A genus of climbing or trailing plants in the morning-glory family, known for their large white or pink funnel-shaped flowers and vigorous growth.
From Greek 'kalyx' (calyx, cup) plus 'stegos' (roof, covering), referring to the distinctive way the sepals form a protective roof-like structure over the flower bud.
Calystegia bindweed spreads so aggressively that it's considered invasive in many places, and one reason is its insanely productive root system—breaking it apart just creates more plants, making it the biological equivalent of a hydra.
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