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Invasive Plants

“I don’t believe that any invasive species has ever been introduced into the United States on purpose by someone who willingly said, ‘Oh yeah, this is going to be a problem, but I don’t care.’ They’ve almost all been inadvertent problems that were introduced by someone who thought they were doing something good or who thought they were bringing in something beautiful.” Katherine Kennedy, Center for Plant Conservation

DCIST has created the following list of the top most invasive plants in Door County, Wisconsin. This plant list contains species that are detrimental biologically and economically to Door County ecosystems.  Download a summary of these species here.

Common Reed Grass or Phragmites
(Phragmites australis)
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Garlic Mustard
(Alliaria petiolata)
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Purple Loosestrife
(Lythrum salicaria)
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Common Buckthorn
(Rhamnus cathartica)
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Glossy Buckthorn
(Rhamnus frangula)
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Reed Canary Grass
(Phalaris arundinacea)
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Bell's Honeysuckle
(Lonicera xbella)
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Tartarian Honeysuckle
(Lonicera tatarica)
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Japanese Knotweed
(Polygonum cuspidatum)
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Dames Rocket
(Hesperis matronalis)
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Spotted Knapweed
(Centaurea maculosa)
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Japanese Barberry
(Berberis thunbergii)
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Leafy Spurge
(Euphorbia esula)
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Common Teasel
(Dipsacus fullonum)
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Autumn Olive
(Elaeagnus umbellatea)
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Wild Parsnip
(Pastinaca sativa)
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