A genus of tropical climbing plants with heart-shaped seeds, commonly known as balloon vine.
Greek 'kardia' (heart) + 'sperma' (seed), because the plant's seeds have a heart-shaped marking or structure. This botanical term names the plant for its most distinctive feature, visible when seeds are examined closely.
Cardiospermum halicacabum produces papery balloon-like seed pods that children can pop, and people in traditional medicine use it for everything from arthritis to fever—it's proof that plants named for their appearance often had uses the namers already knew about.
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