Viper's bugloss Meaning, Definition & Usage

  1. noun a coarse prickly European weed with spikes of blue flowers; naturalized in United States
    blue thistle; blue devil; Echium vulgare; blueweed.

WordNet

Definitions
  1. (Bot.), a rough-leaved biennial herb (Echium vulgare) having showy purplish blue flowers. It is sometimes cultivated, but has become a pestilent weed in fields from New York to Virginia. Also called blue weed.
Definitions
  1. a species of Echium.
  2. (Bot.), a rough-leaved biennial herb (Echium vulgare) having showy purplish blue flowers. It is sometimes cultivated, but has become a pestilent weed in fields from New York to Virginia. Also called blue weed.

Webster 1913