Common Crupina (Crupina vulgaris) |
Status: |
Listed Noxious Weed In Montana |
History: |
First Montana Specimen Collected 1 |
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County: |
None |
Year: |
None |
| “The source and means of Crupina’s introduction into the U.S. is
not known (Couderc-LeVaillant and Talbott Roche 1993). The first North American
population was discovered in Idaho in 1969 (Stickney 1972). This initial 40-acre infestation spread
to 23,000 acres by 1981 (Thill et al 1987). Washington's infestation was discovered in 1984 by a
hiking botanist. Control work began in 1988.Initial efforts focused on hand-pulling along rights-of-way.
Infestations in Montana are very rare.”(WWCB) |
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Habitat: |
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Growth Habit: |
Winter annual, erect to 3 feet tall.
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Leaves: |
Rosette leaf margins smooth to slightly toothed, cotyledons have a red to purple midrib.
Mature plant leaves alternate, attached directly to stems, deeply lobed or dissected with margins containing short stiff spines.
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Stem: |
Stiff, terminating in one to several flowering branches.
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Flower: |
1 to 5 heads per branch, narrow cylindrical, pink lavender or purple. Flower in June and July.
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Roots: |
Taproot.
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Seeds: |
Oblong with a ring of dark stiff bristles encircling the broad end of the seed.
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Other Notes: |
Currently no known infestations in the Yellowstone River corridor.
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