Species Information

Links to Invasive Plant Atlas of United States for images, information and national distribution maps.

Common Name Scientific Name Invasiveness Ranking Score
Japanese knotweed Fallopia japonica Sieb. & Zucc. 87
spotted knapweed Centaurea stoebe ssp. micranthos (Gugler) Hayek 86
purple loosestrife Lythrum salicaria L. 84
reed canarygrass Phalaris arundinacea L. 83
ornamental jewelweed Impatiens glandulifera Royle 82
white sweetclover Melilotus alba Medikus 80
orange hawkweed Hieracium aurantiacum L. 79
meadow hawkweed Hieracium caespitosum Dumort. 79
cheatgrass Bromus tectorum L. 78
Himalaya blackberry Rubus armeniacus Focke 77
Canada thistle Cirsium arvense (L.) Scop. 76
European bird cherry Prunus padus L. 74
bird vetch Vicia cracca L. 73
garlic mustard Alliaria petiolata (Bieb.) Cavara & Grande 70
Scotch broom Cytisus scoparius (L.) Link 69
yellow toadflax Linaria vulgaris P. Mill. 69
Siberian peashrub Caragana arborescens Lam. 66
yellow sweetclover Melilotus officinalis (L.) Lam. 65
creeping bellflower Campanula rapunculoides L. 64
yellow alfalfa Medicago sativa ssp. falcata (L.) Arcang. 64
foxtail barley Hordeum jubatum L. 63
tansy ragwort Senecio jacobaea L. 63
smooth brome Bromus inermis Leyss. 62
bull thistle Cirsium vulgare (Savi) Ten. 61
oxeye daisy Leucanthemum vulgare Lam. 61
perennial sowthistle Sonchus arvensis L. 61
leporinum barley Hordeum murinum ssp. leporinum (Link) Arcang. 60
quackgrass Elymus repens (L.) Gould 59
alfalfa Medicago sativa ssp. sativa L. 59
European mountain-ash Sorbus aucuparia L. 59
white clover Trifolium repens L. 59
field bindweed Convolvulus arvensis L. 58
common tansy Tanacetum vulgare L. 57
alsike clover Trifolium hybridum L. 57
timothy Phleum pratense L. 56
narrowleaf hawksbeard Crepis tectorum L. 54
tall buttercup Ranunculus acris L. 54
creeping buttercup Ranunculus repens L. 54
orchardgrass Dactylis glomerata L. 53
red clover Trifolium pratense L. 53
common St. Johnswort Hypericum perforatum L. 52
spreading bluegrass Poa pratensis ssp. irrigata (Lindm.) H. Lindb. 52
roughstalk bluegrass Poa trivialis L. 52
foxglove Digitalis purpurea L. 51
red sorrel Rumex acetosella L. 51
wild buckwheat Fallopia convolvulus L. 50
western salsify Tragopogon dubius Scop. 50
black medic Medicago lupulina L. 48
curly dock Rumex crispus L. 48
longleaf dock Rumex longifolius DC. 48
broadleaf dock Rumex obtusifolius L. 48
pale smartweed Persicaria lapathifolia (L.) S.F. Gray 47
ladysthumb Persicaria maculosa S.F. Gray 47
sneezewort yarrow Achillea ptarmica L. 46
narrowleaf hawkweed Hieracium umbellatum L. 46
annual bluegrass Poa annua L. 46
prostrate knotweed Polygonum aviculare L. 45
red campion Silene dioica (L.) Clairville 45
white campion Silene latifolia Poir. 45
nightflowering catchfly Silene noctiflora L. 45
European sticktight Lappula squarrosa (Retz.) Dumort. 44
broadleaf plantain Plantago major L. 44
common chickweed Stellaria pallida (Dumort.) Crépin 42
stinking chamomile Anthemis cotula L 41
flixweed Descurainia sophia (L.) Webb ex Prantl 41
damesrocket Hesperis matronalis L. 41
Italian ryegrass Lolium perenne ssp. multiflorum (Lam.) Husnot 41
shepherd's-purse Capsella bursa-pastoris (L.) Medik. 40
splitlip hempnettle Galeopsis bifida Boenn. 40
big chickweed Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet 39
Canada bluegrass Poa compressa L. 39
lambsquarters Chenopodium album L 35
common groundsel Senecio vulgaris L. 35
pineapple-weed Matricaria discoidea DC. 32
wall lettuce Mycelis muralis (L.) Dumort. 32
corn spurry Spergula arvensis L. 32
greenflower pepperweed Lepidium densiflorum Schrad. 25
boxelder Acer negundo L.
fernleaf yarrow Achillea filipendulina Lam.
bishops goutweed Aegopodium podagraria L.
crested wheatgrass Agropyron cristatum (L.) Gaertn.
Siberian wheatgrass Agropyron fragile (Roth) P. Candargy
colonial bentgrass Agrostis capillaris L.
redtop Agrostis gigantea Roth
creeping bentgrass Agrostis stolonifera L.
silver hairgrass Aira caryophyllea L.
lady's-mantle Alchemilla mollis (Buser) Rothm.
water foxtail Alopecurus geniculatus L.
meadow foxtail Alopecurus pratensis Linnaeus
tumble pigweed Amaranthus albus L
redroot pigweed Amaranthus retroflexus L.
common fiddleneck Amsinckia menziesii var. intermedia (Fisch. & C.A. Mey.) Ganders
sweet vernalgrass Anthoxanthum odoratum L.
tower-mustard Arabis glabra (L.) Bernh.
common burdock Arctium minus Bernh.
tall oatgrass Arrhenatherum elatius (L.) Beauv. ex J.& K. Presl
biennial wormwood Artemisia biennis Willd
catchweed Asperugo procumbens L.
chickpea milkvetch Astragalus cicer L.
halberdleaf orach Atriplex patula L.
wild oat Avena fatua L.
oat Avena sativa L.
hoary alyssum Berteroa incana (L.) DC
European white birch Betula pendula Roth
Indian mustard Brassica juncea (L.) Czern
rapeseed Brassica napus L.
birdsrape mustard Brassica rapa L.
soft brome Bromus hordeaceus L.
rye brome Bromus secalinus L.
pot marigold Calendula officinalis L.
hedge false bindweed Calystegia sepium ssp. sepium (L.) R. Br.
smallseed falseflax Camelina microcarpa DC.
largeseed falseflax Camelina sativa (L.) Crantz
Canterbury bells Campanula medium L.
perennial cornflower Centaurea montana L.
sticky chickweed Cerastium glomeratum Thuill.
boreal chickweed Cerastium tomentosum L.
dwarf snapdragon Chaenorhinum minus (L.) Lange
chicory Cichorium intybus L.
orange-peel clematis Clematis tangutica (Maxim.) Korsh.
tiny trumpet Collomia linearis Nutt.
smooth hawksbeard Crepis capillaris (L.) Wallr
Queen Anne's lace, wild carrot Daucus carota L.
annual hairgrass Deschampsia danthonioides (Trin.) Munro
slender hairgrass Deschampsia elongata (Hook.) Munro
maiden pink Dianthus deltoides L.
thyme-flowered dragonhead Dracocephalum thymiflorum L.
Siberian wildrye Elymus sibiricus L.
redstem filaree Erodium cicutarium (L.) L'Hér. ex Ait.
dog mustard Erucastrum gallicum (Willd.) O.E. Schulz
leafy spurge Euphorbia esula L.
common eyebright Euphrasia nemorosa (Pers.) Wallr.
buckwheat Fagopyrum esculentum Moench
Sakhalin knotweed Fallopia sachalinensis F. Schmidt ex Maxim.
tall fescue Festuca arundinacea Schreb.
hard fescue Festuca brevipila Tracey
meadow fescue Festuca pratensis Huds.
blanketflower Gaillardia aristata Pursh
common hempnettle Galeopsis tetrahit L.
herb-robert Geranium robertianum L.
ground ivy Glechoma hederacea L.
western marsh cudweed Gnaphalium palustre Nutt.
low cudweed Gnaphalium uliginosum L.
showy baby's-breath Gypsophila elegans M. Bieb.
English ivy Hedera helix L.
common sunflower Helianthus annuus L.
common hawkweed Hieracium lachenalii K.C. Gmel.
mouseear hawkweed Hieracium pilosella L.
common velvetgrass Holcus lanatus L.
barley Hordeum vulgare L.
hairy cat's ear Hypochaeris radicata L.
English holly Ilex aquifolium L.
yellowflag iris Iris pseudacorus L.
prickly lettuce Lactuca serriola L.
white deadnettle Lamium album L.
henbit Lamium amplexicaule L.
nipplewort Lapsana communis L.
fall hawkbit Leontodon autumnalis L.
bristly hawkbit Leontodon hispidus L.
manybranched pepperweed Lepidium ramosissimum A. Nelson
garden cress Lepidium sativum L.
max chrysanthemum Leucanthemum maximum (Ramond) DC.
Altai wildrye Leymus angustus (Trin.) Pilg.
Dalmatian toadflax Linaria dalmatica (L.) P. Mill.
pineneedle toadflax Linaria pinifolia (Poir.) Thell.
perennial ryegrass Lolium perenne ssp. perenne L.
poison ryegrass Lolium temulentum L.
Tatarian honeysuckle Lonicera tatarica L.
birdsfoot trefoil Lotus corniculatus L.
bigleaf lupine Lupinus polyphyllus Lindl.
moneywort Lysimachia nummularia L.
cluster tarweed Madia glomerata Hook.
common mallow Malva neglecta Wallr.
Matricaria inodora L.
little burclover Medicago minima (L.) L.
true forget-me-not Myosotis scorpioides L.
woodland forget-me-not Myosotis sylvatica Ehrh. ex Hoffmann
Eurasian watermilfoil Myriophyllum spicatum Linnaeus
anise Myrrhis odorata (L.) Scop.
ball mustard Neslia paniculata (L.) Desv.
sainfoin Onobrychis viciifolia Scop.
Icelandic poppy Papaver nudicaule L.
corn poppy Papaver rhoeas L.
wild parsnip Pastinaca sativa L.
cultivated knotweed Persicaria wallichii Greuter & Burdet
canarygrass Phalaris canariensis L.
buckhorn plantain Plantago lanceolata L.
Bohemian knotweed Polygonum x bohemicum (J. Chrtek & Chrtkovß) Zika & Jacobson [cuspidatum x sachalinense]
biennial cinquefoil Potentilla biennis Greene
sweet cherry Prunus avium (L.) L.
common chokecherry Prunus virginiana L.
Russian wildrye Psathyrostachys juncea (Fisch.) Nevski
longleaf speedwell Pseudolysimachion longifolium (L.) Opiz
radish Raphanus sativus L.
garden rhubarb Rheum rhabarbarum L.
yellow fieldcress Rorippa sylvestris (L.) Bess.
Seaside rose Rosa rugosa Thunb.
garden sorrel Rumex acetosa ssp. acetosa L.
field dock Rumex pseudonatronatus Borbás
birdseye pearlwort Sagina procumbens L.
cereal rye Secale cereale L.
crownvetch Securigera varia (L.) Lassen
Columbia ragwort Senecio integerrimus var. exaltatus (Nutt.) Cronquist
woodland groundsel Senecio sylvaticus L.
sticky groundsel Senecio viscosus L.
green foxtail Setaria viridis (L.) Beauv.
garden catchfly Silene armeria L.
maltese-cross Silene chalcedonica (L.) E. H. L. Krause
bladder campion Silene latifolia ssp. alba (Mill.) Greuter & Burdet
bladder campion Silene vulgaris (Moench) Garcke
white mustard Sinapis alba L.
wild mustard Sinapis arvensis L.
tumble mustard Sisymbrium altissimum L.
moist sowthistle Sonchus arvensis ssp. uliginosus (M. Bieb.) Nyman
spiny sowthistle Sonchus asper (L.) Hill
annual sowthistle Sonchus oleraceus L.
false spiraea Sorbaria sorbifolia (L.) A. Braun
red sandspurry Spergularia rubra (L.) J. Presl & C. Presl
common comfrey Symphytum officinale L.
rock dandelion Taraxacum laevigatum (Willd.) DC.
common dandelion Taraxacum officinale ssp. officinale F.H. Wigg.
intermediate wheatgrass Thinopyrum intermedium (Host) Barkworth & D.R. Dewey
tall wheatgrass Thinopyrum ponticum (Podp.) Z.-W. Liu & R.-C. Wang
field pennycress Thlaspi arvense L.
hop clover Trifolium aureum Pollich
small hop clover Trifolium dubium Sibthorp
common wheat Triticum aestivum L.
European globeflower Trollius europeus L.
burning nettle Urtica urens L.
cowcockle Vaccaria hispanica (P. Mill.)
common valerian Valeriana officinalis L.
neckweed Veronica peregrina ssp. peregrina L.
thymeleaf speedwell Veronica serpyllifolia ssp. serpyllifolia L.
spiked speedwell Veronica spicata L.
European cranberrybush Viburnum opulus L.
garden vetch Vicia sativa ssp. nigra (L.) Ehrh.
hairy vetch Vicia villosa Roth
pansy Viola tricolor L.
rattail fescue Vulpia myuros (L.) K.C. Gmel.


Bugwood Center Developed by The University of Georgia - Center for Invasive Species and Ecosystem Health.
Last updated on Friday, October 23, 2009 at 04:39 PM