A. novi-belgii. - Color, bright to pale violet blue. Leaves, lance-shaped, acute, entire, or some finely and distinctly toothed, firm, narrowed at base, the upper sessile and clasping, the lower petioled, 2 to 5 inches long. Stem, slender, leafy, branched, 1 to 3 feet high. Heads of flowers, numerous, in flattish panicles. Rays many. Disk bright yellow. August to October.
Swamps near the coast, Maine to Georgia. One of our commonest asters, late-flowering. There are many varieties of this aster. One, A. litoreus, is low, stiff, almost prickly, with shorter and broader leaves, found only near the coast.