- n blueweed a coarse prickly European weed with spikes of blue flowers; naturalized in United States
Century Dictionary and Cyclopedia
- n blueweed The viper's bugloss, Echium vulgare, a foreign weed with showy blue flowers which has been introduced into the United States.
- n blueweed A cæsal piniaceous plant, Hoffmanseggia stricta, introduced from Mexico into Texas in alkali soils and regarded as a pest, though its tubers are eaten by hogs and its foliage, in dry seasons, by cattle. It is the camote del raton of the Mexicans.