boar thistle

Thesaurus

Noun

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