This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
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.
 
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