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

Polysiphonia atrorubescens (Dillwyn) Grev.

Botany

Taxonomy

Algues 2
Polysiphonia 2

Specimens registered in collections

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

Polysiphonia atrorubescens Grev.

Botany

Taxonomy

Algues 2
Polysiphonia 2

Specimens registered in collections

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

Polysiphonia atrorubescens (Dillwyn) Grev.

Zoology

Taxonomy

Algues 23
Polysiphonia 23

Specimens registered in collections

Collection Number of specimens (or sets)
Marine Laboratory of Concarneau (CO) 23