agueweed

[ ey-gyoo-weed ]
/ ˈeɪ gyuˌwid /

noun

a boneset, Eupatorium perfoliatum.
a gentian, Gentianella quinquefolia, having bristly blue flowers.

Origin of agueweed

An Americanism dating back to 1885–90; ague + weed1

British Dictionary definitions for agueweed

agueweed
/ (ˈeɪɡjuːˌwiːd) /

noun

a North American gentianaceous plant, Gentiana quinquefolia, that has clusters of pale blue-violet or white flowers
another name for boneset