channelled wrack 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.

channelled wrack 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 or as manure.