Cirsium pulcherrimum |
Cirsium vulgare |
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bull thistle, common thistle |
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Habit | Stout biennial, 3-15 dm. tall, the stem conspicuously spiny-winged from the bases of the leaves and covered with stiff, blunt hairs. | |
Leaves | Leaves pinnatifid, the largest again toothed or lobed; leaves covered with short, pointed hairs above and thinly white-woolly below. |
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Flowers | Heads several; involucre 2.5-4 cm. high, all its bracts spine-tipped; flowers all ligulate, purple or rarely white. |
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Fruits | Achenes less than 4 mm. long. |
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Cirsium pulcherrimum |
Cirsium vulgare |
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Flowering time | June-September | |
Habitat | Roadsides, fields, forest edge, ditches, balds, prairies, wastelots, and other disturbed, open areas. | |
Distribution | Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
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Origin | Introduced from Eurasia | |
Conservation status | Not of concern | |
Sibling taxa | ||
Web links |
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