butterweed
noun
but·ter·weed ˈbə-tər-ˌwēd 
: any of several plants having yellow flowers or smooth soft foliage: such as
a
: horseweed sense 1
b
: any of several North American senecios (such as Senecio glabellus)
Example Sentences
Recent Examples on the Web The new islands are thick with black willows and, in spring, thigh-high butterweed topped with small yellow flowers. 
Fox News, 29 June 2021
Fox News, 29 June 2021 Word History
First Known Use
1800, in the meaning defined above
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