Flax (L. usitatissimum) is a blue flowering crop grown for its oil-rich seeds. The seeds of flax are tiny, smooth and flat, and range in color from light to reddish brown. Linseed oil pressed from flaxseed is an "industrial" oil that is used for paints, coatings, linoleum, and many other products. Industrial linseed oil is not useable for food or feed, although the linseed oil meal remaining after linseed oil extraction is used for animal, principally dairy, feed.
Brown flaxseed is standardized under the U.S. Standards for Flaxseed.