Boltonia asteroides (False Aster)
Boltonia asteroides, also known as False Aster, is a U.S. native perennial, growing from five to six feet in full sun and average, well-drained soil. Its ray flowers range from white, to lavender, to pink, and to even purple, with a yellow eye. This late summer/early fall bloomer is quite showy and if height is an issue, it can be cut back by 1/3 to keep it in check. Butterflies like this one. Zones 4-8. Quarts. (Photo from Wiki Commons and in the public domain).
Boltonia decurrens (Decurrent False Aster)
Boltonia decurrens (Decurrent False Aster) is smothered in pale white to pink, aster-like flowers from mid to late summer. This native wildflower grows from four to five feet tall in full sun and average soil. Boltonia decurrens is good for a second bloom period, so be sure to cut it back after blooming and wait for the second act. Zones 4-8. Quarts.