noun
- A plant of the genus Commelina, having blue flowers and round seed capsules.
Usage: chiefly North American; also called dayflower
Examples
- The blueball flowers opened in the morning and closed by afternoon.
- Blueballes are common wildflowers in meadows and disturbed areas.
- She identified the blueball by its distinctive three-petaled blue flowers.
- The blueball plant spreads easily through its round seed pods.