Distribution: Occurring on both sides of the Cascades crest in Washington, though more common east of the crest; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Lowlands and foothills in open, dry to moderately moist places.
Conservation Status: Not of concern
Simple to multi-branched, taprooted annual to 30 cm. tall. Plants hairy to hairy-glandular, at least on the upper half. Highly variable in appearance.
Lower leaves opposite, upper leaves alternate. Leaves linear to elliptic in shape, to 5 cm. long. and 8 mm. wide.
Usually in pairs at the tips of stems and branches. One flower often attached by a slender stalk (pedicel), the other attached nearly directly to the stem or branch (subsessile). Each 5-15 mm. long flower composed of a fused tube that is white or yellowish, with 5 lavender to pink lobes that are separate from each other.