Boltonia decurrens (Torr. & A. Gray) Alph. Wood
Boltonia asteroides (L.) L’Hér. var. decurrens (Torr. & A. Gray) Fernald
Boltonia latisquama A. Gray var. decurrens (Torr. & A. Gray) Fernald & Grisc.
Winged false aster
Decurrent false aster is native to the floodplains of the Illinois and Mississippi rivers, and now rare due to habitat loss. The plants are adapted to periodic flooding, capable of growing when largely submerged.
Identification: Plants form dense, bushlike clusters up to 5' (1.5 m) in height. Leaves decrease in width until they form wings on their stems (“decurrent”). They are up to 6" (15 cm) long, and linear or lanceolate. Like other members of the aster family, each flower is a composite flower, composed of a central yellow disc with 230-400 tiny disc florets, surrounded by 45-60 white or pale purple rays. Flowers are up to 1¾" (5 cm) across, occurring in dense panicles or corymbs. They appear from August to September.
Boltonia decurrens on Wikipedia
Boltonia decurrens on saveplants.org
Boltonia decurrens on eFloras
Boltonia decurrens description by Thomas H. Kent, last updated 25 May 2020.
Range: Zones 4-8: