bitterweed

[ bit-er-weed ]
/ ˈbɪt ərˌwid /

noun

any of various plants containing a bitter principle, as those of the genus Picris.
a sneezeweed, Helenium amarum.

Origin of bitterweed

An Americanism dating back to 1810–20; bitter + weed1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for bitterweed

bitterweed

/ (ˈbɪtəˌwiːd) /

noun

any of various plants that contain a bitter-tasting substance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012