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The perennial plant is coarse, light yellow or brownish-green in color, erect and from 2 to 3 feet in height. It attaches itself to the rocks by branched, root like, discoid, woody extremities, developed from the base of the stalk. The front is almost fan-shaped, narrow and strap-shaped at the base, the rest flat and leaf-like in form. In great amount, kelp ash is used in soap and glass production. Alginate, a kelp-derived carbohydrate, is used to thicken products like ice cream, jelly, salad dressing, and toothpaste, as well as in manufactured goods. Kelp has been used in the treatment of goiter and scrofulous swellings.
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