Name: Hassallia byssoidea Hassall ex Bornet and Flahault 1886

Category: Species

Proposed as: sp. nov.

Etymology: bys.so.i’de.a. Gr. fem. n. byssos, flax, cotton; N.L. fem. adj. byssoidea, cotton-like

Pronunciation (Latin), gender: has-SAL-li-a bys-so-I-de-a, feminine

Valid publication: Bornet É, Flahault C. Revision des Nostocacées hétérocystées contenues dans les principaux herbiers de France (Troisième fragment). Annales des Sciences Naturelles, Botanique, Septième série 1886; 5:51-129.

Nomenclatural status: validly published under the ICN (Botanical Code)

Taxonomic status: synonym

Correct name: Tolypothrix byssoidea (Agardh 1812) Kirchner 1898

• Synonyms:

  • Name	Kind
    Tolypothrix byssoidea (Agardh 1812) Kirchner 1898	homotypic synonym, validly published under the ICN (Botanical Code)

• Notes:
  • 🥇 Nomenclatural type of the genus Hassallia Berkeley ex Bornet and Flahault 1886. Publication: Bornet É, Flahault C. Revision des Nostocacées hétérocystées contenues dans les principaux herbiers de France (Troisième fragment). Annales des Sciences Naturelles, Botanique, Septième série 1886; 5:51-129.
  • ❗ Hassallia byssoidea is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Hassallia.
  • 🎓 Name mentioned 5 times in PubMed until 2026-06-11.

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 4
Total number of child taxa: 4

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Hassallia byssoidea f. lignicola Bornet and Flahault 1886	validly published under the ICN (Botanical Code)	correct name
    Hassallia byssoidea var. polyclados Frémy 1928	validly published under the ICN (Botanical Code), illegitimate name	synonym
    Hassallia byssoidea var. polyclados Frémy 1927	validly published under the ICN (Botanical Code)	synonym
    Hassallia byssoidea f. saxicola Grunow 1886	validly published under the ICN (Botanical Code)	synonym

Parent taxon: Hassallia Berkeley ex Bornet and Flahault 1886

Assigned by: Bornet É, Flahault C. Revision des Nostocacées hétérocystées contenues dans les principaux herbiers de France (Troisième fragment). Annales des Sciences Naturelles, Botanique, Septième série 1886; 5:51-129.

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Record number: 6744