Aster laxifolius var. laetifolius Torrey & A. Gray
Aster laxifolius var. laetifolius Torrey & A. Gray is a synonym sensu FNA Ed. Comm., 2006b of:
Symphyotrichum lanceolatum (Willdenow) G.L. Nesom subsp. lanceolatum var. lanceolatum, an accepted variety name sensu FNA Ed. Comm., 2006b.