Wikipedia
Butter dock
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.
Usage examples of "butter dock".
The plant is frequently called Butter Dock, because its cool leaves have often been used in the country for wrapping up butter for the market.