The thinness, details, and position of the PM line here point to this species of Chlorochlamys.
http://mothphotographersgroup.msstate.edu/species.php?hodges=7074
Note the lanceolate phyllaries.
Very small, white flowers with five, regular parts, approx. 3 mm wide. Foliage is hirsute and spiny on the margins. Silvery sheen when viewed in large clumps or carpets.
Rita Blanca National Grasslands between Government Spring and Potato Spring