spear thistle

Thesaurus

Noun

1.

spear thistle - European thistle with rather large heads and prickly leaves; extensively naturalized as a weed in the United Statesboar thistle, bull thistle, Cirsium lanceolatum, Cirsium vulgareplume thistle, plumed thistle - any of numerous biennial to perennial herbs with handsome purple or yellow or occasionally white flower heads