Artemisia tridentata subsp. tridentata

Artemisia angusta Rydberg, sp. nov
Artemisia tridentata angustifolia A. Gray, Proc. Am. Acad. 19: 49. 1883.
A shrub, 10-12 dm. high, with erect branches; bark straw-colored; leaves canescent, 2-4 cm. long, 1-4 mm. wide, linear and entire, or linear-cuneate and merely 3-toothed at the apex; heads numerous, sessile, clustered in leafy panicles; involucre canescent, 3.5-4 mm. high, 2 mm. broad; bracts 12-15, imbricate in 4-5 series, the outer thick, ovate, less than one fourth as long as the innermost; inner bracts oblong, obtuse, scarious-margined ; flowers 4-6; corollas trumpet-shaped, about 2 mm. long, glandular-granuliferous; achenes 1.5 mm. long.
Typb locality: Sotith Idaho.
Distribution: Washington, Oregon, Idaho, Nevada, and northern California.