Distribution: Southern and southwestern Washington along the Columbia River; British Columbia south to California; scattered in eastern North America.
Habitat: Moist, disturbed areas.
Origin: Introduced from Europe
Conservation Status: Not of concern
Strongly aromatic, perennial herbs from creeping rhizomes, the square stems prostrate to ascending, pubescent, 2-6 dm. tall.
Leaves opposite, all cauline, petiolate, densely soft-pubescent, oval, nearly entire, small, with only 2-3 lateral veins.
Flowers in compact verticels in the axils of the deflexed upper leaves, which barely surpass the flower clusters, the verticels well separated; calyx pubescent, 2.5-3 mm. long, regular, 5-lobed, the 2 lower lobes narrower, 10-nerved; corolla nearly regular, four-lobed, with a short tube, lilac, 4-7 mm. long; stamens 4, equal, exerted; style 2-parted; ovary 2-celled, superior.