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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6661 | Placodium pyraceum var. pyrithromum | (Ach.) A.L. Sm. (1918) | No | Athallia holocarpa s. lat. | 261 | LC | ||||
| 6662 | Placodium refellens | (Nyl.) A.L. Sm. | No | Caloplaca obscurella | 271 | LC | ||||
| 6663 | Placodium rupestre | (Scop.) Branth & Rostr. | No | Protoblastenia rupestris | 1189 | LC | ||||
| 6664 | Placodium rupestre f. incrustans | (DC.) A.L. Sm. | No | Protoblastenia incrustans | 1188 | LC | ||||
| 6665 | Placodium rupestre var. calvum | (Dicks.) A.L. Sm. | No | Protoblastenia calva | 1186 | LC | ||||
| 6666 | Placodium scopulare | (Nyl.) H. Olivier (1909) | No | Athallia scopularis | 278 | NT NS | ||||
| 6667 | Placodium tetrastichum | (Nyl.) H. Olivier (1918) | No | Xanthocarpia ochracea | 272 | LC NS Sc | ||||
| 6668 | Placodium turnerianum | (Ach.) A.L. Sm. (1918) | No | Kuettlingeria atroflava | 237 | CR D NR P Wa | ||||
| 6669 | Placodium variabile | (Pers.) Hepp (1853) | No | Pyrenodesmia variabilis | 284 | LC | ||||
| 6670 | Placodium variabile var. ecrustaceum | Nyl. (1861) | No | Pyrenodesmia alociza | 233 | LC NS | ||||
| 6671 | Placodium vitellinulum | auct. brit. p.max.p. | No | Caloplaca | several Caloplaca spp. with a yellow thallus, name or specific epithet valid but has been misused in the past | |||||
| 6672 | Placodium xantholytum | (Nyl.) Nyl. (1896) | No | Leproplaca xantholyta | 826 | LC | ||||
| 6673 | Placopsis gelida | auct. brit. p.max.p. | No | Placopsis lambii | 1723 | name or specific epithet valid but has been misused in the past | LC M* | |||
| 6674 | Placopsis gelida | (L.) Linds. (1866) | Yes | Placopsis gelida | 1133 | most records refer to P. lambii | DD NS | Placopsis gelida | ||
| 6675 | Placopsis lambii | Hertel & V. Wirth (1987) | Yes | Placopsis lambii | Placopsis gelida auct. p.p. | 1723 | often mis-recorded as P. gelida | LC M* | Placopsis lambii | |
| 6676 | Placopyrenium canellum | (Nyl.) Gueidan & Cl. Roux (2007) | Yes | Placopyrenium canellum | Verrucaria aspiciliicola Verrucaria canella |
1478 | LC NR | Placopyrenium canellum | ||
| 6677 | Placopyrenium cinereoatratum | (Degel.) Orange (2009) | Yes | Placopyrenium cinereoatratum | 2531 | NE NR | Placopyrenium cinereoatratum | |||
| 6678 | Placopyrenium formosum | Orange (2009) | Yes | Placopyrenium formosum | Verrucaria crustulosa auct. | 2513 | DD NR | Placopyrenium formosum | ||
| 6679 | Placopyrenium fuscellum | (Turner) Gueidan & Cl. Roux (2007) | Yes | Placopyrenium fuscellum | Verrucaria glaucina auct. | 1492 | LC | Placopyrenium fuscellum | ||
| 6680 | Placopyrenium trachyticum | (Hazsl.) Breuss (1987) | Yes | Placopyrenium trachyticum | 2704 | belongs to var. subtrachyticum Breuss (2009), having 1-septate ascospores | NE NR | Placopyrenium trachyticum | ||
| 6681 | Placynthiella dasaea | (Stirt.) Tønsberg (1992) | Yes | Placynthiella dasaea | 1735 | LC | Placynthiella dasaea | |||
| 6682 | Placynthiella hyporhoda | (Th. Fr.) Coppins & P. James (1984) | Yes | Placynthiella hyporhoda | 1788 | LC NR M* | Placynthiella hyporhoda | |||
| 6683 | Placynthiella icmalea | (Ach.) Coppins & P. James (1984) | Yes | Placynthiella icmalea | Lecidea fuliginea Lecidea icmalea Lecidea uliginosa auct. p.p. |
732 | pre-1980 often reported as Lecidea uliginosa | LC | Placynthiella icmalea | |
| 6684 | Placynthiella oligotropha | (J.R. Laundon) Coppins & P. James (1984) | Yes | Placynthiella oligotropha | Lecidea oligotropha | 756 | LC NS | Placynthiella oligotropha | ||
| 6685 | Placynthiella uliginosa | (Schrad.) Coppins & P. James (1984) | Yes | Placynthiella uliginosa | Lecidea uliginosa | 788 | LC | Placynthiella uliginosa | ||
| 6686 | Placynthium anemoideum | (Servìt) Gyeln. (1938) | Yes | Placynthium anemoideum | 2522 | DD NR | Placynthium anemoideum | |||
| 6687 | Placynthium asperellum | (Ach.) Trevis. (1869) | Yes | Placynthium asperellum | 1134 | NT NR Sc | Placynthium asperellum | |||
| 6688 | Placynthium caesium | (Fr.) Jatta (1900) | Yes | Placynthium caesium | Collolechia caesia; Placynthium garovaglii auct. p.p. | 2435 | DD NR Sc | Placynthium caesium | ||
| 6689 | Placynthium delicatulum | (Th. Fr.) A.L. Sm. | No | Arctomia delicatula | 50 | NT NR Sc | ||||
| 6690 | Placynthium delicatulum | sensu A.L. Sm. p.p. | No | Placynthium dolichoterum | 1141 | DD NR Sc |