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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 4831 | Lichen coeruleonigricans | auct. | No | Thalloidima sedifolium | 1416 | LC P Eng Wa | ||||
| 4832 | Lichen compositus | With. | No | Arthonia varians | 714 | Lecanora rupicola parasitized by Arthonia varians {LF} [name not typified] | LC NS | |||
| 4833 | Lichen conspurcatus | Sm. (1801) p.p. | No | Dirina massiliensis f. sorediata | 500 | LC | ||||
| 4834 | Lichen conspurcatus | Sm. (1801) p.p. | No | unidentified hyphomycete on Dirina massiliensis f. sorediata | LF | |||||
| 4835 | Lichen corallinus | L. | No | Lepra corallina | 1066 | LC | ||||
| 4836 | Lichen corneus | With. (1796) | No | Cliostomum griffithii | 429 | LC | ||||
| 4837 | Lichen corneus | With. (1776) | No | Umbilicaria cylindrica | 1446 | LC | ||||
| 4838 | Lichen cornigerus | With. | No | Cladonia subulata | 422 | LC | ||||
| 4839 | Lichen cornucopioides | auct. brit. p.p. | No | Cladonia verticillata | 370 | LC | ||||
| 4840 | Lichen cornucopioides | auct. brit. p.p. | No | Cladonia coccifera s. lat. | 374 | |||||
| 4841 | Lichen cornutus | L. | No | Cladonia cornuta | 378 | LC | ||||
| 4842 | Lichen corrugatus | Sm. | No | Pleurosticta acetabulum | 982 | LC | ||||
| 4843 | Lichen corynellus | Ach. | No | Calicium corynellum | 224 | CR A, B, D NR P Eng Sc | ||||
| 4844 | Lichen crassus | Huds. | No | Squamarina cartilaginea | 1337 | LC | ||||
| 4845 | Lichen crenularius | With. (1776) | No | Blastenia crenularia | 253 | LC | ||||
| 4846 | Lichen crenulatus | Dicks., non With. | No | Myriolecis crenulata | 644 | LC | ||||
| 4847 | Lichen crenulatus | With. | No | Pannaria rubiginosa | 980 | LC Sc L IR | ||||
| 4848 | Lichen cretaceus | Sm. (1800) | No | Scytinium biatorinum | 827 | ? Leptogium biatorinum | LC NS Sc | |||
| 4849 | Lichen crinitus | Lightf. | No | Umbilicaria cylindrica | 1446 | LC | ||||
| 4850 | Lichen crispus | Huds. (1762) | No | Blennothallia crispa | 440 | LC | ||||
| 4851 | Lichen cristatus | L. (1753) | No | Lathagrium cristatum | 442 | LC | ||||
| 4852 | Lichen cristatus | sensu Huds. et sensu Sm. | No | Enchylium tenax var. tenax | 459 | LC | ||||
| 4853 | Lichen crocatus | auct. brit. | No | Pseudocyphellaria citrina | 1195 | LC Sc IR | ||||
| 4854 | Lichen croceus | L. | No | Solorina crocea | 1329 | LC NS | ||||
| 4855 | Lichen cycloselis | Ach. | No | Phaeophyscia orbicularis | 1107 | LC | ||||
| 4856 | Lichen cylindricus | L. | No | Umbilicaria cylindrica | 1446 | LC | ||||
| 4857 | Lichen daedaleus | Sm. | No | Pyxine sorediata | Pyxine sorediata (Ach.) Mont., incorrectly reported from the British Isles | |||||
| 4858 | Lichen debilis | Sm. | No | Chaenothecopsis debilis | 778 | Ex | F | |||
| 4859 | Lichen deustus | L. | No | Umbilicaria deusta | 1447 | LC NS | ||||
| 4860 | Lichen deustus | Lightf., non L. | No | Umbilicaria proboscidea | 1453 | LC |