[viper's bugloss] n (1597): a coarse Old World herb (Echium vulgare) of the borage family that is naturalized in No. America and has showy blue tubular flowers with exserted stamens--called also blueweed
VIPER'S BUGLOSS
Meaning of VIPER'S BUGLOSS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012