Description: Thallus rising from a discoid holdfast forming a thin blade up to 12 cms long, irregularly dichotomously branched but very variable. Often branching from the margins.

Habitat: Epilithic and epiphytic, very rare in the littoral but apparently not uncommon in the sublittoral to depths of 30 m.

Distribution: Widespread in the British Isles including the Shetlands and Channel Islands, but very rare on the eastern shores of England. Europe: Mediterranean, Azores, Portugal, Spain, France and the Baltic. Further afield: Canary Islands .

Similar Species: Other flat membranous species may be easily confused.

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

iNaturalist: Rhodophyllis divaricata at iNaturalist World Species Observations database.