Distribution: Occurring chiefly east of the Cascades crest in Washington; Mt Adams south to southern California, east to Colorado and Wyoming.
Habitat: Open, moist to rather dry places, from the valleys and foothills to moderate or occasionally higher elevations in the mountains.
Conservation Status: Imperiled/Vulnerable in Washington (WANHP)
Slender annual, often much branched, the stem 3-10 cm. tall; herbage finely glandular-puberulent.
Leaves opposite, small and rather numerous, linear to narrowly oblong, mostly sessile and entire, 1- to 3-nerved from the base, up to 2 cm. long.
Flowers solitary in the leaf axils on pedicels under 1 cm. long, spreading and up-turned at the tip; calyx glandular-puberulent, 3-5 mm. long, the 5 short teeth rounded; corolla yellow, faintly spotted, 4-8 mm. long, only slightly bilabiate, the 5 lobes equal, notched at the tip, the throat narrow, under 2 mm. wide; style longer than the calyx; stamens 4.