dulse

Any of several edible red seaweeds, especially Rhodymenia palmata, found on middle and lower shores of the north Atlantic. They may have a single broad blade up to 30 cm/12 in long rising directly from the holdfast which attaches them to the sea floor, or may be palmate (with five lobes) or fan-shaped. The frond is tough and dark red, sometimes with additional small leaflets at the edge.