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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6631 | Placodium ferrugineum | (Huds.) Hepp (1870) | No | Blastenia ferruginea s. lat. | 2280 | |||||
| 6632 | Placodium ferrugineum f. ferruginascens | (Nyl.) A.L. Sm. (1918) | No | Rufoplaca arenaria | 235 | LC NS | ||||
| 6633 | Placodium ferrugineum var. festivum | (Ach.) A.L. Sm. (1918) | No | Blastenia crenularia | 253 | LC | ||||
| 6634 | Placodium flavescens | (Huds.) A.L. Sm. (1918) | No | Variospora flavescens | 259 | LC | ||||
| 6635 | Placodium fulgens | (Sw.) DC. (1805) | No | Gyalolechia fulgens | 513 | EN B1+2 NR P Eng Wa | ||||
| 6636 | Placodium fuscoatrum | (Nyl.) A.L. Sm. (1918) | No | Sanguineodiscus aractinus | 234 | VU D2 NR P Eng | ||||
| 6637 | Placodium granulosum | (Müll. Arg.) Hepp (1867) | No | Flavoplaca granulosa | 257 | NT NR | ||||
| 6638 | Placodium granulosum | auct. p.p. | No | Polycauliona verruculifera | 286 | LC | ||||
| 6639 | Placodium haematites | (Chaub. ex St.-Amans) Anzi (1862) | No | Sanguineodiscus haematites | 258 | DD NR | ||||
| 6640 | Placodium incrustans | (DC.) A.L. Sm. | No | Protoblastenia incrustans | 1188 | LC | ||||
| 6641 | Placodium lallavei | auct. brit. p.p., non (Clemente ex Ach.) Anzi | No | Kuettlingeria albolutescens | 2503 | some records may be Caloplaca teicholyta | LC NS | |||
| 6642 | Placodium lallavei | Clemente ex Ach.) Anzi (1862) | No | Kuettlingeria teicholyta | 281 | LC | ||||
| 6643 | Placodium lobulatum | auct. brit. | No | Flavoplaca marina | 267 | LC | ||||
| 6644 | Placodium luteoalbum | (Turner) Anzi (1860) | No | Cerothallia luteoalba | 266 | EN A2, C1 NS P Eng Sc Wa S8 | ||||
| 6645 | Placodium medians | Nyl. | No | Candelariella medians f. medians | 296 | LC | ||||
| 6646 | Placodium microphyllum | sensu Hook. | No | Parmeliella thriptophylla | 1032 | LC Sc L IR | ||||
| 6647 | Placodium microthallinum | (Wedd.) H. Olivier (1897) | No | Flavoplaca microthallina | 268 | LC | ||||
| 6648 | Placodium miniatulum | (Nyl.) H. Olivier (1909) | No | Calogaya oblitterata | 236 | LC | ||||
| 6649 | Placodium murorum | sensu auct. brit. | No | Calogaya pusilla | 277 | LC | ||||
| 6650 | Placodium murorum f. arnoldii | auct. brit. | No | Calogaya oblitterata | 236 | LC | ||||
| 6651 | Placodium murorum f. corticola | (Nyl.) Boistel (1896) | No | Calogaya pusilla | 277 | LC | ||||
| 6652 | Placodium murorum var. miniatum | sensu auct. brit. | No | Calogaya oblitterata | 236 | LC | ||||
| 6653 | Placodium murorum var. pusillum | auct. brit. p.p. | No | Calogaya oblitterata | 236 | LC | ||||
| 6654 | Placodium murorum var. pusillum | auct. brit. p.p. | No | Calogaya pusilla | 277 | LC | ||||
| 6655 | Placodium nivale | (Körb.) Tuck. (1882) | No | Caloplaca nivalis | 269 | CR B, D NR S Sc S8 | ||||
| 6656 | Placodium obliterans | Nyl. (1874) | No | Leproplaca obliterans | 270 | LC NS | ||||
| 6657 | Placodium ochraceum | (Schaer.) Anzi (1860) | No | Xanthocarpia ochracea | 272 | LC NS Sc | ||||
| 6658 | Placodium phaeocarpellum | (Nyl.) A.L. Sm. (1918) | No | Huneckii pollinii | 274 | Synonymy and British status needs further study | Ex | |||
| 6659 | Placodium phloginum | (Ach.) A.L. Sm. (1918) | No | Scythioria phlogina | 2317 | NE ?NS | ||||
| 6660 | Placodium plumbeum | (Lightf.) Hook. | No | Degelia plumbea | 1029 | LC L IR |