bull thistle

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bull thistle

A biennial Eurasian thistle (Cirsium vulgare) in the composite family, naturalized in North America and having heads of purplish flowers and spiny stems and leaves.

[From its large head.]

bull′ this`tle

a tall, spiny thistle, Cirsium vulgare, having heads of pink to purple flowers: a common weed in North America.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.bull thistle - European thistle with rather large heads and prickly leavesbull thistle - European thistle with rather large heads and prickly leaves; extensively naturalized as a weed in the United States
plume thistle, plumed thistle - any of numerous biennial to perennial herbs with handsome purple or yellow or occasionally white flower heads
References in periodicals archive ?
However, at one particular seep (lower down the hillslope and with more soil) the colony had disappeared, and invasive species (bull thistle Cirsium vulgare, rye grass Festuca, vervain Verbena) predominated.
It is also the time to luxuriate in the colorful wildflower bouquets of chicory, pearly everlasting, cow parsnip, boneset, campion, pickerel weed, blue vervain, water lily, bull thistle, wood lily, meadow sweet, pokeweed, partridge pea, tansy, Indian pipes -- and one of the most beautiful of all -- purple loosestrife.
The arrow flew in a perfect arc, until it hit an unseen bull thistle in a puff of white and deflected slightly forward.