When the genus Aster was parsed by the genome people, largeleaf and its group became Eurybia. If you don't have the tools for phylogenetic analysis at hand, identification of plants in the various genera becomes exciting. You will need the whole plants. Roots, leaves, stems, flower heads, and particularly seeds get involved. Lots off fun for puzzlers! Largeleaf is also a little unusual as a summer woodland bloom. Indians ate the leaves, used the roots in soup, and used various parts as medicine. You might find largeleaf aster in CT, GA, IA(E), IL, IN, KY, MA, MD, ME, MI, MN, MO, NC, NH, NJ, NY, OH, PA, RI(S), SC, TN, VA, VT, WI, WV, MB, NB, NS, ON, PE, and QC. Lenawee Co MI, 7/26/14.