Basionym Symphyotrichum undulatum (formerly Aster undulatus) is a species of flowering plant in the family Asteraceae native to eastern North America.

Its common name is wavyleaf aster,[3] and it is a perennial, herbaceous plant that flowers August through October and may reach heights between 30 and 160 centimeters (1 and 5 feet).

Symphyotrichum undulatum is a perennial, herbaceous plant that flowers from August through October, growing to heights between 30 and 160 centimeters (1 and 5 feet) from a cespitose rootstock.

[4] After pollination, the seeds of S. undulatum become dull purple to light brown or tan with an oblong-obovoid compressed shape, 1.7–2.2 mm in length with 3–4 nerves, and with a few stiff, slender bristles on the surface (strigillose).

[3] Symphyotrichum undulatum is native to the Canadian provinces of Nova Scotia and Ontario; and, the U.S. states of Alabama, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, and West Virginia, as well as in the District of Columbia.