Distribution: Occurring on both sides of the Cascades crest in Washington, but more common west of the crest; British Columbia to California, east to Idaho and Utah.
Habitat: Shady, wooded slopes, forest openings and edge, from low to middle elevations in the mountains.
Conservation Status: Not of concern
Delicate annual from a taproot, the stem widely branched, weak, 0.5-3 dm. tall, sparsely stiff-hairy.
Leaves opposite, stiff-hairy, the blade 1-3.5 cm. long and 0.8-2.5 cm. wide, with 2 pairs of lateral lobes or coarse teeth.
Flowers solitary in the leaf axils, the pedicels 2-15 mm. long at flowering but elongating to up to 3 cm. in fruit; corolla lavender, shortly surpassing the calyx, cup-shaped, 1-4.5 mm. wide; calyx lobes 2-3 mm. long, the alternating appendages under 1 mm; stamens 5, the filaments short; style short, deeply 2-cleft.