Gongolaria baccata (S.G. Gmelin) Molinari & Guiry
Other scientific names: Cystoseira baccata (S.G.Gmelin)
P.C.Silva.
Common name: Bush Berry Wrack.
Description: Thllus to 1 m long, usually
solitary, attached by a thick, conical attachment disc. Axis
simple or branched, up to a metre in length, flattened, about
1.0 x 0.4 cm in transverse section; apex smooth and surrounded
during periods of active growth by incurved young laterals.
Lateral branch systems distichous, alternate, radially
symmetrical, profusely branched in a repeatedly pinnate fashion
and bearing sparse, filiform, occasionally bifurcate appendages
on the branches of higher orders; deciduous, leaving decurrent
bases which give an irregular, zigzag outline to the axis.
Cryptostomata absent. Air vesicles present in axes of branches
of higher order, sometimes in chains; seasonal, particularly
numerous in autumn. Receptacles 1-5 cm long, formed from axes of
ultimate ramuli, irregularly nodose and bearing simple, filiform
appendages.
Habitat: lower intertidal in large sandy pools
or lagoons, mostly in persistent stands.
Distribution: S England, W Ireland north to W
Scotland. Scotland south to Portugal, Spain, Morocco, and the
Canary Islands. Mediterranean.
Key characteristics: Intercalary pea-sized air
vesicles, sometimes in chains.
Photographs © M.D.Guiry

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