This list of invasive plant species in Wisconsin includes non-native plant species or strains "that become established in natural plant communities and wild areas, replacing native vegetation".
The Invasive Plants Association of Wisconsin (IPAW) is a group working to address the problems presented by invasive species in Wisconsin. In Wisconsin it is illegal to "possess, transport, transfer, or introduce certain invasive species in Wisconsin without a permit".
Species on IPAW's list of invasive plants:
Acer platanoides – Norway maple Alliaria petiolata – garlic mustard Arctium minus – common burdock Berberis thunbergii – Japanese barberry Bromus inermis – smooth brome Campanula rapunculoides – creeping bellflower Celastrus orbiculatus – Oriental bittersweet Centaurea maculosa – spotted knapweed Cirsium arvense – Canada thistle Convallaria majalis – lily of the valley Convolvulus arvensis – field bindweed Crepis tectorum – hawksbeard Daucus carota – Queen Anne's lace Dipsacus laciniatus – cut-leaved teasel Dipsacus sylvestris – common teasel Elaeagnus angustifolia – Russian olive Elaeagnus umbellata – autumn olive Elytrigia repens – quackgrass Epipactis helleborine – helleborine orchid Euphorbia cyparissias – cypress spurge Euphorbia esula – leafy spurge Festuca arundinacea – tall fescue Glechoma hederacea – creeping Charlie Hemerocallis fulva – orange daylily Hesperis matronalis – dame's rocket Hieracium aurantiacum – orange hawkweed Hieracium caespitosum – yellow hawkweed Hypericum perforatum – St. John's wort Iris pseudacorus – yellow iris Leonurus cardiaca – motherwort Lonicera maackii – Amur honeysuckle Lonicera morrowii – Morrow's honeysuckle Lonicera tatarica – Tartarian honeysuckle Lonicera × bella – Bell's honeysuckle Lotus corniculatus – bird's-foot trefoil Lysimachia nummularia – moneywort Lythrum salicaria – purple loosestrife Melilotus alba – white sweet clover Melilotus officinalis – yellow sweet clover Morus alba – white mulberry Myosotis scorpioides – forget-me-not Myriophyllum spicatum – Eurasian watermilfoil Pastinaca sativa – wild parsnip Phalaris arundinacea – reed canary grass Phragmites australis – common reed grass Pinus sylvestris – Scots pine Poa compressa – Canada bluegrass Poa pratensis – Kentucky bluegrass Populus alba – white poplar Potamogeton crispus – curly-leaf pondweed Reynoutria japonica (syn. Polygonum cuspidatum) – Japanese knotweed Rhamnus cathartica – common buckthorn Rhamnus frangula – glossy buckthorn Robinia pseudoacacia – black locust Rosa multiflora – multiflora rose Rumex acetosella – sheep sorrel Saponaria officinalis – soapwort Securigera varia – crown vetch Solanum dulcamara – climbing nightshade Tanacetum vulgare – tansy Trifolium pratense – red clover Trifolium repens – white clover Typha angustifolia – narrow-leaved cattail Typha × glauca – hybrid cattail Ulmus pumila – Siberian elm Vinca minor – common periwinkle
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