Distribution: Garden plant, occasionally escaping but rarely persistent, in the Pacific Coast states and a few states in eastern United States.
Habitat: Old gardens, waste sites and rocky places.
Flowers: June - July
Origin: Introduced from Europe
Conservation Status: Not of concern
Rhizomatous perennial with over-wintering leafy shoots, the stems procumbent, much-branched, 5-25 cm. tall.
Leaves opposite, the petiole 0.5-1 cm. long, not winged; blades 1-veined, spatulate to ovate-lanceolate, 0.6-2.5 cm. long and 0.3-1.4 cm. wide.
Inflorescence a spreading, lax cyme; pedicles 2-6 mm. long; calyx united into a tube 7-12 mm. long, purple, oblong-cylindric, glandular-pubescent; petals 5, red to pink or white, 8-15 mm. long, clawed; stamens 10, attached to the petals; styles 2, filiform, 12-15 mm. long.
Capsules cylindric to ovoid, 6-8 mm. long, opening by 4 teeth.