Laminaria digitata (oarweed)
Laminaria digitata is a large brown alga in the family Laminariaceae, also known by the common name Oarweed. It is found in the sublittoral zone of the northern Atlantic Ocean. It is used in Japan and China for making dashi, a soup stock, and for other culinary purposes. Historically, the dried stalks of L digitata, called sea-tangle tents were used as an abortifacient and for inducing labour.