Cardiospermum halicacabum, balloon vine

Balloon vine, love-in-a-puff
Cardiospermum halicacabum

Hardiness: Zones 9-11
Plant type: Annual
Spread: <12"
Sun: Full Sun
Water: Medium, but can tolerate dryer soil better than overly wet soil
Bloom time: July to October
Bloom color: White
Soil: Well draining, garden soil, compost amendment beneficial

Notes: Grows aggressively and can become invasive

More information on this plant here.