18 April 2021

Symphyotrichum cordifolium (formerly Aster cordifolius), commonly known as common blue wood aster, blue wood-aster or heartleaf aster, is a herbaceous perennial plant in the family Asteraceae native to eastern North America.

Occurs from Manitoba east to Nova Scotia and Maine, south to Georgia and Alabama and west to Oklahoma. It grows primarily in mesic sites with soils that are rocky to loamy, but generally rich, at heights ranging from sea level along the coastal plain up to 1,200 m (3,900 ft) in the Appalachians. It can be found on open wooded slopes, along the banks of streams, on moist ledges, in swampy woods, along the borders of beech–maple and oak–hickory forests, as well as in clearings, thickets and along roadsides and ditches. It can also be found in urban areas where it is sometimes a weed species.