Distribution: Introduced chiefly west of the Cascades; more common in eastern United States
Habitat: Disturbed ground, lawns and gardens
Flowers: May - June
Origin: Introduced from Europe
Conservation Status: Not of concern
Herbaceous perennial from slender rhizomes, the stem ascending or nearly erect, 1-3 dm. tall, with spreading hairs.
Leaves opposite, ovate, sessile, 1.5 cm. long and 0.8-2 cm. wide, coarsely serrate with rounded teeth.
Inflorescence of loose racemes on long peduncles arising in the leaf axils; calyx of 4 sepals; corolla blue, 9-12 mm. wide, 4-lobed, the upper lobe the largest; pedicels 5-9 mm. long; style 3-5 mm. long; stamens 2.
Capsule 3-3.5 mm. high, broadly triangular-obcordate.