Aster | Asteraceae, Perennial, Flowering | Britannica
aster, used informally to describe any of various chiefly fallblooming (often with showy flowers) leafystemmed herbaceous plants (Aster and related genera) in the Asteraceae asters, those of the Aster genus, are almost exclusively Eurasian, the alpine aster (A. alpinus) being the only North American species of the 180 in the genus.. Despite physical similarities, molecular data ...