Obedient Plant, Crystal Peak White

Physostegia virginiana, commonly called obedient plant or false dragonhead, is a rhizomatous perennial that is native to North America from Quebec to Manitoba south to Florida and New Mexico.
In Missouri, it is commonly found in a variety of habitats including open meadows, prairies, stream banks, gravel bars, wooded bluff bases and railroad track right-of-ways (Steyermark).
Tubular, two-lipped, snapdragon-like, pink to pale lilac flowers in upright terminal spikes (each to 12-18”) bloom throughout summer (late June-September) atop square stems rising to 2-4’ tall.
Flowers bloom bottom to top on each spike, with each flower being subtended by a small leaf-like bract.
Stems are clad with opposite, narrow-lanceolate, sharply-toothed leaves (to 3-6” long).
Species plants are noted for being aggressive spreaders in the landscape by both rhizomes and self-seeding.  #1 gallon