Butter dock
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Look up butterdock in Wiktionary, the free dictionary.
Butter dock is an ambiguous term for certain plants, based on a misunderstanding of other common names of these. It can mean:
- Petasites hybridus, where it is derived from "Butterfly Dock".
- Rumex obtusifolius, where it may be derived from "Bitter Dock" but is also associated with the historic use of broad-leaf dock to wrap and preserve butter.