| alfalfa |
Medicago sativa |
2 |
| alkali mallow |
Malvella leprosa |
5 |
| American black nightshade |
Solanum americanum |
4 |
| American speedwell |
Veronica americana |
4 |
| annual bursage |
Ambrosia acanthicarpa |
3 |
| annual sowthistle |
Sonchus oleraceus |
5 |
| annual yellow sweetclover |
Melilotus indicus |
4 |
| barbwire Russian-thistle |
Salsola paulsenii |
1 |
| Bigelow's sneezeweed |
Helenium bigelovii |
6 |
| bigseed alfalfa dodder |
Cuscuta indecora var. indecora |
5 |
| birdsrape mustard |
Brassica rapa |
3 |
| black medic |
Medicago lupulina |
3 |
| black mustard |
Brassica nigra |
4 |
| black nightshade |
Solanum nigrum |
4 |
| blessed milkthistle |
Silybum marianum |
4 |
| blue mustard |
Chorispora tenella |
4 |
| bluewitch nightshade |
Solanum umbelliferum |
5 |
| broadleaf filaree |
Erodium botrys |
4 |
| broadleaf plantain |
Plantago major |
4 |
| buckhorn plantain |
Plantago lanceolata |
4 |
| buffalobur |
Solanum rostratum |
5 |
| bull thistle |
Cirsium vulgare |
4 |
| bur chervil |
Anthriscus caucalis |
6 |
| burning nettle |
Urtica urens |
7 |
| burrobush |
Ambrosia salsola |
5 |
| California amaranth |
Amaranthus californicus |
4 |
| California burclover |
Medicago polymorpha |
4 |
| California cottonrose |
Logfia filaginoides |
5 |
| canyon dodder |
Cuscuta subinclusa |
5 |
| catchweed bedstraw |
Galium aparine |
5 |
| chaparral dodder |
Cuscuta californica |
4 |
| Chinese caps |
Euphorbia crenulata |
4 |
| cluster dock |
Rumex conglomeratus |
4 |
| common chickweed |
Stellaria media |
5 |
| common cocklebur |
Xanthium strumarium |
4 |
| common dodder |
Cuscuta campestris |
5 |
| common fiddleneck |
Amsinckia menziesii var. intermedia |
1 |
| common groundsel |
Senecio vulgaris |
5 |
| common mallow |
Malva neglecta |
5 |
| common mullein |
Verbascum thapsus |
4 |
| common purslane |
Portulaca oleracea |
4 |
| common tarweed |
Centromadia pungens |
6 |
| common yarrow |
Achillea millefolium |
5 |
| Contura Creek sandmat |
Euphorbia ocellata |
5 |
| corn speedwell |
Veronica arvensis |
4 |
| corn spurry |
Spergula arvensis |
5 |
| cottonbatting plant |
Pseudognaphalium stramineum |
6 |
| creeping spurge |
Euphorbia serpens |
4 |
| creeping woodsorrel |
Oxalis corniculata |
5 |
| curly dock |
Rumex crispus |
3 |
| curvepod yellowcress |
Rorippa curvisiliqua |
5 |
| cutleaf evening-primrose |
Oenothera laciniata |
4 |
| cutleaf geranium |
Geranium dissectum |
6 |
| cutleaf groundcherry |
Physalis lancifolia |
4 |
| cutleaf nightshade |
Solanum triflorum |
4 |
| cypressvine morningglory |
Ipomoea quamoclit |
6 |
| dalmatian toadflax |
Linaria dalmatica ssp. dalmatica |
5 |
| dandelion |
Taraxacum officinale |
4 |
| desert milkweed |
Asclepias erosa |
3 |
| desertbroom |
Baccharis sarothroides |
4 |
| dotted smartweed |
Persicaria punctata |
5 |
| Douglas fiddleneck |
Amsinckia douglasiana |
4 |
| Eastwood's fiddleneck |
Amsinckia eastwoodiae |
6 |
| English catchfly |
Silene gallica |
5 |
| fennel |
Foeniculum vulgare |
5 |
| feverfew |
Tanacetum parthenium |
5 |
| field pennycress |
Thlaspi arvense |
4 |
| flixweed |
Descurainia sophia |
4 |
| forked green fiddleneck |
Amsinckia vernicosa var. furcata |
3 |
| garden vetch |
Vicia sativa ssp. nigra |
5 |
| green fiddleneck |
Amsinckia vernicosa |
1 |
| green fiddleneck |
Amsinckia vernicosa var. vernicosa |
1 |
| hairy cat's ear |
Hypochaeris radicata |
6 |
| hairy fleabane |
Conyza bonariensis |
4 |
| hairy nightshade |
Solanum physalifolium |
5 |
| hedge mustard |
Sisymbrium officinale |
5 |
| hedgeparsley |
Torilis arvensis |
4 |
| henbit |
Lamium amplexicaule |
5 |
| horseweed |
Conyza canadensis |
4 |
| Indian mustard |
Brassica juncea |
3 |
| ivyleaf morningglory |
Ipomoea hederacea |
5 |
| Jersey cudweed |
Pseudognaphalium luteoalbum |
5 |
| Kellogg's tarweed |
Deinandra kelloggii |
4 |
| Kern tarweed |
Deinandra pallida |
6 |
| knotted hedgeparsley |
Torilis nodosa |
6 |
| ladies' tobacco |
Pseudognaphalium californicum |
5 |
| ladysthumb |
Persicaria maculosa |
4 |
| lambsquarters |
Chenopodium album |
6 |
| little mallow |
Malva parviflora |
6 |
| London rocket |
Sisymbrium irio |
3 |
| Malta starthistle |
Centaurea melitensis |
5 |
| marsh yellowcress |
Rorippa palustris |
5 |
| matrimony vine |
Lycium barbarum |
3 |
| Menzies' fiddleneck |
Amsinckia menziesii |
5 |
| Mexican fireweed |
Kochia scoparia |
6 |
| Mexican whorled milkweed |
Asclepias fascicularis |
5 |
| miner's lettuce |
Claytonia perfoliata |
5 |
| Moroccan toadflax |
Linaria maroccana |
5 |
| narrowleaf cottonrose |
Logfia gallica |
6 |
| netseed spurge |
Euphorbia spathulata |
5 |
| nettleleaf goosefoot |
Chenopodium murale |
3 |
| oriental mustard |
Sisymbrium orientale |
3 |
| Pacific poison-oak |
Toxicodendron diversilobum |
4 |
| pale smartweed |
Persicaria lapathifolia |
4 |
| Palmer amaranth |
Amaranthus palmeri |
5 |
| panicle willowherb |
Epilobium brachycarpum |
5 |
| peach thorn |
Lycium cooperi |
5 |
| perennial pepperweed |
Lepidium latifolium |
5 |
| perennial sowthistle |
Sonchus arvensis |
2 |
| Persian speedwell |
Veronica persica |
4 |
| petty spurge |
Euphorbia peplus |
5 |
| pineapple-weed |
Matricaria discoidea |
5 |
| poison-hemlock |
Conium maculatum |
5 |
| poverty sumpweed |
Iva axillaris |
5 |
| Powell amaranth |
Amaranthus powellii |
5 |
| prickly lettuce |
Lactuca serriola |
4 |
| prostrate knotweed |
Polygonum aviculare |
3 |
| prostrate pigweed |
Amaranthus blitoides |
5 |
| puncturevine |
Tribulus terrestris |
4 |
| purple cudweed |
Gamochaeta purpurea |
5 |
| purple nightshade |
Solanum xanti |
5 |
| purple starthistle |
Centaurea calcitrapa |
4 |
| purplestamen mullein |
Verbascum virgatum |
4 |
| purslane speedwell |
Veronica peregrina |
4 |
| rapeseed |
Brassica napus |
3 |
| red amaranth |
Amaranthus cruentus |
4 |
| red sorrel |
Rumex acetosella |
4 |
| redmaids |
Calandrinia ciliata |
4 |
| redroot pigweed |
Amaranthus retroflexus |
4 |
| redstem filaree |
Erodium cicutarium |
3 |
| robust horsenettle |
Solanum dimidiatum |
6 |
| rosilla |
Helenium puberulum |
5 |
| rush skeletonweed |
Chondrilla juncea |
4 |
| Russian-thistle |
Salsola tragus |
5 |
| saltmarsh baccharis |
Baccharis douglasii |
5 |
| saltmarsh dodder |
Cuscuta salina |
5 |
| scarlet pimpernel |
Lysimachia arvensis |
6 |
| Scotch thistle |
Onopordum acanthium |
5 |
| seepwillow |
Baccharis salicifolia |
4 |
| sharpleaf groundcherry |
Physalis acutifolia |
4 |
| shepherd's-purse |
Capsella bursa-pastoris |
3 |
| shortfruit stork's bill |
Erodium brachycarpum |
4 |
| shortpod mustard |
Hirschfeldia incana |
6 |
| silverleaf nightshade |
Solanum elaeagnifolium |
5 |
| smallseed sandmat |
Euphorbia polycarpa |
4 |
| smooth cat's ear |
Hypochaeris glabra |
6 |
| smooth pigweed |
Amaranthus hybridus |
5 |
| spiny cocklebur |
Xanthium spinosum |
4 |
| spiny sowthistle |
Sonchus asper |
6 |
| spotted spurge |
Euphorbia maculata |
4 |
| sticky chickweed |
Cerastium glomeratum |
3 |
| stinging nettle |
Urtica dioica |
4 |
| stinking chamomile |
Anthemis cotula |
4 |
| swamp smartweed |
Persicaria hydropiperoides |
4 |
| tall fleabane |
Conyza floribunda |
4 |
| tall morningglory |
Ipomoea purpurea |
4 |
| tarweed fiddleneck |
Amsinckia lycopsoides |
4 |
| Texas filaree |
Erodium texanum |
4 |
| Texas toadflax |
Nuttallanthus texanus |
4 |
| tomatillo groundcherry |
Physalis philadelphica |
6 |
| tongue pepperweed |
Lepidium nitidum |
7 |
| tumble mustard |
Sisymbrium altissimum |
4 |
| tumble pigweed |
Amaranthus albus |
5 |
| Turkey mullein |
Croton setiger |
5 |
| two-color rabbit-tobacco |
Pseudognaphalium biolettii |
5 |
| upright pepperweed |
Lepidium strictum |
7 |
| velvetleaf |
Abutilon theophrasti |
4 |
| Virginia pepperweed |
Lepidium virginicum |
7 |
| Virginia winged rockcress |
Planodes virginicum |
5 |
| water jacket |
Lycium andersonii |
5 |
| water speedwell |
Veronica anagallis-aquatica |
4 |
| western fiddleneck |
Amsinckia tessellata |
5 |
| western marsh cudweed |
Gnaphalium palustre |
5 |
| western ragweed |
Ambrosia psilostachya |
4 |
| white clover |
Trifolium repens |
4 |
| white horehound |
Marrubium vulgare |
4 |
| white sweetclover |
Melilotus albus |
4 |
| whitestem filaree |
Erodium moschatum |
4 |
| wild marigold |
Tagetes minuta |
5 |
| wild mustard |
Sinapis arvensis |
6 |
| wild radish |
Raphanus raphanistrum |
4 |
| woollypod milkweed |
Asclepias eriocarpa |
3 |
| yellow starthistle |
Centaurea solstitialis |
4 |
| yellow sweetclover |
Melilotus officinalis |
4 |
