More about japweed
Our largest alga
In Japan, its country of origin, japweed is normally not longer then
about 75-120 cm in length. Along the French coast of the English Channel,
individuals up to 6-7 m are common, but plants up to 12 m have been observed.
In Sweden, japweed is usually found at depths between 0-10 m. The plants
are usually between 1,5-2 m in length, but lengths of up to 4 m have been
observed, thus making this species our largest alga.
Perennial primary shoots

The perennial primary shoot with holdfast, leaf-like
outgrowths and base of the yearly secondary shoots.
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