Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Colorado.
Habitat: Open, very dry areas.
Conservation Status: Not of concern
Dwarf annual up to 1 dm. high, becoming much branched when well-developed, finely glandular-puberulent.
Leaves opposite, entire, inconspicuously 3-5 nerved, obtuse, the lower oblanceolate, the upper elliptic to narrowly ovate, up to 3.5 cm. long and under 1 cm. wide.
Flowers solitary in the leaf axils, sub-sessile; calyx 5-8 mm. long, the 5 sharp teeth glandular-puberulent, 1-3 mm. long; corolla rich magenta, marked in the throat with yellow and deeper red, 1-2.5 cm. long, bilabiate, the lips equal; stamens 4
Capsule splitting at maturity.