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CONNECTICUT INVASIVE PLANT LIST
|
AQUATIC & WETLAND PLANTS |
|||
Species |
|
Invasi |
Potentially Invasive |
Butomus umbellatus L. |
Flowering rush |
|
X |
Cabomba caroliniana A. Gray |
Fanwort |
X |
|
Callitriche stagnalis Scop. |
Pond water-starwort |
|
X |
Egeria densa Planchon |
Brazilian water-weed |
|
X |
†Eichhornia crassipes (Mart.) Solms |
Common water-hyacinth |
|
X |
Hydrilla verticillata (L.f.) Royle |
Hydrilla |
X |
|
Iris pseudacorus L. |
Yellow Iris |
X |
|
Lythrum salicaria L. |
Purple loosestrife |
X |
|
Marsilea quadrifolia L. |
European waterclover |
|
X |
Myosotis scorpioides L. |
Forget-me-not |
X |
|
Myriophyllum aquaticum (Vell.) Verdc. |
Parrotfeather |
|
X |
Myriophyllum heterophyllum Michx. |
Variable-leaf watermilfoil |
X |
|
Myriophyllum spicatum L. |
Eurasian watermilfoil |
X |
|
Najas minor All. |
Brittle water-nymph |
|
X |
Nelumbo lutea (Willd.) Pers. |
American water lotus |
|
X |
†Nymphoides peltata (Gmel.) Kuntze |
Yellow floating heart |
|
X |
†Pistia stratiotes L. |
Water lettuce |
|
X |
Potamogeton crispus L. |
Crispy-leaved pondweed |
X |
|
Rorippa microphylla (Boenn. ex Reichenb.) Hyl. ex A. & D. Löve |
Onerow yellowcress |
|
X |
Rorippa nasturtium-aquaticum (L.) Hayek |
Watercress |
|
X |
†Salvinia molesta Mitchell complex |
Giant salvinia |
|
X |
Trapa natans L. |
Water chestnut |
X |
|
|
|||
TREES |
|||
Species |
Common name |
Invasive |
Potentially Invasive |
Acer ginnala L. |
Amur maple |
|
X |
*Acer platanoides L. |
Norway maple |
X |
|
Acer pseudoplatanus L. |
Sycamore maple |
|
X |
Ailanthus altissima (Mill.) Swingle |
Tree of heaven |
X |
|
Paulownia tomentosa (Thunb.) Steudel |
Princess tree |
|
X |
Populus alba L. |
White poplar |
|
X |
*Robinia pseudo-acacia L. |
Black locust |
X |
|
|
|||
SHRUBS |
|||
Species |
Common name |
Invasive |
Potentially Invasive |
Amorpha fruticosa L. |
False indigo |
|
X |
*Berberis thunbergii DC. |
Japanese barberry |
X |
|
Berberis vulgaris L. |
Common barberry |
X |
|
Elaeagnus angustifolia L. |
Russian olive |
|
X |
Elaeagnus umbellata Thunb. |
Autumn olive |
X |
|
*Euonymus alatus (Thunb.) Sieb. |
Winged euonymus |
X |
|
Frangula alnus Mill. |
Glossy buckthorn |
X |
|
Ligustrum obtusifolium Sieb. & Zucc. |
Border privet |
|
X |
Ligustrum ovalifolium Hassk. |
California privet |
|
X |
Ligustrum vulgare L. |
European privet |
|
X |
Lonicera ×bella Zabel |
Bell's honeysuckle |
X |
|
Lonicera maackii (Rupr.) Maxim. |
Amur honeysuckle |
X |
|
Lonicera morrowii A. Gray |
Morrow's honeysuckle |
X |
|
Lonicera tatarica L. |
Tatarian honeysuckle |
|
X |
†Lonicera xylosteum L. |
Dwarf honeysuckle |
|
X |
Rhamnus cathartica L. |
Common buckthorn |
X |
|
Rosa multiflora Thunb. |
Multiflora rose |
X |
|
*Rosa rugosa Thunb. |
Rugosa rose |
|
X |
Rubus phoenicolasius Maxim. |
Wineberry |
|
X |
|
|||
WOODY VINES |
|||
Species |
Common name |
Invasive |
Potentially Invasive |
*Ampelopsis brevipedunculata (Maxim.) Trautv. |
Porcelainberry |
|
X |
Celastrus orbiculatus Thunb. |
Oriental bittersweet |
X |
|
*Lonicera japonica Thunb. |
Japanese honeysuckle |
X |
|
Pueraria montana (Lour.) Merr. |
Kudzu |
|
X |
|
|||
HERBACEOUS PLANTS |
|||
Species |
Common name |
Invasive |
Potentially Invasive |
Aegopodium podagraria L. |
Goutweed |
X |
|
Alliaria petiolata (Bieb.) Cavara & Grande |
Garlic mustard |
X |
|
Cardamine impatiens L. |
Narrowleaf bittercress |
X |
|
Centaurea biebersteinii DC. |
Spotted knapweed |
X |
|
Cirsium arvense (L.) Scop. |
Canada thistle |
|
X |
Cynanchum louiseae Kartesz & Gandhi |
Black swallow-wort |
X |
|
Cynanchum rossicum (Kleo.) Borhidi |
Pale swallow-wort |
X |
|
Datura stramonium L. |
Jimsonweed |
|
X |
Elsholtzia ciliata (Thunb.) Hylander |
Crested late-summer mint |
|
X |
Euphorbia cyparissias L. |
Cypress spurge |
|
X |
Euphorbia esula L. |
Leafy spurge |
X |
|
Froelichia gracilis (Hook.) Moq. |
Slender snake cotton |
|
X |
Glechoma hederacea L. |
Ground ivy |
|
X |
Heracleum mantegazzianum Sommier & Lavier |
Giant hogweed |
|
X |
Hesperis matronalis L. |
Dame's rocket |
X |
|
Humulus japonicus Sieb. & Zucc. |
Japanese hops |
|
X |
†Impatiens glandulifera Royle |
Ornamental jewelweed |
|
X |
Kochia scoparia (L.) Schrader |
Common kochia |
|
X |
Lepidium latifolium L. |
Perennial pepperweed |
X |
|
Lychnis flos-cuculi L. |
Ragged robin |
|
X |
*Lysimachia nummularia L. |
Moneywort |
|
X |
*Lysimachia vulgaris L. |
Garden loosestrife |
|
X |
Onopordum acanthium L. |
Scotch thistle |
|
X |
Ornithogalum umbellatum L. |
Star-of-Bethlehem |
|
X |
Polygonum caespitosum Blume |
Bristled knotweed |
|
X |
Polygonum cuspidatum Sieb. & Zucc. |
Japanese knotweed |
X |
|
Polygonum perfoliatum L. |
Mile-a-minute vine |
X |
|
Polygonum sachalinense F. Schmidt ex Maxim. |
Giant knotweed |
|
X |
Ranunculus ficaria L. |
Fig buttercup |
X |
|
Rumex acetosella L. |
Sheep sorrel |
|
X |
†Senecio jacobaea L. |
Tansy ragwort |
|
X |
Silphium perfoliatum L. |
Cup plant |
|
X |
Solanum dulcamara L. |
Bittersweet nightshade |
|
X |
Tussilago farfara L. |
Coltsfoot |
X |
|
Valeriana officinalis L. |
Garden heliotrope |
|
X |
|
|||
GRASSES AND GRASS-LIKE PLANTS |
|||
Species |
Common name |
Invasive |
Potentially Invasive |
Arthraxon hispidus (Thunb.) Makino |
Hairy jointgrass |
|
X |
Bromus tectorum L. |
Drooping brome-grass |
|
X |
†Carex kobomugi Owhi |
Japanese sedge |
|
X |
Glyceria maxima (Hartman) Holmburg |
Reed mannagrass |
|
X |
Microstegium vimineum (Trin.) A. Camus |
Japanese stilt grass |
X |
|
*Miscanthus sinensis Anderss. |
Eulalia |
|
X |
Phalaris arundinacea L. |
Reed canary grass |
X |
|
Phragmites australis (Cav.) Trin. |
Common reed |
X |
|
Poa compressa L. |
Canada bluegrass |
|
X |
* An asterisk (*) denotes that the species, although shown by scientific evaluation to be invasive, has cultivars that have not been evaluated for invasive characteristics. Further research may determine whether or not individual cultivars are potentially invasive. Cultivars are commercially available selections of a plant species that have been bred or selected for predictable, desirable attributes of horticultural value such as form (dwarf or weeping forms), foliage (variegated or colorful leaves), or flowering attributes (enhanced flower color or size).
† A dagger (†) indicates species that are not currently known to be naturalized in Connecticut but would likely become invasive here if they are found to persist in the state without cultivation.
January 2004
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