Fucus ceranoides L.
Horned Wrack (Engl.)
Description: Dichotmously branched fronds arising from a
small disc via a short stipe; distinct midrib. Plants to 300 mm
with terminal receptacles with warty conceptacles; a distinctly
papery feel, and characteristically with elongated vesicles that
extend beyond the dichotomies.
Habitat: Found in the upper parts of estuaries
and similar habitats (e.g. coastal outflows) subjected to the
influence of freshwater for part of each tidal cycle.
Distribution: Found from the Mondego River in
Portugal (40°N Lat.) to northern Norway (70°N Lat.) and
Iceland; absent from the Baltic and most of the North Sea.
Usage: none known.
Similar species:
Fucus vesiculosus
generally has paired, rounded vesicles;
Fucus spiralis and
Fucus guiryi lack
vesicles. Both F. vesiculosus and
F. spiralis seem to have a complicated hybridization history
with Fucus ceranoides.
Link:
AlgaeBase
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