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.
Origin: Introduced from Eurasia
Conservation Status: Not of concern
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.