Native to (or naturalized in) Oregon:
- In cold climates a perennial forb (little woody material above ground) or a small shrub in mild areas. Has an aggressive and rhizomatous habit and forms dense colonies. Stems seldom branch and are loosely clustered or solitary. Generally erect and grows 0.5 to 3 feet (0.15-1.0 m) tall. Leaves, simple, alternate, to 11 cm, linear to lanceolate, margin entire, white-hairy below; lower leaves irregularly toothed and divided. Flower clusters are narrow and may reach 5-30 cm in length. Yellowish flower heads are more or less inconspicuous, <7 mm in diameter.
- Sun. Best in well-drained soil, drought tolerant. Fine for areas with poor dry soils
- Hardy to USDA Zone 3 It has a large native range, from the Northwest Territories of Canada south through the Intermountain region of the United States to Mexico; thus the range includes most of Canada and much of the United States and into southern Mexico. It is native to Oregon. There are 7-8 recognized subspecies, some are abundant and widespread while others are restricted to smaller geographic areas.
- Prairie Sage is popular in many gardens and landscapes because its silver-gray color is in dramatic contrast to neighboring green foliage. Among gardeners the plant is more commonly known as White Sage, Silver Wormwood or Western Mugwort. Several garden selections are available, including: 'Silver King' (compact, silver foliage), 'Silver Queen' (silvery deeply cut leaves), and 'Valerie Finnis' (jagged leaf margins).
- ludoviciana: of Louisiana (As stated above, it is native to much of the US, including Louisiana. One of its common names is Louisiana Wormwood.)