| African mustard |
Brassica tournefortii |
1 |
| alkali mallow |
Malvella leprosa |
1 |
| alkaliweed |
Cressa truxillensis |
2 |
| alpine knapweed |
Centaurea nigrescens |
1 |
| American burnweed |
Erechtites hieraciifolius |
1 |
| American yellow rocket |
Barbarea orthoceras |
1 |
| annual bursage |
Ambrosia acanthicarpa |
1 |
| annual pearlwort |
Sagina apetala |
2 |
| annual sowthistle |
Sonchus oleraceus |
1 |
| annual wormwood |
Artemisia annua |
1 |
| arrowleaf sida |
Sida rhombifolia |
1 |
| Asian ponysfoot |
Dichondra micrantha |
1 |
| Australian burnweed |
Erechtites minimus |
2 |
| Australian saltbush |
Atriplex semibaccata |
1 |
| Austrian fieldcress |
Rorippa austriaca |
1 |
| babysbreath |
Gypsophila paniculata |
1 |
| barbwire Russian-thistle |
Salsola paulsenii |
1 |
| bellardia |
Bellardia trixago |
2 |
| biennial wormwood |
Artemisia biennis |
2 |
| big sagebrush |
Artemisia tridentata |
2 |
| birdseye pearlwort |
Sagina procumbens |
1 |
| birdsrape mustard |
Brassica rapa |
1 |
| bitter lettuce |
Lactuca virosa |
1 |
| black henbane |
Hyoscyamus niger |
1 |
| black mustard |
Brassica nigra |
1 |
| bladder campion |
Silene latifolia ssp. alba |
1 |
| blessed milkthistle |
Silybum marianum |
2 |
| blue morningglory |
Ipomoea indica |
1 |
| blue mustard |
Chorispora tenella |
1 |
| Boccone's sandspurry |
Spergularia bocconii |
1 |
| bouncingbet |
Saponaria officinalis |
1 |
| brassbuttons |
Cotula coronopifolia |
2 |
| brightblue speedwell |
Veronica serpyllifolia ssp. humifusa |
1 |
| bristly hawksbeard |
Crepis setosa |
1 |
| bristly mallow |
Modiola caroliniana |
1 |
| bristly oxtongue |
Helminthotheca echioides |
1 |
| broadleaf dock |
Rumex obtusifolius |
1 |
| broadleaf filaree |
Erodium botrys |
2 |
| broadleaf forget-me-not |
Myosotis latifolia |
1 |
| broadleaf plantain |
Plantago major |
2 |
| buckhorn plantain |
Plantago coronopus |
1 |
| buffalo gourd |
Cucurbita foetidissima |
1 |
| bull mallow |
Malva nicaeensis |
1 |
| bull thistle |
Cirsium vulgare |
1 |
| bur beggarticks |
Bidens tripartita |
1 |
| bur chervil |
Anthriscus caucalis |
1 |
| burning nettle |
Urtica urens |
1 |
| buttercup oxalis |
Oxalis pes-caprae |
1 |
| California mugwort |
Artemisia douglasiana |
1 |
| cape ivy |
Delairea odorata |
1 |
| capeweed |
Arctotheca calendula |
3 |
| cardoon |
Cynara cardunculus |
1 |
| carpetweed |
Mollugo verticillata |
1 |
| chicory |
Cichorium intybus |
1 |
| Chinese thorn-apple |
Datura quercifolia |
1 |
| citronmelon |
Citrullus lanatus var. citroides |
1 |
| clammy goosefoot |
Dysphania pumilio |
1 |
| clasping heliotrope |
Heliotropium amplexicaule |
1 |
| clasping pepperweed |
Lepidium perfoliatum |
1 |
| common beet |
Beta vulgaris |
1 |
| common borage |
Borago officinalis |
1 |
| common chickweed |
Stellaria pallida |
1 |
| common cocklebur |
Xanthium strumarium |
2 |
| common comfrey |
Symphytum officinale |
1 |
| common fiddleneck |
Amsinckia menziesii var. intermedia |
2 |
| common mallow |
Malva neglecta |
1 |
| common mouse-ear chickweed |
Cerastium fontanum |
1 |
| common mullein |
Verbascum thapsus |
2 |
| common pokeweed |
Phytolacca americana |
1 |
| common purslane |
Portulaca oleracea |
1 |
| common ragweed |
Ambrosia artemisiifolia |
1 |
| common salsify |
Tragopogon porrifolius |
1 |
| common St. Johnswort |
Hypericum perforatum |
1 |
| common sunflower |
Helianthus annuus |
1 |
| common tansy |
Tanacetum vulgare |
1 |
| common tarweed |
Centromadia pungens ssp. pungens |
1 |
| common teasel |
Dipsacus fullonum |
1 |
| common yarrow |
Achillea millefolium |
1 |
| coppery mesemb |
Malephora crocea |
1 |
| corn spurry |
Spergula arvensis |
1 |
| cornflower |
Centaurea cyanus |
1 |
| Cornish mallow |
Lavatera cretica |
1 |
| Coulter's horseweed |
Laennecia coulteri |
2 |
| coyote tobacco |
Nicotiana attenuata |
1 |
| creeping buttercup |
Ranunculus repens |
1 |
| creeping woodsorrel |
Oxalis corniculata |
1 |
| crimson woodsorrel |
Oxalis incarnata |
1 |
| croftonweed |
Ageratina adenophora |
2 |
| crystalline iceplant |
Mesembryanthemum crystallinum |
1 |
| Cucamonga manroot |
Marah macrocarpus |
1 |
| cultivated knotweed |
Persicaria wallichii |
1 |
| curlycup gumweed |
Grindelia squarrosa var. serrulata |
2 |
| cutleaf burnweed |
Erechtites glomeratus |
2 |
| cutleaf evening-primrose |
Oenothera laciniata |
2 |
| cutleaf geranium |
Geranium dissectum |
1 |
| cutleaf goosefoot |
Chenopodium multifidum |
1 |
| cutleaf nightshade |
Solanum triflorum |
1 |
| dalmatian toadflax |
Linaria dalmatica ssp. dalmatica |
1 |
| dandelion |
Taraxacum officinale |
2 |
| dense mistletoe |
Phoradendron densum |
1 |
| devil's-claw |
Proboscidea louisianica |
1 |
| diffuse knapweed |
Centaurea diffusa |
1 |
| Drummond's beeblossom |
Gaura drummondii |
1 |
| dwarf St. Johnswort |
Hypericum mutilum |
1 |
| Dyer's woad |
Isatis tinctoria |
2 |
| earleaf nightshade |
Solanum mauritianum |
1 |
| early wintercress |
Barbarea verna |
1 |
| English daisy |
Bellis perennis |
1 |
| English holly |
Ilex aquifolium |
1 |
| English ivy |
Hedera helix |
1 |
| European heliotrope |
Heliotropium europaeum |
1 |
| featherleaf pepperweed |
Lepidium pinnatifidum |
1 |
| fennel |
Foeniculum vulgare |
1 |
| feverfew |
Tanacetum parthenium |
2 |
| fiddleleaf dock |
Rumex pulcher |
1 |
| field dodder |
Cuscuta pentagona |
1 |
| field madder |
Sherardia arvensis |
1 |
| field marigold |
Calendula arvensis |
1 |
| field pennycress |
Thlaspi arvense |
1 |
| field pepperweed |
Lepidium campestre |
1 |
| Fitch's tarweed |
Hemizonia fitchii |
2 |
| fivehook bassia |
Bassia hyssopifolia |
1 |
| flixweed |
Descurainia sophia |
2 |
| floating pennywort |
Hydrocotyle ranunculoides |
1 |
| foxglove |
Digitalis purpurea |
2 |
| fringed willowherb |
Epilobium ciliatum ssp. ciliatum |
1 |
| glandular Cape marigold |
Dimorphotheca sinuata |
1 |
| Great Valley gumweed |
Grindelia camporum var. camporum |
1 |
| greater ammi |
Ammi majus |
1 |
| greater swinecress |
Coronopus squamatus |
1 |
| hairy beggarticks |
Bidens pilosa |
1 |
| hairy bittercress |
Cardamine hirsuta |
2 |
| hairy buttercup |
Ranunculus sardous |
1 |
| hairy cat's ear |
Hypochaeris radicata |
1 |
| hairy fleabane |
Conyza bonariensis |
1 |
| hairy galinsoga |
Galinsoga quadriradiata |
1 |
| hairy nightshade |
Solanum physalifolium |
1 |
| hairy purslane speedwell |
Veronica peregrina ssp. xalapensis |
1 |
| hairy whitetop |
Cardaria pubescens |
1 |
| halogeton |
Halogeton glomeratus |
2 |
| hedge mustard |
Sisymbrium officinale |
2 |
| hedgeparsley |
Torilis arvensis |
2 |
| henbit |
Lamium amplexicaule |
1 |
| herb-robert |
Geranium robertianum |
2 |
| high mallow |
Malva sylvestris |
1 |
| hoary cress |
Lepidium draba |
1 |
| Hooker's evening primrose |
Oenothera elata ssp. hookeri |
1 |
| horse purslane |
Trianthema portulacastrum |
1 |
| horsenettle |
Solanum carolinense |
2 |
| houndstongue |
Cynoglossum officinale |
1 |
| hyssop loosestrife |
Lythrum hyssopifolium |
1 |
| Indian tobacco |
Nicotiana quadrivalvis |
1 |
| Italian plumeless thistle |
Carduus pycnocephalus |
1 |
| Japanese knotweed |
Fallopia japonica |
1 |
| Japanese morningglory |
Ipomoea nil |
1 |
| Jersey cudweed |
Pseudognaphalium luteoalbum |
1 |
| Jerusalem-oak goosefoot |
Chenopodium botrys |
1 |
| jimsonweed |
Datura stramonium |
1 |
| juniper mistletoe |
Phoradendron juniperinum |
1 |
| Kerner's dock |
Rumex kerneri |
2 |
| knotted hedgeparsley |
Torilis nodosa |
2 |
| Lamarck's bedstraw |
Galium divaricatum |
1 |
| lawn burweed |
Soliva sessilis |
1 |
| lesser hawkbit |
Leontodon taraxacoides |
1 |
| little mallow |
Malva parviflora |
1 |
| little western bittercress |
Cardamine oligosperma |
1 |
| London rocket |
Sisymbrium irio |
2 |
| longroot smartweed |
Polygonum amphibium var. emersum |
1 |
| manyflower tobacco |
Nicotiana acuminata var. multiflora |
1 |
| marijuana |
Cannabis sativa |
1 |
| marsh yellowcress |
Rorippa palustris |
1 |
| mat chaff-flower |
Alternanthera caracasana |
1 |
| Mediterranean sage |
Salvia aethiopis |
2 |
| Mediterranean saltwort |
Salsola vermiculata |
1 |
| Mexican fireweed |
Kochia scoparia |
1 |
| Mexican whorled milkweed |
Asclepias fascicularis |
1 |
| mexicantea |
Dysphania ambrosioides |
1 |
| miner's lettuce |
Claytonia perfoliata |
2 |
| Moroccan toadflax |
Linaria maroccana |
1 |
| moss vervain |
Glandularia pulchella |
1 |
| moth mullein |
Verbascum blattaria |
1 |
| mouse-ear cress |
Arabidopsis thaliana |
1 |
| musk thistle |
Carduus nutans |
1 |
| narrow-leaved iceplant |
Conicosia pugioniformis |
1 |
| New Zealand geranium |
Geranium retrorsum |
2 |
| ngaio tree |
Myoporum laetum |
1 |
| Nuttall povertyweed |
Monolepis nuttalliana |
1 |
| oppositeleaf Russian thistle |
Salsola soda |
1 |
| orangeberry nightshade |
Solanum lanceolatum |
1 |
| orbicular whitetop |
Lepidium chalepense |
1 |
| oriental mustard |
Sisymbrium orientale |
1 |
| oval-leaf knotweed |
Polygonum arenastrum |
1 |
| oxeye daisy |
Leucanthemum vulgare |
1 |
| Pacific hound's tongue |
Cynoglossum grande |
1 |
| Pacific poison-oak |
Toxicodendron diversilobum |
2 |
| Palmer amaranth |
Amaranthus palmeri |
1 |
| panicle willowherb |
Epilobium brachycarpum |
1 |
| pansy |
Viola tricolor |
1 |
| pappose tarweed |
Centromadia parryi ssp. rudis |
1 |
| pennyroyal |
Mentha pulegium |
2 |
| peregrine thistle |
Cirsium cymosum |
1 |
| perennial pepperweed |
Lepidium latifolium |
1 |
| Persian speedwell |
Veronica persica |
1 |
| pineapple-weed |
Matricaria discoidea |
1 |
| pinnate tansymustard |
Descurainia pinnata |
1 |
| poison-hemlock |
Conium maculatum |
1 |
| poverty sumpweed |
Iva axillaris |
3 |
| pride of Madeira |
Echium candicans |
2 |
| prostrate pigweed |
Amaranthus blitoides |
1 |
| puncturevine |
Tribulus terrestris |
2 |
| purple cudweed |
Gamochaeta purpurea |
1 |
| purple deadnettle |
Lamium purpureum |
1 |
| purple loosestrife |
Lythrum salicaria |
2 |
| purple starthistle |
Centaurea calcitrapa |
1 |
| purplestamen mullein |
Verbascum virgatum |
2 |
| Queen Anne's lace, wild carrot |
Daucus carota |
1 |
| radish |
Raphanus sativus |
1 |
| red orach |
Atriplex rosea |
1 |
| red sandspurry |
Spergularia rubra |
1 |
| red sorrel |
Rumex acetosella |
1 |
| redmaids |
Calandrinia ciliata |
2 |
| redpurple ragwort |
Senecio elegans |
1 |
| redroot pigweed |
Amaranthus retroflexus |
1 |
| redstem filaree |
Erodium cicutarium |
1 |
| rush skeletonweed |
Chondrilla juncea |
1 |
| Russian knapweed |
Rhaponticum repens |
3 |
| Russian-olive |
Elaeagnus angustifolia |
1 |
| Russian-thistle |
Salsola tragus |
2 |
| sacred thorn-apple |
Datura wrightii |
1 |
| saltcedar |
Tamarix ramosissima |
1 |
| saltmarsh sandspurry |
Spergularia salina |
1 |
| salvation jane |
Echium plantagineum |
1 |
| scarlet gaura |
Gaura coccinea |
1 |
| scarlet pimpernel |
Lysimachia arvensis |
1 |
| Scotch thistle |
Onopordum acanthium |
1 |
| sea fig |
Carpobrotus chilensis |
2 |
| seashore vervain |
Verbena montevidensis |
1 |
| seaside heliotrope |
Heliotropium curassavicum |
1 |
| seepwillow |
Baccharis salicifolia |
1 |
| sharpleaf groundcherry |
Physalis acutifolia |
1 |
| sharppoint fluvellin |
Kickxia elatine |
2 |
| shortfruit stork's bill |
Erodium brachycarpum |
2 |
| shortpod mustard |
Hirschfeldia incana |
1 |
| showy milkweed |
Asclepias speciosa |
1 |
| sibara |
Sibara virginica |
1 |
| silverleaf nightshade |
Solanum elaeagnifolium |
1 |
| silversheath knotweed |
Polygonum argyrocoleon |
1 |
| slender aster |
Symphyotrichum divaricatum |
2 |
| slenderleaf iceplant |
Mesembryanthemum nodiflorum |
1 |
| smallflower tamarisk |
Tamarix parviflora |
1 |
| smooth cat's ear |
Hypochaeris glabra |
2 |
| smooth hawksbeard |
Crepis capillaris |
1 |
| smooth pigweed |
Amaranthus hybridus |
1 |
| snowy thistle |
Cirsium occidentale var. candidissimum |
1 |
| southern brassbuttons |
Cotula australis |
1 |
| southwestern carrot |
Daucus pusillus |
1 |
| spiny amaranth |
Amaranthus spinosus |
2 |
| spiny cocklebur |
Xanthium spinosum |
1 |
| spiny plumeless thistle |
Carduus acanthoides |
1 |
| spiny sowthistle |
Sonchus asper |
2 |
| spinyfruit buttercup |
Ranunculus muricatus |
2 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
1 |
| spotted water hemlock |
Cicuta maculata var. angustifolia |
1 |
| spreading pellitory |
Parietaria judaica |
1 |
| squarrose knapweed |
Centaurea virgata |
1 |
| sticky chickweed |
Cerastium glomeratum |
1 |
| stinging nettle |
Urtica dioica ssp. holosericea |
1 |
| stinking chamomile |
Anthemis cotula |
1 |
| stinkwort |
Dittrichia graveolens |
2 |
| stork's bill |
Erodium spp. |
1 |
| strawflower |
Helichrysum petiolare |
1 |
| sulfur cinquefoil |
Potentilla recta |
1 |
| sulphur knapweed |
Centaurea sulphurea |
1 |
| tall fleabane |
Conyza floribunda |
1 |
| tall hedge mustard |
Sisymbrium loeselii |
1 |
| tall morningglory |
Ipomoea purpurea |
1 |
| tall vervain |
Verbena bonariensis |
1 |
| tansy ragwort |
Senecio jacobaea |
1 |
| telegraphplant |
Heterotheca grandiflora |
1 |
| Texas filaree |
Erodium texanum |
1 |
| threebract loosestrife |
Lythrum tribracteatum |
1 |
| thymeleaf sandwort |
Arenaria serpyllifolia |
1 |
| tomatillo groundcherry |
Physalis philadelphica |
1 |
| tree tobacco |
Nicotiana glauca |
1 |
| tree-of-heaven |
Ailanthus altissima |
5 |
| triangle orach |
Atriplex prostrata |
1 |
| true forget-me-not |
Myosotis scorpioides |
1 |
| tumble mustard |
Sisymbrium altissimum |
1 |
| tumble pigweed |
Amaranthus albus |
1 |
| veiny pepperweed |
Lepidium oblongum var. oblongum |
2 |
| velvetleaf |
Abutilon theophrasti |
1 |
| venus-comb |
Scandix pecten-veneris |
1 |
| vinegarweed |
Trichostema lanceolatum |
2 |
| virgate tarweed |
Holocarpha virgata |
2 |
| Virginia pepperweed |
Lepidium virginicum |
2 |
| wall bedstraw |
Galium parisiense |
1 |
| water speedwell |
Veronica anagallis-aquatica |
1 |
| wavyleaf gaura |
Gaura sinuata |
1 |
| wavyleaf thistle |
Cirsium undulatum |
1 |
| western marsh cudweed |
Gnaphalium palustre |
1 |
| western ragweed |
Ambrosia psilostachya |
1 |
| western salsify |
Tragopogon dubius |
1 |
| western thimbleberry |
Rubus parviflorus |
1 |
| western waterhemlock |
Cicuta douglasii |
1 |
| white bladderflower |
Araujia sericifera |
1 |
| white horehound |
Marrubium vulgare |
1 |
| white mulberry |
Morus alba |
1 |
| white mustard |
Sinapis alba |
1 |
| whitebark raspberry |
Rubus leucodermis |
1 |
| whiteplume wirelettuce |
Stephanomeria exigua ssp. coronaria |
1 |
| whitestem filaree |
Erodium moschatum |
1 |
| wild buckwheat |
Fallopia convolvulus |
1 |
| wild celery |
Cyclospermum leptophyllum |
1 |
| wild mustard |
Sinapis arvensis |
1 |
| wild parsnip |
Pastinaca sativa |
2 |
| wild radish |
Raphanus raphanistrum |
1 |
| willowleaf lettuce |
Lactuca saligna |
1 |
| windowbox woodsorrel |
Oxalis rubra |
1 |
| woodland groundsel |
Senecio sylvaticus |
1 |
| woolly distaff thistle |
Carthamus lanatus |
3 |
| yellow bedstraw |
Galium verum |
1 |
| yellow chamomile |
Anthemis tinctoria |
1 |
| yellow glandweed |
Parentucellia viscosa |
1 |
| yellow rocket |
Barbarea vulgaris |
1 |
| yellow starthistle |
Centaurea solstitialis |
1 |
| yellow toadflax |
Linaria vulgaris |
2 |
| yellow wall bedstraw |
Galium murale |
1 |
| yellowspine thistle |
Cirsium ochrocentrum |
1 |
