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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 6601 | 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 | |
| 6602 | Placopyrenium canellum | (Nyl.) Gueidan & Cl. Roux (2007) | Yes | Placopyrenium canellum | Verrucaria aspiciliicola Verrucaria canella |
1478 | LC NR | Placopyrenium canellum | ||
| 6603 | Placopyrenium cinereoatratum | (Degel.) Orange (2009) | Yes | Placopyrenium cinereoatratum | 2531 | NE NR | Placopyrenium cinereoatratum | |||
| 6604 | Placopyrenium formosum | Orange (2009) | Yes | Placopyrenium formosum | Verrucaria crustulosa auct. | 2513 | DD NR | Placopyrenium formosum | ||
| 6605 | Placopyrenium fuscellum | (Turner) Gueidan & Cl. Roux (2007) | Yes | Placopyrenium fuscellum | Verrucaria glaucina auct. | 1492 | LC | Placopyrenium fuscellum | ||
| 6606 | Placopyrenium trachyticum | (Hazsl.) Breuss (1987) | Yes | Placopyrenium trachyticum | 2704 | belongs to var. subtrachyticum Breuss (2009), having 1-septate ascospores | NE NR | |||
| 6607 | Placynthiella dasaea | (Stirt.) Tønsberg (1992) | Yes | Placynthiella dasaea | 1735 | LC | Placynthiella dasaea | |||
| 6608 | Placynthiella hyporhoda | (Th. Fr.) Coppins & P. James (1984) | Yes | Placynthiella hyporhoda | 1788 | LC NR M* | Placynthiella hyporhoda | |||
| 6609 | 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 | |
| 6610 | Placynthiella oligotropha | (J.R. Laundon) Coppins & P. James (1984) | Yes | Placynthiella oligotropha | Lecidea oligotropha | 756 | LC NS | Placynthiella oligotropha | ||
| 6611 | Placynthiella uliginosa | (Schrad.) Coppins & P. James (1984) | Yes | Placynthiella uliginosa | Lecidea uliginosa | 788 | LC | Placynthiella uliginosa | ||
| 6612 | Placynthium anemoideum | (Servìt) Gyeln. (1938) | Yes | Placynthium anemoideum | 2522 | DD NR | ||||
| 6613 | Placynthium asperellum | (Ach.) Trevis. (1869) | Yes | Placynthium asperellum | 1134 | NT NR Sc | Placynthium asperellum | |||
| 6614 | Placynthium caesium | (Fr.) Jatta (1900) | Yes | Placynthium caesium | Collolechia caesia; Placynthium garovaglii auct. p.p. | 2435 | DD NR Sc | Placynthium caesium | ||
| 6615 | Placynthium delicatulum | (Th. Fr.) A.L. Sm. | No | Arctomia delicatula | 50 | NT NR Sc | ||||
| 6616 | Placynthium delicatulum | sensu A.L. Sm. p.p. | No | Placynthium dolichoterum | 1141 | DD NR Sc | ||||
| 6617 | Placynthium dolichoterum | (Nyl.) Trevis. (1869) | Yes | Placynthium dolichoterum | Placynthium pluriseptatum | 1141 | DD NR Sc | |||
| 6618 | Placynthium filiforme | (Garov.) M. Choisy | No | incorrectly reported from the British Isles | ||||||
| 6619 | Placynthium flabellosum | (Tuck.) Zahlbr. (1925) | Yes | Placynthium flabellosum | 1135 | LC NS | Placynthium flabellosum | |||
| 6620 | Placynthium garovaglii | auct. p.p. | No | Placynthium caesium | 2435 | DD NR Sc | ||||
| 6621 | Placynthium garovaglii | (A. Massal.) Malme | Yes | Placynthium garovaglii | 1136 | garovaglii is genative of Garovaglius | DD NR | Placynthium garovaglii | ||
| 6622 | Placynthium garovaglioi | (A. Massal.) Malme [orth. var.] | No | Placynthium garovaglii | 1136 | DD NR | ||||
| 6623 | Placynthium hungaricum | Gyeln. (1939) | Yes | Placynthium hungaricum | 2436 | DD NR | Placynthium hungaricum | |||
| 6624 | Placynthium lismorense | (Cromb.) Vain. (1909) | Yes | Placynthium lismorense | 1137 | DD NR Sc | Placynthium lismorense | |||
| 6625 | Placynthium majus | Harm. | No | 1138 | incorrectly reported from the British Isles, BLS number no longer used | |||||
| 6626 | Placynthium nigrum | (Huds.) Gray (1821) | Yes | Placynthium nigrum | 1139 | LC | Placynthium nigrum | |||
| 6627 | Placynthium nigrum f. agglomeratum | Walt. Watson | No | Placynthium nigrum | 1139 | LC | ||||
| 6628 | Placynthium nigrum f. caespiticium | (Wedd.) Walt. Watson (1930) | No | Placynthium nigrum | 1139 | LC | ||||
| 6629 | Placynthium nigrum f. corallinodes | (Schaer.) Walt. Watson (1930) | No | Placynthium nigrum | 1139 | LC | ||||
| 6630 | Placynthium nigrum f. crustaceum | (Hepp) Walt. Watson (1930) | No | Placynthium nigrum | 1139 | LC |