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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2281 | Coppinsiella ulcerosa | (Coppins & P.James) S.Y. Kondr. & Lőkös (2018) | Yes | Coppinsiella ulcerosa | Caloplaca ulcerosa | 283 | LC | Coppinsiella ulcerosa | ||
| 2282 | Coriscium viride | (Ach.) Vain. (1890) | No | Lichenomphalia hudsoniana | 934 | |||||
| 2283 | Cornicularia aculeata | (Schreb.) Ach. (1803) | No | Cetraria aculeata | 430 | LC | ||||
| 2284 | Cornicularia aculeata var. sorediata | (Du Rietz) Du Rietz (1926) | No | Taeniolella rolfii | 2327 | Cetraria aculeata parasitized by Taeniolella rolfii {LF} | NE NR | |||
| 2285 | Cornicularia bicolor | (Ehrh.) Ach. | No | Bryoria bicolor | 188 | LC NS | ||||
| 2286 | Cornicularia heteromalla | (Sm.) Hook. (1844) | No | application uncertain | ||||||
| 2287 | Cornicularia lanata | auct. | No | Pseudephebe pubescens | 1191 | LC | ||||
| 2288 | Cornicularia muricata | (Ach.) Ach. | No | Cetraria muricata | 431 | LC | ||||
| 2289 | Cornicularia normoerica | (Gunnerus) Du Rietz (1926) | Yes | Cornicularia normoerica | Cornicularia tristis | 472 | LC | Cornicularia normoerica | ||
| 2290 | Cornicularia pubescens | auct. p.p. | No | Ephebe lanata | 509 | LC | ||||
| 2291 | Cornicularia pubescens | (L.) Ach. | No | Pseudephebe pubescens | 1191 | LC | ||||
| 2292 | Cornicularia tristis | (Weber) Hoffm. | No | Cornicularia normoerica | 472 | LC | ||||
| 2293 | Cornutispora ciliata | Kalb (1993) | No | Spirographa ciliata | 2035 | NE NR | LF | |||
| 2294 | Cornutispora lichenicola | D. Hawksw. & B. Sutton (1976) | No | Spirographa lichenicola | 2036 | LC | LF | |||
| 2295 | Cornutispora pyramidalis | Etayo (2010) | No | Spirographa pyramidalis | 2764 | NE NR | LF | |||
| 2296 | Cornutispora triangularis | Diederich & Etayo (1995) | No | Spirographa triangularis | 2324 | NE NR | LF | |||
| 2297 | Cornutispora tricupulata | F. Berger & E. Zimm. (2018) | No | Spirographa tricupulata | 2800 | NE NR | LF | |||
| 2298 | Corticifraga fuckelii | (Rehm) D. Hawksw. & R. Sant. (1990) | Yes | Corticifraga fuckelii | Phragmonaevia fuckelii | 2037 | LC NS | LF | Corticifraga fuckelii | |
| 2299 | Corticifraga peltigerae | (Fuckel) D. Hawksw. & R. Sant. (1990) | Yes | Corticifraga peltigerae | Phragmonaevia peltigerae | 2038 | LC NS | LF | Corticifraga peltigerae | |
| 2300 | Corticiruptor abeloneae | (P.M. Jørg.) Wedin & Hafellner (1998) | Yes | Corticiruptor abeloneae | Arthonia abelonae | 1915 | NT NR | LF | Corticiruptor abeloneae | |
| 2301 | Corticium arachnoideum | Berk. | No | Athelia arachnoidea | 2015 | LC | LF | |||
| 2302 | Corticium centrifugum | sensu Bres. | No | Athelia arachnoidea | 2015 | LC | LF | |||
| 2303 | Courtoisia candelaris | (L.) L. Marchand (1830) | No | Chrysothrix candelaris | 354 | LC | ||||
| 2304 | Cresponea premnea | (Ach.) Egea & Torrente (1993) | Yes | Cresponea premnea | Lecanactis premnea Cresponea premnea var. saxicola Lecanactis plocina |
605 | LC Sc IR | Cresponea premnea | ||
| 2305 | Cresponea premnea var. saxicola | (Mudd) Egea & Torrente | No | Cresponea premnea | 605 | Cresponea premnea [on rock] | LC Sc IR | |||
| 2306 | Cresporhaphis wienkampii | (J. Lahm ex Hazsl.) M.B. Aguirre (1991) | No | Leptosillia wienkampii | 1284 | LC NR | ||||
| 2307 | Cresporhapis ulmi | Calatayud & M.B. Aguirre (2001) | No | Leptosillia slaptonensis | 2869 | NE NR | F | |||
| 2308 | Crittendenia absistentis | Diederich, Coppins & Millanes (2022) | Yes | Crittendenia absistentis | 2815 | on Bacidia absistens | NE NR | LF | Crittendenia absistentis | |
| 2309 | Crittendenia coppinsii | (P. Roberts) Diederich, M. Westb., Millanes & Wedin (2021) | Yes | Crittendenia coppinsii | Chionosphaera coppinsii | 2031 | NE NR | LF | Crittendenia coppinsii | |
| 2310 | Crittendenia lecidellae | Diederich, Etayo & Millanes (2022) | Yes | Crittendenia lecidellae | 2816 | on Lecidella elaeochroma | NE NR | LF | Crittendenia lecidellae |