| African mustard |
Brassica tournefortii |
2 |
| air-potato |
Dioscorea bulbifera |
1 |
| alkali mallow |
Malvella leprosa |
3 |
| alkaliweed |
Cressa truxillensis |
1 |
| Allegheny spurge |
Pachysandra procumbens |
3 |
| alligatorweed |
Alternanthera philoxeroides |
2 |
| alpine knapweed |
Centaurea nigrescens |
2 |
| American bugleweed |
Lycopus americanus |
2 |
| American burnweed |
Erechtites hieraciifolius |
1 |
| American ginseng |
Panax quinquefolius |
4 |
| American sweetflag |
Acorus calamus |
1 |
| American yellow rocket |
Barbarea orthoceras |
1 |
| annual bursage |
Ambrosia acanthicarpa |
1 |
| annual fleabane |
Erigeron annuus |
1 |
| annual sowthistle |
Sonchus oleraceus |
1 |
| annual wormwood |
Artemisia annua |
1 |
| annual yellow sweetclover |
Melilotus indicus |
2 |
| apple mint |
Mentha suaveolens |
1 |
| apple-of-Peru |
Nicandra physalodes |
1 |
| arrowleaf sida |
Sida rhombifolia |
1 |
| Asiatic dayflower |
Commelina communis |
1 |
| Asiatic dock |
Rumex confertus |
5 |
| aster |
Aster spp. |
1 |
| Australian burnweed |
Erechtites minimus |
1 |
| Austrian fieldcress |
Rorippa austriaca |
1 |
| Barbados aloe |
Aloe vera |
1 |
| barbwire Russian-thistle |
Salsola paulsenii |
1 |
| bashful wakerobin |
Trillium catesbaei |
2 |
| bellardia |
Bellardia trixago |
4 |
| Benghal dayflower |
Commelina benghalensis |
7 |
| biddy-biddy |
Acaena novae-zelandiae |
1 |
| biennial wormwood |
Artemisia biennis |
2 |
| big chickweed |
Cerastium fontanum ssp. vulgare |
3 |
| bigleaf lupine |
Lupinus polyphyllus |
1 |
| birdfoot violet |
Viola pedata |
1 |
| birdsfoot trefoil |
Lotus corniculatus |
1 |
| birdsrape mustard |
Brassica rapa |
2 |
| bishops goutweed |
Aegopodium podagraria |
7 |
| bitter lettuce |
Lactuca virosa |
2 |
| bittersweet nightshade |
Solanum dulcamara |
9 |
| Black dog-strangling vine, black swallowwort |
Cynanchum louiseae |
10 |
| black henbane |
Hyoscyamus niger |
4 |
| black medic |
Medicago lupulina |
2 |
| black mustard |
Brassica nigra |
2 |
| black nightshade |
Solanum nigrum |
2 |
| black-eyed susan |
Rudbeckia hirta |
1 |
| blue anise sage |
Salvia guaranitica |
1 |
| blue lettuce |
Lactuca tatarica var. pulchella |
1 |
| blue mistflower |
Conoclinium coelestinum |
1 |
| blue mustard |
Chorispora tenella |
1 |
| blue vervain |
Verbena hastata |
2 |
| bluebead-lily |
Clintonia borealis |
2 |
| blueflag iris |
Iris versicolor |
3 |
| bluets |
Houstonia caerulea |
2 |
| bouncingbet |
Saponaria officinalis |
1 |
| branched broomrape |
Orobanche ramosa |
1 |
| brightblue speedwell |
Veronica serpyllifolia ssp. humifusa |
2 |
| bristly hawksbeard |
Crepis setosa |
2 |
| bristly mallow |
Modiola caroliniana |
3 |
| bristly oxtongue |
Helminthotheca echioides |
1 |
| British yellowhead |
Inula britannica |
1 |
| brittleleaf naiad |
Najas minor |
6 |
| broadleaf dock |
Rumex obtusifolius |
3 |
| broadleaf filaree |
Erodium botrys |
3 |
| broadleaf forget-me-not |
Myosotis latifolia |
1 |
| broadleaf plantain |
Plantago major |
6 |
| buckhorn plantain |
Plantago coronopus |
3 |
| buckhorn plantain |
Plantago lanceolata |
1 |
| buffalobur |
Solanum rostratum |
3 |
| bull mallow |
Malva nicaeensis |
3 |
| bull thistle |
Cirsium vulgare |
6 |
| bur beggarticks |
Bidens tripartita |
4 |
| bur chervil |
Anthriscus caucalis |
1 |
| burning nettle |
Urtica urens |
3 |
| buttercup oxalis |
Oxalis pes-caprae |
2 |
| Caesarweed |
Urena lobata |
1 |
| California false-hellebore |
Veratrum californicum |
3 |
| California loosestrife |
Lythrum californicum |
1 |
| California mugwort |
Artemisia douglasiana |
1 |
| camphorweed |
Heterotheca subaxillaris |
1 |
| Canada thistle |
Cirsium arvense |
11 |
| canna |
Canna spp. |
2 |
| cape ivy |
Delairea odorata |
1 |
| capeweed |
Arctotheca calendula |
1 |
| cardinalflower |
Lobelia cardinalis |
1 |
| cardoon |
Cynara cardunculus |
1 |
| Carolina geranium |
Geranium carolinianum |
1 |
| Carolina mosquitofern |
Azolla caroliniana |
1 |
| Carolina puccoon |
Lithospermum caroliniense |
1 |
| carpetweed |
Mollugo verticillata |
4 |
| catchweed bedstraw |
Galium aparine |
3 |
| celandine poppy |
Stylophorum diphyllum |
1 |
| chamber bitter |
Phyllanthus urinaria |
1 |
| cheddar pink |
Dianthus gratianapolitanus |
2 |
| chicory |
Cichorium intybus |
3 |
| Chinese thorn-apple |
Datura quercifolia |
4 |
| clasping heliotrope |
Heliotropium amplexicaule |
1 |
| clasping pepperweed |
Lepidium perfoliatum |
2 |
| Clayton's sweetroot |
Osmorhiza claytonii |
3 |
| cluster dock |
Rumex conglomeratus |
2 |
| coltsfoot |
Tussilago farfara |
10 |
| common chickweed |
Stellaria pallida |
1 |
| common cocklebur |
Xanthium strumarium |
2 |
| common comfrey |
Symphytum officinale |
3 |
| common crupina |
Crupina vulgaris |
1 |
| common duckmeat |
Spirodela polyrrhiza |
2 |
| common fiddleneck |
Amsinckia menziesii var. intermedia |
3 |
| common frogbit |
Hydrocharis morsus-ranae |
2 |
| common groundsel |
Senecio vulgaris |
1 |
| common lespedeza |
Kummerowia striata |
1 |
| common mallow |
Malva neglecta |
1 |
| common mullein |
Verbascum thapsus |
4 |
| common pokeweed |
Phytolacca americana |
4 |
| common purslane |
Portulaca oleracea |
7 |
| common ragweed |
Ambrosia artemisiifolia |
2 |
| common salsify |
Tragopogon porrifolius |
1 |
| common sunflower |
Helianthus annuus |
2 |
| common tansy |
Tanacetum vulgare |
3 |
| common teasel |
Dipsacus fullonum |
3 |
| common valerian |
Valeriana officinalis |
7 |
| common yarrow |
Achillea millefolium |
2 |
| compassplant |
Silphium laciniatum |
3 |
| coneflowers |
Echinacea spp. |
1 |
| Confederate wakerobin |
Trillium reliquum |
13 |
| Cooley's meadow-rue |
Thalictrum cooleyi |
9 |
| copper iris |
Iris fulva |
1 |
| corn chamomile |
Anthemis arvensis |
1 |
| corn speedwell |
Veronica arvensis |
2 |
| corn spurry |
Spergula arvensis |
2 |
| cornflower |
Centaurea cyanus |
2 |
| Cornish mallow |
Lavatera cretica |
2 |
| Coulter's horseweed |
Laennecia coulteri |
3 |
| cowpea |
Vigna unguiculata |
1 |
| cowslip |
Primula veris |
1 |
| coyote tobacco |
Nicotiana attenuata |
1 |
| creeping buttercup |
Ranunculus repens |
9 |
| creeping phlox |
Phlox stolonifera |
3 |
| creeping waterprimrose |
Ludwigia peploides |
3 |
| creeping woodsorrel |
Oxalis corniculata |
4 |
| crested latesummer mint |
Elsholtzia ciliata |
6 |
| crimson pitcherplant |
Sarracenia leucophylla |
5 |
| crimson woodsorrel |
Oxalis incarnata |
1 |
| crimsoneyed rosemallow |
Hibiscus moscheutos |
1 |
| croftonweed |
Ageratina adenophora |
2 |
| crystalline iceplant |
Mesembryanthemum crystallinum |
1 |
| cultivated knotweed |
Persicaria wallichii |
3 |
| cup rosinweed |
Silphium perfoliatum |
6 |
| curly dock |
Rumex crispus |
1 |
| curlycup gumweed |
Grindelia squarrosa |
1 |
| curlyleaf pondweed |
Potamogeton crispus |
3 |
| cutleaf burnweed |
Erechtites glomeratus |
2 |
| cutleaf coneflower |
Rudbeckia laciniata |
2 |
| cutleaf evening-primrose |
Oenothera laciniata |
3 |
| cutleaf geranium |
Geranium dissectum |
4 |
| cutleaf nightshade |
Solanum triflorum |
2 |
| cutleaf teasel |
Dipsacus laciniatus |
1 |
| cutleaf toothwort |
Cardamine concatenata |
1 |
| cypress spurge |
Euphorbia cyparissias |
5 |
| dahlia |
Dahlia spp. |
1 |
| Dalmatian toadflax |
Linaria dalmatica |
5 |
| dalmatian toadflax |
Linaria dalmatica ssp. dalmatica |
5 |
| damesrocket |
Hesperis matronalis |
5 |
| dandelion |
Taraxacum officinale |
3 |
| daylily |
Hemerocallis spp. |
2 |
| Deptford pink |
Dianthus armeria |
3 |
| devil's-claw |
Proboscidea louisianica |
4 |
| devils beggarticks |
Bidens frondosa |
1 |
| diffuse knapweed |
Centaurea diffusa |
2 |
| dog-strangling vine, European swallowwort |
Cynanchum rossicum |
10 |
| dotted smartweed |
Persicaria punctata |
1 |
| Douglas iris |
Iris douglasiana |
4 |
| Douglas' meadowfoam |
Limnanthes douglasii |
2 |
| dovefoot geranium |
Geranium molle |
4 |
| drug fumitory |
Fumaria officinalis |
3 |
| Drummond's beeblossom |
Gaura drummondii |
4 |
| duck-lettuce |
Ottelia alismoides |
8 |
| dutchman's breeches |
Dicentra cucullaria |
1 |
| dwarf larkspur |
Delphinium tricorne |
1 |
| dwarf palmetto |
Sabal minor |
8 |
| dwarf St. Johnswort |
Hypericum mutilum |
1 |
| Dyer's woad |
Isatis tinctoria |
1 |
| early wintercress |
Barbarea verna |
1 |
| eastern false rue anemone |
Enemion biternatum |
2 |
| eastern turkeybeard |
Xerophyllum asphodeloides |
1 |
| English catchfly |
Silene gallica |
1 |
| English violet |
Viola odorata |
1 |
| Eurasian watermilfoil |
Myriophyllum spicatum |
5 |
| European bugleweed |
Lycopus europaeus |
1 |
| European heliotrope |
Heliotropium europaeum |
1 |
| European pasqueflower |
Pulsatilla vulgaris |
1 |
| European pepperwort |
Marsilea quadrifolia |
2 |
| evergreen candytuft |
Iberis sempervirens |
1 |
| fairywand |
Chamaelirium luteum |
2 |
| fanwort |
Cabomba caroliniana |
4 |
| featherleaf pepperweed |
Lepidium pinnatifidum |
1 |
| feathery false lily of the valley |
Maianthemum racemosum |
2 |
| fennel |
Foeniculum vulgare |
1 |
| feverfew |
Tanacetum parthenium |
1 |
| fiddleleaf dock |
Rumex pulcher |
2 |
| field bindweed |
Convolvulus arvensis |
2 |
| field madder |
Sherardia arvensis |
2 |
| field pennycress |
Thlaspi arvense |
4 |
| field pepperweed |
Lepidium campestre |
3 |
| fire pink |
Silene virginica |
3 |
| fireweed |
Chamerion angustifolium |
2 |
| Fitch's tarweed |
Hemizonia fitchii |
1 |
| fivehook bassia |
Bassia hyssopifolia |
2 |
| flixweed |
Descurainia sophia |
2 |
| flowering rush |
Butomus umbellatus |
8 |
| foxglove |
Digitalis purpurea |
4 |
| Fremont's deathcamas |
Zigadenus fremontii |
1 |
| fringed willowherb |
Epilobium ciliatum ssp. ciliatum |
2 |
| fringed willowherb |
Epilobium ciliatum ssp. watsonii |
1 |
| garden loosestrife |
Lysimachia vulgaris |
4 |
| garden orach |
Atriplex hortensis |
1 |
| garlic mustard |
Alliaria petiolata |
16 |
| Georgia aster |
Symphyotrichum georgianum |
2 |
| giant hogweed |
Heracleum mantegazzianum |
13 |
| giant ragweed |
Ambrosia trifida |
2 |
| giant reed |
Arundo donax |
8 |
| giant salvinia |
Salvinia molesta |
3 |
| golden tickseed |
Coreopsis tinctoria var. tinctoria |
1 |
| goldenseal |
Hydrastis canadensis |
2 |
| grassy arrowhead |
Sagittaria graminea |
1 |
| great blue lobelia |
Lobelia siphilitica |
3 |
| Great Valley gumweed |
Grindelia camporum var. camporum |
1 |
| greater ammi |
Ammi majus |
1 |
| greater celandine |
Chelidonium majus |
6 |
| greater fringed gentian |
Gentianopsis crinita |
9 |
| green fiveleaf orchid |
Isotria medeoloides |
4 |
| green pitcherplant |
Sarracenia oreophila |
11 |
| ground ivy |
Glechoma hederacea |
4 |
| Guyandotte beauty |
Synandra hispidula |
1 |
| hairy beggarticks |
Bidens pilosa |
1 |
| hairy buttercup |
Ranunculus sardous |
4 |
| hairy cat's ear |
Hypochaeris radicata |
1 |
| hairy fleabane |
Conyza bonariensis |
3 |
| hairy galinsoga |
Galinsoga ciliata |
1 |
| hairy nightshade |
Solanum physalifolium |
2 |
| hairy purslane speedwell |
Veronica peregrina ssp. xalapensis |
1 |
| hairy shadow witch |
Ponthieva racemosa |
1 |
| hairy whitetop |
Cardaria pubescens |
1 |
| hairy willowherb |
Epilobium hirsutum |
7 |
| halogeton |
Halogeton glomeratus |
2 |
| harbinger of spring |
Erigenia bulbosa |
1 |
| hedge mustard |
Sisymbrium officinale |
4 |
| hedgeparsley |
Torilis arvensis |
3 |
| hemp dogbane |
Apocynum cannabinum |
2 |
| hemp sesbania |
Sesbania exaltata |
2 |
| henbit |
Lamium amplexicaule |
4 |
| hepatica |
Hepatica nobilis |
2 |
| herb-robert |
Geranium robertianum |
4 |
| high mallow |
Malva sylvestris |
4 |
| hoary cress |
Lepidium draba |
1 |
| hollyleaf naiad |
Najas marina |
1 |
| honeyvine swallowwort |
Cynanchum laeve |
2 |
| hooded pitcherplant |
Sarracenia minor |
3 |
| Hooker's evening primrose |
Oenothera elata ssp. hookeri |
4 |
| hophornbeam copperleaf |
Acalypha ostryifolia |
1 |
| horehound |
Marrubium peregrinum |
1 |
| horse purslane |
Trianthema portulacastrum |
3 |
| horsenettle |
Solanum carolinense |
11 |
| horseweed |
Conyza canadensis |
10 |
| houndstongue |
Cynoglossum officinale |
2 |
| hydrilla |
Hydrilla verticillata |
6 |
| hyssop loosestrife |
Lythrum hyssopifolium |
1 |
| Indian mustard |
Brassica juncea |
2 |
| Indian tobacco |
Nicotiana quadrivalvis |
3 |
| Italian arum |
Arum italicum |
3 |
| Italian plumeless thistle |
Carduus pycnocephalus |
2 |
| ivyleaf morningglory |
Ipomoea hederacea |
2 |
| Japanese dodder |
Cuscuta japonica |
3 |
| Japanese hedgeparsley |
Torilis japonica |
6 |
| Japanese knotweed |
Fallopia japonica |
22 |
| Jersey cudweed |
Pseudognaphalium luteoalbum |
1 |
| Jerusalem artichoke |
Helianthus tuberosus |
2 |
| Jerusalem-oak goosefoot |
Chenopodium botrys |
2 |
| jewelweed |
Impatiens capensis |
3 |
| jimsonweed |
Datura stramonium |
11 |
| Kellogg's tarweed |
Deinandra kelloggii |
1 |
| Kerner's dock |
Rumex kerneri |
4 |
| kidneyleaf grass of Parnassus |
Parnassia asarifolia |
6 |
| knotted hedgeparsley |
Torilis nodosa |
2 |
| Korean lespedeza |
Kummerowia stipulacea |
2 |
| ladysthumb |
Persicaria maculosa |
6 |
| Lamarck's bedstraw |
Galium divaricatum |
2 |
| lambsquarters |
Chenopodium album |
2 |
| lanceleaf violet |
Viola lanceolata |
1 |
| largeflower heartleaf |
Hexastylis shuttleworthii var. harperi |
1 |
| largeflower valerian |
Valeriana pauciflora |
4 |
| largeleaf waterleaf |
Hydrophyllum macrophyllum |
1 |
| leafy spurge |
Euphorbia esula |
9 |
| Leavenworth's eryngo |
Eryngium leavenworthii |
4 |
| lesser celandine, fig buttercup |
Ficaria verna |
6 |
| limnophila |
Limnophila sessiliflora |
2 |
| little mallow |
Malva parviflora |
3 |
| little western bittercress |
Cardamine oligosperma |
1 |
| London rocket |
Sisymbrium irio |
2 |
| longroot smartweed |
Polygonum amphibium var. emersum |
2 |
| looseflower water-willow |
Justicia ovata var. lanceolata |
1 |
| low amaranth |
Amaranthus deflexus |
1 |
| manyflower tobacco |
Nicotiana acuminata var. multiflora |
4 |
| marijuana |
Cannabis sativa |
1 |
| marsh dayflower |
Murdannia keisak |
1 |
| marsh yellowcress |
Rorippa palustris |
2 |
| marshpepper smartweed |
Polygonum hydropiper |
1 |
| mayapple |
Podophyllum peltatum |
1 |
| meadow campion |
Silene flos-cuculi |
4 |
| meadow deathcamas |
Zigadenus venenosus var. venenosus |
2 |
| Mediterranean rocket |
Sisymbrium erysimoides |
1 |
| Mediterranean sage |
Salvia aethiopis |
5 |
| Mediterranean saltwort |
Salsola vermiculata |
2 |
| Mexican fireweed |
Kochia scoparia |
6 |
| Mexican waterlily |
Nymphaea mexicana |
1 |
| Mexican whorled milkweed |
Asclepias fascicularis |
1 |
| mexicantea |
Dysphania ambrosioides |
1 |
| miner's lettuce |
Claytonia perfoliata |
4 |
| Missouri lambsquarters |
Chenopodium album var. missouriense |
1 |
| Mohr's Barbara's buttons |
Marshallia mohrii |
3 |
| moneywort |
Lysimachia nummularia |
1 |
| monkeygrass |
Liriope muscari |
1 |
| Moroccan toadflax |
Linaria maroccana |
4 |
| moss vervain |
Glandularia pulchella |
2 |
| moth mullein |
Verbascum blattaria |
5 |
| mountain woodsorrel |
Oxalis montana |
1 |
| mouse-ear cress |
Arabidopsis thaliana |
2 |
| mudmat |
Glossostigma cleistanthum |
1 |
| musk thistle |
Carduus nutans |
6 |
| narrowleaf bittercress |
Cardamine impatiens |
7 |
| narrowleaf blueeyed-grass |
Sisyrinchium angustifolium |
2 |
| narrowleaf spring-beauty |
Claytonia virginica |
1 |
| nettleleaf goosefoot |
Chenopodium murale |
1 |
| New England aster |
Symphyotrichum novae-angliae |
1 |
| New York ironweed |
Vernonia noveboracensis |
1 |
| New Zealand geranium |
Geranium retrorsum |
4 |
| nipplefruit |
Solanum mammosum |
2 |
| northern fogfruit |
Phyla lanceolata |
1 |
| Nuttall povertyweed |
Monolepis nuttalliana |
2 |
| Oconee bells |
Shortia galacifolia |
18 |
| Olympic mullein |
Verbascum olympicum |
1 |
| onerow yellowcress |
Nasturtium microphyllum |
3 |
| onions |
Allium spp. |
1 |
| onionweed |
Asphodelus fistulosus |
3 |
| oppositeleaf Russian thistle |
Salsola soda |
1 |
| orange hawkweed |
Hieracium aurantiacum |
1 |
| orbicular whitetop |
Lepidium chalepense |
2 |
| Oriental lady's thumb |
Persicaria longiseta |
4 |
| oriental mustard |
Sisymbrium orientale |
3 |
| ornamental jewelweed |
Impatiens glandulifera |
16 |
| oval-leaf knotweed |
Polygonum arenastrum |
1 |
| oxeye daisy |
Leucanthemum vulgare |
2 |
| Pacific hound's tongue |
Cynoglossum grande |
1 |
| Pacific poison-oak |
Toxicodendron diversilobum |
1 |
| pale smartweed |
Persicaria lapathifolia |
2 |
| paleseed plantain |
Plantago virginica |
1 |
| Palmer amaranth |
Amaranthus palmeri |
5 |
| panicle willowherb |
Epilobium brachycarpum |
2 |
| pansy |
Viola tricolor |
2 |
| parrot feather milfoil |
Myriophyllum aquaticum |
6 |
| parrot pitcherplant |
Sarracenia psittacina |
3 |
| partridgepea |
Chamaecrista fasciculata |
1 |
| peanut |
Arachis hypogaea |
2 |
| pennyroyal |
Mentha pulegium |
3 |
| peregrine thistle |
Cirsium cymosum |
1 |
| perennial cornflower |
Centaurea montana |
1 |
| perennial pepperweed |
Lepidium latifolium |
5 |
| perennial sowthistle |
Sonchus arvensis |
1 |
| perilla mint |
Perilla frutescens |
32 |
| Persian speedwell |
Veronica persica |
2 |
| persistent wakerobin |
Trillium persistens |
8 |
| pine echium |
Echium pininana |
2 |
| pineapple-weed |
Matricaria discoidea |
1 |
| pink lady's-slipper |
Cypripedium acaule |
6 |
| pink purslane |
Portulaca pilosa |
1 |
| pinnate tansymustard |
Descurainia pinnata |
2 |
| pitcherplants |
Sarracenia spp. |
3 |
| plantainleaf pussytoes |
Antennaria plantaginifolia |
2 |
| poison-hemlock |
Conium maculatum |
4 |
| poverty sumpweed |
Iva axillaris |
1 |
| Powell amaranth |
Amaranthus powellii |
1 |
| prairie rosinweed |
Silphium terebinthinaceum |
2 |
| prickly lettuce |
Lactuca serriola |
4 |
| prickly sida |
Sida spinosa |
2 |
| prostrate globe-amaranth |
Gomphrena serrata |
2 |
| purple coneflower |
Echinacea purpurea |
1 |
| purple cudweed |
Gamochaeta purpurea |
2 |
| purple deadnettle |
Lamium purpureum |
4 |
| purple loosestrife |
Lythrum salicaria |
9 |
| purple milkweed |
Asclepias purpurascens |
3 |
| purple toadflax |
Linaria purpurea |
2 |
| purplerocket |
Iodanthus pinnatifidus |
2 |
| purplestamen mullein |
Verbascum virgatum |
5 |
| purpletassels |
Dalea gattingeri |
2 |
| pygmy pipes |
Monotropsis odorata |
11 |
| Queen Anne's lace, wild carrot |
Daucus carota |
2 |
| rabbitfoot clover |
Trifolium arvense |
1 |
| radish |
Raphanus sativus |
2 |
| rapeseed |
Brassica napus |
3 |
| rayless sunflower |
Helianthus radula |
1 |
| red clover |
Trifolium pratense |
2 |
| red larkspur |
Delphinium nudicaule |
1 |
| red morningglory |
Ipomoea coccinea |
1 |
| red orach |
Atriplex rosea |
1 |
| red sandspurry |
Spergularia rubra |
1 |
| red sorrel |
Rumex acetosella |
12 |
| red trillium |
Trillium erectum |
2 |
| red turtlehead |
Chelone obliqua |
1 |
| redmaids |
Calandrinia ciliata |
4 |
| redpurple ragwort |
Senecio elegans |
1 |
| redroot pigweed |
Amaranthus retroflexus |
8 |
| redstem filaree |
Erodium cicutarium |
2 |
| robust horsenettle |
Solanum dimidiatum |
3 |
| Rocky Mountain fringed gentian |
Gentianopsis thermalis |
1 |
| Rocky Mountain iris |
Iris missouriensis |
2 |
| rose vervain |
Glandularia canadensis |
1 |
| rosepink |
Sabatia angularis |
1 |
| rosering gaillardia |
Gaillardia pulchella |
1 |
| rough cinquefoil |
Potentilla norvegica |
3 |
| roughleaf yellow loosestrife |
Lysimachia asperulifolia |
3 |
| roundleaf geranium |
Geranium rotundifolium |
1 |
| roundleaf sundew |
Drosera rotundifolia |
1 |
| rush skeletonweed |
Chondrilla juncea |
3 |
| Russian knapweed |
Rhaponticum repens |
1 |
| Russian mallow |
Althaea armeniaca |
7 |
| Russian sage |
Perovskia atriplicifolia |
1 |
| Russian-thistle |
Salsola tragus |
2 |
| sacred thorn-apple |
Datura wrightii |
3 |
| Sakhalin knotweed |
Fallopia sachalinensis |
11 |
| San Bernardino larkspur |
Delphinium parryi |
1 |
| satiny wormwood |
Artemisia schmidtiana |
1 |
| scaly blazing star |
Liatris squarrosa |
1 |
| scarlet gaura |
Gaura coccinea |
3 |
| scarlet pimpernel |
Lysimachia arvensis |
7 |
| Scotch thistle |
Onopordum acanthium |
6 |
| seashore vervain |
Verbena montevidensis |
4 |
| sericea lespedeza |
Lespedeza cuneata |
4 |
| sharpleaf groundcherry |
Physalis acutifolia |
2 |
| sharppoint fluvellin |
Kickxia elatine |
4 |
| sharpwing monkeyflower |
Mimulus alatus |
3 |
| shepherd's-purse |
Capsella bursa-pastoris |
4 |
| shining pepperweed |
Lepidium nitidum var. nitidum |
2 |
| shortfruit stork's bill |
Erodium brachycarpum |
4 |
| shortpod mustard |
Hirschfeldia incana |
2 |
| showy evening-primrose |
Oenothera speciosa |
2 |
| showy milkweed |
Asclepias speciosa |
1 |
| sibara |
Sibara virginica |
2 |
| sicklepod |
Senna obtusifolia |
1 |
| silverleaf nightshade |
Solanum elaeagnifolium |
4 |
| silversheath knotweed |
Polygonum argyrocoleon |
3 |
| skunkcabbage |
Symplocarpus foetidus |
5 |
| slender aster |
Symphyotrichum divaricatum |
5 |
| slender cinquefoil |
Potentilla gracilis |
3 |
| slender false garlic |
Nothoscordum gracile |
1 |
| slender snakecotton |
Froelichia gracilis |
6 |
| slenderflower thistle |
Carduus tenuiflorus |
1 |
| small broomrape |
Orobanche minor |
1 |
| small flower touch-me-not |
Impatiens parviflora |
5 |
| small Venus' looking-glass |
Triodanis biflora |
1 |
| smallflower buttercup |
Ranunculus abortivus |
1 |
| smallflower galinsoga |
Galinsoga parviflora |
1 |
| smooth bedstraw |
Galium mollugo |
1 |
| smooth cat's ear |
Hypochaeris glabra |
1 |
| smooth pigweed |
Amaranthus hybridus |
2 |
| smooth Solomon's seal |
Polygonatum biflorum |
1 |
| snowy thistle |
Cirsium occidentale var. candidissimum |
1 |
| spearmint |
Mentha spicata |
1 |
| spiderwort |
Tradescantia spp. |
1 |
| spiny amaranth |
Amaranthus spinosus |
2 |
| spiny cocklebur |
Xanthium spinosum |
1 |
| spiny plumeless thistle |
Carduus acanthoides |
2 |
| spiny sowthistle |
Sonchus asper |
1 |
| spinyfruit buttercup |
Ranunculus muricatus |
3 |
| spotted knapweed |
Centaurea stoebe |
3 |
| spotted knapweed |
Centaurea stoebe ssp. micranthos |
17 |
| spotted spurge |
Euphorbia maculata |
1 |
| spotted water hemlock |
Cicuta maculata var. angustifolia |
2 |
| spreading pellitory |
Parietaria judaica |
2 |
| spring coralroot |
Corallorhiza wisteriana |
1 |
| squarrose knapweed |
Centaurea virgata |
1 |
| squirrel corn |
Dicentra canadensis |
2 |
| standing-cypress |
Ipomopsis rubra |
1 |
| star chickweed |
Stellaria pubera |
2 |
| star-flower |
Trientalis borealis |
4 |
| star-of-Bethlehem |
Ornithogalum umbellatum |
3 |
| starflower pincushions |
Scabiosa stellata |
1 |
| sticky chickweed |
Cerastium glomeratum |
2 |
| stinging nettle |
Urtica dioica ssp. holosericea |
3 |
| stonecrop |
Hylotelephium spp. |
1 |
| stork's bill |
Erodium spp. |
1 |
| striped bladderwort |
Utricularia striata |
1 |
| sulfur cinquefoil |
Potentilla recta |
4 |
| sulphur knapweed |
Centaurea sulphurea |
2 |
| sunflower |
Helianthus spp. |
1 |
| swamp lousewort |
Pedicularis lanceolata |
5 |
| swamp milkweed |
Asclepias incarnata |
1 |
| swamp smartweed |
Persicaria hydropiperoides |
1 |
| sweet pitcherplant |
Sarracenia rubra |
5 |
| sweet wakerobin |
Trillium vaseyi |
1 |
| tall fleabane |
Conyza floribunda |
2 |
| tall hedge mustard |
Sisymbrium loeselii |
3 |
| tall ironweed |
Vernonia gigantea |
2 |
| tall lettuce |
Lactuca canadensis |
1 |
| tall morningglory |
Ipomoea purpurea |
1 |
| tall vervain |
Verbena bonariensis |
4 |
| tansy ragwort |
Senecio jacobaea |
7 |
| tawny daylily |
Hemerocallis fulva |
4 |
| telegraphplant |
Heterotheca grandiflora |
3 |
| Texas bluebonnet |
Lupinus subcarnosus |
1 |
| Texas filaree |
Erodium texanum |
1 |
| thistle |
Cirsium spp. |
3 |
| three-cornered leek |
Allium triquetrum |
2 |
| threebract loosestrife |
Lythrum tribracteatum |
1 |
| Thunberg's geranium |
Geranium thunbergii |
4 |
| thymeleaf sandwort |
Arenaria serpyllifolia |
1 |
| tomatillo groundcherry |
Physalis philadelphica |
3 |
| toothed dock |
Rumex dentatus |
1 |
| toothpick ammi |
Ammi visnaga |
1 |
| trailing fuzzybean |
Strophostyles umbellata |
2 |
| triangle orach |
Atriplex prostrata |
1 |
| trillium |
Trillium spp. |
1 |
| true forget-me-not |
Myosotis scorpioides |
6 |
| tumble mustard |
Sisymbrium altissimum |
2 |
| tumble pigweed |
Amaranthus albus |
4 |
| turkeyberry |
Solanum torvum |
1 |
| turnipweed |
Rapistrum rugosum |
6 |
| twinleaf |
Jeffersonia diphylla |
3 |
| twoflower dwarfdandelion |
Krigia biflora |
2 |
| twoleaf watermilfoil |
Myriophyllum heterophyllum |
2 |
| upright prairie coneflower |
Ratibida columnifera |
2 |
| veiny pepperweed |
Lepidium oblongum var. oblongum |
2 |
| velvetleaf |
Abutilon theophrasti |
7 |
| Venice mallow |
Hibiscus trionum |
5 |
| Venus flytrap |
Dionaea muscipula |
7 |
| venus-comb |
Scandix pecten-veneris |
1 |
| vinegarweed |
Trichostema lanceolatum |
4 |
| virgate tarweed |
Holocarpha virgata |
2 |
| Virginia pepperweed |
Lepidium virginicum |
3 |
| wall bedstraw |
Galium parisiense |
2 |
| wall rocket |
Diplotaxis tenuifolia |
1 |
| water fern |
Salvinia minima |
6 |
| water smartweed |
Polygonum amphibium var. stipulaceum |
1 |
| water speedwell |
Veronica anagallis-aquatica |
4 |
| watercress |
Nasturtium officinale |
3 |
| waterlettuce |
Pistia stratiotes |
4 |
| wavyleaf gaura |
Gaura sinuata |
4 |
| wavyleaf purple coneflower |
Echinacea simulata |
4 |
| wavyleaf thistle |
Cirsium undulatum |
1 |
| West Indian nightshade |
Solanum ptycanthum |
4 |
| western marsh cudweed |
Gnaphalium palustre |
1 |
| western ragweed |
Ambrosia psilostachya |
1 |
| western salsify |
Tragopogon dubius |
3 |
| western waterhemlock |
Cicuta douglasii |
1 |
| white bergamot |
Monarda clinopodia |
3 |
| white clover |
Trifolium repens |
3 |
| white garlic |
Allium neapolitanum |
2 |
| white horehound |
Marrubium vulgare |
2 |
| white mustard |
Sinapis alba |
2 |
| white ramping fumitory |
Fumaria capreolata |
1 |
| white turtlehead |
Chelone glabra |
1 |
| white violet |
Viola renifolia |
1 |
| whiteplume wirelettuce |
Stephanomeria exigua ssp. coronaria |
3 |
| whitestem filaree |
Erodium moschatum |
3 |
| wholeleaf rosinweed |
Silphium integrifolium |
2 |
| whorled coreopsis |
Coreopsis verticillata |
1 |
| wild bergamot |
Monarda fistulosa |
1 |
| wild buckwheat |
Fallopia convolvulus |
4 |
| wild chervil |
Anthriscus sylvestris |
6 |
| wild garlic |
Allium vineale |
3 |
| wild geranium |
Geranium maculatum |
2 |
| wild mustard |
Sinapis arvensis |
3 |
| wild parsnip |
Pastinaca sativa |
2 |
| wild radish |
Raphanus raphanistrum |
1 |
| willowleaf lettuce |
Lactuca saligna |
3 |
| winter aconite |
Eranthis hyemalis |
1 |
| witchweed |
Striga asiatica |
1 |
| wood whitlowgrass |
Draba nemorosa |
3 |
| woodland groundsel |
Senecio sylvaticus |
1 |
| woodland stonecrop |
Sedum ternatum |
2 |
| woolly distaff thistle |
Carthamus lanatus |
2 |
| yellow bedstraw |
Galium verum |
2 |
| yellow chamomile |
Anthemis tinctoria |
1 |
| yellow fieldcress |
Rorippa sylvestris |
1 |
| yellow glandweed |
Parentucellia viscosa |
3 |
| yellow hornpoppy |
Glaucium flavum |
4 |
| yellow pitcherplant |
Sarracenia flava |
4 |
| yellow rocket |
Barbarea vulgaris |
4 |
| yellow sweetclover |
Melilotus officinalis |
4 |
| yellow toadflax |
Linaria vulgaris |
7 |
| yellow trout lily |
Erythronium americanum |
1 |
| yellow wall bedstraw |
Galium murale |
2 |
| yellow woodsorrel |
Oxalis stricta |
3 |
| yellowflag iris |
Iris pseudacorus |
12 |
| yellowspine thistle |
Cirsium ochrocentrum |
1 |
| zigzag larkspur |
Delphinium patens |
1 |
| zigzag spiderwort |
Tradescantia subaspera |
3 |
| zizotes milkweed |
Asclepias oenotheroides |
2 |
