The Long Island Invasive Species Management Area

Non-Native Plant Species Invasiveness Assessments

A system/protocol designed to assess the invasive nature of non-native plant species was developed by The Nature Conservancy (TNC) in New York and the Brooklyn Botanic Garden (BBG) in 2008, under the auspices of LIISMA (Long Island Invasive Species Management Area). The ranking system is designed to be repeatable, based on the best available science, clearly explained and fully documented. The system can be used to assess non-native plant species that are established in NYS, and also species that are new arrivals or are not yet present.

To see completed NYS assessments and a full explanation of the process CLICK HERE.

To see a list of the voting members of the committee and their organizations CLICK HERE.

In order to better inform local efforts, species can be further assessed using the Partnership for Regional Invasive Species Management (PRISM) form. Completed assessments specific to Long Island can be found below.

Species Assessments for Long Island

Scientific Name Common Name LIISMA Profile

Acer ginnala

Amur maple  

Acer palmatum Thunb.

Japanese maple LI PDF
 

Acer platanoides

Norway maple  

Acer pseudoplatanus

Sycamore maple  

Achatina achatina

Giant Ghana Snail, Giant Tiger Land Snail  

Achatina fulica

Giant African Land Snail  

Achyranthes japonica (Miq.) Nakai (syn. Achyranthes bidentata var. japonica Miq.)

Japanese Chaff Flower LI PDF
 

Adelges tsugae

Hemlock Woolly Adelgid  

Aegopodium podagraria

Bishop's goutweed LI PDF
 

Agrilus planipennis

Emerald Ash Borer  

Agrostis gigantea Roth (Agrostis alba auct. non L.; Agrostis gigantea Roth var. dispar (Michx.) Philipson; Agrostis nigra With.; Agrostis stolonifera L. ssp. gigantea (Roth) Schuebl. & Martens; Agrostis stolonifera L. var. major (Gaudin) Farw.)

Redtop, black bentgrass  

Ailanthus altissima (Miller) Swingle

Tree of heaven  

Akebia quinata

Chocolate vine  

Albizia julibrissin Durazz.

Silktree, mimosa LI PDF
 

Alliaria petiolata

Garlic mustard LI PDF
 

Alnus glutinosa

European alder, black alder LI PDF
 

Alopochen aegyptiacus

Egyptian Goose  

Alosa pseudoharengus

Alewife  

Amelopsis brevipedunculata

Porcelain berry LI PDF
 

Amynthas spp.

Asian Earthworms  

Anoplophora glabripennis

Asian Longhorned Beetle  

Anthriscus sylvestris (L.) Hoffm.

Wild chervil LI PDF
 

Apis mellifera scutellata x A. m ligustica, A. m iberiensis

Africanized Honey Bee  

Aralia elata

Japanese angelica tree LI PDF
 

Archachatina marginata

Margis, Giant West African Snail  

Artemesia vulgaris L.

Common wormwood, Mugwort LI PDF
 

Arthraxon hispidus

Small carpgrass LI PDF
 

Arundinaria gigantea (Walter) Muhl. (including ssp. giantea and ssp. tecta (Walter) McClure [=A. tecta (Walter) Muhl.])

Bamboo, canebreak, giant cane LI PDF
 

Bellamya chinensis (Cipangopaludina chinensis)

Chinese Mystery Snail  

Bellamya japonica (Cipangopaludina japonica)

Japanese Mystery Snail  

Berberis thunbergii (incl. B. ottowensis)

Japanese barberry LI PDF
 

Berberis vulgaris

Common barberry LI PDF
 

Bithynia tentaculata

Faucet Snail  

Brachypodium sylvaticum (Huds.) P. Beauv. ssp. sylvaticum

Slender falsebrome LI PDF
 

Bromus tectorum L.

Cheat grass, downy brome LI PDF
 

Buddleja davidii Franch.

Orange-eye butterfly bush LI PDF
 

Butomus umbellatus L.

flowering-rush LI PDF
 

Bythotrephes cederstroemi (B. longimanus)

Spiny Water Flea  

Cabomba caroliniana A. Gray, Ann

Carolina fanwort LI PDF
 

Cairina moschata

Muscovy Duck  

Callitriche stagnalis Scop.

Pond water-starwort LI PDF
 

Caragana arborescens Lam.

Siberian peashrub LI PDF
 

Carassius auratus

Goldfish  

Carcinus maenas

Green Crab  

Cardamine impatiens L.

Narrowleaf bittercress LI PDF
 

Carex kobomugi/C. macrocephala

Japanese sedge/largehead sedge LI PDF
 

Caulerpa taxifolia

Killer alga  

Celastrus orbiculatus

Oriental bittersweet LI PDF
 

Centaurea jacea s.l. (including C. nigra, C. nigrescens, C. xmoncktonii)

Black knapweed, black star-thistle, brown knapweed, brown ray knapweed, brown star-thistle, lesser knapweed, meadow knapweed, protean knapweed, short-fringed knapweed, short-fringed star-thistle, tyrol knapweed, vochin knapweed LI PDF
 

Centaurea stoebe ssp. micranthos s.l. (including C. biebersteinii, C. diffusa, C. maculosa misapplied, C. xpsammogena)

Spotted knapweed, spotted star-thistle LI PDF
 

Cercopagis pengoi

Fishhook Water Flea  

Channa argus

Northern Snakehead  

Channa marulius

Bullseye Snakehead  

Channa micropeltes

Giant Snakehead  

Cirsium arvense (L.) Scop. (C. setosum, C. incanum, Carduus arvensis, Serratula arvensis & all varieties of C. arvense)

Creeping thistle, Californian thistle, Canada thistle, field thistle LI PDF
 

Cirsium palustre (L.) Scop (Carduus palustris)

Marsh thistle, European swamp thistle LI PDF
 

Clarias batrachus

Walking Catfish  

Clematis terniflora

Japanese virgin's-bower LI PDF
 

Corbicula fluminea

Asian Clam  

Coronilla varia (Securigera varia)

Crownvetch LI PDF
 

Crassostrea ariakensis

Suminoe Oyster  

Cryptococcus fagisuga

Beech Scale  

Ctenopharyngodon idella

Grass Carp  

Cygnus olor

Mute Swan  

Cynanchum louiseae

Black swallow-wort LI PDF
 

Cynanchum rossicum

European swallow-wort LI PDF
 

Cyperus difformis L.

Variable flatsedge LI PDF
 

Cyprinella lutrensis

Red Shiner  

Cyprinus carpio

Common Carp  

Daphnia lumholtzi

Water Flea  

Datura stramonium L.

Jimsonweed, common thorn apple, Jamestown weed, purple thorn apple LI PDF
 

Didemnum vexillum

Carpet Tunicate  

Digitalis lanata Ehrh.

Grecian foxglove LI PDF
 

Digitalis purpurea L

Purple foxglove LI PDF
 

Dioscorea polystachya (D. oppositifolia L. misapplied)

Chinese yam, Cinnamon vine LI PDF
 

Dipsacus laciniatus L.

Cut-leaf teasel LI PDF
 

Dreissena polymorpha

Zebra Mussel  

Dreissena  rostriformis bugensis

Quagga Mussel  

Egeria densa Planchon

Brazilian waterweed LI PDF
 

Eichhornia crassipes

Common water-hyacinth  

Elaeagnus angustifolia

Russian olive LI PDF
 

Elaeagnus umbellata

Autumn olive LI PDF
 

Eleutherococcus pentaphyllus (Siebold & Zucc.) Nakai (Synonyms: Eleutherococcus seiboldianus (Makino) Koidzumi;
Acanthopanax sieboldianus Makino)

Five-leaved Aralia LI PDF
 

Epilobium hirsutum L.

Great hairy willow-herb, codlins & cream LI PDF
 

Eragrostis curvula

Weeping lovegrass LI PDF
 

Eriocheir sinensis

Chinese Mitten Crab  

Euonymus alatus

Winged burning bush, winged euonymus LI PDF
 

Euonymus europaeus L.

European spindletree LI PDF
 

Euonymus fortunei

Winter creeper LI PDF
 

Euphorbia cyparissias

Cypress spurge LI PDF
 

Euphorbia esula

Leafy spurge LI PDF
 

Euphorbia lathyris

Caper spurge, moleplant LI PDF
 

Fallopia baldschuanica

Bukhara fleeceflower, China fleece vine, silver lace vine LI PDF
 

Fallopia japonica (Hout.) Dcne. var. japonica, F. sachalinensis, F. xbohemica (Polygonum cuspidatum, P. sachalinense, P. xboehmicum)

Japanese knotweed, giant knotweed LI PDF
 

Festuca filiformis Pourret

Hair fescue LI PDF
 

Frangula alnus

Glossy buckthorn, smooth buckthorn LI PDF
 

Froelichia gracilis (Hook.) Moq.

Slender cottonweed LI PDF
 

Galega officinalis

Professor-weed, common milkpea, goat's-rue LI PDF
 

Galium odoratum L. Scop. (Asperula odorata L.)

Sweet bedstraw LI PDF
 

Gambusia affinis

Western Mosquitofish  

Gambusia holbrooki

Eastern Mosquitofish  

Geomyces destructans

White-nosed Syndrome  

Geosmithia morbida, Pityophthorus juglandis

Thousand Canker Disease, Walnut Twig Beetle  

Glaucium flavum Crantz

Yellow hornpoppy LI PDF
 

Glossostigma cleistanthum (previously reported as G. diandrum)

Mudmats LI PDF
 

Glyceria maxima (Hartm.) Holb.

Tall glyceria, English watergrass, reed mannagrass LI PDF
 

Gymnocephalus cernuus

Ruffe  

Hedera helix

English ivy LI PDF
 

Hemerocallis fulva (L.)

Orange daylily LI PDF
 

Hemigrapsus penicillatus

Grapsid Crab  

Hemigrapsus sanguineus

Asian Shore Crab  

Hemimysis anomala

Bloody Red Shrimp  

Heracleum mantegazzianum Sommier & Levier

Giant hogweed LI PDF
 

Hesperis matronalis

Dame’s rocket LI PDF
 

Hordeum murinum L. ssp. leporinum (Link) Arcang.

Leporinum barley; Hare barley LI PDF
 

Humulus japonicus Sieb. & Zucc.

Japanese hops LI PDF
 

Hydrilla verticillata

Waterthyme LI PDF
 

Hydrocharis morsus-ranae L.

Frogbit LI PDF
 

Hypericum perforatum L.

Common St. John's-wort LI PDF
 

Hypophthalmichthys harmandi

Largescale Silver Carp  

Hypophthalmichthys molitrix

Silver Carp  

Hypophthalmichthys nobilis

Bighead Carp  

Ictalurus furcatus

Blue Catfish  

Ilex crenata Thunb.

Japanese holly LI PDF
 

Impatiens glandulifera

Ornamental jewelweed LI PDF
 

Imperata cylindrica (L.) P.Beauv. (all vars. except koenigii)

Cogongrass, Cogon satin-tail  

Iris pseudacorus

Yellow iris  

Kochia scoparia (L.) Schrad. (Bassia scoparia (L.) A.J.Scott).

Mexican summer-cypress, burning bush  

Lepidium latifolium L.

Broadleaved Pepperweed, peppergrass LI PDF
 

Lepus europaeus

European Hare  

Lespedeza bicolor Turcz.

Shrub lespedeza, bicolor lespdeza, shrubby bush clover LI PDF
 

Lespedeza cuneata

Chinese lespedeza, Chinese bushclover LI PDF
 

Ligustrum amurense Caar.

Amur privet  

Ligustrum obtusifolium Siebold & Zuccarini

Border privet  

Ligustrum ovalifolium

California privet  

Ligustrum sinense

Chinese privet  

Ligustrum vulgare

European privet  

Lobelia chinensis Lour.

Chinese lobelia  

Lonicera japonica Thunberg

Japanese Honeysuckle  

Lonicera maackii (Rupr.) Maxim.

Amur Honeysuckle  

Lonicera morrowii LOMO2, L. tatarica LOTA, L. xbella LOBE

Morrow's honeysuckle, Tartarian honeysuckle, Fly honeysuckle  

Lonicera xylosteum

European Fly Honeysuckle  

Lotus corniculatus L.

Bird's-foot trefoil  

Ludwigia grandiflora (Michx.) Greuter & Burdet ssp. hexapetala (Hook. & Arn.) G.L. Nesom & Kartesz

Uruguayan Primrose-willow  

Ludwigia peploides (Kunth) Raven ssp. glabrescens (Kuntze) Raven

Floating primrose-willow  

Lymantria dispar

Asian & European Gypsy Moth  

Lysimachia clethroides Duby Planchon

Goose-neck loosestrife  

Lysimachia nummularia

Creeping Jenny, moneywort LI PDF
 

Lysimachia punctata L.

Spotted loosestrife  

Lysimachia vulgaris

Garden loosestrife, garden yellow loostrife  

Lythrum salicaria L.

Purple Loosestrife  

Marsilea quadrifolia

European water-fern  

Microstegium vimineum

Japanese stiltgrass, Eulalia, Nepalese browntop  

Miscanthus sacchariflorus (Maxim.) Hack.

Japanese Silver Grass  

Miscanthus sinensis Anderss.

Chinese silvergrass, eulalia  

Misgurnus anguillicaudatus

Oriental Weatherfish  

Monochamus alternatus

Japanese Pine Sawyer  

Monopterus albus

Asian Swamp Eel  

Morus alba

White mulberry  

Murdannia keisak (Hassk.) Hand.-Maz.

Marsh dewflower, wart-removing herb  

Myiopsitta monachus

Monk Parakeet  

Mylopharyngodon piceus

Black Carp  

Myocastor coypus

Nutria  

Myosotis scorpioides L.

True forget-me-not  

Myriophyllum aquaticum (Vellozo) Verdcourt

Parrot-feather  

Myriophyllum heterophyllum Michx. (including M. heterophyllum X M. pinnatum)

Broadleaf water-milfoil  

Myriophyllum spicatum L.

Eurasian water-milfoil  

Najas minor All.

Brittle water nymph  

Nasturtium officinale R. Br. ex Ait. (Rorippa nasturtium-aquaticum (Linnaeus) Hayek, Sched.

Watercress  

Nelumbo nucifera

Sacred lotus  

Neogobius melanostomus

Round Goby  

Nyctereutes procyonoides

Asian Racoon Dog  

Nymphoides peltata

Yellow floating heart  

Oncorhynchus kisutch

Coho Salmon  

Oncorhynchus mykiss

Rainbow Trout  

Oncorhynchus tshawytsha

Chinook Salmon  

Oplismenus hirtellus (L.) Beauv. subsp. undulatifolius (Ard.) U. Scholz

Wavyleaf basketgrass, bristle basketgrass  

Orconectes rusticus

Rusty CrayFish  

Oreochromis aureus

Blue Tilapia  

Oreochromis niloticus

Nile Tilapia  

Oryctolagus cuniculus

European Rabbit  

Paulownia tomentosa

Princess-tree LI PDF
 

Persicaria longiseta (Bruijn) Kitagawa (Polygonum caespitosum var. longiseta)

Creeping smartweed LI PDF
 

Persicaria nepalensis (Meisn.) H. Gross (=Polygonum nepalense Meisn.)

Nepal smartweed LI PDF
 

Persicaria perfoliata

Mile-a-minute weed, mile-a-minute vine LI PDF
 

Petromyzon marinus

Sea Lamprey  

Phalaris arundinacea

Reed canarygrass LI PDF
 

Phasianus colchicus, P. colchicus strachi

Ring-necked Pheasant, Sichuan Pheasant  

Phellodendron amurense

Amur corktree LI PDF
 

Phleum pratense

Timothy LI PDF
 

Phragmites australis ssp. Australis

Common reed LI PDF
 

Phyllostachys aureosulcata McClure and P. aurea Carrière ex A. Rivière and C. Rivière)

Yellow groove bamboo [grove is a misspelling] and golden bamboo LI PDF
 

Phytophthora ramorum

Sudden Oak Death  

Piaractus brachypomus

Red-bellied Pacu  

Pinellia ternata (Thunb.) Makino ex Breitenbach

Crowdipper, green dragon LI PDF
 

Pinus thunbergii

Japanese black pine LI PDF
 

Pistia stratiotes L.

Water lettuce  

Poa bulbosa L.

Bulbous bluegrass LI PDF
 

Poa compressa L.

Canada bluegrass LI PDF
 

Poa pratensis L.

Kentucky bluegrass LI PDF
 

Podarcis sicula

Italian Wall Lizard, Istanbul Lizard  

Populus alba

White poplar LI PDF
 

Potamogeton crispus L.

Curly pondweed LI PDF
 

Potamopyrgus antipodarum

New Zealand Mud Snail  

Proterorhinus semilunaris (P.marmoratus)

Tubenose Goby  

Prunus avium L.

Sweet cherry LI PDF
 

Prunus cerasus L.

Sour Cherry LI PDF
 

Prunus padus L.

European bird cherry LI PDF
 

Pseudosasa japonica (Siebold & Zucc. ex Steud.) Makino ex Nakai

Arrow bamboo LI PDF
 

Pterois miles, P. volitans

Common Lionfish, Red Lionfish  

Pueraria montana

Kudzu LI PDF
 

Pyrus calleryana

Callery pear LI PDF
 

Ranunculus ficaria

Lesser celandine, fig buttercup LI PDF
 

Ranunculus repens L.

Creeping Butter-cup LI PDF
 

Rapana venosa

Veined Rapa Whelk  

Rhamnus cathartica

Common buckthorn LI PDF
 

Rhodotypos scandens

Jetbead LI PDF
 

Robinia hispida L. (var. fertilis & hispida)

Bristly locust, mossy locust, rose acacia LI PDF
 

Robinia pseudoacacia

Black locust LI PDF
 

Rorippa amphibia L. Besser (Nasturtium amphibium L. W.T. Ait.)

Great yellowcress, water yellowcress LI PDF
 

Rosa multiflora

Multiflora rose LI PDF
 

Rosa rugosa

Rugosa rose, Japanese rose, beach rose LI PDF
 

Rubus bifrons Vest. ex Tratt. (R. armeniacus Focke; R. discolor Weihe & Nees, R. fruticosus exclusive of its type as per USDA

Himalayan blackberry LI PDF
 

Rubus laciniatus

Cutleaf Evergreen Blackberry, Evergreen blackberry LI PDF
 

Rubus phoenicolasius

Wineberry LI PDF
 

Rumex acetosella

Sheep sorrel LI PDF
 

Salix atrocinerea/cinerea

Large gray willow, European gray willow, Gray florist's willow LI PDF
 

Salmo trutta

Brown Trout  

Salvinia molesta

Water fern  

Sander lucioperca (Stizostedion lucioperca)

Zander  

Saponaria officinalis L.

Bouncing-bet, bouncing betty, soapwort LI PDF
 

Schedonorus phoenix (Scop.) Holub (S. arundinaceus (Schreb.) Dum. nom. illeg.; Festuca arundinacea Schreb. ; F. elatior L. nom. rej.; Lolium arundinaceum (Schreb.) S.J. Darbyshire)

Tall Fescue, Kentucky Fescue, Reed Fescue, Coarse Fescue, Alta Fescue LI PDF
 

Senecio jacobaea L.

Tansy-ragwort LI PDF
 

Silphium perfoliatum L. var. perfoliatum

Cup plant LI PDF
 

Sirex noctilio; Amylostereum areolatum

Sirex Woodwasp; Symbiotic Fungus  

Solanum dulcamara L. var. dulcamara

Trailing nightshade, bittersweet nightshade, climbing nightshade LI PDF
 

Sorbaria sorbifolia (L.) A. Braun

False spiraea LI PDF
 

Spiraea japonica

Japanese spiraea LI PDF
 

Stratiotes aloides L.

Water soldiers  

Styela plicata

Asian Sea Squirt  

Sus scrofa (excluding Sus scrofa domestica)

Eurasian Boar  

Syringa reticulata (Blume) H.Hara[(=S. amurensis (Rupr.) Rupr.; including S. pekinensis Rupr.]

Japanese tree lilac LI PDF
 

Tachypleus gigas, T. tridentatus, Carcinoscorpius rotundicauda

Asian Horseshoe Crabs  

Tanacetum vulgare L.

Common tansy LI PDF
 

Tilapia buttikoferi

Zebra Tilapia  

Tinca tinca

Tench  

Trachemys scripta elegans

Red-eared Slider  

Trapa natans L.

water chestnut, water caltrop LI PDF
 

Tussilago farfara L.

Coltsfoot LI PDF
 

Ulmus pumila L.

Siberian elm LI PDF
 

Valeriana officinalis

Common valerian LI PDF
 

Verbena bonariensis L. var. bonariensis

Purpletop vervain  

Veronica beccabunga L.

European speedwell LI PDF
 

Veronica officinalis L.

Common speedwell, gypsy-weed LI PDF
 

Viburnum dilatatum Thunb.

Linden arrowwood LI PDF
 

Viburnum lantana L.

Wayfaring-tree LI PDF
 

Viburnum opulus L. var. opulus

European cranberry bush, Guelder rose LI PDF
 

Viburnum setigerum

Tea viburnum LI PDF
 

Viburnum sieboldii

Siebold's arrow-wood, Sielbold's viburnum LI PDF
 

Vicia cracca L. s.l. (includes: Vicia cracca L. subsp. cracca, V. cracca subsp tenuifolia (Roth) Gaudin, V. villosa subsp pseudocracca (Bertol.) Ball, V. villosa var. varia (Host) Corb., V. villosa Roth var. villosa)

Bird vetch, cow vetch, winter vetch, bramble vetch, tufted vetch, shaggy vetch LI PDF
 

Vinca minor

Common periwinkle LI PDF
 

Vitex rotundifolia L.F.

Roundleaf chastetree, beach vitex, chasteberry, monk's pepper LI PDF
 

Wisteria sinensis/W. floribunda

Chinese wisteria/Japanese wisteria LI PDF
 

Xenopus laevis

African Clawed Frog  

Scardinius erythrophthalmus

Rudd  

 

Resources
 
New York and LIISMA Invasive Plant Invasiveness Ranking s as of March 2013