Description: Gametangial phase much branched to 40 cms in length, opposite branches alternately unequal in length.

Habitat: Gametangial phase sublittoral.

Distribution: In Britain only known from Cornwall. Europe: Mediterranean, Atlantic coasts of Spain and France.

Similar Species: Indistinguishable from Bonnemaisonia asparagoides when sterile.

Distribution Map from NBN: Bonnemaisonia clavata at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Bonnemaisonia clavata at iNaturalist World Species Observations database.

WoRMS: Bonnemaisonia clavata at World Register of Marine Species. Accepted name: Bonnemaisonia clavata Hamel, 1930. AphiaID: 144441.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Bonnemaisoniales; Bonnemaisoniaceae; Bonnemaisonia