Description: Thallus erect, compressed to 14 (20) cms long, distinct main axes with a terminal groove. Lateral branches irregularly alternate. Holdfast discoid.

Habitat: Epilithic or epiphytic in low water rock pools and sublittoral to 5 m.

Distribution: Generally distributed around the British Isles. Europe: Artlantic coast of France and the Netherlands. Further afield: Morocco.

Similar Species: Osmunda pinnatifida has a stolonous holdfast unlike O. osmunda which has a discoid holdfast.

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

iNaturalist: Osmundea osmunda at iNaturalist World Species Observations database.

WoRMS: Osmundea osmunda at World Register of Marine Species. Accepted name: Osmundea osmunda (S.G.Gmelin) K.W.Nam & Maggs, 1994. AphiaID: 144844.

Classification: Biota; Plantae; Biliphyta; Rhodophyta; Eurhodophytina; Florideophyceae; Rhodymeniophycidae; Ceramiales; Rhodomelaceae; Laurencieae; Osmundea