noun Date: 1837 any of several plants having yellow flowers or smooth soft foliage: as, horseweed 1, any of several North American senecios (as Senecio glabellus )
BUTTERWEED
Meaning of BUTTERWEED in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012