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Subject Scientific Name Images
African rue Peganum harmala 1
alpine knapweed Centaurea nigrescens 2
American speedwell Veronica americana 1
annual bursage Ambrosia acanthicarpa 1
annual false-brome Brachypodium distachyon 2
annual fleabane Erigeron annuus 1
annual wormwood Artemisia annua 1
apple mint Mentha suaveolens 1
Arabian schismus Schismus arabicus 1
arroyo willow Salix lasiolepis 1
Athel tamarisk Tamarix aphylla 1
Australian chess Bromus arenarius 2
Australian fingergrass Chloris truncata 2
barb goatgrass Aegilops triuncialis 3
barnyardgrass Echinochloa crus-galli 3
bellardia Bellardia trixago 3
biennial wormwood Artemisia biennis 2
big periwinkle Vinca major 1
big quakinggrass Briza maxima 1
black henbane Hyoscyamus niger 1
blue lettuce Lactuca tatarica var. pulchella 1
blue panicum Panicum antidotale 3
Brazilian peppertree Schinus terebinthifolius 1
brightblue speedwell Veronica serpyllifolia ssp. humifusa 1
bristly foxtail Setaria verticillata 2
bristly hawksbeard Crepis setosa 2
broadleaf dock Rumex obtusifolius 2
broadleaf filaree Erodium botrys 1
broadleaf glandweed Parentucellia latifolia 1
broadleaf plantain Plantago major 1
buckhorn plantain Plantago coronopus 1
buckhorn plantain Plantago lanceolata 1
buffalobur Solanum rostratum 1
buffelgrass Pennisetum ciliare 2
bulbous bluegrass Poa bulbosa 1
bulbous canarygrass Phalaris aquatica 3
bull thistle Cirsium vulgare 1
bur beggarticks Bidens tripartita 1
bur chervil Anthriscus caucalis 1
burning nettle Urtica urens 1
California blackberry Rubus ursinus 1
California cordgrass Spartina foliosa 2
California false-hellebore Veratrum californicum 1
Canada bluegrass Poa compressa 2
Canada thistle Cirsium arvense 1
Canary Island date palm Phoenix canariensis 1
canarygrass Phalaris canariensis 2
capeweed Arctotheca calendula 1
carpetgrass Axonopus fissifolius 1
catchweed bedstraw Galium aparine 1
cheatgrass Bromus tectorum 3
chicory Cichorium intybus 3
Chilean rabbitsfoot grass Polypogon australis 1
Chinese silvergrass Miscanthus sinensis 2
Chinese thorn-apple Datura quercifolia 2
cluster dock Rumex conglomeratus 2
colonial bentgrass Agrostis capillaris 1
common cordgrass Spartina anglica 1
common crupina Crupina vulgaris 1
common evening-primrose Oenothera biennis 1
common mediterraneangrass Schismus barbatus 2
common mullein Verbascum thapsus 1
common pokeweed Phytolacca americana 1
common purslane Portulaca oleracea 1
common ragweed Ambrosia artemisiifolia 2
common teasel Dipsacus fullonum 2
common velvetgrass Holcus lanatus 3
common yarrow Achillea millefolium 1
corn chamomile Anthemis arvensis 1
cornflower Centaurea cyanus 3
Coulter's horseweed Laennecia coulteri 2
creeping bentgrass Agrostis stolonifera 2
creeping buttercup Ranunculus repens 1
crested dogtailgrass Cynosurus cristatus 1
crimson fountaingrass Pennisetum setaceum 1
croftonweed Ageratina adenophora 2
crowfootgrass Dactyloctenium aegyptium 1
crystalline iceplant Mesembryanthemum crystallinum 1
cutleaf geranium Geranium dissectum 1
dallisgrass Paspalum dilatatum 2
dalmatian toadflax Linaria dalmatica ssp. dalmatica 2
denseflower cordgrass Spartina densiflora 2
desert lovegrass Eragrostis pectinacea var. miserrima 3
devils beggarticks Bidens frondosa 1
diffuse knapweed Centaurea diffusa 1
dotted smartweed Persicaria punctata 1
Douglas iris Iris douglasiana 2
drug fumitory Fumaria officinalis 1
Drummond's beeblossom Gaura drummondii 4
early watergrass Echinochloa oryzoides 2
English holly Ilex aquifolium 1
English ivy Hedera helix 3
English violet Viola odorata 1
European beachgrass Ammophila arenaria 2
fall panicum Panicum dichotomiflorum 2
feather fingergrass Chloris virgata 2
feathertop Pennisetum villosum 2
fennel Foeniculum vulgare 1
fiddleleaf dock Rumex pulcher 1
field bindweed Convolvulus arvensis 1
field brome Bromus arvensis 3
field sandbur Cenchrus spinifex 2
fireweed Chamerion angustifolium 2
fowl bluegrass Poa palustris 1
foxglove Digitalis purpurea 3
foxtail barley Hordeum jubatum 2
foxtail pricklegrass Crypsis alopecuroides 1
Fremont's deathcamas Zigadenus fremontii 1
fringed willowherb Epilobium ciliatum ssp. ciliatum 3
fringed willowherb Epilobium ciliatum ssp. watsonii 1
germander speedwell Veronica chamaedrys 1
giant foxtail Setaria faberi 1
giant ragweed Ambrosia trifida 2
giant reed Arundo donax 3
goosegrass Eleusine indica 1
greater ammi Ammi majus 1
green foxtail Setaria viridis 2
hairy beggarticks Bidens pilosa 1
hairy fleabane Conyza bonariensis 3
hairy purslane speedwell Veronica peregrina ssp. xalapensis 3
hardgrass Sclerochloa dura 1
hedgehog dogtailgrass Cynosurus echinatus 4
hedgeparsley Torilis arvensis 3
henbit Lamium amplexicaule 1
high mallow Malva sylvestris 1
hood canarygrass Phalaris paradoxa 3
Hooker's evening primrose Oenothera elata ssp. hookeri 2
horsenettle Solanum carolinense 2
horseweed Conyza canadensis 2
hyssop loosestrife Lythrum hyssopifolium 1
Indian tobacco Nicotiana quadrivalvis 1
Italian plumeless thistle Carduus pycnocephalus 2
Italian ryegrass Festuca perennis 1
Japanese knotweed Fallopia japonica 1
johnsongrass Sorghum halepense 5
jointed goatgrass Aegilops cylindrica 4
juniper mistletoe Phoradendron juniperinum 1
Kentucky bluegrass Poa pratensis 4
Kerner's dock Rumex kerneri 1
kikuyugrass Pennisetum clandestinum 1
knotgrass Paspalum distichum 2
knotted hedgeparsley Torilis nodosa 2
ladysthumb Persicaria maculosa 3
Lamarck's bedstraw Galium divaricatum 2
large crabgrass Digitaria sanguinalis 2
late barnyard grass Echinochloa oryzicola 3
Lehmann lovegrass Eragrostis lehmanniana 2
leporinum barley Hordeum murinum ssp. leporinum 1
little lovegrass Eragrostis minor 2
little mallow Malva parviflora 1
little quakinggrass Briza minor 3
littleseed canarygrass Phalaris minor 1
longroot smartweed Polygonum amphibium var. emersum 1
longspine sandbur Cenchrus longispinus 2
low amaranth Amaranthus deflexus 1
manyflower tobacco Nicotiana acuminata var. multiflora 3
marshpepper smartweed Polygonum hydropiper 3
meadow deathcamas Zigadenus venenosus var. venenosus 1
meadow foxtail Alopecurus pratensis 3
Mediterranean lovegrass Eragrostis barrelieri 4
Mediterranean sage Salvia aethiopis 1
medusahead Taeniatherum caput-medusae 1
Mexican lovegrass Eragrostis mexicana ssp. virescens 2
Mexican whorled milkweed Asclepias fascicularis 1
Moroccan toadflax Linaria maroccana 3
moss vervain Glandularia pulchella 1
moth mullein Verbascum blattaria 3
multiflora rose Rosa multiflora 2
musk thistle Carduus nutans 1
nimblewill Muhlenbergia schreberi 3
nit grass Gastridium phleoides 3
North African knapweed Centaurea diluta 1
oat Avena sativa 2
onionweed Asphodelus fistulosus 2
orangeberry nightshade Solanum lanceolatum 1
orchardgrass Dactylis glomerata 4
Pacific bentgrass Agrostis avenacea 1
Pacific poison-oak Toxicodendron diversilobum 1
Pacific rush Juncus effusus var. pacificus 1
pale smartweed Persicaria lapathifolia 1
paleseed plantain Plantago virginica 2
Palmer amaranth Amaranthus palmeri 2
panic veldtgrass Ehrharta erecta 1
panicle willowherb Epilobium brachycarpum 3
Pennsylvania blackberry Rubus pensilvanicus 1
Pennsylvania smartweed Polygonum pensylvanicum 2
pennyroyal Mentha pulegium 3
perennial pepperweed Lepidium latifolium 1
perennial ryegrass Lolium perenne 2
perennial veldtgrass Ehrharta calycina 3
Peruvian peppertree Schinus molle 2
pineapple-weed Matricaria discoidea 1
poison ryegrass Lolium temulentum 2
poison-hemlock Conium maculatum 2
poverty brome Bromus sterilis 1
prairie cupgrass Eriochloa contracta 3
punagrass Achnatherum brachychaetum 1
puncturevine Tribulus terrestris 1
purple deadnettle Lamium purpureum 1
purple loosestrife Lythrum salicaria 3
purple nutsedge Cyperus rotundus 2
purple pampasgrass Cortaderia jubata 2
purple toadflax Linaria purpurea 1
purplestamen mullein Verbascum virgatum 3
rabbitfoot polypogon Polypogon monspeliensis 2
rattlesnake brome Bromus briziformis 2
ravennagrass Ripidium ravennae 4
red larkspur Delphinium nudicaule 1
red sorrel Rumex acetosella 3
redflower gum Eucalyptus ficifolia 1
redroot pigweed Amaranthus retroflexus 2
redstem filaree Erodium cicutarium 1
reed canarygrass Phalaris arundinacea 2
rescuegrass Bromus catharticus 3
rigid ryegrass Lolium rigidum 1
ripgut brome Bromus diandrus 1
Rocky Mountain iris Iris missouriensis 1
rough barnyardgrass Echinochloa muricata 2
royal larkspur Delphinium variegatum ssp. variegatum 1
rush skeletonweed Chondrilla juncea 3
Russian knapweed Rhaponticum repens 1
sacred thorn-apple Datura wrightii 1
saltcedar Tamarix ramosissima 2
saltgrass Distichlis spicata 4
saltmeadow cordgrass Spartina patens 1
San Bernardino larkspur Delphinium parryi 1
scarlet gaura Gaura coccinea 2
scarlet pimpernel Lysimachia arvensis 2
seashore vervain Verbena montevidensis 1
seepwillow Baccharis salicifolia 1
shortfruit stork's bill Erodium brachycarpum 3
showy milkweed Asclepias speciosa 1
silverleaf nightshade Solanum elaeagnifolium 1
silversheath knotweed Polygonum argyrocoleon 1
skunkbush sumac Rhus trilobata 2
slender cinquefoil Potentilla gracilis 1
slender oat Avena barbata 3
slender speedwell Veronica filiformis 1
smilograss Piptatherum miliaceum 2
smooth barley Hordeum murinum ssp. glaucum 1
smooth bedstraw Galium mollugo 1
smooth brome Bromus inermis 3
smooth cordgrass Spartina alterniflora 2
smooth crabgrass Digitaria ischaemum 2
smooth pigweed Amaranthus hybridus 2
smutgrass Sporobolus indicus 3
soft brome Bromus hordeaceus 2
sorghum Sorghum bicolor 2
southwestern cupgrass Eriochloa acuminata 3
spearmint Mentha spicata 1
spiny amaranth Amaranthus spinosus 2
spiny plumeless thistle Carduus acanthoides 2
spotted knapweed Centaurea stoebe ssp. micranthos 1
spotted water hemlock Cicuta maculata var. angustifolia 2
spreading rush Juncus patens 1
squarrose knapweed Centaurea virgata 2
squirreltail fescue Vulpia bromoides 1
stinging nettle Urtica dioica ssp. holosericea 1
stinkgrass Eragrostis cilianensis 2
sulfur cinquefoil Potentilla recta 1
sulphur knapweed Centaurea sulphurea 2
swamp smartweed Persicaria hydropiperoides 1
sweet vernalgrass Anthoxanthum odoratum 4
sweetbriar rose Rosa eglanteria 1
Syrian beancaper Zygophyllum fabago 1
tall fescue Festuca arundinacea 3
tall fleabane Conyza floribunda 2
tall vervain Verbena bonariensis 2
tanglehead Heteropogon contortus 3
Tasmanian bluegum Eucalyptus globulus 2
three-cornered leek Allium triquetrum 1
toad rush Juncus bufonius 1
toothed dock Rumex dentatus 1
toothpick ammi Ammi visnaga 1
tree tobacco Nicotiana glauca 1
tree-of-heaven Ailanthus altissima 2
tumble pigweed Amaranthus albus 1
Uruguayan pampas grass Cortaderia selloana 3
vaseygrass Paspalum urvillei 1
velvetleaf Abutilon theophrasti 1
Venice mallow Hibiscus trionum 2
venus-comb Scandix pecten-veneris 1
vinegarweed Trichostema lanceolatum 1
wall bedstraw Galium parisiense 2
Washington fan palm Washingtonia robusta 2
water-bent Polypogon viridis 1
wavyleaf gaura Gaura sinuata 3
wavyleaf thistle Cirsium undulatum 1
weedy brome Bromus alopecuros 3
weeping lovegrass Eragrostis curvula 3
western ragweed Ambrosia psilostachya 1
western waterhemlock Cicuta douglasii 1
white bladderflower Araujia sericifera 1
white garlic Allium neapolitanum 2
white horehound Marrubium vulgare 1
white mulberry Morus alba 1
white ramping fumitory Fumaria capreolata 1
whitestem filaree Erodium moschatum 1
wild garlic Allium vineale 1
wild oat Avena fatua 1
witchgrass Panicum capillare 2
woolly distaff thistle Carthamus lanatus 2
yellow bedstraw Galium verum 2
yellow chamomile Anthemis tinctoria 1
yellow foxtail Setaria pumila 2
yellow glandweed Parentucellia viscosa 1
yellow nutsedge Cyperus esculentus 2
yellow toadflax Linaria vulgaris 2
yellow wall bedstraw Galium murale 2
yellowflag iris Iris pseudacorus 1
yellowspine thistle Cirsium ochrocentrum 1
zigzag larkspur Delphinium patens 1

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