channelled wrack

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The common name for the brown seaweed Pelvetia canaliculata. The thallus is flattened and branched, the branches lacking a midrib, and having inrolled margins which form moisture-retaining channels. This plant can grow higher on the shore than can any other seaweed: at and above high-water mark. It is used sometimes as fodder for sheep and cattle.

Subjects: Plant Sciences and Forestry — Ecology and Conservation.

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