Fucus serratus L.
Description: Dichotmously branched fronds arising from a small disc via a short stipe; distinct midrib. Plants to 300 mm with terminal, compressed receptacles with warty conceptacles. This is the "Serrated wrack" of the lower shore in the north-eastern Atlantic. It is easily recognised by its saw-toothed frond, and a lack of swollen receptacles (see below).
Habitat: Zone forming on sheltered and
semi-exposed shores from about MTL down to about MLWN where it
meets the kelp zone.
Distribution: Widely distributed on all coasts
of Britain and Ireland. Spain north to Spitsbergen.
Usage: Fucus serratus is used in Ireland and
France for the production of seaweed extracts for cosmetics, and
for seaweed baths.
Similar species:
Fucus vesiculosus
generally has paired vesicles and does not have a saw-toothed
edge;
Fucus spiralis has
inflated terminal receptacles with a sterile rim,
Link:
AlgaeBase
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