Etymology: Physostegia: Greek for "bladder covering" referring to somewhat inflated appearance of flower
Plants: erect, perennial, 2'-5' tall forb, hairless; stems square, often branched toward the top; long horizontal, clone forming rhizomes
Leaves: opposite, mostly stalkless, usually toothed
Flowers: pink, 5-parted, 2/3"-1 1/3" long; inflorescence a 2"-6" tall, terminal cluster (raceme) with each stalked flower from the axil of a small leaf-like bract; blooms Aug.-Oct.
Fruits: 1-seeded, smooth nutlet
Habitat: full to partial sun; dry to moderate moisture; woods, prairies; in sandy, loamy soil
Conservation Status: Native
Floristic Rating: Coefficient of Conservatism = 7, Wetland Indicator = FACW Atlas of the Wisconsin Prairie and Savanna Flora: by T.S. Cochrane & H.H. Iltis: habitat, distribution infomation / flowering and fruiting times USDA Plants Database: Federal Distribution and detailed information including photos Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. Illinois Wildflowers: Wonderful photographs; detailed descriptions; color and leaf arrangement key