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
dandelion Taraxacum officinale G.H. Weber ex Wiggers 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
Kentucky bluegrass Poa pratensis ssp. pratensis 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
scentless false mayweed Tripleurospermum perforatum (Merat) M. Lainz 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
fernleaf yarrow Achillea filipendulina Lam.
common yarrow Achillea millefolium L.
bishops goutweed Aegopodium podagraria L.
crested wheatgrass Agropyron cristatum (L.) Gaertn.
colonial bentgrass Agrostis capillaris L.
redtop Agrostis gigantea Roth
creeping bentgrass Agrostis stolonifera L.
lady's-mantle Alchemilla mollis (Buser) Rothm.
water foxtail Alopecurus geniculatus L.
meadow foxtail Alopecurus pratensis Linnaeus
redroot pigweed Amaranthus retroflexus L.
pearly everlasting Anaphalis margaritacea (L.) Benth.
sweet vernalgrass Anthoxanthum odoratum L.
tower-mustard Arabis glabra (L.) Bernh.
common burdock Arctium minus Bernh.
silverweed cinquefoil Argentina anserina (L.) Rydb.
tall oatgrass Arrhenatherum elatius (L.) Beauv. ex J.& K. Presl
catchweed Asperugo procumbens L.
chickpea milkvetch Astragalus cicer L.
wild oat Avena fatua 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.
turnip Brassica rapa ssp. 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.
perennial cornflower Centaurea montana L.
sticky chickweed Cerastium glomeratum Thuill.
boreal chickweed Cerastium tomentosum L.
dwarf snapdragon Chaenorhinum minus (L.) Lange
Zschack's goosefoot Chenopodium berlandieri var. zschackii (Murr) Murr ex Asch.
chicory Cichorium intybus L.
tiny trumpet Collomia linearis Nutt.
horseweed Conyza canadensis (L.) Cronq.
Queen Anne's lace, wild carrot Daucus carota L.
low larkspur Delphinium nuttallianum Pritz. ex Walp.
slender hairgrass Deschampsia elongata (Hook.) Munro
pinnate tansymustard Descurainia pinnata (Walt.) Britt
maiden pink Dianthus deltoides L.
Siberian wildrye Elymus sibiricus L.
slender wheatgrass Elymus trachycaulus ssp. subsecundus (Link) A. Löve & D. Löve
slender wheatgrass Elymus trachycaulus ssp. trachycaulus (Link) Gould ex Shinners
redstem filaree Erodium cicutarium (L.) L'Hér. ex Ait.
dog mustard Erucastrum gallicum (Willd.) O.E. Schulz
wallflower mustard Erysimum cheiranthoides L
common eyebright Euphrasia nemorosa (Pers.) Wallr.
Sakhalin knotweed Fallopia sachalinensis F. Schmidt ex Maxim.
tall fescue Festuca arundinacea Schreb.
meadow fescue Festuca pratensis Huds.
strawberry Fragaria x ananassa Duchesne ex Rozier [chiloensis × virginiana]
common hempnettle Galeopsis tetrahit L.
herb-robert Geranium robertianum L.
western marsh cudweed Gnaphalium palustre Nutt.
low cudweed Gnaphalium uliginosum L.
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.
German velvetgrass Holcus mollis L.
barley Hordeum vulgare L.
hairy cat'sear Hypochaeris radicata L.
English holly Ilex aquifolium L.
yellowflag iris Iris pseudacorus L.
prickly lettuce Lactuca serriola L.
white deadnettle Lamium album L.
nipplewort Lapsana communis L.
fall hawkbit Leontodon autumnalis L.
lesser hawkbit Leontodon saxatilis ssp. saxatilis L.
manybranched pepperweed Lepidium ramosissimum A. Nelson
max chrysanthemum Leucanthemum maximum (Ramond) DC.
pineneedle toadflax Linaria pinifolia (Poir.) Thell.
perennial ryegrass Lolium perenne ssp. perenne L.
birdsfoot trefoil Lotus corniculatus L.
bigleaf lupine Lupinus polyphyllus Lindl.
maltese-cross Lychnis chalcedonica L.
moneywort Lysimachia nummularia L.
cluster tarweed Madia glomerata Hook.
little burclover Medicago minima (L.) L.
spearmint Mentha spicata L.
true forget-me-not Myosotis scorpioides L.
woodland forget-me-not Myosotis sylvatica Ehrh. ex Hoffmann
anise Myrrhis odorata (L.) Scop.
ball mustard Neslia paniculata (L.) Desv.
Icelandic poppy Papaver nudicaule L.
corn poppy Papaver rhoeas L.
canarygrass Phalaris canariensis L.
buckhorn plantain Plantago lanceolata L.
glaucous bluegrass Poa glauca Vahl
fowl bluegrass Poa palustris L.
Kentucky bluegrass Poa pratensis L.
Bohemian knotweed Polygonum x bohemicum (J. Chrtek & Chrtkovß) Zika & Jacobson [cuspidatum x sachalinense]
rough cinquefoil Potentilla norvegica L.
sweet cherry Prunus avium (L.) L.
radish Raphanus sativus L.
garden rhubarb Rheum rhabarbarum L.
yellow fieldcress Rorippa sylvestris (L.) Bess.
rugosa rose Rosa rugosa Thunb.
garden sorrel Rumex acetosa ssp. acetosa L.
birdseye pearlwort Sagina procumbens L.
crownvetch Securigera varia (L.) Lassen
woodland groundsel Senecio sylvaticus L.
sticky groundsel Senecio viscosus L.
green foxtail Setaria viridis (L.) Beauv.
garden catchfly Silene armeria L.
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.
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.
common dandelion Taraxacum officinale ssp. officinale F.H. Wigg.
field pennycress Thlaspi arvense L.
hop clover Trifolium aureum Pollich
small hop clover Trifolium dubium Sibthorp
common wheat Triticum aestivum L.
neckweed Veronica peregrina ssp. peregrina L.
thymeleaf speedwell Veronica serpyllifolia ssp. serpyllifolia L.
European cranberrybush Viburnum opulus L.
pansy Viola tricolor L.


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