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 Brownish-red to deep purple in colour, darkening with age, with a glossy surface. Frond 2-6 cm across, regularly alternately notched with sharply pointed apices, and thickened in centre forming a midrib in older parts of the plant. Fronds attached to the substratum by a solid discoid holdfast 5-13 mm in diameter, composed of fused radiating, root like, rhizomes.Fronds are perennial but plants on mobile substrata do not survive the winter.


Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

©  The Marine Biological Association of the United Kingdom

Source: Marine Life Information Network

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