butterbur

butterbur

[buht-er-bur]
noun
any of several composite plants of the genus Petasites, having large, woolly leaves said to have been used to wrap butter.

Origin:
1540–50; butter + bur1

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World English Dictionary
butterbur (ˈbʌtəˌbɜː)
 
n
a plant of the Eurasian genus Petasites with fragrant whitish or purple flowers, woolly stems, and leaves formerly used to wrap butter: family Asteraceae (composites)

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