Sphaeromeria argentea Nutt.
Perennial with many slender flowering stems arising from a basal leaf mat about 1/2 inch wide, tending to be somewhat woody at the base, fibrous-rooted with a short branched taproot. Principal leaves crowded on numerous short, sterile shoots at ground level. cauline leaves scattered, not very numerous, smaller and less cleft than the basal ones. Flowers in June and July. Located in dry, open, often rocky foothills, up to 2000 mountain elevations; moderately tolerant of alkali, found in the mountains of southern Idaho.