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

Polysiphonia fibrillosa (Dillwyn) Grev.

Botany

Taxonomy

Algues 11
Polysiphonia 11

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 11

Polysiphonia fibrillosa Harv.

Botany

Polysiphonia fibrillosa Ag.

Botany

Polysiphonia fibrillosa Grev.

Botany

Taxonomy

Algues 11
Polysiphonia 11

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 11

Polysiphonia fibrillosa (Dillwyn) Grev.

Zoology

Taxonomy

Algues 15
Polysiphonia 15

Specimens registered in collections

Collection Number of specimens (or sets)
Marine Laboratory of Concarneau (CO) 15