Several names share this combination and are defined under the rules of the botanical code. The species name Usnea flaccida might be an homonymy case.

Usnea flaccida DC.

Botany

Taxonomy

Usnea 2

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 2

Usnea flaccida Hoffm.

Botany

Taxonomy

Usnea 1

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 1