Photo and description from Johnny's Seeds (www.johnnyseeds.com).
Lacy blue-green ornamental. Bushy habit is ideal for short hedges or borders. Unique and attractive foliage makes a useful cut flower filler, lasting for up to three weeks in a vase. Pungent aroma. Limited culinary use due to strong bitter flavor. Medicinal: Warming herb primarily used as an antispasmodic. Perennial in Zones 4-9.
Note: Can be toxic when taken internally. Not for pregnant women. Consult a qualified medical practitioner before using. Handling the fresh herb can also cause skin photosensitivity.