Plocamium cartilagineum (Linnaeus) P.S.Dixon
Description: Narrow, compressed, cartilaginous,
bright scarlet fronds, to 300 mm long, tufted, much divided.
Branching irregularly alternate, pinnules alternately secund in
twos to fives, with acute apices, lowest of each set a simple
spur, others increasingly strongly pectinate.
Habitat: On rocks and
Laminaria hyperborea stipes, lower intertidal and
subtidal, abundant, widely distributed, often washed ashore in
quantity, and persisting in the drift.
Similar species:
Sphaerococcus coronopifolius
and
Plocamium maggsiae.
Link:
AlgaeBase

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