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

Callithamnion gracillimum C.Agardh

Botany

Taxonomy

Algues 7
Callithamnion 7

Specimens registered in collections

Collection Number of specimens (or sets)
Cryptogams (PC) 7

Callithamnion gracillimum Harv.

Botany

Callithamnion gracillimum C.Agardh

Zoology

Callithamnion gracillimum J.Agardh

Zoology