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Laminaria digitataDark brown, to 2 m in leth; with a claw-like holdfast, a smooth, flexible stipe, and a laminate blade to 1.5 m lo split into fier-like segments.b
Location/common name:- Kelp anguillier Atlantic kombu Braggair fingered tangle fouet de sorcière goazle goémon devery common in the lower intertidal and shallow subtidal growi on rock in Britain and Ireland. May form extensive meadows at low water (top picture from Robin Hood's Bay, Yorkshire). Underwater plants are more golden in colour in sunlight. Common on all coasts of Britain and Ireland except for the east and south-east coast of Eland from Yorkshire to the N coast of Kent; otherwise distributed from Svalbard, Iceland and northern Russia south to Brittany. In the western Atlantic from the NE coast of Greenland
Usesin France (Brittany) for alginate production; and in Ireland and France in small quantitites for sea-vegetable production.
Laminaria hyperboreaDark brown, to 2 m in leth; with a claw-like, conical holdfast, a rough, rigid stipe which generally sticks up out of the water, and is covered in epiphytes when older, and a laminate blade to 1.5 m lo dividi into fier-like segments.
Location/common name:- Kelp May Weed baudrée cuvie cuvy goémon d’avril laminaire rugueuse redware sea rod sea rodCommon at extreme low water in wave-exposed areas, and in the subtidal in optically clear water growi on rock to a depth of 32 m. Forms extensive closed communities at depths of 0-24 m. All coasts of Britain and Ireland. lower mid-littoral
Usesn Norway for alginate production, in Ireland cast-up stipes used to be collected for alginate production in Scotland but collection has ceased in reent years.