Publication: Phytologia. 77: 294. 1995.
selected vouchers: Not at WTU; WS?
Notes: FNA20: "Symphyotrichum ×amethystinum is the F 1 hybrid between S. ericoides and S. novae-angliae, encountered sometimes throughout the area where the two parental species co-occur. It is morphologically intermediate; it has non-spiny, sparsely stipitate-glandular phyllaries and rose-violet rays in mid-sized heads. Forma leucerythros Bemis and forma leucos Bemis have been described within this hybrid and may represent recombinants or normal population color variants."