Description: An erect frond arising from a discoid holdfast to lengths of 20 or 30 cms and a diameter of about 2 mm. Branches irregular, the whole thallus soft, gelatinous and easily squashed. Composed of whorls of fine short filaments repeatedly branched.

Habitat: Uncommon. Generally epilithic from the upper sublittoral to over 13 m depth.

Distribution: Widely distributed, but mainly on the western shores of the British Isles. Europe: Mediterranean, the Baltic, Norway and Sweden. Further afield: Canary Islands.

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

iNaturalist: Dudresnaya verticillata at iNaturalist World Species Observations database.

WoRMS: Dudresnaya verticillata at World Register of Marine Species. Accepted name: Dudresnaya verticillata (Withering) Le Jolis, 1863. AphiaID: 145226.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Gigartinales; Dumontiaceae; Dudresnaya