Color, pale violet. Leaves, rough above, smooth beneath, oblong to lance-shape, sessile, acute, serrate, distinctly pinnately veined, 2 to 3 inches long. Stent, simple or branched near the summit, very leafy, with flowers in corymbs, generally slightly hairy. Bracts, bell-shape, fringed at the tips. July to September.
Swamps, bogs, and low, moist woods. New England to Delaware and Pennsylvania.