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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 481 | Usnea rupestris | Motyka | No | Usnea flammea | 1461 | LC | ||||
| 482 | Usnea rubiginosa | auct. | No | Usnea rubicunda | 1470 | LC | ||||
| 483 | Usnea rubiginea | auct. brit., non (Michx.) A. Massal. | No | Usnea rubicunda | 1470 | LC | ||||
| 484 | Usnea rubicunda | Stirt. (1881) | Yes | Usnea rubicunda | Usnea rubiginea Usnea rubiginosa |
1470 | LC | Usnea rubicunda | ||
| 485 | Usnea protensa | Stirt. | No | Usnea rubicunda | 1470 | LC | ||||
| 486 | Usnea praetervisa | (Asahina) P. Clerc (2004) | Yes | Usnea praetervisa | 2743 | NE NR | ||||
| 487 | Usnea plicata var. comosa | (Ach.) Ach. | No | Usnea subfloridana | 1471 | LC | ||||
| 488 | Usnea plicata | auct. brit. p.p. | No | Usnea ceratina | 1458 | LC Sc | ||||
| 489 | Usnea plicata | auct. brit. p.p. | No | Usnea rubicunda | 1470 | LC | ||||
| 490 | Usnea perplexans | Stirt. (1881) | Yes | Usnea perplexans | 2742 | NE NR | ||||
| 491 | Usnea pendulina | Motyka | No | incorrectly reported from the British Isles | ||||||
| 492 | Usnea muricata | Motyka | No | Usnea dasopoga | 1460 | LC | ||||
| 493 | Usnea monstruosa | auct. brit., non Vain. | No | Usnea dasopoga | 1460 | LC | ||||
| 494 | Usnea mollis | Stirt. (1881) nom. illegit. | No | Usnea fragilescens | 1817 | LC | ||||
| 495 | Usnea madeirensis | Motyka | No | Usnea silesiaca | 1818 | VU D2 NR Sc | ||||
| 496 | Usnea laricina | auct., ? non Vain. ex Räsänen | No | Usnea glabrescens | 1467 | LC NS | ||||
| 497 | Usnea lapponica | Vain. | No | incorrectly reported from the British Isles | ||||||
| 498 | Usnea intexta var. constrictula | (Stirt.) D. Hawksw. & D. Chapm. (1972) | Usnea cornuta s. lat. | 1469 | LC | |||||
| 499 | Usnea intexta | Stirt. (1881) | No | Usnea cornuta s. lat. | 1469 | LC | ||||
| 500 | Usnea inflata | (Duby) Motyka (1937) | No | Usnea cornuta s. lat. | 1469 | LC | ||||
| 501 | Usnea implicata | (Stirt.) Zahlbr. | No | Usnea baileyi | Usnea baileyi (Stirt.) Zahlbr., incorrectly reported from the British Isles | |||||
| 502 | Usnea hirta var. villosa | (Ach.) Räsänen | No | Usnea hirta | 1468 | LC | ||||
| 503 | Usnea hirta var. minutissima | (Mereschk.) Cretz. | No | Usnea hirta | 1468 | LC | ||||
| 504 | Usnea hirta var. comiformis | Motyka ex Räsänen | No | Usnea hirta | 1468 | LC | ||||
| 505 | Usnea hirta f. hirsutula | Stirt. | No | Usnea subfloridana | 1471 | LC | ||||
| 506 | Usnea hirta | (L.) F.H. Wigg. (1780) | Yes | Usnea hirta | 1468 | LC | Usnea hirta | |||
| 507 | Usnea glauca | Motyka | No | incorrectly reported from the British Isles | ||||||
| 508 | Usnea glabrescens | (Nyl. ex Vain.) Vain. (1925) | Yes | Usnea glabrescens | Usnea extensa | 1467 | LC NS | Usnea glabrescens | ||
| 509 | Usnea glabrata | (Ach.) Vain. (1915) | Yes | Usnea glabrata | 1466 | DD NR Sc IR | Usnea glabrata | |||
| 510 | Usnea fulvoreagens | auct. brit. p.p., non (Räsänen) Räsänen | No | Usnea esperantiana | 1816 | name or specific epithet valid but has been misused in the past | NT NR Sc IR |