Ironweed (Vernonia noveboracensis)

Ironweed, also known as New York ironweed

A wildflower that meets your criteria is the Echinacea, also known as coneflower. This vibrant plant is often cultivated in gardens for its aesthetic appeal and its ability to attract pollinators such as bees and butterflies. Additionally, the Cherokee have historically used parts of the Echinacea plant for medicinal purposes.