Symphyotrichum cordifolium (Arrow-leaved Aster) is usually found in high-quality maple woodlands of Indiana, Michigan and Ohio, but tolerates a wide array of light situations in woodland gardens. Delicate light blue to lavender daisy flowers with creamy to pale yellow disc florets begin blooming in August in loose pyramidal clusters. It can be distinguished by similar asters by its heart-shaped toothed leaves. Asters are key pollinator plants because they provide a welcome source of late-season nectar. Also, numerous moths use them as larval hosts.
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Photo By: Sten [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0) or GFDL (http://www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons