Yes | Cladonia incrassata | 394 | LC NS | Cladonia incrassata | |||
| 1933 | Cladonia innominata | Lendemer (2008) | No | Cladonia conista | 156 | NE NR | ||||
| 1934 | Cladonia lamarkii | Nyl. | No | Cladonia ramulosa | 359 | LC | ||||
| 1935 | Cladonia lamarkii f. isignyi | (Delise) Nyl. | No | Cladonia ramulosa | 359 | LC | ||||
| 1936 | Cladonia lepidota | auct. brit. p.max.p. | No | Cladonia subcervicornis | 421 | LC | ||||
| 1937 | Cladonia leptophylla | (Ach.) Flörke | No | Cladonia peziziformis | 365 | CR A NR P Eng Sc Wa | ||||
| 1938 | Cladonia leucophaea | Abbayes | No | Cladonia ciliata var. ciliata | 372 | LC | ||||
| 1939 | Cladonia luteoalba | Wheldon & A. Wilson (1907) | Yes | Cladonia luteoalba | 395 | LC | Cladonia luteoalba | |||
| 1940 | Cladonia macilenta | Hoffm. (1796) | Yes | Cladonia macilenta | Cladonia bacillaris | 396 | LC | Cladonia macilenta | ||
| 1941 | Cladonia macilenta subsp. floerkeana | (Fr.) V. Wirth | No | Cladonia floerkeana | 386 | LC | ||||
| 1942 | Cladonia macilenta var. scabrosa | (Mudd) Cromb. | No | Cladonia macilenta | 396 | LC | ||||
| 1943 | Cladonia macilenta var. squamigera | Vain. (1887) | No | Cladonia macilenta | 396 | LC | ||||
| 1944 | Cladonia macrophylla | (Schaer.) Stenh. (1865) | Yes | Cladonia macrophylla | Cladonia alpicola | 397 | LC NS | Cladonia macrophylla | ||
| 1945 | Cladonia macrophyllodes | auct. brit. | No | Cladonia subcervicornis | 421 | LC | ||||
| 1946 | Cladonia macrophyllodes | Nyl. | No | incorrectly reported from the British Isles | ||||||
| 1947 | Cladonia major | (K.G. Hagen) Sandst. (1927) | No | Cladonia fimbriata | 384 | LC | ||||
| 1948 | Cladonia maxima | (Asahina) Ahti (1978) | Yes | Cladonia maxima | Cladonia ecmocyna auct. brit.; Cladonia elongata auct. brit. | 398 | VU D2 NR Sc | Cladonia maxima | ||
| 1949 | Cladonia mediterranea | P.A. Duvign. & Abbayes (1947) | Yes | Cladonia mediterranea | Cladina mediterranea | 399 | CR D NR P Eng | Cladonia mediterranea | ||
| 1950 | Cladonia merochlorophaea | Asahina (1940) | Yes | Cladonia merochlorophaea | 400 | a member of the C. grayi complex | LC NS | Cladonia merochlorophaea |