s A Field Guide to the British Seaweeds - NMBAQC

Laminaria sp.
Thick leathery, very tough and
cartilaginous frond with thick
cylindrical and distinct stipe and
claw-like holdfast.
Found growing in the lower
littoral fringe and subtidally often
forming dense kelp beds.
Laminaria digitata – stipe
flexible and smooth only
stands upright in water,
with broad split frond
appearing finger-like
growing up to 2m long
Laminaria saccharina –
characterised by its crinkly, wavy
edge and undivided blade growing
up to 4m
Laminaria hyperborea – Rough stipe usually covered
with numerous red algal epiphytes, stipe very stiff and
stands upright with very broad finger-like split lamina
growing up to 3m long.