The Heath Aster has a wide distribution, and there is some variability in regards to its size and appearance across different locations. Sometimes it will hybridize with other species of asters, such as Aster pilosus, making identification difficult. The Heath Aster differs from other asters with small white flowers primarily by its short, narrow leaves (never more than 3" long and ¼" across). Also, its flowers tend to be smaller in size and have fewer ray florets (about 12) than many other species.