This taxon name is not current. The available references for this name are:
Aster subulatus Michx. is a nomenclatural synonym.
Reason See G.L. Nesom in Phytologia 77:293 (1994)
Symphyotrichum subulatum (Michx.) G.L.Nesom has been misapplied against the current name Symphyotrichum squamatum (Spreng.) G.L.Nesom.
Reason Fide G.L. Nesom in sched.
See also: A longer explanation of these and other terms in our Plant Names Primer.
A taxon name that is no longer current will retain its ‘Threatened’, ‘Extinct’, or ‘Extinct in the Wild’ status until a new name has been published in a Biodiversity Conservation Order.