any of various yellow-flowered plants, such as the ragwort in Europe and some species of goldenrod in the US
yellowweed in American English
(ˈjelouˌwid)
noun
1.
any of certain coarse goldenrods
2.
the European ragwort Senecio jacobaea
Word origin
[1750–60; yellow + weed1]This word is first recorded in the period 1750–60. Other words that entered Englishat around the same time include: bunker, continental, infiltrate, railroad, swish