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

Polysiphonia fastigiata Harv.

Botany

Taxonomy

Algues 1
Polysiphonia 1

Specimens registered in collections

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

Polysiphonia fastigiata (Roth) Greville

Botany

Taxonomy

Polysiphonia 3

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogames (PC) 3

Polysiphonia fastigiata Grev.

Botany

Polysiphonia fastigiata (Roth) Greville

Zoology

Taxonomy

Polysiphonia 6

Specimens registered in collections

Collection Number of specimens (or sets)
Laboratoire Maritime de Concarneau (CO) 6