A plant with heart-shaped leaves, or a climbing vine considered a weed in some regions.
From 'heart' + 'weed' (Old English 'weod'), named for the distinctive heart-shaped appearance of its leaves.
Many plants were named by their leaf shapes before modern botany—'heartweed' helped people remember which plants were useful or harmful just by what their leaves looked like. It's folk taxonomy that actually worked pretty well!
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