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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 8641 | Usnea extensa | Vain. | No | Usnea glabrescens | 1467 | LC NS | ||||
| 8642 | Usnea fibrillosa | Motyka | No | Usnea dasopoga | 1460 | LC | ||||
| 8643 | Usnea filipendula | Stirt. | No | Usnea dasopoga | 1460 | LC | ||||
| 8644 | Usnea flammea | Stirt. (1881) | Yes | Usnea flammea | 1461 | LC | Usnea flammea | |||
| 8645 | Usnea flavocardia | Räsänen (1936) | Yes | Usnea flavocardia | Usnea wirthii | 1731 | DD NR Sc | Usnea flavocardia | ||
| 8646 | Usnea florida | (L.) F.H. Wigg. (1780) | Yes | Usnea florida | 1462 | NT ? P Eng Sc Wa | Usnea florida | |||
| 8647 | Usnea foveata | Vain. | No | incorrectly reported from the British Isles | ||||||
| 8648 | Usnea foveolata | Vain. | No | incorrectly reported from the British Isles | ||||||
| 8649 | Usnea fragilescens | Hav. ex Lynge (1921) | Yes | Usnea fragilescens | Usnea fragilescens var. mollis | 1817 | LC | Usnea fragilescens | ||
| 8650 | Usnea fragilescens var. mollis | (Vain.) P. Clerc (1987) | No | Usnea fragilescens | 1817 | LC | ||||
| 8651 | 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 | |||
| 8652 | Usnea fulvoreagens | (Räsänen) Räsänen (1935) | Yes | Usnea fulvoreagens | 1465 | NE NR? | Usnea fulvoreagens | |||
| 8653 | Usnea glabrata | (Ach.) Vain. (1915) | Yes | Usnea glabrata | 1466 | DD NR Sc IR | Usnea glabrata | |||
| 8654 | Usnea glabrescens | (Nyl. ex Vain.) Vain. (1925) | Yes | Usnea glabrescens | Usnea extensa | 1467 | LC NS | Usnea glabrescens | ||
| 8655 | Usnea glauca | Motyka | No | incorrectly reported from the British Isles | ||||||
| 8656 | Usnea hirta | (L.) F.H. Wigg. (1780) | Yes | Usnea hirta | 1468 | LC | Usnea hirta | |||
| 8657 | Usnea hirta f. hirsutula | Stirt. | No | Usnea subfloridana | 1471 | LC | ||||
| 8658 | Usnea hirta var. comiformis | Motyka ex Räsänen | No | Usnea hirta | 1468 | LC | ||||
| 8659 | Usnea hirta var. minutissima | (Mereschk.) Cretz. | No | Usnea hirta | 1468 | LC | ||||
| 8660 | Usnea hirta var. villosa | (Ach.) Räsänen | No | Usnea hirta | 1468 | LC | ||||
| 8661 | Usnea implicata | (Stirt.) Zahlbr. | No | Usnea baileyi | Usnea baileyi (Stirt.) Zahlbr., incorrectly reported from the British Isles | |||||
| 8662 | Usnea inflata | (Duby) Motyka (1937) | No | Usnea cornuta s. lat. | 1469 | LC | ||||
| 8663 | Usnea intexta | Stirt. (1881) | No | Usnea cornuta s. lat. | 1469 | LC | ||||
| 8664 | Usnea intexta var. constrictula | (Stirt.) D. Hawksw. & D. Chapm. (1972) | Usnea cornuta s. lat. | 1469 | LC | |||||
| 8665 | Usnea lapponica | Vain. | No | incorrectly reported from the British Isles | ||||||
| 8666 | Usnea laricina | auct., ? non Vain. ex Räsänen | No | Usnea glabrescens | 1467 | LC NS | ||||
| 8667 | Usnea madeirensis | Motyka | No | Usnea silesiaca | 1818 | VU D2 NR Sc | ||||
| 8668 | Usnea mollis | Stirt. (1881) nom. illegit. | No | Usnea fragilescens | 1817 | LC | ||||
| 8669 | Usnea monstruosa | auct. brit., non Vain. | No | Usnea dasopoga | 1460 | LC | ||||
| 8670 | Usnea muricata | Motyka | No | Usnea dasopoga | 1460 | LC |