Symphyotrichum cordifolium (formerly Aster cordifolius), commonly known as common blue wood aster, heartleaf aster, and blue wood-aster, is a perennial herbaceous flowering plant in the family Asteraceae native to central and eastern North America. It reaches heights of up to 1.2 meters (4 feet) and has bluish daisy-like flowers which bloom late-summer and fall in its range.