Distribution: Occurring chiefly west of the Cascades crest in Washington; widely distributed throughout much of North America.

Habitat: Roadsides, fields, lawns, parks, wastelots, and other disturbed areas at lower elevations.

Flowers: March-July

Origin: Introduced from Eurasia

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bumblebees, bees

Annual herb with branched stems creeping at base and erect above; stems square in cross-section.

Opposite, heart-shaped, toothed, all with petioles; upper leaves usually purplish tinged.

Pink to purple, to 15 mm long with 5 irregular lobes at tip; in small clusters in leaf axils.

4 small nutlets.

The opposite leaves are all petiolate, even in the inflorescence, unlike Lamium amplexicaule which has sessile upper leaves; look also for the square stems and heart-shaped leaves.