Aster novi-belgii var. tardiflorus (Linnaeus) A.G. Jones
Aster novi-belgii var. tardiflorus (Linnaeus) A.G. Jones is a synonym of:
Symphyotrichum ×tardiflorum (Linnaeus) Greuter, M.V. Aghababian & Wagenitz, an accepted species name sensu FNA Ed. Comm., 2006b.