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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1531 | Caloplaca scopularis | (Nyl.) Lettau (1912) | No | Athallia scopularis | 278 | NT NS | ||||
| 1532 | Caloplaca sol | Orange (2018) | No | Flavoplaca sol | 2707 | NE NR | ||||
| 1533 | Caloplaca soralifera | Vondrák & Hrouzek (2006) | No | Kuettlingeria soralifera | 2460 | DD NR | ||||
| 1534 | Caloplaca sorediella | Arup (2006) | No | Haloplaca sorediella | 2459 | LC NR | ||||
| 1535 | Caloplaca sterilis | Šoun, Khodos. & Vondrák (2011) | Yes | Caloplaca sterilis | 2914 | NE NR | Caloplaca sterilis | |||
| 1536 | Caloplaca stillicidiorum | (Vahl) Lynge (1921) | Yes | Caloplaca stillicidiorum | 1991 | LC NS | Caloplaca stillicidiorum | |||
| 1537 | Caloplaca suaedae | O.L. Gilbert & Coppins (2001) | No | Haloplaca suaedae | 2321 | NT NR IR | ||||
| 1538 | Caloplaca subpallida | H. Magn. (1945) | No | Rufoplaca subpallida | 2895 | some records probably refer to Rufoplaca arenaria | NE | |||
| 1539 | Caloplaca teicholyta | auct. brit. p.p. [mainly records from northern Britain] | No | Kuettlingeria albolutescens | 2503 | name or specific epithet valid but has been misused in the past | LC NS | |||
| 1540 | Caloplaca teicholyta | (Ach.) J. Steiner (1895) | No | Kuettlingeria teicholyta | 281 | LC | ||||
| 1541 | Caloplaca tetrasticha | (Nyl.) H. Olivier (1909) | No | Xanthocarpia ochracea | 272 | LC NS Sc | ||||
| 1542 | Caloplaca thallincola | (Wedd.) Du Rietz (1921) | No | Variospora thallincola | 282 | LC | ||||
| 1543 | Caloplaca turkuensis | (Vain.) Zahlbr. (1931) | Yes | Caloplaca turkuensis | 2574 | Caloplaca turkuensis | ||||
| 1544 | Caloplaca turneriana | (Ach.) H. Olivier (1909) | No | Kuettlingeria atroflava | 237 | CR D NR P Wa | ||||
| 1545 | Caloplaca ulcerosa | Coppins & P. James (1979) | No | Coppinsiella ulcerosa | 283 | LC | ||||
| 1546 | Caloplaca variabilis | (Pers.) Müll. Arg. (1862) | No | Pyrenodesmia variabilis | 284 | LC | ||||
| 1547 | Caloplaca variabilis f. acrustacea | Müll. Arg. (1862) | No | Pyrenodesmia alociza | 233 | LC NS | ||||
| 1548 | Caloplaca velana | sensu auct. brit. | No | Flavoplaca itiana | 285 | LC | ||||
| 1549 | Caloplaca verruculifera | (Vain.) Zahlbr. (1931) | No | Polycauliona verruculifera | 286 | LC | ||||
| 1550 | Caloplaca virescens | (Sm.) Coppins (1980) | Yes | Caloplaca virescens | 287 | EN A, C, D NS P Eng Sc | Caloplaca virescens | |||
| 1551 | Caloplaca viridirufa | auct. brit. | No | Sanguineodiscus aractinus | 234 | VU D2 NR P Eng | ||||
| 1552 | Caloplaca vitellinula | auct. p.max.p. | No | Caloplaca | several Caloplaca spp. with a yellow thallus, name or specific epithet valid but has been misused in the past | |||||
| 1553 | Caloplaca vitellinula | (Nyl.) H. Olivier (1897) | No | Athallia vitellinula | 2532 | NE NR | ||||
| 1554 | Caloplaca xantholyta | (Nyl.) Jatta (1902) | No | Leproplaca xantholyta | 826 | LC | ||||
| 1555 | Calothrix interrupta | Carmich. ex Hook., comb. inval., p.p. | No | Dictyonema coppinsii | 488 | DD NR Sc | ||||
| 1556 | Calvitimela aglaea | (Sommerf.) Hafellner (2001) | Yes | Calvitimela aglaea | Lecidea aglaea Tephromela aglaea |
693 | LC NS | Calvitimela aglaea | ||
| 1557 | Calvitimela armeniaca | (DC.) Hafellner (2001) | Yes | Calvitimela armeniaca | Lecidea armeniaca Tephromela armeniaca |
697 | LC NR Sc | Calvitimela armeniaca | ||
| 1558 | Calycina alstrupii | Suija & Motiej. (2017) | No | Calycina lobariae | 2696 | NE NR | LF | |||
| 1559 | Calycina lobariae | (Etayo) Suija & Jonsson (2025) | Yes | Calycina lobariae | Calycina alstrupii | 2696 | on Lobaria pulmonaria | NE NR | LF | Calycina lobariae |
| 1560 | Candelaria concolor | (Dicks.) Stein (1879) | Yes | Candelaria concolor | 289 | LC | Candelaria concolor |