White Sagebrush

Artemisia ludoviciana Nutt. Gen. 2: 143. 1818
A perennial, with a branched rootstock; stem 3-6 dm. high, usually much branched, whitetomentose; leaves numerous, sessile, 3-10 cm. long, lanceolate in outline, entire or the lower pinnatifid, with lanceolate or linear-lanceolate, often falcate divisions, dark-green but slightly floccose when young and soon glabrate above, white-tomentose beneath; heads very numerous in a leafy panicle, horizontal or nodding; involucre campanulate, about 3 mm. high, 2-3 nun. broad; bracts 6-8, in three series, more or less tomentose; outer bracts ovate, half as long as the innermost, acute; inner bracts elliptic, obtuse, broadly scarious-margined; rayflowers 6-8; corollas 1.2 mm. long; disk-flowers 10-15; corollas 2 mm. long; achenes 1 mm. long.
Type locality: Banks of the Mississippi, near St. Louis. Distribution: Missouri to Utah, Arizona, and Texas.