Publication: Phytologia. 77: 293. 1995.
selected vouchers: WTU
Notes: See FNA Volume 20 for description of taxonomic boundaries for this species.
FNA20: "Symphyotrichum subspicatum is a weedy, highly polyploid species, probably of allopolyploid derivation from different combinations of species including S. chilense, S. eatonii, S. foliaceum, S. laeve, and S. spathulatum. Hybrids with S. hallii are known from western Oregon. The species passes into S. foliaceum in southeastern Alaska."