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.