Several names share this combination and are defined under the rules of the botanical code. The species name Polysiphonia foeniculacea might be an homonymy case.
The name Polysiphonia foeniculacea is a slight homonymy case. This name is used according to the rules of several different nomenclatural codes.

Polysiphonia foeniculacea Ag.

Botany

Taxonomy

Algues 9
Polysiphonia 9

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogames (PC) 9

Polysiphonia foeniculacea (C. Agardh) Sprengel

Botany

Polysiphonia foeniculacea J.Agardh

Botany

Taxonomy

Algues 4
Polysiphonia 4

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogames (PC) 4

Polysiphonia foeniculacea (C. Agardh) J. Agardh

Zoology

Taxonomy

Polysiphonia 1

Specimens registered in collections

Collection Number of specimens (or sets)
Laboratoire Maritime de Concarneau (CO) 1