European thistle with rather large heads and prickly leaves; extensively naturalized as a weed in the United States. Synonyms: boar thistle, bull thistle, Cirsium lanceolatum, Cirsium vulgare.
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Words linked to "Spear thistle" : Cirsium lanceolatum, boar thistle, plumed thistle, bull thistle, plume thistle |
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