September's birth flower is the aster.
Asters offer that happy yellow face encircled with rayed petals. Asters are part of the sunflower or daisy family. The Aster is named from the Greek word for star. In the language of flowers, reflecting the changing season, the Aster signifies farewell. Farewell to the lazy days of summer, to swimming pools and picnics, and farewell to the summer harvest.
There was a little anonymous poem about September and asters printed in The Bluff City News out of Kansas in 1903. Here's what it said:
September's fields are golden. Her skies are azure fair.And In her beauty holdenAre gifts beyond compare.Who cares for roses sweet?When all September's astersAre flowering at our feet.