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1704 species

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Subject Name Scientific Name Family Order
okra Abelmoschus esculentus Malvaceae Malvales
rosarypea Abrus precatorius Fabaceae (Leguminosae) Fabales
velvetleaf Abutilon theophrasti Malvaceae Malvales
cootamundra wattle Acacia baileyana Fabaceae (Leguminosae) Fabales
silver wattle Acacia dealbata Fabaceae (Leguminosae) Fabales
green wattle Acacia decurrens Fabaceae (Leguminosae) Fabales
sweet acacia Acacia farnesiana Fabaceae (Leguminosae) Fabales
black wattle Acacia mearnsii Fabaceae (Leguminosae) Fabales
black acacia Acacia melanoxylon Fabaceae (Leguminosae) Fabales
twisted acacia Acacia tortuosa Fabaceae (Leguminosae) Fabales
slender copperleaf Acalypha gracilens Euphorbiaceae Euphorbiales
hophornbeam copperleaf Acalypha ostryifolia Euphorbiaceae Euphorbiales
Virginia copperleaf Acalypha virginica Euphorbiaceae Euphorbiales
Paraguay starbur Acanthospermum australe Asteraceae Asterales
bristly starbur Acanthospermum hispidum Asteraceae Asterales
vine maple Acer circinatum Aceraceae Sapindales
bigleaf maple Acer macrophyllum Aceraceae Sapindales
boxelder Acer negundo Aceraceae Sapindales
Norway maple Acer platanoides Aceraceae Sapindales
red maple Acer rubrum Aceraceae Sapindales
sugar maple Acer saccharum Aceraceae Sapindales
common yarrow Achillea millefolium Asteraceae Asterales
sneezewort yarrow Achillea ptarmica Asteraceae Asterales
punagrass Achnatherum brachychaetum Poaceae Cyperales
American sweetflag Acorus calamus Acoraceae Arales
black cohosh Actaea racemosa var. racemosa Ranunculaceae Ranunculales
red baneberry Actaea rubra Ranunculaceae Ranunculales
spring adonis Adonis vernalis Ranunculaceae Ranunculales
jointed goatgrass Aegilops cylindrica Poaceae Cyperales
barb goatgrass Aegilops triuncialis Poaceae Cyperales
bishops goutweed Aegopodium podagraria Apiaceae Apiales
croftonweed Ageratina adenophora Asteraceae Asterales
white snakeroot Ageratina altissima Asteraceae Asterales
creeping croftonweed Ageratina riparia Asteraceae Asterales
tropic ageratum Ageratum conyzoides Asteraceae Asterales
crested wheatgrass Agropyron cristatum Poaceae Cyperales
Pacific bentgrass Agrostis avenacea Poaceae Cyperales
colonial bentgrass Agrostis capillaris Poaceae Cyperales
redtop Agrostis gigantea Poaceae Cyperales
creeping bentgrass Agrostis stolonifera Poaceae Cyperales
tree-of-heaven Ailanthus altissima Simaroubaceae Sapindales
silver hairgrass Aira caryophyllea Poaceae Cyperales
carpet bugle Ajuga reptans Lamiaceae Lamiales
mimosa Albizia julibrissin Fabaceae (Leguminosae) Fabales
hollyhock Alcea rosea Malvaceae Malvales
camelthorn Alhagi maurorum Fabaceae (Leguminosae) Fabales
northern waterplantain Alisma plantago-aquatica Alismataceae Alismatales
garlic mustard Alliaria petiolata Brassicaceae Capparales
tapertip onion Allium acuminatum Liliaceae Liliales
wild onion Allium canadense Liliaceae Liliales
textile onion Allium textile Liliaceae Liliales
three-cornered leek Allium triquetrum Liliaceae Liliales
wild garlic Allium vineale Liliaceae Liliales
European alder Alnus glutinosa Betulaceae Fagales
speckled alder Alnus incana ssp. rugosa Betulaceae Fagales
red alder Alnus rubra Betulaceae Fagales
meadow foxtail Alopecurus pratensis Poaceae Cyperales
mat chaff-flower Alternanthera caracasana Amaranthaceae Caryophyllales
alligatorweed Alternanthera philoxeroides Amaranthaceae Caryophyllales
khakiweed Alternanthera pungens Amaranthaceae Caryophyllales
sessile joyweed Alternanthera sessilis Amaranthaceae Caryophyllales
yellow alyssum Alyssum alyssoides Brassicaceae Capparales
tumble pigweed Amaranthus albus Amaranthaceae Caryophyllales
prostrate pigweed Amaranthus blitoides Amaranthaceae Caryophyllales
livid amaranth Amaranthus blitum Amaranthaceae Caryophyllales
low amaranth Amaranthus deflexus Amaranthaceae Caryophyllales
smooth pigweed Amaranthus hybridus Amaranthaceae Caryophyllales
Palmer amaranth Amaranthus palmeri Amaranthaceae Caryophyllales
Powell amaranth Amaranthus powellii Amaranthaceae Caryophyllales
redroot pigweed Amaranthus retroflexus Amaranthaceae Caryophyllales
common waterhemp Amaranthus rudis Amaranthaceae Caryophyllales
spiny amaranth Amaranthus spinosus Amaranthaceae Caryophyllales
tall waterhemp Amaranthus tuberculatus Amaranthaceae Caryophyllales
slender amaranth Amaranthus viridis Amaranthaceae Caryophyllales
annual bursage Ambrosia acanthicarpa Asteraceae Asterales
common ragweed Ambrosia artemisiifolia Asteraceae Asterales
annual ragweed Ambrosia artemisiifolia var. elatior Asteraceae Asterales
woollyleaf bursage Ambrosia grayi Asteraceae Asterales
western ragweed Ambrosia psilostachya Asteraceae Asterales
skeletonleaf bursage Ambrosia tomentosa Asteraceae Asterales
giant ragweed Ambrosia trifida Asteraceae Asterales
serviceberry Amelanchier alnifolia Rosaceae Rosales
Allegheny serviceberry Amelanchier laevis Rosaceae Rosales
redstem Ammannia coccinea Lythraceae Myrtales
greater ammi Ammi majus Apiaceae Apiales
toothpick ammi Ammi visnaga Apiaceae Apiales
European beachgrass Ammophila arenaria Poaceae Cyperales
leadplant Amorpha canescens Fabaceae (Leguminosae) Fabales
indigobush Amorpha fruticosa Fabaceae (Leguminosae) Fabales
peppervine Ampelopsis arborea Vitaceae Rhamnales
Douglas fiddleneck Amsinckia douglasiana Boraginaceae Lamiales
tarweed fiddleneck Amsinckia lycopsoides Boraginaceae Lamiales
common fiddleneck Amsinckia menziesii var. intermedia Boraginaceae Lamiales
western fiddleneck Amsinckia tessellata Boraginaceae Lamiales
pearly everlasting Anaphalis margaritacea Asteraceae Asterales
common bugloss Anchusa officinalis Boraginaceae Lamiales
big bluestem Andropogon gerardii Poaceae Cyperales
bushy bluestem Andropogon glomeratus Poaceae Cyperales
Elliott bluestem Andropogon gyrans Poaceae Cyperales
splitbeard bluestem Andropogon ternarius Poaceae Cyperales
broomsedge bluestem Andropogon virginicus Poaceae Cyperales
dill Anethum graveolens Apiaceae Apiales
spurred anoda Anoda cristata Malvaceae Malvales
madeiravine Anredera cordifolia Basellaceae Caryophyllales
plantainleaf pussytoes Antennaria plantaginifolia Asteraceae Asterales
corn chamomile Anthemis arvensis Asteraceae Asterales
stinking chamomile Anthemis cotula Asteraceae Asterales
yellow chamomile Anthemis tinctoria Asteraceae Asterales
sweet vernalgrass Anthoxanthum odoratum Poaceae Cyperales
bur chervil Anthriscus caucalis Apiaceae Apiales
chervil Anthriscus cerefolium Apiaceae Apiales
wild chervil Anthriscus sylvestris Apiaceae Apiales
snapdragon Antirrhinum majus Plantaginaceae Plantaginales
silky windgrass Apera spica-venti Poaceae Cyperales
spreading dogbane Apocynum androsaemifolium Apocynaceae Gentianales
hemp dogbane Apocynum cannabinum Apocynaceae Gentianales
baby sun rose Aptenia cordifolia Aizoaceae Caryophyllales
European columbine Aquilegia vulgaris Ranunculaceae Ranunculales
mouse-ear cress Arabidopsis thaliana Brassicaceae Capparales
tower-mustard Arabis glabra Brassicaceae Capparales
white bladderflower Araujia sericifera Asclepiadaceae Gentianales
Pacific madrone Arbutus menziesii Ericaceae Ericales
great burdock Arctium lappa Asteraceae Asterales
common burdock Arctium minus Asteraceae Asterales
bearberry Arctostaphylos uva-ursi Ericaceae Ericales
capeweed Arctotheca calendula Asteraceae Asterales
shoebutton ardisia Ardisia elliptica Myrsinaceae Primulales
thymeleaf sandwort Arenaria serpyllifolia Caryophyllaceae Caryophyllales
Mexican pricklepoppy Argemone mexicana Papaveraceae Papaverales
annual pricklepoppy Argemone polyanthemos Papaveraceae Papaverales
silverweed cinquefoil Argentina anserina Rosaceae Rosales
woollysheath threeawn Aristida lanosa Poaceae Cyperales
arrowfeather threeawn Aristida purpurascens Poaceae Cyperales
tall oatgrass Arrhenatherum elatius Poaceae Cyperales
absinth wormwood Artemisia absinthium Asteraceae Asterales
annual wormwood Artemisia annua Asteraceae Asterales
biennial wormwood Artemisia biennis Asteraceae Asterales
common sagewort Artemisia campestris Asteraceae Asterales
California mugwort Artemisia douglasiana Asteraceae Asterales
tarragon Artemisia dracunculus Asteraceae Asterales
sand sagebrush Artemisia filifolia Asteraceae Asterales
prairie sagewort Artemisia frigida Asteraceae Asterales
Louisiana wormwood Artemisia ludoviciana Asteraceae Asterales
big sagebrush Artemisia tridentata Asteraceae Asterales
mugwort Artemisia vulgaris Asteraceae Asterales
small carpetgrass, joint-head grass Arthraxon hispidus Poaceae Cyperales
giant reed Arundo donax Poaceae Cyperales
bloodflower milkweed Asclepias curassavica Asclepiadaceae Gentianales
woollypod milkweed Asclepias eriocarpa Asclepiadaceae Gentianales
Mexican whorled milkweed Asclepias fascicularis Asclepiadaceae Gentianales
swamp milkweed Asclepias incarnata Asclepiadaceae Gentianales
purple milkweed Asclepias purpurascens Asclepiadaceae Gentianales
showy milkweed Asclepias speciosa Asclepiadaceae Gentianales
western whorled milkweed Asclepias subverticillata Asclepiadaceae Gentianales
common milkweed Asclepias syriaca Asclepiadaceae Gentianales
butterfly milkweed Asclepias tuberosa Asclepiadaceae Gentianales
eastern whorled milkweed Asclepias verticillata Asclepiadaceae Gentianales
green milkweed Asclepias viridiflora Asclepiadaceae Gentianales
pawpaw Asimina triloba Annonaceae Magnoliales
asparagus Asparagus officinalis Liliaceae Liliales
catchweed Asperugo procumbens Boraginaceae Lamiales
onionweed Asphodelus fistulosus Liliaceae Liliales
twogrooved milkvetch Astragalus bisulcatus Fabaceae (Leguminosae) Fabales
timber milkvetch Astragalus miser Fabaceae (Leguminosae) Fabales
fourwing saltbush Atriplex canescens Chenopodiaceae Caryophyllales
shadscale Atriplex confertifolia Chenopodiaceae Caryophyllales
garden orach Atriplex hortensis Chenopodiaceae Caryophyllales
triangle orach Atriplex prostrata Chenopodiaceae Caryophyllales
red orach Atriplex rosea Chenopodiaceae Caryophyllales
Australian saltbush Atriplex semibaccata Chenopodiaceae Caryophyllales
slender oat Avena barbata Poaceae Cyperales
wild oat Avena fatua Poaceae Cyperales
oat Avena sativa Poaceae Cyperales
sterile oat Avena sterilis Poaceae Cyperales
carpetgrass Axonopus fissifolius Poaceae Cyperales
Carolina mosquitofern Azolla caroliniana Azollaceae Hydropteridales
Pacific mosquitofern Azolla filiculoides Azollaceae Hydropteridales
pinnate mosquitofern Azolla pinnata Azollaceae Hydropteridales
eastern baccharis Baccharis halimifolia Asteraceae Asterales
seepwillow Baccharis salicifolia Asteraceae Asterales
desertbroom Baccharis sarothroides Asteraceae Asterales
Monnier waterhyssop Bacopa monnieri Scrophulariaceae Scrophulariales
American yellow rocket Barbarea orthoceras Brassicaceae Capparales
early wintercress Barbarea verna Brassicaceae Capparales
yellow rocket Barbarea vulgaris Brassicaceae Capparales
fivehook bassia Bassia hyssopifolia Chenopodiaceae Caryophyllales
bellardia Bellardia trixago Scrophulariaceae Scrophulariales
English daisy Bellis perennis Asteraceae Asterales
Japanese barberry Berberis thunbergii Berberidaceae Ranunculales
European barberry Berberis vulgaris Berberidaceae Ranunculales
Alabama supplejack Berchemia scandens Rhamnaceae Rhamnales
hoary alyssum Berteroa incana Brassicaceae Capparales
river birch Betula nigra Betulaceae Fagales
bearded beggarticks Bidens aristosa Asteraceae Asterales
spanishneedles Bidens bipinnata Asteraceae Asterales
nodding beggarticks Bidens cernua Asteraceae Asterales
devils beggarticks Bidens frondosa Asteraceae Asterales
burmarigold Bidens laevis Asteraceae Asterales
hairy beggarticks Bidens pilosa Asteraceae Asterales
bur beggarticks Bidens tripartita Asteraceae Asterales
tall beggarticks Bidens vulgata Asteraceae Asterales
crossvine Bignonia capreolata Bignoniaceae Scrophulariales
plume poppy Bocconia frutescens Papaveraceae Papaverales
scarlet spiderling Boerhavia coccinea Nyctaginaceae Caryophyllales
common borage Borago officinalis Boraginaceae Lamiales
cane beardgrass Bothriochloa barbinodis Poaceae Cyperales
yellow bluestem Bothriochloa ischaemum var. songarica Poaceae Cyperales
pitted beardgrass Bothriochloa pertusa Poaceae Cyperales
hoary bowlesia Bowlesia incana Apiaceae Apiales
annual false-brome Brachypodium distachyon Poaceae Cyperales
perennial false-brome Brachypodium sylvaticum Poaceae Cyperales
watershield Brasenia schreberi Cabombaceae Nymphaeales
Indian mustard Brassica juncea Brassicaceae Capparales
rapeseed Brassica napus Brassicaceae Capparales
black mustard Brassica nigra Brassicaceae Capparales
birdsrape mustard Brassica rapa Brassicaceae Capparales
African mustard Brassica tournefortii Brassicaceae Capparales
big quakinggrass Briza maxima Poaceae Cyperales
little quakinggrass Briza minor Poaceae Cyperales
weedy brome Bromus alopecuros Poaceae Cyperales
Australian chess Bromus arenarius Poaceae Cyperales
field brome Bromus arvensis Poaceae Cyperales
rattlesnake brome Bromus briziformis Poaceae Cyperales
California brome Bromus carinatus Poaceae Cyperales
rescuegrass Bromus catharticus Poaceae Cyperales
ripgut brome Bromus diandrus Poaceae Cyperales
soft brome Bromus hordeaceus Poaceae Cyperales
smooth brome Bromus inermis Poaceae Cyperales
foxtail brome Bromus madritensis Poaceae Cyperales
mountain brome Bromus marginatus Poaceae Cyperales
red brome Bromus rubens Poaceae Cyperales
rye brome Bromus secalinus Poaceae Cyperales
poverty brome Bromus sterilis Poaceae Cyperales
cheatgrass Bromus tectorum Poaceae Cyperales
paper-mulberry Broussonetia papyrifera Moraceae Urticales
redvine Brunnichia ovata Polygonaceae Polygonales
white bryony Bryonia alba Cucurbitaceae Violales
butterflybush Buddleja davidii Buddlejaceae Scrophulariales
corn gromwell Buglossoides arvensis Boraginaceae Lamiales
crested bunias Bunias erucago Brassicaceae Capparales
Hill mustard Bunias orientalis Brassicaceae Capparales
flowering rush Butomus umbellatus Butomaceae Alismatales
fanwort Cabomba caroliniana Cabombaceae Nymphaeales
paradise poinciana Caesalpinia gilliesii Fabaceae (Leguminosae) Fabales
American searocket Cakile edentula Brassicaceae Capparales
redmaids Calandrinia ciliata Portulacaceae Caryophyllales
field marigold Calendula arvensis Asteraceae Asterales
purple poppymallow Callirhoe involucrata Malvaceae Malvales
waterstarwort Callitriche palustris Callitrichaceae Callitrichales
European waterstarwort Callitriche stagnalis Callitrichaceae Callitrichales
roostertree Calotropis procera Asclepiadaceae Gentianales
sprawling horseweed Calyptocarpus vialis Asteraceae Asterales
Japanese bindweed Calystegia hederacea Convolvulaceae Solanales
hedge bindweed Calystegia sepium Convolvulaceae Solanales
smallseed falseflax Camelina microcarpa Brassicaceae Capparales
clustered bellflower Campanula glomerata Campanulaceae Campanulales
creeping bellflower Campanula rapunculoides Campanulaceae Campanulales
harebell Campanula rotundifolia Campanulaceae Campanulales
American bellflower Campanulastrum americanum Campanulaceae Campanulales
trumpetcreeper Campsis radicans Bignoniaceae Scrophulariales
marijuana Cannabis sativa Cannabaceae Urticales
pale corydalis Capnoides sempervirens Fumariaceae Papaverales
shepherd's-purse Capsella bursa-pastoris Brassicaceae Capparales
hairy bittercress Cardamine hirsuta Brassicaceae Capparales
little western bittercress Cardamine oligosperma Brassicaceae Capparales
Pennsylvania bittercress Cardamine pensylvanica Brassicaceae Capparales
cuckoo bittercress Cardamine pratensis Brassicaceae Capparales
hairy whitetop Cardaria pubescens Brassicaceae Capparales
balloonvine Cardiospermum halicacabum Sapindaceae Sapindales
spiny plumeless thistle Carduus acanthoides Asteraceae Asterales
musk thistle Carduus nutans Asteraceae Asterales
Italian plumeless thistle Carduus pycnocephalus Asteraceae Asterales
slenderflower thistle Carduus tenuiflorus Asteraceae Asterales
wolftail sedge Carex cherokeensis Cyperaceae Cyperales
Frank sedge Carex frankii Cyperaceae Cyperales
waxy sedge Carex glaucescens Cyperaceae Cyperales
Nebraska sedge Carex nebrascensis Cyperaceae Cyperales
sea fig Carpobrotus chilensis Aizoaceae Caryophyllales
hottentot fig Carpobrotus edulis Aizoaceae Caryophyllales
woolly distaff thistle Carthamus lanatus Asteraceae Asterales
wild safflower Carthamus oxyacanthus Asteraceae Asterales
common caraway Carum carvi Apiaceae Apiales
pignut hickory Carya glabra Juglandaceae Juglandales
Australian-pine Casuarina equisetifolia Casuarinaceae Casuarinales
gray sheoak Casuarina glauca Casuarinaceae Casuarinales
southern catalpa Catalpa bignonioides Bignoniaceae Scrophulariales
Madagascar periwinkle Catharanthus roseus Apocynaceae Gentianales
New Jersey tea Ceanothus americanus Rhamnaceae Rhamnales
prostrate ceanothus Ceanothus prostratus Rhamnaceae Rhamnales
snowbrush ceanothus Ceanothus velutinus Rhamnaceae Rhamnales
oriental bittersweet Celastrus orbiculatus Celastraceae Celastrales
southern sandbur Cenchrus echinatus Poaceae Cyperales
longspine sandbur Cenchrus longispinus Poaceae Cyperales
field sandbur Cenchrus spinifex Poaceae Cyperales
purple starthistle Centaurea calcitrapa Asteraceae Asterales
cornflower Centaurea cyanus Asteraceae Asterales
diffuse knapweed Centaurea diffusa Asteraceae Asterales
North African knapweed Centaurea diluta Asteraceae Asterales
brown knapweed Centaurea jacea Asteraceae Asterales
Malta starthistle Centaurea melitensis Asteraceae Asterales
perennial cornflower Centaurea montana Asteraceae Asterales
black knapweed Centaurea nigra Asteraceae Asterales
alpine knapweed Centaurea nigrescens Asteraceae Asterales
yellow starthistle Centaurea solstitialis Asteraceae Asterales
spotted knapweed Centaurea stoebe ssp. micranthos Asteraceae Asterales
sulphur knapweed Centaurea sulphurea Asteraceae Asterales
Asiatic pennywort Centella asiatica Apiaceae Apiales
erect centella Centella erecta Apiaceae Apiales
red valerian Centranthus ruber Valerianaceae Dipsacales
common tarweed Centromadia pungens ssp. pungens Asteraceae Asterales
buttonbush Cephalanthus occidentalis Rubiaceae Rubiales
field chickweed Cerastium arvense Caryophyllaceae Caryophyllales
common mouse-ear chickweed Cerastium fontanum Caryophyllaceae Caryophyllales
big chickweed Cerastium fontanum ssp. vulgare Caryophyllaceae Caryophyllales
sticky chickweed Cerastium glomeratum Caryophyllaceae Caryophyllales
bur buttercup Ceratocephala testiculata Ranunculaceae Ranunculales
coontail Ceratophyllum demersum Parmeliaceae Lecanorales
watersprite Ceratopteris thalictroides Parkeriaceae Polypodiales
day jessamine Cestrum diurnum Solanaceae Solanales
partridgepea Chamaecrista fasciculata Fabaceae (Leguminosae) Fabales
sensitive partridgepea Chamaecrista nictitans Fabaceae (Leguminosae) Fabales
ridgeseed spurge Chamaesyce glyptosperma Euphorbiaceae Euphorbiales
garden spurge Chamaesyce hirta Euphorbiaceae Euphorbiales
prostrate spurge Chamaesyce humistrata Euphorbiaceae Euphorbiales
nodding spurge Chamaesyce nutans Euphorbiaceae Euphorbiales
ground spurge Chamaesyce prostrata Euphorbiaceae Euphorbiales
fireweed Chamerion angustifolium Onagraceae Myrtales
greater celandine Chelidonium majus Papaveraceae Papaverales
lambsquarters Chenopodium album Chenopodiaceae Caryophyllales
Missouri lambsquarters Chenopodium album var. missouriense Chenopodiaceae Caryophyllales
perennial goosefoot Chenopodium bonus-henricus Chenopodiaceae Caryophyllales
Jerusalem-oak goosefoot Chenopodium botrys Chenopodiaceae Caryophyllales
blite goosefoot Chenopodium capitatum Chenopodiaceae Caryophyllales
figleaved goosefoot Chenopodium ficifolium Chenopodiaceae Caryophyllales
cutleaf goosefoot Chenopodium multifidum Chenopodiaceae Caryophyllales
nettleleaf goosefoot Chenopodium murale Chenopodiaceae Caryophyllales
giantseed goosefoot Chenopodium simplex Chenopodiaceae Caryophyllales
rhodesgrass Chloris gayana Poaceae Cyperales
Australian fingergrass Chloris truncata Poaceae Cyperales
feather fingergrass Chloris virgata Poaceae Cyperales
rush skeletonweed Chondrilla juncea Asteraceae Asterales
blue mustard Chorispora tenella Brassicaceae Capparales
pilipiliula Chrysopogon aciculatus Poaceae Cyperales
Douglas rabbitbrush Chrysothamnus viscidiflorus Asteraceae Asterales
chicory Cichorium intybus Asteraceae Asterales
bulbous waterhemlock Cicuta bulbifera Apiaceae Apiales
western waterhemlock Cicuta douglasii Apiaceae Apiales
spotted waterhemlock Cicuta maculata Apiaceae Apiales
Canada thistle Cirsium arvense Asteraceae Asterales
field thistle Cirsium discolor Asteraceae Asterales
Indian thistle Cirsium edule Asteraceae Asterales
yellow thistle Cirsium horridulum Asteraceae Asterales
western thistle Cirsium occidentale Asteraceae Asterales
yellowspine thistle Cirsium ochrocentrum Asteraceae Asterales
meadow thistle Cirsium scariosum Asteraceae Asterales
wavyleaf thistle Cirsium undulatum Asteraceae Asterales
bull thistle Cirsium vulgare Asteraceae Asterales
rock rose Cistus creticus Cistaceae Violales
citronmelon Citrullus lanatus var. citroides Cucurbitaceae Violales
watermelon Citrullus lanatus var. lanatus Cucurbitaceae Violales
broadleaf spring-beauty Claytonia caroliniana Portulacaceae Caryophyllales
miner's lettuce Claytonia perfoliata Portulacaceae Caryophyllales
narrowleaf spring-beauty Claytonia virginica Portulacaceae Caryophyllales
western white clematis Clematis ligusticifolia Ranunculaceae Ranunculales
oriental virginsbower Clematis orientalis Ranunculaceae Ranunculales
devil's darning needles Clematis virginiana Ranunculaceae Ranunculales
evergreen clematis Clematis vitalba Ranunculaceae Ranunculales
spiderwisp Cleome gynandra Capparaceae Capparales
yellow spiderflower Cleome lutea Capparaceae Capparales
Rocky Mountain beeplant Cleome serrulata Capparaceae Capparales
soapbush Clidemia hirta Melastomataceae Myrtales
bluebead-lily Clintonia borealis Liliaceae Liliales
blessed thistle Cnicus benedictus Asteraceae Asterales
bullnettle Cnidoscolus stimulosus Euphorbiaceae Euphorbiales
Texas bullnettle Cnidoscolus texanus Euphorbiaceae Euphorbiales
ivy gourd Coccinia grandis Cucurbitaceae Violales
redberry moonseed Cocculus carolinus Menispermaceae Ranunculales
coco yam, wild taro Colocasia esculenta Araceae Arales
Benghal dayflower Commelina benghalensis Commelinaceae Commelinales
Asiatic dayflower Commelina communis Commelinaceae Commelinales
spreading dayflower Commelina diffusa Commelinaceae Commelinales
sweetfern Comptonia peregrina Myricaceae Myricales
narrow-leaved iceplant Conicosia pugioniformis Aizoaceae Caryophyllales
poison-hemlock Conium maculatum Apiaceae Apiales
blue mistflower Conoclinium coelestinum Asteraceae Asterales
European lily of the valley Convallaria majalis Liliaceae Liliales
mallow bindweed Convolvulus althaeoides Convolvulaceae Solanales
field bindweed Convolvulus arvensis Convolvulaceae Solanales
Texas bindweed Convolvulus equitans Convolvulaceae Solanales
hairy fleabane Conyza bonariensis Asteraceae Asterales
horseweed Conyza canadensis Asteraceae Asterales
tall fleabane Conyza floribunda Asteraceae Asterales
creeping mirrorplant Coprosma repens Rubiaceae Rubiales
canker-root Coptis trifolia Ranunculaceae Ranunculales
cabbage tree Cordyline australis Liliaceae Liliales
lanceleaf tickseed Coreopsis lanceolata Asteraceae Asterales
plains coreopsis Coreopsis tinctoria Asteraceae Asterales
whorled coreopsis Coreopsis verticillata Asteraceae Asterales
coriander Coriandrum sativum Apiaceae Apiales
bunchberry Cornus canadensis Cornaceae Cornales
flowering dogwood Cornus florida Cornaceae Cornales
Pacific dogwood Cornus nuttallii Cornaceae Cornales
lesser swinecress Coronopus didymus Brassicaceae Capparales
greater swinecress Coronopus squamatus Brassicaceae Capparales
purple pampasgrass Cortaderia jubata Poaceae Cyperales
Uruguayan pampas grass Cortaderia selloana Poaceae Cyperales
beaked hazelnut Corylus cornuta Betulaceae Fagales
milkflower cotoneaster Cotoneaster coriaceus Rosaceae Rosales
orange cotoneaster Cotoneaster franchetii Rosaceae Rosales
silverleaf cotoneaster Cotoneaster pannosus Rosaceae Rosales
southern brassbuttons Cotula australis Asteraceae Asterales
brassbuttons Cotula coronopifolia Asteraceae Asterales
Mexican brassbuttons Cotula mexicana Asteraceae Asterales
cockspur hawthorn Crataegus crus-galli Rosaceae Rosales
black hawthorn Crataegus douglasii Rosaceae Rosales
parsley hawthorn Crataegus marshallii Rosaceae Rosales
English hawthorn Crataegus monogyna Rosaceae Rosales
pasture hawthorn Crataegus spathulata Rosaceae Rosales
smooth hawksbeard Crepis capillaris Asteraceae Asterales
bristly hawksbeard Crepis setosa Asteraceae Asterales
narrowleaf hawksbeard Crepis tectorum Asteraceae Asterales
alkaliweed Cressa truxillensis Convolvulaceae Solanales
seven sisters swamplily Crinum americanum Liliaceae Liliales
wedge-leaf rattlebox Crotalaria retusa Fabaceae (Leguminosae) Fabales
showy rattlebox Crotalaria spectabilis Fabaceae (Leguminosae) Fabales
woolly croton Croton capitatus Euphorbiaceae Euphorbiales
tropic croton Croton glandulosus var. septentrionalis Euphorbiaceae Euphorbiales
Turkey mullein Croton setiger Euphorbiaceae Euphorbiales
common crupina Crupina vulgaris Asteraceae Asterales
foxtail pricklegrass Crypsis alopecuroides Poaceae Cyperales
swamp pricklegrass Crypsis schoenoides Poaceae Cyperales
melon Cucumis melo Cucurbitaceae Violales
buffalo gourd Cucurbita foetidissima Cucurbitaceae Violales
Texas gourd Cucurbita pepo var. texana Cucurbitaceae Violales
carrotwood Cupaniopsis anacardioides Sapindaceae Sapindales
tarweed cuphea Cuphea carthagenensis Lythraceae Myrtales
smallseed alfalfa dodder Cuscuta approximata Cuscutaceae Solanales
flax dodder Cuscuta epilinum Cuscutaceae Solanales
clover dodder Cuscuta epithymum Cuscutaceae Solanales
swamp dodder Cuscuta gronovii Cuscutaceae Solanales
largeseed dodder Cuscuta indecora Cuscutaceae Solanales
field dodder Cuscuta pentagona Cuscutaceae Solanales
Sandwich dodder Cuscuta sandwichiana Cuscutaceae Solanales
giant sumpweed Cyclachaena xanthifolia Asteraceae Asterales
wild celery Cyclospermum leptophyllum Apiaceae Apiales
Kenilworth ivy Cymbalaria muralis Scrophulariaceae Scrophulariales
barbwire grass Cymbopogon refractus Poaceae Cyperales
honeyvine swallowwort Cynanchum laeve Asclepiadaceae Gentianales
Black dog-strangling vine, black swallowwort Cynanchum louiseae Asclepiadaceae Gentianales
dog-strangling vine, European swallowwort Cynanchum rossicum Asclepiadaceae Gentianales
cardoon Cynara cardunculus Asteraceae Asterales
bermudagrass Cynodon dactylon Poaceae Cyperales
houndstongue Cynoglossum officinale Boraginaceae Lamiales
crested dogtailgrass Cynosurus cristatus Poaceae Cyperales
hedgehog dogtailgrass Cynosurus echinatus Poaceae Cyperales
tapertip flatsedge Cyperus acuminatus Cyperaceae Cyperales
aggregate sedge Cyperus aggregatus Cyperaceae Cyperales
foxtail flatsedge Cyperus alopecuroides Cyperaceae Cyperales
annual sedge Cyperus compressus Cyperaceae Cyperales
globe sedge Cyperus croceus Cyperaceae Cyperales
coastal plain flatsedge Cyperus cuspidatus Cyperaceae Cyperales
smallflower umbrella sedge Cyperus difformis Cyperaceae Cyperales
globe flatsedge Cyperus echinatus Cyperaceae Cyperales
deeprooted sedge Cyperus entrerianus Cyperaceae Cyperales
tall flatsedge Cyperus eragrostis Cyperaceae Cyperales
redroot flatsedge Cyperus erythrorhizos Cyperaceae Cyperales
yellow nutsedge Cyperus esculentus Cyperaceae Cyperales
whiteedge flatsedge Cyperus flavicomus Cyperaceae Cyperales
brown flatsedge Cyperus fuscus Cyperaceae Cyperales
rice flatsedge Cyperus iria Cyperaceae Cyperales
lance sedge Cyperus lanceolatus Cyperaceae Cyperales
flatsedge Cyperus odoratus Cyperaceae Cyperales
sharpscale flatsedge Cyperus oxylepis Cyperaceae Cyperales
pilose sedge Cyperus pilosus Cyperaceae Cyperales
miniature flatsedge Cyperus prolifer Cyperaceae Cyperales
knob sedge Cyperus pseudovegetus Cyperaceae Cyperales
cylindric sedge Cyperus retrorsus Cyperaceae Cyperales
purple nutsedge Cyperus rotundus Cyperaceae Cyperales
bloodscale sedge Cyperus sanguinolentus Cyperaceae Cyperales
bearded flatsedge Cyperus squarrosus Cyperaceae Cyperales
false nutsedge Cyperus strigosus Cyperaceae Cyperales
Surinam sedge Cyperus surinamensis Cyperaceae Cyperales
green sedge Cyperus virens Cyperaceae Cyperales
Scotch broom Cytisus scoparius Fabaceae (Leguminosae) Fabales
striated broom Cytisus striatus Fabaceae (Leguminosae) Fabales
orchardgrass Dactylis glomerata Poaceae Cyperales
crowfootgrass Dactyloctenium aegyptium Poaceae Cyperales
February daphne Daphne mezereum Thymelaeaceae Myrtales
shrubby cinquefoil Dasiphora fruticosa ssp. floribunda Rosaceae Rosales
Chinese thorn-apple Datura quercifolia Solanaceae Solanales
jimsonweed Datura stramonium Solanaceae Solanales
sacred thorn-apple Datura wrightii Solanaceae Solanales
Queen Anne's lace, wild carrot Daucus carota Apiaceae Apiales
southwestern carrot Daucus pusillus Apiaceae Apiales
swamp loosestrife Decodon verticillatus Lythraceae Myrtales
Kellogg's tarweed Deinandra kelloggii Asteraceae Asterales
cape ivy Delairea odorata Asteraceae Asterales
tall larkspur Delphinium barbeyi Ranunculaceae Ranunculales
Carolina larkspur Delphinium carolinianum Ranunculaceae Ranunculales
low larkspur Delphinium nuttallianum Ranunculaceae Ranunculales
dwarf larkspur Delphinium tricorne Ranunculaceae Ranunculales
duncecap larkspur Delphinium x occidentale Ranunculaceae Ranunculales
hay-scented fern Dennstaedtia punctilobula Dennstaedtiaceae Polypodiales
mountain tansymustard Descurainia incana Brassicaceae Capparales
mountain tansymustard Descurainia incana ssp. incisa Brassicaceae Capparales
pinnate tansymustard Descurainia pinnata Brassicaceae Capparales
flixweed Descurainia sophia Brassicaceae Capparales
Illinois bundleflower Desmanthus illinoensis Fabaceae (Leguminosae) Fabales
creeping beggarweed Desmodium incanum Fabaceae (Leguminosae) Fabales
sessile tickclover Desmodium sessilifolium Fabaceae (Leguminosae) Fabales
Florida beggarweed Desmodium tortuosum Fabaceae (Leguminosae) Fabales
Deptford pink Dianthus armeria Caryophyllaceae Caryophyllales
deertongue Dichanthelium clandestinum Poaceae Cyperales
bluedicks Dichelostemma capitatum Liliaceae Liliales
Carolina dichondra Dichondra carolinensis Convolvulaceae Solanales
Asian ponysfoot Dichondra micrantha Convolvulaceae Solanales
aroma Dichrostachys cinerea Fabaceae (Leguminosae) Fabales
bush honeysuckle Diervilla lonicera Caprifoliaceae Dipsacales
foxglove Digitalis purpurea Scrophulariaceae Scrophulariales
African couchgrass Digitaria abyssinica Poaceae Cyperales
southern crabgrass Digitaria ciliaris Poaceae Cyperales
sourgrass Digitaria insularis Poaceae Cyperales
smooth crabgrass Digitaria ischaemum Poaceae Cyperales
large crabgrass Digitaria sanguinalis Poaceae Cyperales
velvet fingergrass Digitaria velutina Poaceae Cyperales
glandular Cape marigold Dimorphotheca sinuata Asteraceae Asterales
poorjoe Diodia teres Rubiaceae Rubiales
Virginia buttonweed Diodia virginiana Rubiaceae Rubiales
winged yam Dioscorea alata Dioscoreaceae Dioscoreales
air-potato Dioscorea bulbifera Dioscoreaceae Dioscoreales
common persimmon Diospyros virginiana Ebenaceae Ebenales
wall rocket Diplotaxis tenuifolia Brassicaceae Capparales
common teasel Dipsacus fullonum Dipsacaceae Dipsacales
cutleaf teasel Dipsacus laciniatus Dipsacaceae Dipsacales
Fuller's teasel Dipsacus sativus Dipsacaceae Dipsacales
saltgrass Distichlis spicata Poaceae Cyperales
stinkwort Dittrichia graveolens Asteraceae Asterales
wood whitlowgrass Draba nemorosa Brassicaceae Capparales
spring whitlowgrass Draba verna Brassicaceae Capparales
clasping coneflower Dracopis amplexicaulis Asteraceae Asterales
alfombrilla Drymaria arenarioides Caryophyllaceae Caryophyllales
Indian mock-strawberry Duchesnea indica Rosaceae Rosales
mexicantea Dysphania ambrosioides Chenopodiaceae Caryophyllales
clammy goosefoot Dysphania pumilio Chenopodiaceae Caryophyllales
pale echinacea Echinacea pallida Asteraceae Asterales
purple coneflower Echinacea purpurea Asteraceae Asterales
junglerice Echinochloa colona Poaceae Cyperales
barnyardgrass Echinochloa crus-galli Poaceae Cyperales
gulf cockspur Echinochloa crus-pavonis Poaceae Cyperales
rough barnyardgrass Echinochloa muricata Poaceae Cyperales
rough barnyardgrass Echinochloa muricata var. microstachya Poaceae Cyperales
late barnyard grass Echinochloa oryzicola Poaceae Cyperales
early watergrass Echinochloa oryzoides Poaceae Cyperales
wild cucumber Echinocystis lobata Cucurbitaceae Violales
creeping burhead Echinodorus cordifolius Alismataceae Alismatales
great globethistle Echinops sphaerocephalus Asteraceae Asterales
pride of Madeira Echium candicans Boraginaceae Lamiales
pine echium Echium pininana Boraginaceae Lamiales
salvation jane Echium plantagineum Boraginaceae Lamiales
blueweed Echium vulgare Boraginaceae Lamiales
eclipta Eclipta prostrata Asteraceae Asterales
Brazilian waterweed Egeria densa Hydrocharitaceae Hydrocharitales
perennial veldtgrass Ehrharta calycina Poaceae Cyperales
panic veldtgrass Ehrharta erecta Poaceae Cyperales
longflowered veldtgrass Ehrharta longiflora Poaceae Cyperales
anchored waterhyacinth Eichhornia azurea Pontederiaceae Liliales
waterhyacinth Eichhornia crassipes Pontederiaceae Liliales
Russian-olive Elaeagnus angustifolia Elaeagnaceae Rhamnales
autumn-olive Elaeagnus umbellata Elaeagnaceae Rhamnales
slender spikerush Eleocharis baldwinii Cyperaceae Cyperales
squarestem spikerush Eleocharis quadrangulata Cyperaceae Cyperales
purple elephant's-foot Elephantopus nudatus Asteraceae Asterales
goosegrass Eleusine indica Poaceae Cyperales
threespike goosegrass Eleusine tristachya Poaceae Cyperales
common elodea Elodea canadensis Hydrocharitaceae Hydrocharitales
western elodea Elodea nuttallii Hydrocharitaceae Hydrocharitales
Canada wildrye Elymus canadensis Cyperaceae Cyperales
squirreltail Elymus elymoides Poaceae Cyperales
quackgrass Elymus repens Poaceae Cyperales
three-cornered jack Emex australis Polygonaceae Polygonales
spiny emex Emex spinosa Polygonaceae Polygonales
Cupid's-shaving-brush Emilia fosbergii Asteraceae Asterales
panicle willowherb Epilobium brachycarpum Onagraceae Myrtales
hairy willowherb Epilobium hirsutum Onagraceae Myrtales
helleborine Epipactis helleborine Orchidaceae Orchidales
field horsetail Equisetum arvense Equisetaceae Equisetales
scouringrush Equisetum hyemale Equisetaceae Equisetales
smooth horsetail Equisetum laevigatum Equisetaceae Equisetales
Mediterranean lovegrass Eragrostis barrelieri Poaceae Cyperales
stinkgrass Eragrostis cilianensis Poaceae Cyperales
weeping lovegrass Eragrostis curvula Poaceae Cyperales
bigtop lovegrass Eragrostis hirsuta Poaceae Cyperales
Lehmann lovegrass Eragrostis lehmanniana Poaceae Cyperales
Mexican lovegrass Eragrostis mexicana Poaceae Cyperales
little lovegrass Eragrostis minor Poaceae Cyperales
tufted lovegrass Eragrostis pectinacea Poaceae Cyperales
India lovegrass Eragrostis pilosa Poaceae Cyperales
purple lovegrass Eragrostis spectabilis Poaceae Cyperales
cutleaf burnweed Erechtites glomeratus Asteraceae Asterales
American burnweed Erechtites hieraciifolius Asteraceae Asterales
Australian burnweed Erechtites minimus Asteraceae Asterales
rubber rabbitbrush Ericameria nauseosa Asteraceae Asterales
Parry rabbitbrush Ericameria parryi Asteraceae Asterales
annual fleabane Erigeron annuus Asteraceae Asterales
poor-robin fleabane Erigeron pulchellus Asteraceae Asterales
Oregon fleabane Erigeron speciosus Asteraceae Asterales
rough fleabane Erigeron strigosus Asteraceae Asterales
southwestern cupgrass Eriochloa acuminata Poaceae Cyperales
prairie cupgrass Eriochloa contracta Poaceae Cyperales
woolly cupgrass Eriochloa villosa Poaceae Cyperales
common woolly sunflower Eriophyllum lanatum Asteraceae Asterales
broadleaf filaree Erodium botrys Geraniaceae Geraniales
shortfruit stork's bill Erodium brachycarpum Geraniaceae Geraniales
redstem filaree Erodium cicutarium Geraniaceae Geraniales
whitestem filaree Erodium moschatum Geraniaceae Geraniales
Texas filaree Erodium texanum Geraniaceae Geraniales
button snakeroot Eryngium yuccifolium Apiaceae Apiales
Western wallflower Erysimum asperum Brassicaceae Capparales
wallflower mustard Erysimum cheiranthoides Brassicaceae Capparales
bushy wallflower Erysimum repandum Brassicaceae Capparales
California poppy Eschscholzia californica Papaveraceae Papaverales
Tasmanian bluegum Eucalyptus globulus Myrtaceae Myrtales
European spindletree Euonymus europaeus Celastraceae Celastrales
dogfennel Eupatorium capillifolium Asteraceae Asterales
yankeeweed Eupatorium compositifolium Asteraceae Asterales
trumpetweed Eupatorium fistulosum Asteraceae Asterales
boneset Eupatorium perfoliatum Asteraceae Asterales
sweet joepyeweed Eupatorium purpureum Asteraceae Asterales
late boneset Eupatorium serotinum Asteraceae Asterales
flowering spurge Euphorbia corollata Euphorbiaceae Euphorbiales
painted poinsettia Euphorbia cyathophora Euphorbiaceae Euphorbiales
cypress spurge Euphorbia cyparissias Euphorbiaceae Euphorbiales
toothed spurge Euphorbia dentata Euphorbiaceae Euphorbiales
leafy spurge Euphorbia esula Euphorbiaceae Euphorbiales
sun spurge Euphorbia helioscopia Euphorbiaceae Euphorbiales
wild poinsettia Euphorbia heterophylla Euphorbiaceae Euphorbiales
moleplant Euphorbia lathyris Euphorbiaceae Euphorbiales
spotted spurge Euphorbia maculata Euphorbiaceae Euphorbiales
snow-on-the-mountain Euphorbia marginata Euphorbiaceae Euphorbiales
myrtle spurge Euphorbia myrsinites Euphorbiaceae Euphorbiales
petty spurge Euphorbia peplus Euphorbiaceae Euphorbiales
creeping spurge Euphorbia serpens Euphorbiaceae Euphorbiales
netseed spurge Euphorbia spathulata Euphorbiaceae Euphorbiales
Geraldton carnation weed Euphorbia terracina Euphorbiaceae Euphorbiales
narrowleaf goldenrod Euthamia graminifolia Asteraceae Asterales
slender goldenrod Euthamia tenuifolia Asteraceae Asterales
buckwheat Fagopyrum esculentum Polygonaceae Polygonales
wild buckwheat Fallopia convolvulus Polygonaceae Polygonales
Japanese knotweed Fallopia japonica Polygonaceae Polygonales
Sakhalin knotweed Fallopia sachalinensis Polygonaceae Polygonales
Bohemian knotweed Fallopia x bohemica Polygonaceae Polygonales
mulberryweed Fatoua villosa Moraceae Urticales
tall fescue Festuca arundinacea Poaceae Cyperales
hair fescue Festuca filiformis Poaceae Cyperales
Italian ryegrass Festuca perennis Poaceae Cyperales
red fescue Festuca rubra Poaceae Cyperales
edible fig Ficus carica Moraceae Urticales
dropwort Filipendula vulgaris Rosaceae Rosales
clusterflower Flaveria trinervia Asteraceae Asterales
fennel Foeniculum vulgare Apiaceae Apiales
wild strawberry Fragaria virginiana Rosaceae Rosales
glossy buckthorn Frangula alnus Rhamnaceae Rhamnales
white ash Fraxinus americana Oleaceae Scrophulariales
green ash Fraxinus pennsylvanica Oleaceae Scrophulariales
plains snakecotton Froelichia floridana Amaranthaceae Caryophyllales
white ramping fumitory Fumaria capreolata Fumariaceae Papaverales
drug fumitory Fumaria officinalis Fumariaceae Papaverales
rosering gaillardia Gaillardia pulchella Asteraceae Asterales
goatsrue Galega officinalis Fabaceae (Leguminosae) Fabales
common hempnettle Galeopsis tetrahit Lamiaceae Lamiales
smallflower galinsoga Galinsoga parviflora Asteraceae Asterales
hairy galinsoga Galinsoga quadriradiata Asteraceae Asterales
catchweed bedstraw Galium aparine Rubiaceae Rubiales
rough bedstraw Galium asprellum Rubiaceae Rubiales
northern bedstraw Galium boreale Rubiaceae Rubiales
Lamarck's bedstraw Galium divaricatum Rubiaceae Rubiales
smooth bedstraw Galium mollugo Rubiaceae Rubiales
yellow wall bedstraw Galium murale Rubiaceae Rubiales
wall bedstraw Galium parisiense Rubiaceae Rubiales
yellow bedstraw Galium verum Rubiaceae Rubiales
purple cudweed Gamochaeta purpurea Asteraceae Asterales
nit grass Gastridium phleoides Poaceae Cyperales
wintergreen Gaultheria procumbens Ericaceae Ericales
salal Gaultheria shallon Ericaceae Ericales
scarlet gaura Gaura coccinea Onagraceae Myrtales
Drummond's beeblossom Gaura drummondii Onagraceae Myrtales
wavyleaf gaura Gaura sinuata Onagraceae Myrtales
black huckleberry Gaylussacia baccata Ericaceae Ericales
French broom Genista monspessulana Fabaceae (Leguminosae) Fabales
Dyer's greenweed Genista tinctoria Fabaceae (Leguminosae) Fabales
Carolina geranium Geranium carolinianum Geraniaceae Geraniales
cutleaf geranium Geranium dissectum Geraniaceae Geraniales
wild geranium Geranium maculatum Geraniaceae Geraniales
dovefoot geranium Geranium molle Geraniaceae Geraniales
New Zealand geranium Geranium retrorsum Geraniaceae Geraniales
herb-robert Geranium robertianum Geraniaceae Geraniales
yellow avens Geum aleppicum Rosaceae Rosales
rose vervain Glandularia canadensis Verbenaceae Lamiales
moss vervain Glandularia pulchella Verbenaceae Lamiales
ground ivy Glechoma hederacea Lamiaceae Lamiales
honeylocust Gleditsia triacanthos Fabaceae (Leguminosae) Fabales
soybean Glycine max Fabaceae (Leguminosae) Fabales
wild licorice Glycyrrhiza lepidota Fabaceae (Leguminosae) Fabales
western marsh cudweed Gnaphalium palustre Asteraceae Asterales
cotton Gossypium hirsutum Malvaceae Malvales
kahiliflower Grevillea banksii Proteaceae Proteales
Great Valley gumweed Grindelia camporum Asteraceae Asterales
curlycup gumweed Grindelia squarrosa Asteraceae Asterales
broom snakeweed Gutierrezia sarothrae Asteraceae Asterales
babysbreath Gypsophila paniculata Caryophyllaceae Caryophyllales
western stickseed Hackelia floribunda Boraginaceae Lamiales
halogeton Halogeton glomeratus Chenopodiaceae Caryophyllales
English ivy Hedera helix Araliaceae Apiales
Algerian ivy Hedera helix ssp. canariensis Araliaceae Apiales
bitter sneezeweed Helenium amarum Asteraceae Asterales
common sneezeweed Helenium autumnale Asteraceae Asterales
Bigelow's sneezeweed Helenium bigelovii Asteraceae Asterales
common sunflower Helianthus annuus Asteraceae Asterales
Maximilian sunflower Helianthus maximiliani Asteraceae Asterales
Nuttall's sunflower Helianthus nuttallii Asteraceae Asterales
prairie sunflower Helianthus petiolaris Asteraceae Asterales
Jerusalem artichoke Helianthus tuberosus Asteraceae Asterales
strawflower Helichrysum petiolare Asteraceae Asterales
oxeye Heliopsis helianthoides Asteraceae Asterales
clasping heliotrope Heliotropium amplexicaule Boraginaceae Lamiales
seaside heliotrope Heliotropium curassavicum Boraginaceae Lamiales
European heliotrope Heliotropium europaeum Boraginaceae Lamiales
Indian heliotrope Heliotropium indicum Boraginaceae Lamiales
bristly oxtongue Helminthotheca echioides Asteraceae Asterales
tawny daylily Hemerocallis fulva Liliaceae Liliales
Fitch's tarweed Hemizonia fitchii Asteraceae Asterales
giant hogweed Heracleum mantegazzianum Apiaceae Apiales
common cowparsnip Heracleum maximum Apiaceae Apiales
damesrocket Hesperis matronalis Brassicaceae Capparales
ducksalad Heteranthera limosa Pontederiaceae Liliales
roundleaf mudplantain Heteranthera reniformis Pontederiaceae Liliales
tanglehead Heteropogon contortus Poaceae Cyperales
telegraphplant Heterotheca grandiflora Asteraceae Asterales
camphorweed Heterotheca subaxillaris Asteraceae Asterales
hairy false goldenaster Heterotheca villosa Asteraceae Asterales
Venice mallow Hibiscus trionum Malvaceae Malvales
orange hawkweed Hieracium aurantiacum Asteraceae Asterales
meadow hawkweed Hieracium caespitosum Asteraceae Asterales
gronovius hawkweed Hieracium gronovii Asteraceae Asterales
mouseear hawkweed Hieracium pilosella Asteraceae Asterales
marestail Hippuris vulgaris Hippuridaceae Callitrichales
shortpod mustard Hirschfeldia incana Brassicaceae Capparales
common velvetgrass Holcus lanatus Poaceae Cyperales
virgate tarweed Holocarpha virgata Asteraceae Asterales
oceanspray Holodiscus discolor Rosaceae Rosales
foxtail barley Hordeum jubatum Poaceae Cyperales
Mediterranean barley Hordeum marinum ssp. gussonianum Poaceae Cyperales
mouse barley Hordeum murinum Poaceae Cyperales
smooth barley Hordeum murinum ssp. glaucum Poaceae Cyperales
leporinum barley Hordeum murinum ssp. leporinum Poaceae Cyperales
wall barley Hordeum murinum ssp. murinum Poaceae Cyperales
little barley Hordeum pusillum Poaceae Cyperales
barley Hordeum vulgare Poaceae Cyperales
bluets Houstonia caerulea Rubiaceae Rubiales
roundleaf bluet Houstonia procumbens Rubiaceae Rubiales
Japanese hop Humulus japonicus Cannabaceae Urticales
hydrilla Hydrilla verticillata Hydrocharitaceae Hydrocharitales
common frogbit Hydrocharis morsus-ranae Hydrocharitaceae Hydrocharitales
coastal plain pennywort Hydrocotyle bonariensis Apiaceae Apiales
floating pennywort Hydrocotyle ranunculoides Apiaceae Apiales
lawn pennywort Hydrocotyle sibthorpioides Apiaceae Apiales
water pennywort Hydrocotyle umbellata Apiaceae Apiales
whorled pennywort Hydrocotyle verticillata Apiaceae Apiales
miramar weed Hygrophila polysperma Acanthaceae Scrophulariales
live-forever stonecrop Hylotelephium telephium Crassulaceae Rosales
orange sneezeweed Hymenoxys hoopesii Asteraceae Asterales
black henbane Hyoscyamus niger Solanaceae Solanales
jaraguagrass Hyparrhenia rufa Poaceae Cyperales
Canary Island St. Johnswort Hypericum canariense Clusiaceae Theales
golden St. Johnswort Hypericum frondosum Clusiaceae Theales
pineweed Hypericum gentianoides Clusiaceae Theales
dwarf St. Johnswort Hypericum mutilum Clusiaceae Theales
common St. Johnswort Hypericum perforatum Clusiaceae Theales
shrubby St. Johnswort Hypericum prolificum Clusiaceae Theales
spotted St. Johnswort Hypericum punctatum Clusiaceae Theales
smooth cat's ear Hypochaeris glabra Asteraceae Asterales
hairy cat's ear Hypochaeris radicata Asteraceae Asterales
comb bushmint Hyptis pectinata Lamiaceae Lamiales
yellow unicorn-plant Ibicella lutea Pedaliaceae Scrophulariales
English holly Ilex aquifolium Aquifoliaceae Celastrales
possumhaw Ilex decidua Aquifoliaceae Celastrales
yaupon Ilex vomitoria Aquifoliaceae Celastrales
jewelweed Impatiens capensis Balsaminaceae Geraniales
ornamental jewelweed Impatiens glandulifera Balsaminaceae Geraniales
Brazilian satintail Imperata brasiliensis Poaceae Cyperales
cogongrass Imperata cylindrica Poaceae Cyperales
indigo Indigofera spicata Fabaceae (Leguminosae) Fabales
British yellowhead Inula britannica Asteraceae Asterales
swamp morningglory Ipomoea aquatica Convolvulaceae Solanales
Cairo morningglory Ipomoea cairica Convolvulaceae Solanales
red morningglory Ipomoea coccinea Convolvulaceae Solanales
sharppod morningglory Ipomoea cordatotriloba Convolvulaceae Solanales
ivyleaf morningglory Ipomoea hederacea Convolvulaceae Solanales
blue morningglory Ipomoea indica Convolvulaceae Solanales
pitted morningglory Ipomoea lacunosa Convolvulaceae Solanales
Japanese morningglory Ipomoea nil Convolvulaceae Solanales
bigroot morningglory Ipomoea pandurata Convolvulaceae Solanales
beach morningglory Ipomoea pes-caprae Convolvulaceae Solanales
tall morningglory Ipomoea purpurea Convolvulaceae Solanales
cypressvine morningglory Ipomoea quamoclit Convolvulaceae Solanales
threelobe morningglory Ipomoea triloba Convolvulaceae Solanales
purple moonflower Ipomoea turbinata Convolvulaceae Solanales
palmleaf morningglory Ipomoea wrightii Convolvulaceae Solanales
Douglas iris Iris douglasiana Iridaceae Liliales
Rocky Mountain iris Iris missouriensis Iridaceae Liliales
yellowflag iris Iris pseudacorus Iridaceae Liliales
blueflag iris Iris versicolor Iridaceae Liliales
Virginia iris Iris virginica Iridaceae Liliales
Dyer's woad Isatis tinctoria Brassicaceae Capparales
saramollagrass Ischaemum rugosum Poaceae Cyperales
shrine jimmyweed Isocoma tenuisecta Asteraceae Asterales
annual marshelder Iva annua Asteraceae Asterales
poverty sumpweed Iva axillaris Asteraceae Asterales
smallflower morningglory Jacquemontia tamnifolia Convolvulaceae Solanales
bellyache bush Jatropha gossypiifolia Euphorbiaceae Euphorbiales
toad rush Juncus bufonius Juncaceae Juncales
soft rush Juncus effusus Juncaceae Juncales
slender rush Juncus tenuis Juncaceae Juncales
common juniper Juniperus communis Cupressaceae Pinales
western juniper Juniperus occidentalis var. occidentalis Cupressaceae Pinales
eastern redcedar Juniperus virginiana Cupressaceae Pinales
American waterwillow Justicia americana Acanthaceae Scrophulariales
sheep-laurel Kalmia angustifolia Ericaceae Ericales
sharppoint fluvellin Kickxia elatine Scrophulariaceae Scrophulariales
bluebuttons Knautia arvensis Dipsacaceae Dipsacales
Mexican fireweed Kochia scoparia Chenopodiaceae Caryophyllales
Korean lespedeza Kummerowia stipulacea Fabaceae (Leguminosae) Fabales
common lespedeza Kummerowia striata Fabaceae (Leguminosae) Fabales
green kyllinga Kyllinga brevifolia Cyperaceae Cyperales
false green kyllinga Kyllinga gracillima Cyperaceae Cyperales
white kyllinga Kyllinga nemoralis Cyperaceae Cyperales
fragrant kyllinga Kyllinga odorata Cyperaceae Cyperales
Carolina redroot Lachnanthes caroliana Haemodoraceae Liliales
tall lettuce Lactuca canadensis Asteraceae Asterales
Florida wild lettuce Lactuca floridana Asteraceae Asterales
willowleaf lettuce Lactuca saligna Asteraceae Asterales
prickly lettuce Lactuca serriola Asteraceae Asterales
bitter lettuce Lactuca virosa Asteraceae Asterales
Coulter's horseweed Laennecia coulteri Asteraceae Asterales
oxygen weed Lagarosiphon major Hydrocharitaceae Hydrocharitales
henbit Lamium amplexicaule Lamiaceae Lamiales
spotted deadnettle Lamium maculatum Lamiaceae Lamiales
purple deadnettle Lamium purpureum Lamiaceae Lamiales
largeleaf lantana Lantana camara Verbenaceae Lamiales
weeping lantana Lantana montevidensis Verbenaceae Lamiales
western sticktight Lappula occidentalis Boraginaceae Lamiales
European sticktight Lappula squarrosa Boraginaceae Lamiales
creosotebush Larrea tridentata Zygophyllaceae Sapindales
rough peavine Lathyrus hirsutus Fabaceae (Leguminosae) Fabales
everlasting peavine Lathyrus latifolius Fabaceae (Leguminosae) Fabales
Labrador-tea Ledum groenlandicum Ericaceae Ericales
rice cutgrass Leersia oryzoides Poaceae Cyperales
inflated duckweed Lemna gibba Lemnaceae Arales
minute duckweed Lemna minuta Lemnaceae Arales
lionsear Leonotis nepetifolia Lamiaceae Lamiales
fall hawkbit Leontodon autumnalis Asteraceae Asterales
lesser hawkbit Leontodon taraxacoides Asteraceae Asterales
motherwort Leonurus cardiaca Lamiaceae Lamiales
field pepperweed Lepidium campestre Brassicaceae Capparales
orbicular whitetop Lepidium chalepense Brassicaceae Capparales
greenflower pepperweed Lepidium densiflorum Brassicaceae Capparales
hoary cress Lepidium draba Brassicaceae Capparales
perennial pepperweed Lepidium latifolium Brassicaceae Capparales
tongue pepperweed Lepidium nitidum Brassicaceae Capparales
clasping pepperweed Lepidium perfoliatum Brassicaceae Capparales
garden cress Lepidium sativum Brassicaceae Capparales
Virginia pepperweed Lepidium virginicum Brassicaceae Capparales
Chinese sprangletop Leptochloa chinensis Poaceae Cyperales
bearded sprangletop Leptochloa fusca ssp. fascicularis Poaceae Cyperales
Mexican sprangletop Leptochloa fusca ssp. uninervia Poaceae Cyperales
sericea lespedeza Lespedeza cuneata Fabaceae (Leguminosae) Fabales
Thunberg lespedeza Lespedeza thunbergii Fabaceae (Leguminosae) Fabales
violet lespedeza Lespedeza violacea Fabaceae (Leguminosae) Fabales
oxeye daisy Leucanthemum vulgare Asteraceae Asterales
ceniza Leucophyllum frutescens Scrophulariaceae Scrophulariales
dotted gayfeather Liatris punctata Asteraceae Asterales
glossy privet Ligustrum lucidum Oleaceae Scrophulariales
tiger lily Lilium lancifolium Liliaceae Liliales
American frogbit Limnobium spongia Hydrocharitaceae Hydrocharitales
limnophila Limnophila sessiliflora Scrophulariaceae Scrophulariales
Dalmatian toadflax Linaria dalmatica Scrophulariaceae Scrophulariales
broomleaf toadflax Linaria genistifolia Scrophulariaceae Scrophulariales
Moroccan toadflax Linaria maroccana Scrophulariaceae Scrophulariales
purple toadflax Linaria purpurea Scrophulariaceae Scrophulariales
yellow toadflax Linaria vulgaris Scrophulariaceae Scrophulariales
pale flax Linum bienne Linaceae Linales
common flax Linum usitatissimum Linaceae Linales
sweetgum Liquidambar styraciflua Hamamelidaceae Hamamelidales
yellow-poplar Liriodendron tulipifera Magnoliaceae Magnoliales
tanoak Lithocarpus densiflorus Fagaceae Fagales
hoary puccoon Lithospermum canescens Boraginaceae Lamiales
cardinalflower Lobelia cardinalis Campanulaceae Campanulales
Indiantobacco Lobelia inflata Campanulaceae Campanulales
great blue lobelia Lobelia siphilitica Campanulaceae Campanulales
sweet alyssum Lobularia maritima Brassicaceae Capparales
narrowleaf cottonrose Logfia gallica Asteraceae Asterales
perennial ryegrass Lolium perenne Poaceae Cyperales
rigid ryegrass Lolium rigidum Poaceae Cyperales
poison ryegrass Lolium temulentum Poaceae Cyperales
Japanese honeysuckle Lonicera japonica Caprifoliaceae Dipsacales
trumpet honeysuckle Lonicera sempervirens Caprifoliaceae Dipsacales
Tatarian honeysuckle Lonicera tatarica Caprifoliaceae Dipsacales
Bell's honeysuckle Lonicera x bella Caprifoliaceae Dipsacales
birdsfoot trefoil Lotus corniculatus Fabaceae (Leguminosae) Fabales
narrowleaf bird's-foot trefoil Lotus tenuis Fabaceae (Leguminosae) Fabales
bushy waterprimrose Ludwigia alternifolia Onagraceae Myrtales
winged waterprimrose Ludwigia decurrens Onagraceae Myrtales
longfruited primrose-willow Ludwigia octovalvis Onagraceae Myrtales
waterpurslane Ludwigia palustris Onagraceae Myrtales
creeping waterprimrose Ludwigia peploides Onagraceae Myrtales
primrose-willow Ludwigia peruviana Onagraceae Myrtales
floating waterprimrose Ludwigia repens Onagraceae Myrtales
yellow bush lupine Lupinus arboreus Fabaceae (Leguminosae) Fabales
silver lupine Lupinus argenteus Fabaceae (Leguminosae) Fabales
miniature lupine Lupinus bicolor Fabaceae (Leguminosae) Fabales
tailcup lupine Lupinus caudatus Fabaceae (Leguminosae) Fabales
perennial lupine Lupinus perennis Fabaceae (Leguminosae) Fabales
bigleaf lupine Lupinus polyphyllus Fabaceae (Leguminosae) Fabales
silky lupine Lupinus sericeus Fabaceae (Leguminosae) Fabales
southern watergrass Luziola fluitans Poaceae Cyperales
matrimony vine Lycium barbarum Solanaceae Solanales
African boxthorn Lycium ferocissimum Solanaceae Solanales
American bugleweed Lycopus americanus Lamiaceae Lamiales
European bugleweed Lycopus europaeus Lamiaceae Lamiales
slender bugleweed Lycopus uniflorus Lamiaceae Lamiales
Japanese climbing fern Lygodium japonicum Lygodiaceae Polypodiales
old world climbing fern Lygodium microphyllum Lygodiaceae Polypodiales
scarlet pimpernel Lysimachia arvensis Primulaceae Primulales
fringed loosestrife Lysimachia ciliata Primulaceae Primulales
moneywort Lysimachia nummularia Primulaceae Primulales
dotted loosestrife Lysimachia punctata Primulaceae Primulales
swampcandle Lysimachia terrestris Primulaceae Primulales
garden loosestrife Lysimachia vulgaris Primulaceae Primulales
California loosestrife Lythrum californicum Lythraceae Myrtales
hyssop loosestrife Lythrum hyssopifolium Lythraceae Myrtales
purple loosestrife Lythrum salicaria Lythraceae Myrtales
threebract loosestrife Lythrum tribracteatum Lythraceae Myrtales
catclaw-vine Macfadyena unguis-cati Bignoniaceae Scrophulariales
lacy tansyaster Machaeranthera pinnatifida Asteraceae Asterales
tahoka daisy Machaeranthera tanacetifolia Asteraceae Asterales
osage-orange Maclura pomifera Moraceae Urticales
mountain grape Mahonia aquifolium Berberidaceae Ranunculales
Oregon grape Mahonia nervosa Berberidaceae Ranunculales
false lily-of-the-valley Maianthemum canadense Liliaceae Liliales
coppery mesemb Malephora crocea Aizoaceae Caryophyllales
musk mallow Malva moschata Malvaceae Malvales
common mallow Malva neglecta Malvaceae Malvales
bull mallow Malva nicaeensis Malvaceae Malvales
little mallow Malva parviflora Malvaceae Malvales
high mallow Malva sylvestris Malvaceae Malvales
alkali mallow Malvella leprosa Malvaceae Malvales
white horehound Marrubium vulgare Lamiaceae Lamiales
European pepperwort Marsilea quadrifolia Marsileaceae Hydropteridales
hairy pepperwort Marsilea vestita Marsileaceae Hydropteridales
pineapple-weed Matricaria discoidea Asteraceae Asterales
wild chamomile Matricaria recutita Asteraceae Asterales
Asian mazus Mazus pumilus Scrophulariaceae Scrophulariales
black medic Medicago lupulina Fabaceae (Leguminosae) Fabales
little burclover Medicago minima Fabaceae (Leguminosae) Fabales
California burclover Medicago polymorpha Fabaceae (Leguminosae) Fabales
alfalfa Medicago sativa Fabaceae (Leguminosae) Fabales
holdtight Medinilla venosa Melastomataceae Myrtales
guineagrass Megathyrsus maximus Poaceae Cyperales
melaleuca Melaleuca quinquenervia Myrtaceae Myrtales
cow-wheat Melampyrum lineare Scrophulariaceae Scrophulariales
Banks melastoma Melastoma malabathricum Melastomataceae Myrtales
chinaberry Melia azedarach Meliaceae Sapindales
annual yellow sweetclover Melilotus indicus Fabaceae (Leguminosae) Fabales
yellow sweetclover Melilotus officinalis Fabaceae (Leguminosae) Fabales
molassesgrass Melinis minutiflora Poaceae Cyperales
natalgrass Melinis repens Poaceae Cyperales
redweed Melochia corchorifolia Sterculiaceae Malvales
creeping cucumber Melothria pendula Cucurbitaceae Violales
pennyroyal Mentha pulegium Lamiaceae Lamiales
spearmint Mentha spicata Lamiaceae Lamiales
apple mint Mentha suaveolens Lamiaceae Lamiales
tenpetal stickleaf Mentzelia decapetala Loasaceae Violales
smoothstem blazingstar Mentzelia laevicaulis Loasaceae Violales
crystalline iceplant Mesembryanthemum crystallinum Aizoaceae Caryophyllales
slenderleaf iceplant Mesembryanthemum nodiflorum Aizoaceae Caryophyllales
miconia Miconia calvescens Melastomataceae Myrtales
globifera Micranthemum umbrosum Scrophulariaceae Scrophulariales
African mile-a-minute Mikania cordata Asteraceae Asterales
mile-a-minute Mikania micrantha Asteraceae Asterales
climbing hempweed Mikania scandens Asteraceae Asterales
spring millet Milium vernale Poaceae Cyperales
giant sensitiveplant Mimosa diplotricha Fabaceae (Leguminosae) Fabales
littleleaf sensitivebriar Mimosa microphylla Fabaceae (Leguminosae) Fabales
catclaw mimosa Mimosa pellita Fabaceae (Leguminosae) Fabales
sensitiveplant Mimosa pudica Fabaceae (Leguminosae) Fabales
seep monkeyflower Mimulus guttatus Scrophulariaceae Scrophulariales
common four-o'clock Mirabilis jalapa Nyctaginaceae Caryophyllales
wild four-o'clock Mirabilis nyctaginea Nyctaginaceae Caryophyllales
Chinese silvergrass Miscanthus sinensis Poaceae Cyperales
linearleaf snapdragon Misopates orontium Scrophulariaceae Scrophulariales
bristly mallow Modiola caroliniana Malvaceae Malvales
carpetweed Mollugo verticillata Molluginaceae Caryophyllales
balsamapple Momordica charantia Cucurbitaceae Violales
lemon beebalm Monarda citriodora Lamiaceae Lamiales
wild bergamot Monarda fistulosa Lamiaceae Lamiales
spotted beebalm Monarda punctata Lamiaceae Lamiales
arrowleaved monochoria Monochoria hastata Pontederiaceae Liliales
monochoria Monochoria vaginalis Pontederiaceae Liliales
Nuttall povertyweed Monolepis nuttalliana Chenopodiaceae Caryophyllales
treedaisy Montanoa hibiscifolia Asteraceae Asterales
southern waxmyrtle Morella cerifera Myricaceae Myricales
firetree Morella faya Myricaceae Myricales
bayberry Morella pensylvanica Myricaceae Myricales
white mulberry Morus alba Moraceae Urticales
red mulberry Morus rubra Moraceae Urticales
wirestem muhly Muhlenbergia frondosa Poaceae Cyperales
nimblewill Muhlenbergia schreberi Poaceae Cyperales
marsh dayflower Murdannia keisak Commelinaceae Commelinales
doveweed Murdannia nudiflora Commelinaceae Commelinales
wall lettuce Mycelis muralis Asteraceae Asterales
ngaio tree Myoporum laetum Myoporaceae Scrophulariales
broadleaf forget-me-not Myosotis latifolia Boraginaceae Lamiales
true forget-me-not Myosotis scorpioides Boraginaceae Lamiales
mousetail Myosurus minimus Ranunculaceae Ranunculales
parrot feather milfoil Myriophyllum aquaticum Haloragaceae Haloragales
twoleaf watermilfoil Myriophyllum heterophyllum Haloragaceae Haloragales
Eurasian watermilfoil Myriophyllum spicatum Haloragaceae Haloragales
slender naiad Najas flexilis Najadaceae Najadales
southern naiad Najas guadalupensis Najadaceae Najadales
hollyleaf naiad Najas marina Najadaceae Najadales
brittleleaf naiad Najas minor Najadaceae Najadales
matgrass Nardus stricta Poaceae Cyperales
serrated tussock Nassella trichotoma Poaceae Cyperales
watercress Nasturtium officinale Brassicaceae Capparales
American lotus Nelumbo lutea Nelumbonaceae Nymphaeales
catnip Nepeta cataria Lamiaceae Lamiales
oleander Nerium oleander Apocynaceae Gentianales
burmareed Neyraudia reynaudiana Poaceae Cyperales
apple-of-Peru Nicandra physalodes Solanaceae Solanales
manyflower tobacco Nicotiana acuminata var. multiflora Solanaceae Solanales
tree tobacco Nicotiana glauca Solanaceae Solanales
Indian tobacco Nicotiana quadrivalvis Solanaceae Solanales
yellow waterlily Nuphar lutea Nymphaeaceae Nymphaeales
Rocky Mountain pond-lily Nuphar lutea ssp. polysepala Nymphaeaceae Nymphaeales
Canada toadflax Nuttallanthus canadensis Scrophulariaceae Scrophulariales
Texas toadflax Nuttallanthus texanus Scrophulariaceae Scrophulariales
Mexican waterlily Nymphaea mexicana Nymphaeaceae Nymphaeales
fragrant waterlily Nymphaea odorata Nymphaeaceae Nymphaeales
big floatingheart Nymphoides aquatica Menyanthaceae Solanales
yellow floatingheart Nymphoides peltata Menyanthaceae Solanales
blackgum Nyssa sylvatica Nyssaceae Cornales
prairie evening-primrose Oenothera albicaulis Onagraceae Myrtales
common evening-primrose Oenothera biennis Onagraceae Myrtales
cutleaf evening-primrose Oenothera laciniata Onagraceae Myrtales
showy evening-primrose Oenothera speciosa Onagraceae Myrtales
old world diamond-flower Oldenlandia corymbosa Rubiaceae Rubiales
olive Olea europaea Oleaceae Scrophulariales
sensitive fern Onoclea sensibilis Dryopteridaceae Polypodiales
Scotch thistle Onopordum acanthium Asteraceae Asterales
Illyrian cottonthistle Onopordum illyricum Asteraceae Asterales
bull cottonthistle Onopordum tauricum Asteraceae Asterales
jointed prickly pear Opuntia aurantiaca Cactaceae Caryophyllales
Texas pricklypear Opuntia engelmannii var. lindheimeri Cactaceae Caryophyllales
brittle pricklypear Opuntia fragilis Cactaceae Caryophyllales
spreading pricklypear Opuntia humifusa Cactaceae Caryophyllales
walkingstick cholla Opuntia imbricata Cactaceae Caryophyllales
plains pricklypear Opuntia polyacantha Cactaceae Caryophyllales
wild marjoram Origanum vulgare Lamiaceae Lamiales
star-of-Bethlehem Ornithogalum umbellatum Liliaceae Liliales
nodding broomrape Orobanche cernua Orobanchaceae Scrophulariales
desert broomrape Orobanche cooperi Orobanchaceae Scrophulariales
crenate broomrape Orobanche crenata Orobanchaceae Scrophulariales
small broomrape Orobanche minor Orobanchaceae Scrophulariales
branched broomrape Orobanche ramosa Orobanchaceae Scrophulariales
goldenclub Orontium aquaticum Araceae Arales
longstamen rice Oryza longistaminata Poaceae Cyperales
red rice Oryza punctata Poaceae Cyperales
brown-beard rice Oryza rufipogon Poaceae Cyperales
rice Oryza sativa Poaceae Cyperales
cinnamon fern Osmunda cinnamomea Osmundaceae Polypodiales
blue and white daisybush Osteospermum ecklonis Asteraceae Asterales
duck-lettuce Ottelia alismoides Hydrocharitaceae Hydrocharitales
creeping woodsorrel Oxalis corniculata Oxalidaceae Geraniales
buttercup oxalis Oxalis pes-caprae Oxalidaceae Geraniales
windowbox woodsorrel Oxalis rubra Oxalidaceae Geraniales
yellow woodsorrel Oxalis stricta Oxalidaceae Geraniales
violet woodsorrel Oxalis violacea Oxalidaceae Geraniales
Cuban bulrush Oxycaryum cubense Cyperaceae Cyperales
Lambert crazyweed Oxytropis lambertii Fabaceae (Leguminosae) Fabales
white locoweed Oxytropis sericea Fabaceae (Leguminosae) Fabales
showy crazyweed Oxytropis splendens Fabaceae (Leguminosae) Fabales
golden ragwort Packera aurea Asteraceae Asterales
cressleaf groundsel Packera glabella Asteraceae Asterales
balsam groundsel Packera paupercula Asteraceae Asterales
skunk-vine Paederia foetida Rubiaceae Rubiales
blue panicum Panicum antidotale Poaceae Cyperales
witchgrass Panicum capillare Poaceae Cyperales
fall panicum Panicum dichotomiflorum Poaceae Cyperales
maidencane Panicum hemitomon Poaceae Cyperales
wild-proso millet Panicum miliaceum Poaceae Cyperales
torpedograss Panicum repens Poaceae Cyperales
switchgrass Panicum virgatum Poaceae Cyperales
field poppy Papaver dubium Papaveraceae Papaverales
corn poppy Papaver rhoeas Papaveraceae Papaverales
opium poppy Papaver somniferum Papaveraceae Papaverales
broadleaf glandweed Parentucellia latifolia Scrophulariaceae Scrophulariales
yellow glandweed Parentucellia viscosa Scrophulariaceae Scrophulariales
Mexican palo-verde Parkinsonia aculeata Fabaceae (Leguminosae) Fabales
ragweed parthenium Parthenium hysterophorus Asteraceae Asterales
Virginia-creeper Parthenocissus quinquefolia Vitaceae Rhamnales
western wheatgrass Pascopyrum smithii Poaceae Cyperales
dallisgrass Paspalum dilatatum Poaceae Cyperales
knotgrass Paspalum distichum Poaceae Cyperales
Florida paspalum Paspalum floridanum Poaceae Cyperales
field paspalum Paspalum laeve Poaceae Cyperales
bahiagrass Paspalum notatum Poaceae Cyperales
ricegrass paspalum Paspalum scrobiculatum Poaceae Cyperales
thin paspalum Paspalum setaceum Poaceae Cyperales
vaseygrass Paspalum urvillei Poaceae Cyperales
seashore paspalum Paspalum vaginatum Poaceae Cyperales
redfruit passionflower Passiflora foetida Passifloraceae Violales
maypop passionflower Passiflora incarnata Passifloraceae Violales
yellow passionflower Passiflora lutea Passifloraceae Violales
corkystemmed passionflower Passiflora suberosa Passifloraceae Violales
wild parsnip Pastinaca sativa Apiaceae Apiales
princesstree Paulownia tomentosa Scrophulariaceae Scrophulariales
African rue Peganum harmala Zygophyllaceae Sapindales
arrow-arum Peltandra virginica Araceae Arales
buffelgrass Pennisetum ciliare Poaceae Cyperales
kikuyugrass Pennisetum clandestinum Poaceae Cyperales
pearl millet Pennisetum glaucum Poaceae Cyperales
African feathergrass Pennisetum macrourum Poaceae Cyperales
kyasumagrass Pennisetum pedicellatum Poaceae Cyperales
mission grass Pennisetum polystachion Poaceae Cyperales
elephant grass Pennisetum purpureum Poaceae Cyperales
crimson fountaingrass Pennisetum setaceum Poaceae Cyperales
feathertop Pennisetum villosum Poaceae Cyperales
Eaton penstemon Penstemon eatonii Scrophulariaceae Scrophulariales
perilla mint Perilla frutescens Lamiaceae Lamiales
swamp smartweed Persicaria hydropiperoides Polygonaceae Polygonales
pale smartweed Persicaria lapathifolia Polygonaceae Polygonales
ladysthumb Persicaria maculosa Polygonaceae Polygonales
dotted smartweed Persicaria punctata Polygonaceae Polygonales
cultivated knotweed Persicaria wallichii Polygonaceae Polygonales
hairypink Petrorhagia dubia Caryophyllaceae Caryophyllales
Miami mist Phacelia purshii Hydrophyllaceae Solanales
bulbous canarygrass Phalaris aquatica Poaceae Cyperales
reed canarygrass Phalaris arundinacea Poaceae Cyperales
canarygrass Phalaris canariensis Poaceae Cyperales
littleseed canarygrass Phalaris minor Poaceae Cyperales
hood canarygrass Phalaris paradoxa Poaceae Cyperales
timothy Phleum pratense Poaceae Cyperales
Canary Island date palm Phoenix canariensis Arecaceae Arecales
Pacific mistletoe Phoradendron villosum Viscaceae Santalales
common reed Phragmites australis Poaceae Cyperales
northern fogfruit Phyla lanceolata Verbenaceae Lamiales
mat lippia Phyla nodiflora Verbenaceae Lamiales
niruri Phyllanthus niruri Euphorbiaceae Euphorbiales
chamber bitter Phyllanthus urinaria Euphorbiaceae Euphorbiales
sharpleaf groundcherry Physalis acutifolia Solanaceae Solanales
strawberry groundcherry Physalis alkekengi Solanaceae Solanales
cutleaf groundcherry Physalis angulata Solanaceae Solanales
clammy groundcherry Physalis heterophylla Solanaceae Solanales
smooth groundcherry Physalis longifolia var. subglabrata Solanaceae Solanales
tomatillo groundcherry Physalis philadelphica Solanaceae Solanales
Virginia groundcherry Physalis virginiana Solanaceae Solanales
common pokeweed Phytolacca americana Phytolaccaceae Caryophyllales
white spruce Picea glauca Pinaceae Pinales
hawkweed oxtongue Picris hieracioides Asteraceae Asterales
artilleryweed Pilea microphylla Urticaceae Urticales
clearweed Pilea pumila Urticaceae Urticales
Monterey pine Pinus radiata Pinaceae Pinales
smilograss Piptatherum miliaceum Poaceae Cyperales
waterlettuce Pistia stratiotes Araceae Arales
Australian cheesewood Pittosporum undulatum Pittosporaceae Rosales
silk-grass Pityopsis graminifolia Asteraceae Asterales
bracted plantain Plantago aristata Plantaginaceae Plantaginales
buckhorn plantain Plantago coronopus Plantaginaceae Plantaginales
buckhorn plantain Plantago lanceolata Plantaginaceae Plantaginales
broadleaf plantain Plantago major Plantaginaceae Plantaginales
woolly plantain Plantago patagonica Plantaginaceae Plantaginales
blackseed plantain Plantago rugelii Plantaginaceae Plantaginales
paleseed plantain Plantago virginica Plantaginaceae Plantaginales
stinkweed Pluchea camphorata Asteraceae Asterales
annual bluegrass Poa annua Poaceae Cyperales
bulbous bluegrass Poa bulbosa Poaceae Cyperales
Canada bluegrass Poa compressa Poaceae Cyperales
wood bluegrass Poa nemoralis Poaceae Cyperales
Kentucky bluegrass Poa pratensis Poaceae Cyperales
roughstalk bluegrass Poa trivialis Poaceae Cyperales
roughseed clammyweed Polanisia dodecandra Capparaceae Capparales
blue Jacob's-ladder Polemonium caeruleum Polemoniaceae Solanales
fourleaf manyseed Polycarpon tetraphyllum Caryophyllaceae Caryophyllales
smooth Solomon's seal Polygonatum biflorum Liliaceae Liliales
longroot smartweed Polygonum amphibium var. emersum Polygonaceae Polygonales
water smartweed Polygonum amphibium var. stipulaceum Polygonaceae Polygonales
oval-leaf knotweed Polygonum arenastrum Polygonaceae Polygonales
silversheath knotweed Polygonum argyrocoleon Polygonaceae Polygonales
prostrate knotweed Polygonum aviculare Polygonaceae Polygonales
blackfringe knotweed Polygonum cilinode Polygonaceae Polygonales
marshpepper smartweed Polygonum hydropiper Polygonaceae Polygonales
Pennsylvania smartweed Polygonum pensylvanicum Polygonaceae Polygonales
hedge smartweed Polygonum scandens Polygonaceae Polygonales
ditch polypogon Polypogon interruptus Poaceae Cyperales
rabbitfoot polypogon Polypogon monspeliensis Poaceae Cyperales
water-bent Polypogon viridis Poaceae Cyperales
rustweed Polypremum procumbens Buddlejaceae Scrophulariales
western swordfern Polystichum munitum Dryopteridaceae Polypodiales
pickerelweed Pontederia cordata Pontederiaceae Liliales
white poplar Populus alba Salicaceae Salicales
balsam poplar Populus balsamifera Salicaceae Salicales
eastern cottonwood Populus deltoides Salicaceae Salicales
quaking aspen Populus tremuloides Salicaceae Salicales
common purslane Portulaca oleracea Portulacaceae Caryophyllales
pink purslane Portulaca pilosa Portulacaceae Caryophyllales
curlyleaf pondweed Potamogeton crispus Potamogetonaceae Najadales
waterthread pondweed Potamogeton diversifolius Potamogetonaceae Najadales
American pondweed Potamogeton nodosus Potamogetonaceae Najadales
white cinquefoil Potentilla arguta Rosaceae Rosales
dwarf cinquefoil Potentilla canadensis Rosaceae Rosales
slender cinquefoil Potentilla gracilis Rosaceae Rosales
rough cinquefoil Potentilla norvegica Rosaceae Rosales
sulfur cinquefoil Potentilla recta Rosaceae Rosales
oldfield cinquefoil Potentilla simplex Rosaceae Rosales
devil's-claw Proboscidea louisianica Pedaliaceae Scrophulariales
Syrian mesquite Prosopis farcta Fabaceae (Leguminosae) Fabales
mesquite Prosopis juliflora Fabaceae (Leguminosae) Fabales
kiawe Prosopis pallida Fabaceae (Leguminosae) Fabales
tornillo Prosopis reptans Fabaceae (Leguminosae) Fabales
Argentine screwbean Prosopis strombulifera Fabaceae (Leguminosae) Fabales
velvet mesquite Prosopis velutina Fabaceae (Leguminosae) Fabales
healall Prunella vulgaris Lamiaceae Lamiales
American plum Prunus americana Rosaceae Rosales
Chickasaw plum Prunus angustifolia Rosaceae Rosales
sweet cherry Prunus avium Rosaceae Rosales
sour cherry Prunus cerasus Rosaceae Rosales
garden plum Prunus domestica Rosaceae Rosales
bitter cherry Prunus emarginata Rosaceae Rosales
Mahaleb cherry Prunus mahaleb Rosaceae Rosales
pin cherry Prunus pensylvanica Rosaceae Rosales
peach Prunus persica Rosaceae Rosales
black cherry Prunus serotina Rosaceae Rosales
common chokecherry Prunus virginiana Rosaceae Rosales
Jersey cudweed Pseudognaphalium luteoalbum Asteraceae Asterales
cottonbatting plant Pseudognaphalium stramineum Asteraceae Asterales
hoptree Ptelea trifoliata Rutaceae Sapindales
brackenfern Pteridium aquilinum Dennstaedtiaceae Polypodiales
hairy brackenfern Pteridium aquilinum var. pubescens Dennstaedtiaceae Polypodiales
kudzu Pueraria montana var. lobata Fabaceae (Leguminosae) Fabales
narrowleaf firethorn Pyracantha angustifolia Rosaceae Rosales
Carolina falsedandelion Pyrrhopappus carolinianus Asteraceae Asterales
white oak Quercus alba Fagaceae Fagales
southern red oak Quercus falcata Fagaceae Fagales
Texas live oak Quercus fusiformis Fagaceae Fagales
Gambel oak Quercus gambelii Fagaceae Fagales
scrub live oak Quercus geminata Fagaceae Fagales
bluejack oak Quercus incana Fagaceae Fagales
California black oak Quercus kelloggii Fagaceae Fagales
turkey oak Quercus laevis Fagaceae Fagales
laurel oak Quercus laurifolia Fagaceae Fagales
bur oak Quercus macrocarpa Fagaceae Fagales
blackjack oak Quercus marilandica Fagaceae Fagales
myrtle oak Quercus myrtifolia Fagaceae Fagales
water oak Quercus nigra Fagaceae Fagales
pin oak Quercus palustris Fagaceae Fagales
willow oak Quercus phellos Fagaceae Fagales
running oak Quercus pumila Fagaceae Fagales
post oak Quercus stellata Fagaceae Fagales
turbinella oak Quercus turbinella Fagaceae Fagales
live oak Quercus virginiana Fagaceae Fagales
purple groundcherry Quincula lobata Solanaceae Solanales
smallflower buttercup Ranunculus abortivus Ranunculaceae Ranunculales
tall buttercup Ranunculus acris Ranunculaceae Ranunculales
corn buttercup Ranunculus arvensis Ranunculaceae Ranunculales
spinyfruit buttercup Ranunculus muricatus Ranunculaceae Ranunculales
creeping buttercup Ranunculus repens Ranunculaceae Ranunculales
hairy buttercup Ranunculus sardous Ranunculaceae Ranunculales
wild radish Raphanus raphanistrum Brassicaceae Capparales
radish Raphanus sativus Brassicaceae Capparales
turnipweed Rapistrum rugosum Brassicaceae Capparales
upright prairie coneflower Ratibida columnifera Asteraceae Asterales
pinnate prairie coneflower Ratibida pinnata Asteraceae Asterales
yellow mignonette Reseda lutea Resedaceae Capparales
European buckthorn Rhamnus cathartica Rhamnaceae Rhamnales
Russian knapweed Rhaponticum repens Asteraceae Asterales
red mangrove Rhizophora mangle Rhizophoraceae Rhizophorales
rhodora Rhododendron canadense Ericaceae Ericales
rose myrtle Rhodomyrtus tomentosa Myrtaceae Myrtales
dwarf sumac Rhus copallinum Anacardiaceae Sapindales
smooth sumac Rhus glabra Anacardiaceae Sapindales
staghorn sumac Rhus hirta Anacardiaceae Sapindales
whitetop sedge Rhynchospora colorata Cyperaceae Cyperales
giant whitetop sedge Rhynchospora latifolia Cyperaceae Cyperales
golden currant Ribes aureum Grossulariaceae Rosales
wax currant Ribes cereum Grossulariaceae Rosales
pasture gooseberry Ribes cynosbati Grossulariaceae Rosales
whitestem gooseberry Ribes inerme Grossulariaceae Rosales
sticky currant Ribes viscosissimum Grossulariaceae Rosales
Florida pusley Richardia scabra Rubiaceae Rubiales
castorbean Ricinus communis Euphorbiaceae Euphorbiales
ravennagrass Ripidium ravennae Poaceae Cyperales
bloodberry Rivina humilis Phytolaccaceae Caryophyllales
black locust Robinia pseudoacacia Fabaceae (Leguminosae) Fabales
great yellowcress Rorippa amphibia Brassicaceae Capparales
Austrian fieldcress Rorippa austriaca Brassicaceae Capparales
curvepod yellowcress Rorippa curvisiliqua Brassicaceae Capparales
marsh yellowcress Rorippa palustris Brassicaceae Capparales
yellow fieldcress Rorippa sylvestris Brassicaceae Capparales
prickly rose Rosa acicularis Rosaceae Rosales
Macartney rose Rosa bracteata Rosaceae Rosales
dog rose Rosa canina Rosaceae Rosales
sweetbriar rose Rosa eglanteria Rosaceae Rosales
Cherokee rose Rosa laevigata Rosaceae Rosales
multiflora rose Rosa multiflora Rosaceae Rosales
Seaside rose Rosa rugosa Rosaceae Rosales
Scottish rose Rosa spinosissima Rosaceae Rosales
Woods' rose Rosa woodsii Rosaceae Rosales
Mediterranean hairgrass Rostraria cristata Poaceae Cyperales
itchgrass Rottboellia cochinchinensis Poaceae Cyperales
Allegheny blackberry Rubus allegheniensis Rosaceae Rosales
highbush blackberry Rubus argutus Rosaceae Rosales
Himalaya blackberry Rubus armeniacus Rosaceae Rosales
sand blackberry Rubus cuneifolius Rosaceae Rosales
northern dewberry Rubus flagellaris Rosaceae Rosales
European blackberry Rubus fruticosus Rosaceae Rosales
bristly dewberry Rubus hispidus Rosaceae Rosales
European red raspberry Rubus idaeus Rosaceae Rosales
cutleaf blackberry Rubus laciniatus Rosaceae Rosales
whitebark raspberry Rubus leucodermis Rosaceae Rosales
Molucca raspberry Rubus moluccanus Rosaceae Rosales
western thimbleberry Rubus parviflorus Rosaceae Rosales
Pennsylvania blackberry Rubus pensilvanicus Rosaceae Rosales
cane fruit (blackberry, raspberry) Rubus spp. Rosaceae Rosales
southern dewberry Rubus trivialis Rosaceae Rosales
California blackberry Rubus ursinus Rosaceae Rosales
black-eyed susan Rudbeckia hirta Asteraceae Asterales
cutleaf coneflower Rudbeckia laciniata Asteraceae Asterales
wild petunia Ruellia caroliniensis Acanthaceae Scrophulariales
red sorrel Rumex acetosella Polygonaceae Polygonales
cluster dock Rumex conglomeratus Polygonaceae Polygonales
curly dock Rumex crispus Polygonaceae Polygonales
toothed dock Rumex dentatus Polygonaceae Polygonales
heartwing sorrel Rumex hastatulus Polygonaceae Polygonales
Kerner's dock Rumex kerneri Polygonaceae Polygonales
broadleaf dock Rumex obtusifolius Polygonaceae Polygonales
fiddleleaf dock Rumex pulcher Polygonaceae Polygonales
veiny dock Rumex venosus Polygonaceae Polygonales
silver plumegrass Saccharum alopecuroidum Poaceae Cyperales
giant plumegrass Saccharum giganteum Poaceae Cyperales
wild sugarcane Saccharum spontaneum Poaceae Cyperales
annual pearlwort Sagina apetala Caryophyllaceae Caryophyllales
birdseye pearlwort Sagina procumbens Caryophyllaceae Caryophyllales
wedgeleaf arrowhead Sagittaria cuneata Alismataceae Alismatales
grassy arrowhead Sagittaria graminea Alismataceae Alismatales
lanceleaf arrowhead Sagittaria lancifolia Alismataceae Alismatales
common arrowhead Sagittaria latifolia Alismataceae Alismatales
Gregg arrowhead Sagittaria longiloba Alismataceae Alismatales
California arrowhead Sagittaria montevidensis Alismataceae Alismatales
arrowhead Sagittaria sagittifolia Alismataceae Alismatales
awl-leaf arrowhead Sagittaria subulata Alismataceae Alismatales
white willow Salix alba Salicaceae Salicales
goat willow Salix caprea Salicaceae Salicales
coastal plain willow Salix caroliniana Salicaceae Salicales
coyote willow Salix exigua Salicaceae Salicales
crack willow Salix fragilis Salicaceae Salicales
Goodding's willow Salix gooddingii Salicaceae Salicales
sandbar willow Salix interior Salicaceae Salicales
red willow Salix laevigata Salicaceae Salicales
arroyo willow Salix lasiolepis Salicaceae Salicales
black willow Salix nigra Salicaceae Salicales
osier Salix viminalis Salicaceae Salicales
slender Russian thistle Salsola collina Chenopodiaceae Caryophyllales
Russian thistle Salsola kali Chenopodiaceae Caryophyllales
barbwire Russian-thistle Salsola paulsenii Chenopodiaceae Caryophyllales
oppositeleaf Russian thistle Salsola soda Chenopodiaceae Caryophyllales
Russian-thistle Salsola tragus Chenopodiaceae Caryophyllales
Mediterranean saltwort Salsola vermiculata Chenopodiaceae Caryophyllales
Mediterranean sage Salvia aethiopis Lamiaceae Lamiales
lyreleaf sage Salvia lyrata Lamiaceae Lamiales
lanceleaf sage Salvia reflexa Lamiaceae Lamiales
Europe sage Salvia sclarea Lamiaceae Lamiales
whorled sage Salvia verticillata Lamiaceae Lamiales
eared salvinia Salvinia auriculata Salviniaceae Hydropteridales
water fern Salvinia minima Salviniaceae Hydropteridales
giant salvinia Salvinia molesta Salviniaceae Hydropteridales
common elderberry Sambucus nigra ssp. canadensis Caprifoliaceae Dipsacales
soapberry Sapindus saponaria Sapindaceae Sapindales
bouncingbet Saponaria officinalis Caryophyllaceae Caryophyllales
greasewood Sarcobatus vermiculatus Chenopodiaceae Caryophyllales
sassafras Sassafras albidum Lauraceae Laurales
lizardstail Saururus cernuus Saururaceae Piperales
venus-comb Scandix pecten-veneris Apiaceae Apiales
Peruvian peppertree Schinus molle Anacardiaceae Sapindales
Brazilian peppertree Schinus terebinthifolius Anacardiaceae Sapindales
Arabian schismus Schismus arabicus Poaceae Cyperales
common mediterraneangrass Schismus barbatus Poaceae Cyperales
little bluestem Schizachyrium scoparium Poaceae Cyperales
softstem bulrush Schoenoplectus tabernaemontani Cyperaceae Cyperales
hardgrass Sclerochloa dura Poaceae Cyperales
licorice weed Scoparia dulcis Scrophulariaceae Scrophulariales
lanceleaf figwort Scrophularia lanceolata Scrophulariaceae Scrophulariales
marsh skullcap Scutellaria galericulata Lamiaceae Lamiales
cereal rye Secale cereale Poaceae Cyperales
crownvetch Securigera varia Fabaceae (Leguminosae) Fabales
mossy stonecrop Sedum acre Crassulaceae Rosales
two-row stonecrop Sedum spurium Crassulaceae Rosales
marsh fleabane Senecio congestus Asteraceae Asterales
redpurple ragwort Senecio elegans Asteraceae Asterales
tansy ragwort Senecio jacobaea Asteraceae Asterales
Madagascar ragwort Senecio madagascariensis Asteraceae Asterales
woodland groundsel Senecio sylvaticus Asteraceae Asterales
common groundsel Senecio vulgaris Asteraceae Asterales
wild senna Senna marilandica Fabaceae (Leguminosae) Fabales
sicklepod Senna obtusifolia Fabaceae (Leguminosae) Fabales
coffee senna Senna occidentalis Fabaceae (Leguminosae) Fabales
saw palmetto Serenoa repens Arecaceae Arecales
Drummond rattlebush Sesbania drummondii Fabaceae (Leguminosae) Fabales
hemp sesbania Sesbania exaltata Fabaceae (Leguminosae) Fabales
bigpod sesbania Sesbania herbacea Fabaceae (Leguminosae) Fabales
red sesbania Sesbania punicea Fabaceae (Leguminosae) Fabales
bagpod Sesbania vesicaria Fabaceae (Leguminosae) Fabales
giant foxtail Setaria faberi Poaceae Cyperales
foxtail millet Setaria italica Poaceae Cyperales
palmgrass Setaria palmifolia Poaceae Cyperales
knotroot foxtail Setaria parviflora Poaceae Cyperales
yellow foxtail Setaria pumila Poaceae Cyperales
bristly foxtail Setaria verticillata Poaceae Cyperales
green foxtail Setaria viridis Poaceae Cyperales
russet buffaloberry Shepherdia canadensis Elaeagnaceae Rhamnales
field madder Sherardia arvensis Rubiaceae Rubiales
sibara Sibara virginica Brassicaceae Capparales
three-toothed cinquefoil Sibbaldiopsis tridentata Rosaceae Rosales
burcucumber Sicyos angulatus Cucurbitaceae Violales
southern sida Sida acuta Malvaceae Malvales
arrowleaf sida Sida rhombifolia Malvaceae Malvales
prickly sida Sida spinosa Malvaceae Malvales
hairy catchfly Silene dichotoma Caryophyllaceae Caryophyllales
red campion Silene dioica Caryophyllaceae Caryophyllales
meadow campion Silene flos-cuculi Caryophyllaceae Caryophyllales
English catchfly Silene gallica Caryophyllaceae Caryophyllales
nightflowering catchfly Silene noctiflora Caryophyllaceae Caryophyllales
bladder campion Silene vulgaris Caryophyllaceae Caryophyllales
wholeleaf rosinweed Silphium integrifolium Asteraceae Asterales
compassplant Silphium laciniatum Asteraceae Asterales
cup rosinweed Silphium perfoliatum Asteraceae Asterales
blessed milkthistle Silybum marianum Asteraceae Asterales
white mustard Sinapis alba Brassicaceae Capparales
wild mustard Sinapis arvensis Brassicaceae Capparales
tumble mustard Sisymbrium altissimum Brassicaceae Capparales
Mediterranean rocket Sisymbrium erysimoides Brassicaceae Capparales
London rocket Sisymbrium irio Brassicaceae Capparales
tall hedge mustard Sisymbrium loeselii Brassicaceae Capparales
hedge mustard Sisymbrium officinale Brassicaceae Capparales
oriental mustard Sisymbrium orientale Brassicaceae Capparales
narrowleaf blueeyed-grass Sisyrinchium angustifolium Iridaceae Liliales
waterparsnip Sium suave Apiaceae Apiales
wild bamboovine Smilax auriculata Smilacaceae Liliales
catbriar Smilax bona-nox Smilacaceae Liliales
cat sawbriar Smilax glauca Smilacaceae Liliales
bamboovine Smilax laurifolia Smilacaceae Liliales
sarsaparillavine Smilax pumila Smilacaceae Liliales
roundleaf greenbriar Smilax rotundifolia Smilacaceae Liliales
lanceleaf greenbriar Smilax smallii Smilacaceae Liliales
American black nightshade Solanum americanum Solanaceae Solanales
fuzzyfruit nightshade Solanum candidum Solanaceae Solanales
red soda apple Solanum capsicoides Solanaceae Solanales
horsenettle Solanum carolinense Solanaceae Solanales
robust horsenettle Solanum dimidiatum Solanaceae Solanales
twoleaf nightshade Solanum diphyllum Solanaceae Solanales
bittersweet nightshade Solanum dulcamara Solanaceae Solanales
silverleaf nightshade Solanum elaeagnifolium Solanaceae Solanales
Jamaican nightshade Solanum jamaicense Solanaceae Solanales
orangeberry nightshade Solanum lanceolatum Solanaceae Solanales
nipplefruit Solanum mammosum Solanaceae Solanales
earleaf nightshade Solanum mauritianum Solanaceae Solanales
black nightshade Solanum nigrum Solanaceae Solanales
hairy nightshade Solanum physalifolium Solanaceae Solanales
Jerusalem-cherry Solanum pseudocapsicum Solanaceae Solanales
West Indian nightshade Solanum ptycanthum Solanaceae Solanales
buffalobur Solanum rostratum Solanaceae Solanales
sticky nightshade Solanum sisymbriifolium Solanaceae Solanales
wetland nightshade Solanum tampicense Solanaceae Solanales
turkeyberry Solanum torvum Solanaceae Solanales
cutleaf nightshade Solanum triflorum Solanaceae Solanales
tropical soda apple Solanum viarum Solanaceae Solanales
purple nightshade Solanum xanti Solanaceae Solanales
Canada goldenrod Solidago canadensis Asteraceae Asterales
Canada goldenrod Solidago canadensis var. scabra Asteraceae Asterales
giant goldenrod Solidago gigantea Asteraceae Asterales
Missouri goldenrod Solidago missouriensis Asteraceae Asterales
gray goldenrod Solidago nemoralis Asteraceae Asterales
rough goldenrod Solidago rugosa Asteraceae Asterales
lawn burweed Soliva sessilis Asteraceae Asterales
perennial sowthistle Sonchus arvensis Asteraceae Asterales
moist sowthistle Sonchus arvensis ssp. uliginosus Asteraceae Asterales
spiny sowthistle Sonchus asper Asteraceae Asterales
annual sowthistle Sonchus oleraceus Asteraceae Asterales
silky sophora Sophora nuttalliana Fabaceae (Leguminosae) Fabales
European mountain-ash Sorbus aucuparia Rosaceae Rosales
yellow Indiangrass Sorghastrum nutans Poaceae Cyperales
sorghum-almum Sorghum almum Poaceae Cyperales
sorghum Sorghum bicolor Poaceae Cyperales
sudangrass Sorghum bicolor ssp. drummondii Poaceae Cyperales
johnsongrass Sorghum halepense Poaceae Cyperales
branched burreed Sparganium erectum Sparganiaceae Typhales
giant burreed Sparganium eurycarpum Sparganiaceae Typhales
smooth cordgrass Spartina alterniflora Poaceae Cyperales
common cordgrass Spartina anglica Poaceae Cyperales
denseflower cordgrass Spartina densiflora Poaceae Cyperales
saltmeadow cordgrass Spartina patens Poaceae Cyperales
Spanish broom Spartium junceum Fabaceae (Leguminosae) Fabales
corn spurry Spergula arvensis Caryophyllaceae Caryophyllales
Boccone's sandspurry Spergularia bocconii Caryophyllaceae Caryophyllales
red sandspurry Spergularia rubra Caryophyllaceae Caryophyllales
saltmarsh sandspurry Spergularia salina Caryophyllaceae Caryophyllales
broadleaf buttonweed Spermacoce alata Rubiaceae Rubiales
scarlet globemallow Sphaeralcea coccinea Malvaceae Malvales
swainsonpea Sphaerophysa salsula Fabaceae (Leguminosae) Fabales
Bay Biscayne creeping-oxeye Sphagneticola trilobata Asteraceae Asterales
gooseweed Sphenoclea zeylanica Sphenocleaceae Campanulales
hardhack Spiraea tomentosa Rosaceae Rosales
common duckmeat Spirodela polyrrhiza Lemnaceae Arales
alkali sacaton Sporobolus airoides Poaceae Cyperales
smutgrass Sporobolus indicus Poaceae Cyperales
pineywoods dropseed Sporobolus junceus Poaceae Cyperales
seashore dropseed Sporobolus virginicus Poaceae Cyperales
Florida betony Stachys floridana Lamiaceae Lamiales
Jamaica vervain Stachytarpheta jamaicensis Verbenaceae Lamiales
Easterbell starwort Stellaria holostea Caryophyllaceae Caryophyllales
Alaska chickweed Stellaria longipes Caryophyllaceae Caryophyllales
common chickweed Stellaria media Caryophyllaceae Caryophyllales
common chickweed Stellaria pallida Caryophyllaceae Caryophyllales
star chickweed Stellaria pubera Caryophyllaceae Caryophyllales
St. Augustinegrass Stenotaphrum secundatum Poaceae Cyperales
whiteplume wirelettuce Stephanomeria exigua ssp. coronaria Asteraceae Asterales
witchweed Striga asiatica Scrophulariaceae Scrophulariales
cowpea witchweed Striga gesnerioides Scrophulariaceae Scrophulariales
amberique-bean Strophostyles helvola Fabaceae (Leguminosae) Fabales
western seepweed Suaeda calceoliformis Chenopodiaceae Caryophyllales
common snowberry Symphoricarpos albus Caprifoliaceae Dipsacales
western snowberry Symphoricarpos occidentalis Caprifoliaceae Dipsacales
coralberry Symphoricarpos orbiculatus Caprifoliaceae Dipsacales
slender aster Symphyotrichum divaricatum Asteraceae Asterales
white panicle aster Symphyotrichum lanceolatum Asteraceae Asterales
New England aster Symphyotrichum novae-angliae Asteraceae Asterales
common comfrey Symphytum officinale Boraginaceae Lamiales
skunkcabbage Symplocarpus foetidus Araceae Arales
medusahead Taeniatherum caput-medusae Poaceae Cyperales
wild marigold Tagetes minuta Asteraceae Asterales
Athel tamarisk Tamarix aphylla Tamaricaceae Violales
fivestamen tamarisk Tamarix chinensis Tamaricaceae Violales
French tamarisk Tamarix gallica Tamaricaceae Violales
smallflower tamarisk Tamarix parviflora Tamaricaceae Violales
saltcedar Tamarix ramosissima Tamaricaceae Violales
feverfew Tanacetum parthenium Asteraceae Asterales
common tansy Tanacetum vulgare Asteraceae Asterales
dandelion Taraxacum officinale Asteraceae Asterales
trumpetflower Tecoma stans Bignoniaceae Scrophulariales
spineless horsebrush Tetradymia canescens Asteraceae Asterales
New Zealand spinach Tetragonia tetragonioides Aizoaceae Caryophyllales
American germander Teucrium canadense Lamiaceae Lamiales
tall meadow-rue Thalictrum pubescens Ranunculaceae Ranunculales
stiff greenthread Thelesperma filifolium Asteraceae Asterales
mountain goldenbanner Thermopsis montana Fabaceae (Leguminosae) Fabales
prairie thermopsis Thermopsis rhombifolia Fabaceae (Leguminosae) Fabales
tall wheatgrass Thinopyrum ponticum Poaceae Cyperales
field pennycress Thlaspi arvense Brassicaceae Capparales
creeping thyme Thymus praecox ssp. arcticus Lamiaceae Lamiales
princess-flower Tibouchina urvilleana Melastomataceae Myrtales
hedgeparsley Torilis arvensis Apiaceae Apiales
Japanese hedgeparsley Torilis japonica Apiaceae Apiales
knotted hedgeparsley Torilis nodosa Apiaceae Apiales
Pacific poison-oak Toxicodendron diversilobum Anacardiaceae Sapindales
Atlantic poison-oak Toxicodendron pubescens Anacardiaceae Sapindales
eastern poison-ivy Toxicodendron radicans Anacardiaceae Sapindales
western poison ivy Toxicodendron rydbergii Anacardiaceae Sapindales
poison-sumac Toxicodendron vernix Anacardiaceae Sapindales
climbing dogbane Trachelospermum difforme Apocynaceae Gentianales
white-flowered spiderwort Tradescantia fluminensis Commelinaceae Commelinales
common spiderwort Tradescantia ohiensis Commelinaceae Commelinales
western salsify Tragopogon dubius Asteraceae Asterales
meadow salsify Tragopogon lamottei Asteraceae Asterales
common salsify Tragopogon porrifolius Asteraceae Asterales
water-chestnut Trapa natans Trapaceae Myrtales
Chinese tallowtree Triadica sebifera Euphorbiaceae Euphorbiales
horse purslane Trianthema portulacastrum Aizoaceae Caryophyllales
Jamaica feverplant Tribulus cistoides Zygophyllaceae Sapindales
puncturevine Tribulus terrestris Zygophyllaceae Sapindales
vinegarweed Trichostema lanceolatum Lamiaceae Lamiales
coat buttons Tridax procumbens Asteraceae Asterales
purpletop Tridens flavus Poaceae Cyperales
star-flower Trientalis borealis Primulaceae Primulales
rabbitfoot clover Trifolium arvense Fabaceae (Leguminosae) Fabales
large hop clover Trifolium campestre Fabaceae (Leguminosae) Fabales
rose clover Trifolium hirtum Fabaceae (Leguminosae) Fabales
alsike clover Trifolium hybridum Fabaceae (Leguminosae) Fabales
crimson clover Trifolium incarnatum Fabaceae (Leguminosae) Fabales
red clover Trifolium pratense Fabaceae (Leguminosae) Fabales
white clover Trifolium repens Fabaceae (Leguminosae) Fabales
subterranean clover Trifolium subterraneum Fabaceae (Leguminosae) Fabales
seaside arrowgrass Triglochin maritimum Juncaginaceae Najadales
false mayweed Tripleurospermum maritimum Asteraceae Asterales
false chamomile Tripleurospermum perforatum Asteraceae Asterales
eastern gamagrass Tripsacum dactyloides Poaceae Cyperales
springstar Tristagma uniflorum Liliaceae Liliales
common wheat Triticum aestivum Poaceae Cyperales
nasturtium Tropaeolum majus Tropaeolaceae Geraniales
coltsfoot Tussilago farfara Asteraceae Asterales
narrowleaf cattail Typha angustifolia Typhaceae Typhales
common cattail Typha latifolia Typhaceae Typhales
gorse Ulex europaeus Fabaceae (Leguminosae) Fabales
winged elm Ulmus alata Ulmaceae Urticales
Siberian elm Ulmus pumila Ulmaceae Urticales
Caesarweed Urena lobata Malvaceae Malvales
liverseedgrass Urochloa panicoides Poaceae Cyperales
broadleaf signalgrass Urochloa platyphylla Poaceae Cyperales
browntop millet Urochloa ramosa Poaceae Cyperales
Texas millet Urochloa texana Poaceae Cyperales
southern nettle Urtica chamaedryoides Urticaceae Urticales
stinging nettle Urtica dioica Urticaceae Urticales
stinging nettle Urtica dioica ssp. holosericea Urticaceae Urticales
burning nettle Urtica urens Urticaceae Urticales
leafy bladderwort Utricularia foliosa Lentibulariaceae Scrophulariales
humped bladderwort Utricularia gibba Lentibulariaceae Scrophulariales
floating bladderwort Utricularia inflata Lentibulariaceae Scrophulariales
purple bladderwort Utricularia purpurea Lentibulariaceae Scrophulariales
California huckleberry Vaccinium ovatum Ericaceae Ericales
alpine blueberry Vaccinium uliginosum Ericaceae Ericales
common valerian Valeriana officinalis Valerianaceae Dipsacales
beaked cornsalad Valerianella radiata Valerianaceae Dipsacales
American eelgrass Vallisneria americana Hydrocharitaceae Hydrocharitales
ventenata Ventenata dubia Poaceae Cyperales
California false-hellebore Veratrum californicum Liliaceae Liliales
green false-hellebore Veratrum viride Liliaceae Liliales
moth mullein Verbascum blattaria Scrophulariaceae Scrophulariales
common mullein Verbascum thapsus Scrophulariaceae Scrophulariales
purplestamen mullein Verbascum virgatum Scrophulariaceae Scrophulariales
tall vervain Verbena bonariensis Verbenaceae Lamiales
prostrate vervain Verbena bracteata Verbenaceae Lamiales
blue vervain Verbena hastata Verbenaceae Lamiales
Brazilian vervain Verbena incompta Verbenaceae Lamiales
seashore vervain Verbena montevidensis Verbenaceae Lamiales
tuberous vervain Verbena rigida Verbenaceae Lamiales
hoary vervain Verbena stricta Verbenaceae Lamiales
white vervain Verbena urticifolia Verbenaceae Lamiales
crownbeard Verbesina encelioides Asteraceae Asterales
western ironweed Vernonia baldwinii Asteraceae Asterales
tall ironweed Vernonia gigantea Asteraceae Asterales
New York ironweed Vernonia noveboracensis Asteraceae Asterales
field speedwell Veronica agrestis Scrophulariaceae Scrophulariales
water speedwell Veronica anagallis-aquatica Scrophulariaceae Scrophulariales
corn speedwell Veronica arvensis Scrophulariaceae Scrophulariales
twolobe speedwell Veronica biloba Scrophulariaceae Scrophulariales
germander speedwell Veronica chamaedrys Scrophulariaceae Scrophulariales
speedwell Veronica cinerea Scrophulariaceae Scrophulariales
slender speedwell Veronica filiformis Scrophulariaceae Scrophulariales
ivyleaf speedwell Veronica hederifolia Scrophulariaceae Scrophulariales
purslane speedwell Veronica peregrina Scrophulariaceae Scrophulariales
hairy purslane speedwell Veronica peregrina ssp. xalapensis Scrophulariaceae Scrophulariales
Persian speedwell Veronica persica Scrophulariaceae Scrophulariales
wayside speedwell Veronica polita Scrophulariaceae Scrophulariales
thymeleaf speedwell Veronica serpyllifolia Scrophulariaceae Scrophulariales
nannyberry Viburnum lentago Caprifoliaceae Dipsacales
withe-rod Viburnum nudum var. cassinoides Caprifoliaceae Dipsacales
blackhaw viburnum Viburnum prunifolium Caprifoliaceae Dipsacales
bird vetch Vicia cracca Fabaceae (Leguminosae) Fabales
tiny vetch Vicia hirsuta Fabaceae (Leguminosae) Fabales
common vetch Vicia sativa Fabaceae (Leguminosae) Fabales
garden vetch Vicia sativa ssp. nigra Fabaceae (Leguminosae) Fabales
hairy vetch Vicia villosa Fabaceae (Leguminosae) Fabales
cowpea Vigna unguiculata Fabaceae (Leguminosae) Fabales
big periwinkle Vinca major Apocynaceae Gentianales
common periwinkle Vinca minor Apocynaceae Gentianales
field violet Viola arvensis Violaceae Violales
field pansy Viola bicolor Violaceae Violales
lanceleaf violet Viola lanceolata Violaceae Violales
English violet Viola odorata Violaceae Violales
common blue violet Viola sororia Violaceae Violales
pansy Viola tricolor Violaceae Violales
European mistletoe Viscum album Viscaceae Santalales
lilac chastetree Vitex agnus-castus Verbenaceae Lamiales
summer grape Vitis aestivalis Vitaceae Rhamnales
fox grape Vitis labrusca Vitaceae Rhamnales
mustang grape Vitis mustangensis Vitaceae Rhamnales
squirreltail fescue Vulpia bromoides Poaceae Cyperales
small fescue Vulpia microstachys Poaceae Cyperales
rattail fescue Vulpia myuros Poaceae Cyperales
Asiatic bellflower Wahlenbergia marginata Campanulaceae Campanulales
Indian waltheria Waltheria indica Sterculiaceae Malvales
Washington fan palm Washingtonia robusta Arecaceae Arecales
mule-ears Wyethia amplexicaulis Asteraceae Asterales
spiny cocklebur Xanthium spinosum Asteraceae Asterales
common cocklebur Xanthium strumarium Asteraceae Asterales
Asiatic hawksbeard Youngia japonica Asteraceae Asterales
Great Plains yucca Yucca glauca Agavaceae Liliales
horned pondweed Zannichellia palustris Zannichelliaceae Najadales
calla lily Zantedeschia aethiopica Araceae Arales
prickly-ash Zanthoxylum americanum Rutaceae Sapindales
corn Zea mays Poaceae Cyperales
mountain deathcamas Zigadenus elegans Liliaceae Liliales
grassy deathcamas Zigadenus venenosus var. gramineus Liliaceae Liliales
annual wildrice Zizania aquatica Poaceae Cyperales
giant cutgrass Zizaniopsis miliacea Poaceae Cyperales
Syrian beancaper Zygophyllum fabago Zygophyllaceae Sapindales

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