The invasion of natural habitats by non-native or exotic plants poses a serious threat to Illinois natural ecosystems, second only to habitat destruction in importance. The harm these weeds inflict on landscapes ranges from being direct pests of forests, prairies, and wetlands to highly competitive invaders capable of displacing native species.
WETLANDS
Eurasian Watermilfoil (Myriophyllum spicatum) pdf | map
Purple Loosetrife (Lythrum salicaria) pdf | map
Hydrilla (Hydrilla verticillata) pdf | map
Alligator Weed (Alternanthera philoxeroides) pdf | map
Watercress (Rorippa nasturtium-aquaticum, syn. Nasturtium officinale) pdf | map
Water Hyacinth (Eichhornia crassipes) pdf | map
Brazilian Elodea (Egeria densa) pdf | map
Flowering Rush (Butomus umbellatus) pdf | map
Reed Canary Grass (Phalaris arundinacea) pdf | map
Curly Pondweed (Potamogeton crispis) pdf | map
GRASSLANDS
Crown Vetch(Coronilla varia)pdf | map
Multiflora Rose (Rosa multiflora) pdf | map
Teasel (Common Teasel: Dipsacus syvestris & Cut-leaved Teasal: Dipsacus laciniatus) pdf | map
Sweet Clover (Yellow Sweet Clover: Melilotus officinalis & White Sweet Clover: Melilotus alba) pdf | map
Spotted Knapweed (Centaurea stoebe ssp. Micranthos) pdf | map
Common Reed Grass (Phragmites australis, syn. P. communis)
Leafy Spurge (Euphorbia esula) pdf | map
Giant Hogweed (Heracleum mantegazzianum) pdf | map
Bicolor Lespedeza (Lespedeza bicolor) pdf | map
Chinese Lespedeza (Lespedeza cuneata) pdf | map
WOODLANDS
Amur Honeysuckle (Lonicera maackii) pdf | map
Tatarian Honeysuckle (Lonicera tatarica) pdf | map
Japanese Honeysuckle (Lonicera japonica) pdf | map
Kudzu (Pueraria montana var. lobata) pdf | map
Tree-of-Heaven (Ailanthus altissima) pdf | map
Russian & Autumn Olive (Russian: Elaeagnus angustifolia & Autumn: Elaeagnus umbellata) pdf | map
European Buckthorn (Rhamnus cathartica) pdf | map
Garlic Mustard (Alliaria petiolata) pdf | map
Japanese Knotweed (Polygonum cuspidatum syn. Fallopia japonica) pdf | map
Wild Parsnip (Pastinaca sativa) pdf | map
Oriental Bittersweet (Celastrus orbiculatus) pdf | map
Chinese Yam/Cinnamon Vine (Dioscorea oppositifolia) pdf | map
Chocolate Vine/Five Leaf Akebia (Akebia quinata) pdf | map
AGRONOMIC
Common Dayflower (Commelina communis)
Star of Bethlehem (Ornithogalum umbellatum) pdf | map
Poison Hemlock (Conium maculatum) pdf | map
Maiden Grass (Miscanthus sinensis) pdf | map
Yellow Witchweed (Alectra vogelii)
White Campion (silene latifolia subsp. alba) pdf | map
Bur Cucumber (Sicyos angulatus) pdf | map
Mile-a-Minute Vine (Polygonum perfoliatum) pdf | map
Japanese Hop (Humulus japonicus) pdf | map
