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Invasive species photo gallery

Non-native plant species

Inclusion in the list does not imply any legal restrictions for these plants. However, these plants and some of their cultivars have the potential to invade wild areas, outcompete native species, and degrade habitats. Some species may even cause extensive ecological damage.

This field guide has been developed to provide ID and control information for terrestrial invasive plants. Printed copies are now available to order using this order form, or feel free to download and print off now from our publication catalog.

Click on a thumbnail below to view photos available for that plant species, or view these plant species sorted by scientific name.

For further plant identification assistance, visit University of Wisconsin Weed ID [exit DNR].

See also native plant species.

Photo of Amur honeysuckle  by Dan Tenaglia.

Amur honeysuckle

Photo of Amur maple by Elizabeth J. Czarapata.

Amur maple

Photo of Aquatic forget-me-not by Elizabeth J. Czarapata.

Aquatic forget-me-not

Photo of Autumn olive  by Elizabeth J. Czarapata.

Autumn olive

Photo of Baby's breath by Elizabeth J. Czarapata.

Baby's breath

Photo of Balfour's touch-me-not by S. Kelly Kearns.

Balfour's touch-me-not

Photo of Bell’s or showy bush honeysuckle by Michael Clayton.

Bell’s or showy bush honeysuckle

Photo of Bird's-foot trefoil by Elizabeth J. Czarapata.

Bird's-foot trefoil

Photo of Bishop's goutweed by Nisa Karimi.

Bishop's goutweed

Photo of Black (European) alder by Elizabeth J. Czarapata.

Black (European) alder

Photo of Black bindweed by Elizabeth J. Czarapata.

Black bindweed

Photo of Black jet-bead by John Randall.

Black jet-bead

Photo of Black locust by Williams Bernie.

Black locust

Photo of Black or Louise’s swallow-wort by  Wisconsin DNR.

Black or Louise’s swallow-wort

Photo of Blackberry lilly by Richard Bauer.

Blackberry lilly

Photo of Bouncing-bet by Elizabeth J. Czarapata.

Bouncing-bet

Photo of Burdock by Elizabeth J. Czarapata.

Burdock

Photo of Burning bush by Elizabeth J. Czarapata.

Burning bush

Photo of Butter and  Eggs by Elizabeth J. Czarapata.

Butter and Eggs

Photo of Canada thistle by Elizabeth J. Czarapata.

Canada thistle

Photo of Celandine  by Elizabeth J. Czarapata.

Celandine

Photo of cheat grass, downy brome by Elizabeth J. Czarapata.

cheat grass, downy brome

Photo of Chicory by Elizabeth J. Czarapata.

Chicory

Photo of Chinese silvergrass, Eulalia by  Wisconsin DNR.

Chinese silvergrass, Eulalia

Photo of Chinese yam by Elizabeth J. Czarapata.

Chinese yam

Photo of Climbing euonymus, winter creeper  by  Wisconsin DNR.

Climbing euonymus, winter creeper

Photo of Common buckthorn  by Elizabeth J. Czarapata.

Common buckthorn

Photo of Common St. John's-wort by Elizabeth J. Czarapata.

Common St. John's-wort

Photo of Common teasel  by Elizabeth J. Czarapata.

Common teasel

Photo of Creeping bellflower  by Elizabeth J. Czarapata.

Creeping bellflower

Photo of Creeping charlie by Elizabeth J. Czarapata.

Creeping charlie

Photo of Crown vetch by Elizabeth J. Czarapata.

Crown vetch

Photo of Curly-leaf pondweed by Wisconsin DNR.

Curly-leaf pondweed

Photo of Cut-leaved teasel by  Wisconsin DNR.

Cut-leaved teasel

Photo of Cypress spurge  by Elizabeth J. Czarapata.

Cypress spurge

Photo of Deadly, woody nightshade by Elizabeth J. Czarapata.

Deadly, woody nightshade

Photo of English ivy by Elizabeth J. Czarapata.

English ivy

Photo of Eurasian watermilfoil by Elizabeth J. Czarapata.

Eurasian watermilfoil

Photo of European frogbit by Erich Haber.

European frogbit

Photo of European marsh thistle  by Steve Garske.

European marsh thistle

Photo of Everlasting pea by Emmet Judziewicz.

Everlasting pea

Photo of Field bindweed by Elizabeth J. Czarapata.

Field bindweed

Photo of Field, sheep sorrel by Elizabeth J. Czarapata.

Field, sheep sorrel

Photo of Flowering rush  by Kitty Kohout.

Flowering rush

Photo of Garden heliotrope or Valerian by Elizabeth J. Czarapata.

Garden heliotrope or Valerian

Photo of Garlic mustard  by  Wisconsin DNR.

Garlic mustard

Photo of Giant hogweed  by Steve Kenyon.

Giant hogweed

Photo of Giant knotweed  by Emmet Judziewicz.

Giant knotweed

Photo of Glossy buckthorn by Elizabeth J. Czarapata.

Glossy buckthorn

Photo of Grecian foxglove by  Wisconsin DNR.

Grecian foxglove

Photo of Hairy willow herb  by Elizabeth J. Czarapata.

Hairy willow herb

Photo of Helleborine orchid  by Elizabeth J. Czarapata.

Helleborine orchid

Photo of Hoary alyssum by Elizabeth J. Czarapata.

Hoary alyssum

Photo of honeysuckle by Elizabeth J. Czarapata.

honeysuckle

Photo of Hound’s tongue by Richard Bauer.

Hound’s tongue

Photo of Hybrid cattail by Elizabeth J. Czarapata.

Hybrid cattail

Photo of Hydrilla  by Elizabeth Czarapata.

Hydrilla

Photo of Indian yam by Elizabeth J. Czarapata.

Indian yam

Photo of Japanese barberry by Elizabeth J. Czarapata.

Japanese barberry

Photo of Japanese hedgeparsley or erect hedgeparsley by S. Kelly Kearns.

Japanese hedgeparsley or erect hedgeparsley

Photo of Japanese honeysuckle  by Elizabeth J. Czarapata.

Japanese honeysuckle

Photo of Japanese hops  by David Eagan.

Japanese hops

Photo of Japanese knotweed  by Elizabeth J. Czarapata.

Japanese knotweed

Photo of Japanese stilt grass  by Elizabeth J. Czarapata.

Japanese stilt grass

Photo of Johnsongrass by Elizabeth J. Czarapata.

Johnsongrass

Photo of Kudzu  by Elizabeth J. Czarapata.

Kudzu

Photo of Leafy spurge  by Elizabeth J. Czarapata.

Leafy spurge

Photo of Lesser celandine by Elizabeth J. Czarapata.

Lesser celandine

Photo of Lily-of-the-valley by Elizabeth J. Czarapata.

Lily-of-the-valley

Photo of Mile-a-minute vine by Elizabeth J. Czarapata.

Mile-a-minute vine

Photo of Moneywort by Elizabeth J. Czarapata.

Moneywort

Photo of Morrow’s honeysuckle by Kenneth Sytsma.

Morrow’s honeysuckle

Photo of Mullein by Elizabeth J. Czarapata.

Mullein

Photo of Multiflora rose  by Elizabeth J. Czarapata.

Multiflora rose

Photo of Musk thistle or Nodding thistle by Elizabeth J. Czarapata.

Musk thistle or Nodding thistle

Photo of Narrow-leaf cattail  by Elizabeth J. Czarapata.

Narrow-leaf cattail

Photo of Norway maple by Damon Smith.

Norway maple

Photo of Orange daylily by Elizabeth J. Czarapata.

Orange daylily

Photo of Orange hawkweed by Elizabeth J. Czarapata.

Orange hawkweed

Photo of Oriental bittersweet  by S. Kelly Kearns.

Oriental bittersweet

Photo of Ox-eye daisy by Elizabeth J. Czarapata.

Ox-eye daisy

Photo of Pale or European swallow-wort by John Randall.

Pale or European swallow-wort

Photo of Parrot feather  by  Wisconsin DNR.

Parrot feather

Photo of Periwinkle by Elizabeth J. Czarapata.

Periwinkle

Photo of Phragmites or Common reed non-native ecotype by Elizabeth J. Czarapata.

Phragmites or Common reed non-native ecotype

Photo of Plumeless thistle  by Elizabeth J. Czarapata.

Plumeless thistle

Photo of Poison hemlock  by  Wisconsin DNR.

Poison hemlock

Photo of Porcelain berry  by Elizabeth J. Czarapata.

Porcelain berry

Photo of Purple loosestrife  by Elizabeth J. Czarapata.

Purple loosestrife

Photo of Quackgrass by Elizabeth J. Czarapata.

Quackgrass

Photo of Queen Anne's-lace by Elizabeth J. Czarapata.

Queen Anne's-lace

Photo of Queen of the meadow by Stephen Solheim.

Queen of the meadow

Photo of Reed canary grass by Elizabeth J. Czarapata.

Reed canary grass

Photo of Russian knapweed by S. Kelly Kearns.

Russian knapweed

Photo of Russian olive  by Elizabeth J. Czarapata.

Russian olive

Photo of Scotch pine by Elizabeth J. Czarapata.

Scotch pine

Photo of Siberian elm by Elizabeth J. Czarapata.

Siberian elm

Photo of Siberian peashrub by Elizabeth J. Czarapata.

Siberian peashrub

Photo of Smooth brome by Elizabeth J. Czarapata.

Smooth brome

Photo of Spotted knapweed  by Elizabeth J. Czarapata.

Spotted knapweed

Photo of Spreading hedgeparsley by Elizabeth J. Czarapata.

Spreading hedgeparsley

Photo of Star-of-Bethlehem by Richard Bauer.

Star-of-Bethlehem

Photo of Tall hawkweed by Elizabeth J. Czarapata.

Tall hawkweed

Photo of Tansy by Elizabeth J. Czarapata.

Tansy

Photo of Tartarian honeysuckle  by  Wisconsin DNR.

Tartarian honeysuckle

Photo of Tree of heaven by Elizabeth J. Czarapata.

Tree of heaven

Photo of Water chestnut  by  Vermont Department of Environmental Conservation.

Water chestnut

Photo of Watercress by Elizabeth J. Czarapata.

Watercress

Photo of White mulberry by Elizabeth J. Czarapata.

White mulberry

Photo of White poplar by Elizabeth J. Czarapata.

White poplar

Photo of White sweet-clover by Elizabeth J. Czarapata.

White sweet-clover

Photo of Wild chervil  by Elizabeth J. Czarapata.

Wild chervil

Photo of Wild parsnip by Elizabeth J. Czarapata.

Wild parsnip

Photo of Wild/European Privet by Elizabeth J. Czarapata.

Wild/European Privet

Photo of Wineberry or wine raspberry by John Randall.

Wineberry or wine raspberry

Photo of Woodland forget-me-not by Elizabeth J. Czarapata.

Woodland forget-me-not

Photo of Yellow sedum by Richard Bauer.

Yellow sedum

Photo of Yellow sweet-clover by Elizabeth J. Czarapata.

Yellow sweet-clover

Last revised: Thursday, July 18, 2013