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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6571 | Placodium murorum var. pusillum | auct. brit. p.p. | No | Caloplaca arnoldii subsp. oblitterata | 236 | LC | ||||
| 6572 | Placodium murorum var. pusillum | auct. brit. p.p. | No | Caloplaca saxicola | 277 | LC | ||||
| 6573 | Placodium nivale | (Körb.) Tuck. (1882) | No | Caloplaca nivalis | 269 | CR B, D NR S Sc S8 | ||||
| 6574 | Placodium obliterans | Nyl. | No | Caloplaca obliterans | 270 | LC NS | ||||
| 6575 | Placodium ochraceum | (Schaer.) Anzi | No | Caloplaca ochracea | 272 | LC NS Sc | ||||
| 6576 | Placodium phaeocarpellum | (Nyl.) A.L. Sm. | No | Caloplaca pollinii | 274 | Ex | ||||
| 6577 | Placodium phloginum | (Ach.) A.L. Sm. | No | Caloplaca phlogina | 2317 | NE ?NS | ||||
| 6578 | Placodium plumbeum | (Lightf.) Hook. | No | Degelia plumbea | 1029 | LC L IR | ||||
| 6579 | Placodium pollinii | (A. Massal.) A.L. Sm. | No | Caloplaca pollinii | 274 | Ex | ||||
| 6580 | Placodium pusillum | auct. brit. | No | Caloplaca arnoldii subsp. oblitterata | 236 | LC | ||||
| 6581 | Placodium pusillum | auct. brit. | No | Caloplaca saxicola | 277 | LC | ||||
| 6582 | Placodium pyraceum | auct. p.p., non (Ach.) Anzi | No | Caloplaca holocarpa s. lat. | 261 | name or specific epithet valid but has been misused in the past | LC | |||
| 6583 | Placodium pyraceum | auct. p.p., non (Ach.) Anzi | No | Caloplaca oasis | 2461 | name or specific epithet valid but has been misused in the past | LC | |||
| 6584 | Placodium pyraceum f. pictum | (Taylor) A.L. Sm. | No | Caloplaca holocarpa s. lat. | 261 | LC | ||||
| 6585 | Placodium pyraceum var. holocarpum | (Hoffm.) Anzi | No | Caloplaca holocarpa s. lat. | 261 | LC | ||||
| 6586 | Placodium pyraceum var. lacteum | auct. brit. non (A. Massal.) A.L. Sm. | No | Caloplaca marmorata | 264 | LC | ||||
| 6587 | Placodium pyraceum var. pyrithromum | (Ach.) A.L. Sm. | No | Caloplaca holocarpa s. lat. | 261 | LC | ||||
| 6588 | Placodium refellens | (Nyl.) A.L. Sm. | No | Caloplaca obscurella | 271 | LC | ||||
| 6589 | Placodium rupestre | (Scop.) Branth & Rostr. | No | Protoblastenia rupestris | 1189 | LC | ||||
| 6590 | Placodium rupestre f. incrustans | (DC.) A.L. Sm. | No | Protoblastenia incrustans | 1188 | LC | ||||
| 6591 | Placodium rupestre var. calvum | (Dicks.) A.L. Sm. | No | Protoblastenia calva | 1186 | LC | ||||
| 6592 | Placodium scopulare | (Nyl.) H. Olivier | No | Caloplaca scopularis | 278 | NT NS | ||||
| 6593 | Placodium tetrastichum | (Nyl.) H. Olivier | No | Caloplaca ochracea | 272 | LC NS Sc | ||||
| 6594 | Placodium turnerianum | (Ach.) A.L. Sm. | No | Caloplaca atroflava | 237 | CR D NR P Wa | ||||
| 6595 | Placodium variabile | (Pers.) Hepp | No | Caloplaca variabilis | 284 | LC | ||||
| 6596 | Placodium variabile var. ecrustaceum | (Nyl.) Nyl. | No | Caloplaca alociza | 233 | LC NS | ||||
| 6597 | 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 | |||||
| 6598 | Placodium xantholytum | (Nyl.) Nyl. | No | Caloplaca xantholyta | 826 | LC | ||||
| 6599 | 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* | |||
| 6600 | Placopsis gelida | (L.) Linds. (1866) | Yes | Placopsis gelida | 1133 | most records refer to P. lambii | DD NS | Placopsis gelida |