The birth flowers for September are the aster and the morning glory. 

1. Aster: Symbolizes love, wisdom, faith, and valor. The aster is known for its star-like shape and vibrant colors, which can range from white and pink to deep purples and blues.

2. Morning Glory: Represents affection, love, and the fleeting nature of life, as morning glories bloom in the morning and typically fade by the end of the day. They are known for their delicate, trumpet-shaped flowers in shades of blue, pink, purple, and white.