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 Sort ascending | Authority | Is Current Name? | Current Taxon Name | Synonyms | BLS Number | Comments | Conservation Evaluation | Group | Account & Map |
|---|---|---|---|---|---|---|---|---|---|---|
| 541 | Usnea cavernosa | Tuck. | No | 1457 | incorrectly reported from the British Isles, BLS number no longer used | |||||
| 542 | Usnea barbata var. plicata | auct. brit. p.p. | No | Usnea ceratina | 1458 | LC Sc | ||||
| 543 | Usnea barbata var. florida | (L.) Fr. | No | Usnea florida | 1462 | Pre c. 1960 usage probably includes other species, esp. U. subfloridana | NT ? P Eng Sc Wa | |||
| 544 | Usnea barbata var. articulata | (L.) Ach. | No | Usnea articulata | 1456 | NT P Eng Wa IR | ||||
| 545 | Usnea barbata | (L.) F.H. Wigg (1780) | Yes | Usnea barbata | 2741 | NE NR | ||||
| 546 | Usnea barbata | auct. brit. p.max.p. | No | Usnea dasopoga | 1460 | LC | ||||
| 547 | Usnea articulata subsp. mediterranea | Motyka | No | Usnea articulata | 1456 | NT P Eng Wa IR | ||||
| 548 | Usnea articulata subsp. intestiniformis | (Ach.) Motyka | No | Usnea articulata | 1456 | NT P Eng Wa IR | ||||
| 549 | Usnea articulata | (L.) Hoffm. (1796) | Yes | Usnea articulata | 1456 | NT P Eng Wa IR | Usnea articulata | |||
| 550 | Usnea arianae | P. Clerc, E. Caviró & A. Gerlach (2020) | Yes | Usnea arianae | 2854 | a member of Usnea cornuta group | NE NR | |||
| 551 | Urceolaria scruposa | (Schreb.) Ach. | No | Diploschistes scruposus | 495 | LC | ||||
| 552 | Urceolaria cyrtaspis | auct. | No | Ionaspis lacustris | 573 | LC | ||||
| 553 | Urceolaria acharii | (Ach.) Ach. (1803) | No | Ionaspis lacustris | 573 | LC | ||||
| 554 | Unguiculariopsis thallophila | (P. Karst.) W.Y. Zhuang (1988) | Yes | Unguiculariopsis thallophila | Scutula cristata Skyttea thallophila |
2260 | LC NS | LF | Unguiculariopsis thallophila | |
| 555 | Unguiculariopsis refractiva | (Coppins) Coppins (1990) | Yes | Unguiculariopsis refractiva | Skyttea refractiva | 2259 | NE NR | LF | Unguiculariopsis refractiva | |
| 556 | Unguiculariopsis manriquei | Etayo (1996) | Yes | Unguiculariopsis manriquei | 1997 | NE NR | LF | Unguiculariopsis manriquei | ||
| 557 | Unguiculariopsis lettaui | (Grummann) Coppins (1990) | Yes | Unguiculariopsis lettaui | Skyttea lettaui | 2258 | LC NS | LF | Unguiculariopsis lettaui | |
| 558 | Unguiculariopsis lesdainii | (Vouaux) Etayo & Diederich (2000) | Yes | Unguiculariopsis lesdainii | 2303 | NE NR | LF | Unguiculariopsis lesdainii | ||
| 559 | Unguiculariopsis groenlandiae | (Alstrup & D. Hawksw.) Etayo & Diederich (2000) | No | Llimoniella groenlandiae | 2105 | NE NR | LF | |||
| 560 | Umbilicaria virginis | Schaer. | No | incorrectly reported from the British Isles | ||||||
| 561 | Umbilicaria vellea | (L.) Hoffm. | No | incorrectly reported from the British Isles | ||||||
| 562 | Umbilicaria varia var. proboscidea f. exasperata | (Turner & Borrer) Leight. | No | Umbilicaria cylindrica | 1446 | LC | ||||
| 563 | Umbilicaria varia var. proboscidea f. denudata | (Turner & Borrer) Leight. | No | Umbilicaria cylindrica | 1446 | LC | ||||
| 564 | Umbilicaria varia var. proboscidea | sensu Leight., non (L.) Leight. | No | Umbilicaria cylindrica | 1446 | LC | ||||
| 565 | Umbilicaria varia var. polyphylla f. sulcata | (Turner & Borrer) Leight. | No | Umbilicaria polyphylla | 1451 | LC | ||||
| 566 | Umbilicaria varia var. polyphylla f. monophylla | Leight. | No | Umbilicaria polyphylla | 1451 | LC | ||||
| 567 | Umbilicaria varia var. polyphylla f. lacera | Leight. | No | Umbilicaria polyphylla | 1451 | LC | ||||
| 568 | Umbilicaria varia var. polyphylla f. congregata | (Turner & Borrer) Leight. | No | Umbilicaria polyphylla | 1451 | LC | ||||
| 569 | Umbilicaria varia var. polyphylla | (L.) Leight. | No | Umbilicaria polyphylla | 1451 | LC | ||||
| 570 | Umbilicaria varia var. hyperborea | (Ach.) Leight. | No | Umbilicaria hyperborea | 1450 | LC NS |