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Photographer: Steve C. Garske
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Family Asteraceae
Cirsium vulgare (Savi) Ten.
bull thistle
Cirsium: derived from the Greek kirsion, "a kind of thistle;" also cirsos meaning "a swollen vein" for which thistle was once a remedy
vulgare: Latin for "common"
Invasive - Eradicate!
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| Status: | Introduced - naturalized; ecologically invasive |
| Plant: | erect, biennial, 2'-6' tall forb; stems very spiny-winged |
| Flower: | head 1 1/2" wide with purple disk flowers, bracts (phyllaries) with spiny tips; inflorescence of several heads in open clusters; blooms June-Oct. |
| Fruit: | dry seed on fluffy, feathery-divided pappus |
| Leaf: | very spiny, pinnately-divided into lobed, then toothed segments |
| Habitat: | disturbed sites, prairies, marshes, roadsides |
| (Glossary) |
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 Ten.&phog=Robert Bierman&spcode=CIRVUL)
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