WordNet
blue thistle
n. a coarse prickly European weed with spikes of blue flowers; naturalized in United States [syn: blueweed, blue devil, viper's bugloss, Echium vulgare]
Usage examples of "blue thistle".
A war drum was leading the chant, and as Vaylo looked on a standard was raised: the Bloody Blue Thistle of Dhoone.
The Bloody Blue Thistle had been raised above the black dome of the Banhouse, and the standard blew straight and true and to the south.