Orris root is the dried rhizome of fragrant iris species, especially Iris pallida, a flowering perennial in the Iridaceae family associated with the Mediterranean region and southern Europe. The plant bears sword-like leaves and pale lavender flowers, and the cured rhizome is the part traditionally used.

Unlike many kitchen or tea herbs, orris root is best known for its role in perfumery, potpourri, tooth powders, and aromatic craft preparations. The rhizome is aged after harvest to develop its characteristic violet-like scent, which made it valuable in European herbal and cosmetic traditions.