| African tuliptree |
Spathodea campanulata |
2 |
| air-potato |
Dioscorea bulbifera |
3 |
| alligatorweed |
Alternanthera philoxeroides |
3 |
| Amur honeysuckle |
Lonicera maackii |
2 |
| Amur peppervine |
Ampelopsis brevipedunculata |
2 |
| Asian nakedwood |
Colubrina asiatica |
3 |
| Athel tamarisk |
Tamarix aphylla |
4 |
| Australian redcedar |
Toona ciliata |
1 |
| Australian saltbush |
Atriplex semibaccata |
3 |
| Australian teatree |
Leptospermum laevigatum |
2 |
| Australian-pine |
Casuarina equisetifolia |
3 |
| autumn-olive |
Elaeagnus umbellata |
1 |
| banana passionflower |
Passiflora tripartita var. mollissima |
1 |
| banana poka |
Passiflora tarminiana |
2 |
| barb goatgrass |
Aegilops triuncialis |
1 |
| barberry |
Berberis spp. |
6 |
| beardgrass |
Bothriochloa spp. |
3 |
| bermudagrass |
Cynodon dactylon |
2 |
| big periwinkle |
Vinca major |
2 |
| big quakinggrass |
Briza maxima |
1 |
| birdsfoot trefoil |
Lotus corniculatus |
3 |
| bishops goutweed |
Aegopodium podagraria |
1 |
| bittersweet nightshade |
Solanum dulcamara |
1 |
| Black dog-strangling vine, black swallowwort |
Cynanchum louiseae |
1 |
| black locust |
Robinia pseudoacacia |
11 |
| black mustard |
Brassica nigra |
1 |
| blessed milkthistle |
Silybum marianum |
5 |
| bloodberry |
Rivina humilis |
1 |
| blue and white daisybush |
Osteospermum ecklonis |
1 |
| bluestem |
Andropogon gayanus |
2 |
| bouncingbet |
Saponaria officinalis |
4 |
| Brazilian peppertree |
Schinus terebinthifolius |
4 |
| broomleaf toadflax |
Linaria genistifolia |
5 |
| broomsedge bluestem |
Andropogon virginicus |
6 |
| buffelgrass |
Pennisetum ciliare |
4 |
| bull thistle |
Cirsium vulgare |
6 |
| bur chervil |
Anthriscus caucalis |
3 |
| buttercup oxalis |
Oxalis pes-caprae |
1 |
| butterflybush |
Buddleja davidii |
5 |
| calla lily |
Zantedeschia aethiopica |
9 |
| camelthorn |
Alhagi maurorum |
9 |
| Canada thistle |
Cirsium arvense |
6 |
| cape ivy |
Delairea odorata |
4 |
| capeweed |
Arctotheca calendula |
2 |
| cardoon |
Cynara cardunculus |
4 |
| carpobrotus |
Carpobrotus spp. |
1 |
| castorbean |
Ricinus communis |
3 |
| cat's ear |
Hypochaeris spp. |
3 |
| catalpa |
Catalpa spp. |
1 |
| cheatgrass |
Bromus tectorum |
10 |
| chinaberry |
Melia azedarach |
7 |
| Chinese silvergrass |
Miscanthus sinensis |
1 |
| Chinese tallowtree |
Triadica sebifera |
7 |
| cogongrass |
Imperata cylindrica |
3 |
| colonial bentgrass |
Agrostis capillaris |
1 |
| common bugloss |
Anchusa officinalis |
4 |
| common burdock |
Arctium minus |
4 |
| common cocklebur |
Xanthium strumarium |
4 |
| common mullein |
Verbascum thapsus |
8 |
| common reed |
Phragmites australis |
5 |
| common salsify |
Tragopogon porrifolius |
1 |
| common St. Johnswort |
Hypericum perforatum |
3 |
| common tarweed |
Centromadia pungens ssp. pungens |
12 |
| common teasel |
Dipsacus fullonum |
1 |
| common velvetgrass |
Holcus lanatus |
5 |
| corkystemmed passionflower |
Passiflora suberosa |
4 |
| cornflower |
Centaurea cyanus |
1 |
| creeping waterprimrose |
Ludwigia peploides |
2 |
| crested wheatgrass |
Agropyron cristatum |
2 |
| crimson fountaingrass |
Pennisetum setaceum |
9 |
| croftonweed |
Ageratina adenophora |
4 |
| crystalline iceplant |
Mesembryanthemum crystallinum |
2 |
| curly dock |
Rumex crispus |
4 |
| desert wheatgrass |
Agropyron desertorum |
1 |
| dog-strangling vine, European swallowwort |
Cynanchum rossicum |
6 |
| Double Impatiens |
Impatiens walleriana |
1 |
| Dyer's woad |
Isatis tinctoria |
1 |
| edible fig |
Ficus carica |
5 |
| elephant grass |
Pennisetum purpureum |
1 |
| English ivy |
Hedera helix |
1 |
| European beachgrass |
Ammophila arenaria |
10 |
| European blackberry |
Rubus fruticosus |
2 |
| European buckthorn |
Rhamnus cathartica |
8 |
| exotic bush honeysuckles |
Lonicera spp. |
9 |
| fennel |
Foeniculum vulgare |
9 |
| field bindweed |
Convolvulus arvensis |
3 |
| field brome |
Bromus arvensis |
1 |
| flowering rush |
Butomus umbellatus |
2 |
| fountaingrass |
Pennisetum spp. |
1 |
| freesia |
Freesia spp. |
4 |
| French broom |
Genista monspessulana |
5 |
| Fuller's teasel |
Dipsacus fullonum ssp. sylvestris |
1 |
| garlic mustard |
Alliaria petiolata |
8 |
| giant reed |
Arundo donax |
12 |
| glossy buckthorn |
Frangula alnus |
7 |
| goatsbeard |
Tragopogon spp. |
2 |
| Gold Coast jasmine |
Jasminum dichotomum |
2 |
| gorse |
Ulex europaeus |
8 |
| great burdock |
Arctium lappa |
2 |
| heather |
Calluna vulgaris |
11 |
| herb-robert |
Geranium robertianum |
1 |
| highbush blackberry |
Rubus argutus |
4 |
| Himalaya blackberry |
Rubus armeniacus |
12 |
| Himalayan honeysuckle |
Leycesteria formosa |
4 |
| hiptage |
Hiptage benghalensis |
4 |
| hoary alyssum |
Berteroa incana |
3 |
| hoary cress |
Lepidium draba |
3 |
| honeylocust |
Gleditsia triacanthos |
1 |
| hottentot fig |
Carpobrotus edulis |
1 |
| houndstongue |
Cynoglossum officinale |
4 |
| hydrilla |
Hydrilla verticillata |
1 |
| Italian plumeless thistle |
Carduus pycnocephalus |
3 |
| Japanese angelica tree |
Aralia elata |
5 |
| Japanese climbing fern |
Lygodium japonicum |
3 |
| Japanese honeysuckle |
Lonicera japonica |
6 |
| Japanese hop |
Humulus japonicus |
2 |
| Japanese stiltgrass |
Microstegium vimineum |
7 |
| jazmin de trapo |
Jasminum fluminense |
2 |
| johnsongrass |
Sorghum halepense |
2 |
| Kahila garland-lily |
Hedychium gardnerianum |
4 |
| largeleaf lantana |
Lantana camara |
3 |
| leafy spurge |
Euphorbia esula |
6 |
| Lehmann lovegrass |
Eragrostis lehmanniana |
2 |
| lesser celandine, fig buttercup |
Ficaria verna |
3 |
| Malta starthistle |
Centaurea melitensis |
2 |
| Mediterranean grass |
Schismus spp. |
3 |
| medusahead |
Taeniatherum caput-medusae |
3 |
| melaleuca |
Melaleuca quinquenervia |
4 |
| Mexican fireweed |
Kochia scoparia |
4 |
| miconia |
Miconia calvescens |
4 |
| molassesgrass |
Melinis minutiflora |
5 |
| moneywort |
Lysimachia nummularia |
2 |
| montbretia |
Crocosmia x crocosmiiflora |
2 |
| Morrow's honeysuckle |
Lonicera morrowii |
6 |
| moth mullein |
Verbascum blattaria |
2 |
| mouse barley |
Hordeum murinum |
2 |
| multiflora rose |
Rosa multiflora |
7 |
| musk thistle |
Carduus nutans |
7 |
| mustard |
Brassica spp. |
3 |
| nasturtium |
Tropaeolum majus |
1 |
| Norway maple |
Acer platanoides |
3 |
| old world climbing fern |
Lygodium microphyllum |
1 |
| olive |
Olea europaea |
1 |
| onionweed |
Asphodelus fistulosus |
2 |
| orbicular whitetop |
Lepidium chalepense |
3 |
| oriental bittersweet |
Celastrus orbiculatus |
5 |
| oriental mustard |
Sisymbrium orientale |
3 |
| pampas grass |
Cortaderia spp. |
3 |
| papaya |
Carica papaya |
2 |
| parrot feather milfoil |
Myriophyllum aquaticum |
5 |
| pennyroyal |
Mentha pulegium |
3 |
| perennial pepperweed |
Lepidium latifolium |
3 |
| perennial sowthistle |
Sonchus arvensis |
1 |
| Peruvian peppertree |
Schinus molle |
2 |
| poison-hemlock |
Conium maculatum |
1 |
| prickly lettuce |
Lactuca serriola |
3 |
| pricklypear/cholla |
Opuntia spp. |
5 |
| pride of Madeira |
Echium candicans |
3 |
| princess-flower |
Tibouchina urvilleana |
2 |
| princesstree |
Paulownia tomentosa |
2 |
| puncturevine |
Tribulus terrestris |
3 |
| purple loosestrife |
Lythrum salicaria |
8 |
| purple pampasgrass |
Cortaderia jubata |
5 |
| radish |
Raphanus sativus |
1 |
| red brome |
Bromus rubens |
5 |
| red sesbania |
Sesbania punicea |
3 |
| reed canarygrass |
Phalaris arundinacea |
8 |
| rose myrtle |
Rhodomyrtus tomentosa |
1 |
| rush skeletonweed |
Chondrilla juncea |
2 |
| Russian knapweed |
Rhaponticum repens |
10 |
| Russian-olive |
Elaeagnus angustifolia |
4 |
| salsola |
Salsola spp. |
1 |
| saltcedar |
Tamarix ramosissima |
7 |
| satintail |
Imperata spp. |
2 |
| Scotch broom |
Cytisus scoparius |
1 |
| Scotch thistle |
Onopordum acanthium |
6 |
| sericea lespedeza |
Lespedeza cuneata |
2 |
| shamel ash |
Fraxinus uhdei |
5 |
| shoebutton ardisia |
Ardisia elliptica |
2 |
| Siberian elm |
Ulmus pumila |
5 |
| Siberian peashrub |
Caragana arborescens |
2 |
| skunk-vine |
Paederia foetida |
2 |
| slenderleaf iceplant |
Mesembryanthemum nodiflorum |
1 |
| smallflower tamarisk |
Tamarix parviflora |
7 |
| smooth brome |
Bromus inermis |
5 |
| smooth cordgrass |
Spartina alterniflora |
3 |
| soft brome |
Bromus hordeaceus |
2 |
| southern catalpa |
Catalpa bignonioides |
2 |
| Spanish arborvine |
Merremia tuberosa |
1 |
| Spanish broom |
Spartium junceum |
5 |
| spiny cocklebur |
Xanthium spinosum |
2 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
6 |
| spreading liverseed grass |
Urochloa decumbens |
1 |
| Standish's honeysuckle |
Lonicera standishii |
1 |
| stinking chamomile |
Anthemis cotula |
3 |
| swainsonpea |
Sphaerophysa salsula |
1 |
| sweet vernalgrass |
Anthoxanthum odoratum |
2 |
| Sycamore maple |
Acer pseudoplatanus |
1 |
| Sydney bluegum |
Eucalyptus saligna |
3 |
| tall fescue |
Festuca arundinacea |
3 |
| tall vervain |
Verbena bonariensis |
2 |
| tamarisk |
Tamarix spp. |
14 |
| tansy ragwort |
Senecio jacobaea |
2 |
| Tasmanian bluegum |
Eucalyptus globulus |
4 |
| Tatarian honeysuckle |
Lonicera tatarica |
3 |
| timothy |
Phleum pratense |
2 |
| tree marigold |
Tithonia diversifolia |
1 |
| tree tobacco |
Nicotiana glauca |
6 |
| tree-of-heaven |
Ailanthus altissima |
10 |
| tropical soda apple |
Solanum viarum |
1 |
| tumble pigweed |
Amaranthus albus |
1 |
| ventenata |
Ventenata dubia |
1 |
| water-chestnut |
Trapa natans |
4 |
| waterhyacinth |
Eichhornia crassipes |
1 |
| weeping lovegrass |
Eragrostis curvula |
1 |
| West Indian raspberry |
Rubus rosifolius |
1 |
| western salsify |
Tragopogon dubius |
2 |
| white horehound |
Marrubium vulgare |
2 |
| white leadtree |
Leucaena leucocephala |
3 |
| white mulberry |
Morus alba |
2 |
| white ramping fumitory |
Fumaria capreolata |
2 |
| wild mustard |
Sinapis arvensis |
1 |
| wild oat |
Avena fatua |
3 |
| wild parsnip |
Pastinaca sativa |
3 |
| willow |
Salix spp. |
3 |
| wine raspberry |
Rubus phoenicolasius |
4 |
| yellow bluestem |
Bothriochloa ischaemum |
1 |
| yellow bush lupine |
Lupinus arboreus |
11 |
| yellow glandweed |
Parentucellia viscosa |
2 |
| yellow starthistle |
Centaurea solstitialis |
4 |
| yellow sweetclover |
Melilotus officinalis |
9 |
| yellow toadflax |
Linaria vulgaris |
5 |
| yellowflag iris |
Iris pseudacorus |
4 |
