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 comosa var. similis | (Motyka) Erichsen | No | Usnea subfloridana | 1471 | LC | ||||
| 8642 | Usnea comosa var. sordidula | (Motyka) H. Magn. | No | Usnea subfloridana | 1471 | LC | ||||
| 8643 | Usnea compacta | auct. brit., non (Räsänen) Motyka | No | Usnea subfloridana | 1471 | LC | ||||
| 8644 | Usnea constrictula | Stirt. (1881) | No | Usnea cornuta s. lat. | 1469 | LC | ||||
| 8645 | Usnea cornuta s. lat. | Yes | Usnea cornuta s. lat. | Usnea ceratina var. incurvescens; Usnea inflata; Usnea intexta; Usnea intexta var. constrictula | 1469 | LC | Usnea cornuta s. lat. | |||
| 8646 | Usnea cornuta s. str. | Körb. (1865) | Yes | Usnea cornuta s. str. | 2855 | NE | Usnea cornuta s. str. | |||
| 8647 | Usnea dasaea | Stirt. (1881) | No | Usnea cornuta s. lat. | 1469 | LC | ||||
| 8648 | Usnea dasopoga | (Ach.) Nyl. (1876) | Yes | Usnea dasopoga | Usnea chaetophora; Usnea dasypoga; Usnea filipendula | 1460 | LC | Usnea dasopoga | ||
| 8649 | Usnea dasypoga | (Ach.) Nyl. (1876) [orth. error] | No | Usnea dasopoga | 1460 | LC | ||||
| 8650 | Usnea diplotypa | Vain. | No | incorrectly reported from the British Isles | ||||||
| 8651 | Usnea distincta | auct. brit., non Motyka | No | Usnea subfloridana | 1471 | LC | ||||
| 8652 | Usnea esperantiana | P. Clerc (1992) | Yes | Usnea esperantiana | Usnea fulvoreagens auct. p.p. | 1816 | NT NR Sc IR | Usnea esperantiana | ||
| 8653 | Usnea extensa | Vain. | No | Usnea glabrescens | 1467 | LC NS | ||||
| 8654 | Usnea fibrillosa | Motyka | No | Usnea dasopoga | 1460 | LC | ||||
| 8655 | Usnea filipendula | Stirt. | No | Usnea dasopoga | 1460 | LC | ||||
| 8656 | Usnea flammea | Stirt. (1881) | Yes | Usnea flammea | 1461 | LC | Usnea flammea | |||
| 8657 | Usnea flavocardia | Räsänen (1936) | Yes | Usnea flavocardia | Usnea wirthii | 1731 | DD NR Sc | Usnea flavocardia | ||
| 8658 | Usnea florida | (L.) F.H. Wigg. (1780) | Yes | Usnea florida | 1462 | NT ? P Eng Sc Wa | Usnea florida | |||
| 8659 | Usnea foveata | Vain. | No | incorrectly reported from the British Isles | ||||||
| 8660 | Usnea foveolata | Vain. | No | incorrectly reported from the British Isles | ||||||
| 8661 | Usnea fragilescens | Hav. ex Lynge (1921) | Yes | Usnea fragilescens | Usnea fragilescens var. mollis | 1817 | LC | Usnea fragilescens | ||
| 8662 | Usnea fragilescens var. mollis | (Vain.) P. Clerc (1987) | No | Usnea fragilescens | 1817 | LC | ||||
| 8663 | 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 | |||
| 8664 | Usnea fulvoreagens | (Räsänen) Räsänen (1935) | Yes | Usnea fulvoreagens | 1465 | NE NR? | Usnea fulvoreagens | |||
| 8665 | Usnea glabrata | (Ach.) Vain. (1915) | Yes | Usnea glabrata | 1466 | DD NR Sc IR | Usnea glabrata | |||
| 8666 | Usnea glabrescens | (Nyl. ex Vain.) Vain. (1925) | Yes | Usnea glabrescens | Usnea extensa | 1467 | LC NS | Usnea glabrescens | ||
| 8667 | Usnea glauca | Motyka | No | incorrectly reported from the British Isles | ||||||
| 8668 | Usnea hirta | (L.) F.H. Wigg. (1780) | Yes | Usnea hirta | 1468 | LC | Usnea hirta | |||
| 8669 | Usnea hirta f. hirsutula | Stirt. | No | Usnea subfloridana | 1471 | LC | ||||
| 8670 | Usnea hirta var. comiformis | Motyka ex Räsänen | No | Usnea hirta | 1468 | LC |