Forbs/Herbs

2292 records

 

Subject Scientific Name Order Family
musk okra Abelmoschus moschatus Medik. Malvales Malvaceae
fragrant white sand verbena Abronia elliptica A. Nelson Caryophyllales Nyctaginaceae
velvetleaf Abutilon theophrasti Medik Malvales Malvaceae
slender copperleaf Acalypha gracilens Gray Euphorbiales Euphorbiaceae
hophornbeam copperleaf Acalypha ostryifolia Riddell Euphorbiales Euphorbiaceae
Virginia copperleaf Acalypha virginica L. Euphorbiales Euphorbiaceae
bristly starbur Acanthospermum hispidum DC Asterales Asteraceae
fernleaf yarrow Achillea filipendulina Lam. Asterales Asteraceae
common yarrow Achillea millefolium L. Asterales Asteraceae
sneezewort yarrow Achillea ptarmica L. Asterales Asteraceae
yarrow Achillea spp. L. Asterales Asteraceae
vanilla leaf Achlys triphylla (Sm.) DC. Ranunculales Berberidaceae
Carmichael's monkshood Aconitum carmichaelii Debeaux Ranunculales Ranunculaceae
Columbian monkshood Aconitum columbianum Nutt. Ranunculales Ranunculaceae
larkspurleaf monkshood Aconitum delphiniifolium DC. Ranunculales Ranunculaceae
Venus' chariot Aconitum napellus L. Ranunculales Ranunculaceae
American sweetflag Acorus calamus L. Arales Acoraceae
Russian knapweed Acroptilon repens (L.) DC. Asterales Asteraceae
black cohosh Actaea racemosa var. racemosa L. Ranunculales Ranunculaceae
red baneberry Actaea rubra (Ait.) Willd. Ranunculales Ranunculaceae
red baneberry Actaea rubra ssp. arguta (Ait.) Willd. (Nutt.) Hultén Ranunculales Ranunculaceae
American trailplant Adenocaulon bicolor Hook. Asterales Asteraceae
wahini noho mauna Adenophorus tamariscinus (Kaulf.) Hook. & Grev. Polypodiales Grammitidaceae
summer pheasant's eye Adonis aestivalis L. Ranunculales Ranunculaceae
pheasanteye adonis Adonis annua L. Ranunculales Ranunculaceae
pheasant's eye Adonis parviceps Ranunculales Ranunculaceae
spring adonis Adonis vernalis L. Ranunculales Ranunculaceae
muskroot Adoxa moschatellina L. Dipsacales Adoxaceae
ye gu Aeginetia indica L. Scrophulariales Orobanchaceae
aeginetia Aeginetia spp. L. Scrophulariales Orobanchaceae
bishops goutweed Aegopodium podagraria L. Apiales Apiaceae
Indian jointvetch Aeschynomene indica L. Fabales Fabaceae (Leguminosae)
beach false foxglove Agalinis fasciculata (Ell.) Raf. Scrophulariales Scrophulariaceae
purple false foxglove Agalinis purpurea (L.) Pennell Scrophulariales Scrophulariaceae
catnip gianthyssop Agastache nepetoides (L.) Kuntze Lamiales Lamiaceae
century plant Agave angustifolia Haw. Liliales Agavaceae
sisal Agave sisalana Perrine Liliales Agavaceae
agave Agave spp. L. Liliales Agavaceae
croftonweed Ageratina adenophora (Spreng.) King & H.E. Robins. Asterales Asteraceae
white snakeroot Ageratina altissima (L.) King & H.E. Robins. Asterales Asteraceae
white snakeroot Ageratina altissima var. altissima (L.) King & H. Rob. Asterales Asteraceae
lesser snakeroot Ageratina aromatica var. aromatica (L.) Spach Asterales Asteraceae
creeping croftonweed Ageratina riparia (Regel) King & H.E. Robins. Asterales Asteraceae
tropic ageratum Ageratum conyzoides L. Asterales Asteraceae
whiteweed Ageratum spp. L. Asterales Asteraceae
orange agoseris Agoseris aurantiaca (Hook.) Greene Asterales Asteraceae
pale agoseris Agoseris glauca (Pursh) Raf. Asterales Asteraceae
harvestlice Agrimonia parviflora Aiton Rosales Rosaceae
corn cockle Agrostemma githago L Caryophyllales Caryophyllaceae
carpet bugle Ajuga reptans L. Lamiales Lamiaceae
hollyhock Alcea rosea L. Malvales Malvaceae
yerba de hierro Alectra fluminensis (Vell.) Stearn Scrophulariales Scrophulariaceae
Rocky Mountain Indian parsley Aletes anisatus (Gray) Theobald & Tseng Apiales Apiaceae
northern waterplantain Alisma plantago-aquatica L. Alismatales Alismataceae
garlic mustard Alliaria petiolata (Bieb.) Cavara & Grande Capparales Brassicaceae
tapertip onion Allium acuminatum Hook. Liliales Liliaceae
shortstyle onion Allium brevistylum S. Watson Liliales Liliaceae
wild onion Allium canadense L. Liliales Liliaceae
nodding onion Allium cernuum Roth Liliales Liliaceae
Cuddy Mountain onion Allium fibrillum M.E. Jones Liliales Liliaceae
rock onion Allium macrum S. Wats Liliales Liliaceae
cultivated garlic Allium sativum L. Liliales Liliaceae
Little River Canyon onion Allium speculae Ownbey & Aase Liliales Liliaceae
onions Allium spp. L. Liliales Liliaceae
textile onion Allium textile A. Nels. & J.F. Macbr Liliales Liliaceae
ramsons Allium ursinum L. Liliales Liliaceae
Pacific onion Allium validum S. Wats. Liliales Liliaceae
wild garlic Allium vineale L. Liliales Liliaceae
alkalai marsh aster Almutaster pauciflorus (Nutt.) A.& D. Löve Asterales Asteraceae
aloe Aloe spp. L. Liliales Aloaceae
Barbados aloe Aloe vera (L.) Burm. f. Liliales Aloaceae
red ginger Alpinia purpurata (Vieill.) K. Schum. Zingiberales Zingiberaceae
mat chaff-flower Alternanthera caracasana Kunth Caryophyllales Amaranthaceae
alligatorweed Alternanthera philoxeroides (Mart.) Griseb. Caryophyllales Amaranthaceae
khakiweed Alternanthera pungens Kunth Caryophyllales Amaranthaceae
sessile joyweed Alternanthera sessilis (L.) R. Br. ex DC. Caryophyllales Amaranthaceae
yellow alyssum Alyssum alyssoides (L.) L Capparales Brassicaceae
tumble pigweed Amaranthus albus L Caryophyllales Amaranthaceae
prostrate pigweed Amaranthus blitoides S. Wats Caryophyllales Amaranthaceae
livid amaranth Amaranthus blitum L. Caryophyllales Amaranthaceae
low amaranth Amaranthus deflexus L. Caryophyllales Amaranthaceae
smooth pigweed Amaranthus hybridus L Caryophyllales Amaranthaceae
Palmer amaranth Amaranthus palmeri S. Wats. Caryophyllales Amaranthaceae
Powell amaranth Amaranthus powellii S. Wats Caryophyllales Amaranthaceae
redroot pigweed Amaranthus retroflexus L. Caryophyllales Amaranthaceae
common waterhemp Amaranthus rudis Sauer Caryophyllales Amaranthaceae
spiny amaranth Amaranthus spinosus L Caryophyllales Amaranthaceae
pigweed Amaranthus spp. L. Caryophyllales Amaranthaceae
tall waterhemp Amaranthus tuberculatus (Moq.) Sauer Caryophyllales Amaranthaceae
slender amaranth Amaranthus viridis L Caryophyllales Amaranthaceae
amaryllis Amaryllis spp. L. Liliales Liliaceae
annual bursage Ambrosia acanthicarpa Hook Asterales Asteraceae
common ragweed Ambrosia artemisiifolia L. Asterales Asteraceae
annual ragweed Ambrosia artemisiifolia var. elatior (L.) Descourtils Asterales Asteraceae
lanceleaf ragweed Ambrosia bidentata Michx. Asterales Asteraceae
woollyleaf bursage Ambrosia grayi (A. Nels.) Shinners Asterales Asteraceae
western ragweed Ambrosia psilostachya DC Asterales Asteraceae
skeletonleaf bursage Ambrosia tomentosa Nutt. Asterales Asteraceae
giant ragweed Ambrosia trifida L. Asterales Asteraceae
flypoison Amianthium muscitoxicum (Walt.) Gray Liliales Liliaceae
redstem Ammannia coccinea Rottb Myrtales Lythraceae
greater ammi Ammi majus L. Apiales Apiaceae
toothpick ammi Ammi visnaga (L.) Lam. Apiales Apiaceae
leadplant Amorpha canescens Pursh Fabales Fabaceae (Leguminosae)
Eastwood's fiddleneck Amsinckia eastwoodiae J.F. Macbr. Lamiales Boraginaceae
tarweed fiddleneck Amsinckia lycopsoides Lehm. Lamiales Boraginaceae
common fiddleneck Amsinckia menziesii var. intermedia (Fisch. & C.A. Mey.) Ganders Lamiales Boraginaceae
western fiddleneck Amsinckia tessellata A. Gray Lamiales Boraginaceae
Texas bluestar Amsonia ciliata var. texana (A. Gray) J.M. Coult. Gentianales Apocynaceae
eastern bluestar Amsonia tabernaemontana Walt. Gentianales Apocynaceae
scarlet pimpernel Anagallis arvensis L Primulales Primulaceae
flaxleaf pimpernel Anagallis monelli L. Primulales Primulaceae
pearly everlasting Anaphalis margaritacea (L.) Benth. Asterales Asteraceae
small bugloss Anchusa arvensis (L.) Bieb Lamiales Boraginaceae
common bugloss Anchusa officinalis L. Lamiales Boraginaceae
round-lobe hepatica Anemone americana (DC.) H. Hara Ranunculales Ranunculaceae
Greek thimbleweed Anemone blanda Schott & Kotschy Ranunculales Ranunculaceae
Canadian anemone Anemone canadensis L. Ranunculales Ranunculaceae
Pacific anemone Anemone multifida Poir. Ranunculales Ranunculaceae
narcissus anemone Anemone narcissiflora L. Ranunculales Ranunculaceae
European thimbleweed Anemone nemorosa L. Ranunculales Ranunculaceae
smallflowered anemone Anemone parviflora Michx. Ranunculales Ranunculaceae
Piper's anemone Anemone piperi Britt. ex Rydb. Ranunculales Ranunculaceae
wood anemone Anemone quinquefolia L. Ranunculales Ranunculaceae
grape-leaf anemone Anemone tomentosa (Maxim.) C. P'ei Ranunculales Ranunculaceae
tall thimbleweed Anemone virginiana L. Ranunculales Ranunculaceae
Japanese anemone Anemone x hybrida Paxton [hupehensis × vitifolia] Ranunculales Ranunculaceae
giant angelica Angelica ampla A. Nels Apiales Apiaceae
Gray's angelica Angelica grayi (Coult. & Rose) Coult. & Rose Apiales Apiaceae
spurred anoda Anoda cristata (L.) Schlecht Malvales Malvaceae
Texas madeiravine Anredera vesicaria Lam.) Gaertn. F Caryophyllales Basellaceae
pearly pussytoes Antennaria anaphaloides Rydb. Asterales Asteraceae
small-leaf pussytoes Antennaria parvifolia Nutt. Asterales Asteraceae
rosy pussytoes Antennaria rosea Greene Asterales Asteraceae
umber pussytoes Antennaria umbrinella Rydb. Asterales Asteraceae
corn chamomile Anthemis arvensis L. Asterales Asteraceae
stinking chamomile Anthemis cotula L Asterales Asteraceae
yellow chamomile Anthemis tinctoria L. Asterales Asteraceae
bur chervil Anthriscus caucalis M. Bieb. Apiales Apiaceae
chervil Anthriscus cerefolium (L.) Hoffm. Apiales Apiaceae
wild chervil Anthriscus sylvestris (L.) Hoffmann Apiales Apiaceae
flamingo flower Anthurium andraeanum Linden Arales Araceae
laceleaf Anthurium spp. Schott Arales Araceae
common kidneyvetch Anthyllis vulneraria L. Fabales Fabaceae (Leguminosae)
snapdragon Antirrhinum majus L. Plantaginales Plantaginaceae
spreading dogbane Apocynum androsaemifolium L. Gentianales Apocynaceae
hemp dogbane Apocynum cannabinum L. Gentianales Apocynaceae
Dailey's columbine Aquilegia caerulea daileyae (James) Eastw. Ranunculales Ranunculaceae
Colorado blue columbine Aquilegia caerulea James Ranunculales Ranunculaceae
red columbine Aquilegia canadensis L. Ranunculales Ranunculaceae
western red columbine Aquilegia elegantula Greene Ranunculales Ranunculaceae
western columbine Aquilegia formosa Fisch. ex DC. Ranunculales Ranunculaceae
columbine Aquilegia spp. L. Ranunculales Ranunculaceae
European columbine Aquilegia vulgaris L. Ranunculales Ranunculaceae
mouse-ear cress Arabidopsis thaliana (L.) Heynh Capparales Brassicaceae
nodding rockcress Arabis demissa Greene Capparales Brassicaceae
Drummond's rockcress Arabis drummondii Gray Capparales Brassicaceae
Fendler's rockcress Arabis fendleri (S. Wats.) Greene Capparales Brassicaceae
tower-mustard Arabis glabra (L.) Bernh. Capparales Brassicaceae
hairy rockcress Arabis hirsuta (L.) Scop. Capparales Brassicaceae
Lemmon's rockcress Arabis lemmonii S. Wats. Capparales Brassicaceae
desert rockcress Arabis lignifera A. Nels. Capparales Brassicaceae
Gunnison County rockcress Arabis pallidifolia Rollins Capparales Brassicaceae
peanut Arachis hypogaea L. Fabales Fabaceae (Leguminosae)
wild sarsaparilla Aralia nudicaulis L. Apiales Araliaceae
great burdock Arctium lappa L. Asterales Asteraceae
common burdock Arctium minus Bernh. Asterales Asteraceae
capeweed Arctotheca calendula (L.) Levyns Asterales Asteraceae
prickly sandwort Arenaria aculeata S. Watson Caryophyllales Caryophyllaceae
Fendler's sandwort Arenaria fendleri Gray Caryophyllales Caryophyllaceae
Hooker's sandwort Arenaria hookeri Nutt Caryophyllales Caryophyllaceae
spreading sandwort Arenaria lanuginosa (Michx.) Rohrb. Caryophyllales Caryophyllaceae
thymeleaf sandwort Arenaria serpyllifolia L. Caryophyllales Caryophyllaceae
bluestem pricklepoppy Argemone albiflora Hornem. Papaverales Papaveraceae
Mexican pricklepoppy Argemone mexicana L Papaverales Papaveraceae
flatbud pricklypoppy Argemone munita Dur. & Hilg. Papaverales Papaveraceae
annual pricklepoppy Argemone polyanthemos (Fedde) G.B. Ownbey Papaverales Papaveraceae
pricklypoppy Argemone spp. L. Papaverales Papaveraceae
silverweed cinquefoil Argentina anserina (L.) Rydb. Rosales Rosaceae
green dragon Arisaema dracontium (L.) Schott Arales Araceae
Jack in the pulpit Arisaema triphyllum (L.) Schott Arales Araceae
Jack in the pulpit Arisaema triphyllum ssp. triphyllum (L.) Schott Arales Araceae
birthwort Aristolochia clematitis L. Aristolochiales Aristolochiaceae
thrift seapink Armeria maritima (P. Mill.) Willd. Plumbaginales Plumbaginaceae
narrowleaf arnica Arnica angustifolia Vahl Asterales Asteraceae
Chamisso arnica Arnica chamissonis Less. Asterales Asteraceae
heartleaf arnica Arnica cordifolia Hook. Asterales Asteraceae
broadleaf arnica Arnica latifolia Bong. Asterales Asteraceae
hairy arnica Arnica mollis Hook. Asterales Asteraceae
Parry's arnica Arnica parryi Gray Asterales Asteraceae
rayless arnica Arnica x diversifolia Greene (pro sp.) [amplexicaulis or mollis × cordifolia or latifolia] Asterales Asteraceae
absinth wormwood Artemisia absinthium L. Asterales Asteraceae
annual wormwood Artemisia annua L. Asterales Asteraceae
little sagebrush Artemisia arbuscula Nutt. Asterales Asteraceae
biennial wormwood Artemisia biennis Willd Asterales Asteraceae
common sagewort Artemisia campestris L Asterales Asteraceae
California mugwort Artemisia douglasiana Besser Asterales Asteraceae
tarragon Artemisia dracunculus L. Asterales Asteraceae
ragweed sagebrush Artemisia franserioides Greene Asterales Asteraceae
Louisiana wormwood Artemisia ludoviciana Nutt. Asterales Asteraceae
Michaux's wormwood Artemisia michauxiana Bess. Asterales Asteraceae
satiny wormwood Artemisia schmidtiana Maxim. Asterales Asteraceae
alpine sagebrush Artemisia scopulorum Gray Asterales Asteraceae
mugwort Artemisia vulgaris L. Asterales Asteraceae
giant reed Arundo donax L. Cyperales Poaceae
Canadian wildginger Asarum canadense L. Aristolochiales Aristolochiaceae
British Columbia wildginger Asarum caudatum Lindl. Aristolochiales Aristolochiaceae
spider milkweed Asclepias asperula (Dcne.) Woods Gentianales Asclepiadaceae
Mexican whorled milkweed Asclepias fascicularis Dcne. Gentianales Asclepiadaceae
swamp milkweed Asclepias incarnata L. Gentianales Asclepiadaceae
broadleaf milkweed Asclepias latifolia (Torr.) Raf. Gentianales Asclepiadaceae
plains milkweed Asclepias pumila (A. Gray) Vail Gentianales Asclepiadaceae
showy milkweed Asclepias speciosa Torr Gentianales Asclepiadaceae
milkweed Asclepias spp. L. Gentianales Asclepiadaceae
western whorled milkweed Asclepias subverticillata (Gray) Vail Gentianales Asclepiadaceae
common milkweed Asclepias syriaca L. Gentianales Asclepiadaceae
butterfly milkweed Asclepias tuberosa L. Gentianales Asclepiadaceae
redring milkweed Asclepias variegata L. Gentianales Asclepiadaceae
eastern whorled milkweed Asclepias verticillata L. Gentianales Asclepiadaceae
green milkweed Asclepias viridiflora Raf. Gentianales Asclepiadaceae
green antelopehorn Asclepias viridis Walt. Gentianales Asclepiadaceae
asparagus Asparagus officinalis L. Liliales Liliaceae
asparagus Asparagus spp. L. Liliales Liliaceae
catchweed Asperugo procumbens L. Lamiales Boraginaceae
asphodel Asphodelus albus Miller Liliales Liliaceae
onionweed Asphodelus fistulosus Linnaeus Liliales Liliaceae
aster Aster spp. L. Asterales Asteraceae
estrellita Asteranthera ovata Hanst. Scrophulariales Gesneriaceae
tufted milkvetch Astragalus adsurgens Jacq. Fabales Fabaceae (Leguminosae)
alpine milkvetch Astragalus alpinus L. Fabales Fabaceae (Leguminosae)
twogrooved milkvetch Astragalus bisulcatus (Hook.) Gray Fabales Fabaceae (Leguminosae)
Canada milkvetch Astragalus canadensis L. Fabales Fabaceae (Leguminosae)
Drummond's milkvetch Astragalus drummondii Dougl. ex Hook. Fabales Fabaceae (Leguminosae)
Hall's milkvetch Astragalus hallii Gray Fabales Fabaceae (Leguminosae)
spiny milkvetch Astragalus kentrophyta A. Gray Fabales Fabaceae (Leguminosae)
timber milkvetch Astragalus miser Dougl. Fabales Fabaceae (Leguminosae)
Leadville milkvetch Astragalus molybdenus Barneby Fabales Fabaceae (Leguminosae)
Parry's milkvetch Astragalus parryi Gray Fabales Fabaceae (Leguminosae)
Patterson's milkvetch Astragalus pattersonii Gray Fabales Fabaceae (Leguminosae)
woollypod milkvetch Astragalus purshii Dougl. ex Hook. Fabales Fabaceae (Leguminosae)
cream milkvetch Astragalus racemosus Pursh Fabales Fabaceae (Leguminosae)
Robbins' milkvetch Astragalus robbinsii (Oakes) A. Gray Fabales Fabaceae (Leguminosae)
milkvetch Astragalus spp. L. Fabales Fabaceae (Leguminosae)
Utah milkvetch Astragalus utahensis (Torr.) Torr. & Gray Fabales Fabaceae (Leguminosae)
saltbush Atriplex fera L. Bunge Caryophyllales Chenopodiaceae
garden orach Atriplex hortensis L. Caryophyllales Chenopodiaceae
twoscale saltbush Atriplex micrantha Ledeb. Caryophyllales Chenopodiaceae
halberdleaf orach Atriplex patula L. Caryophyllales Chenopodiaceae
triangle orach Atriplex prostrata Bouchér ex DC. Caryophyllales Chenopodiaceae
red orach Atriplex rosea L. Caryophyllales Chenopodiaceae
Australian saltbush Atriplex semibaccata R. Br. Caryophyllales Chenopodiaceae
saltbush Atriplex spp. L. Caryophyllales Chenopodiaceae
peregrine saltbush Atriplex suberecta I. Verd. Caryophyllales Chenopodiaceae
Wolf's saltweed Atriplex wolfii S. Wats. Caryophyllales Chenopodiaceae
belladonna Atropa bella-donna L. Solanales Solanaceae
fernleaf yellow false foxglove Aureolaria pedicularia (L.) Raf. Scrophulariales Scrophulariaceae
downy yellow false foxglove Aureolaria virginica (L.) Pennell Scrophulariales Scrophulariaceae
Carolina mosquitofern Azolla caroliniana Willd. Hydropteridales Azollaceae
Pacific mosquitofern Azolla filiculoides Lam. Hydropteridales Azollaceae
Mexican mosquitofern Azolla mexicana Schltdl. & Cham. ex C. Presl Hydropteridales Azollaceae
ragleaf bahia Bahia dissecta (Gray) Britt. Asterales Asteraceae
black horehound Ballota nigra L. Lamiales Lamiaceae
Hooker's balsamroot Balsamorhiza hookeri Nutt. Asterales Asteraceae
arrowleaf balsamroot Balsamorhiza sagittata (Pursh) Nutt. Asterales Asteraceae
serrate balsamroot Balsamorhiza serrata . Nelson & J.F. Macbr. Asterales Asteraceae
largeleaf wild indigo Baptisia alba var. macrophylla (Larisey) Isely Fabales Fabaceae (Leguminosae)
blue wild indigo Baptisia australis (L.) R. Br. ex Ait. f. Fabales Fabaceae (Leguminosae)
longbract wild indigo Baptisia bracteata Muhl. ex Elliot Fabales Fabaceae (Leguminosae)
gopherweed Baptisia lanceolata (Walt.) Ell. Fabales Fabaceae (Leguminosae)
American yellow rocket Barbarea orthoceras Ledeb Capparales Brassicaceae
early wintercress Barbarea verna (Mill.) Asch. Capparales Brassicaceae
yellow rocket Barbarea vulgaris Ait. f. Capparales Brassicaceae
fivehook bassia Bassia hyssopifolia (Pallas) Kuntz Caryophyllales Chenopodiaceae
Mexican fireweed Bassia scoparia (L.) A.J. Scott Caryophyllales Chenopodiaceae
begonia Begonia spp. L. Violales Begoniaceae
blackberry lily Belamcanda chinensis (L.) DC. Liliales Iridaceae
bellardia Bellardia trixago (L.) All Scrophulariales Scrophulariaceae
English daisy Bellis perennis L. Asterales Asteraceae
hoary alyssum Berteroa incana (L.) DC Capparales Brassicaceae
cutleaf waterparsnip Berula erecta (Huds.) Coville Apiales Apiaceae
alpine besseya Besseya alpina (Gray) Rydb. Scrophulariales Scrophulariaceae
White River coraldrops Besseya plantaginea (James) Rydb. Scrophulariales Scrophulariaceae
romerillo Bidens alba (L.) DC Asterales Asteraceae
bearded beggarticks Bidens aristosa (Michx.) Britt. Asterales Asteraceae
spanishneedles Bidens bipinnata L. Asterales Asteraceae
nodding beggarticks Bidens cernua L Asterales Asteraceae
devils beggarticks Bidens frondosa L. Asterales Asteraceae
burmarigold Bidens laevis (L.) Britton, Sterns & Poggenb. Asterales Asteraceae
hairy beggarticks Bidens pilosa L. Asterales Asteraceae
bur beggarticks Bidens tripartita L. Asterales Asteraceae
horsemint Blephilia ciliata (L.) Benth. Lamiales Lamiaceae
smallspike false nettle Boehmeria cylindrica (L.) Sw. Urticales Urticaceae
red spiderling Boerhavia diffusa L. Caryophyllales Nyctaginaceae
anena Boerhavia repens L. Caryophyllales Nyctaginaceae
common borage Borago officinalis L. Lamiales Boraginaceae
cutleaf grapefern Botrychium dissectum Spreng. Ophioglossales Ophioglossaceae
hoary bowlesia Bowlesia incana Ruiz & Pavón Apiales Apiaceae
watershield Brasenia schreberi J.F. Gmel. Nymphaeales Cabombaceae
Indian mustard Brassica juncea (L.) Czern Capparales Brassicaceae
rapeseed Brassica napus L. Capparales Brassicaceae
black mustard Brassica nigra (L.) W.D.J. Koch Capparales Brassicaceae
birdsrape mustard Brassica rapa L. Capparales Brassicaceae
field mustard Brassica rapa var. rapa L. Capparales Brassicaceae
African mustard Brassica tournefortii Gouan Capparales Brassicaceae
tasselflower brickellbush Brickellia grandiflora (Hook.) Nutt. Asterales Asteraceae
pinguin Bromelia pinguin L. Bromeliales Bromeliaceae
white bryony Bryonia alba L. Violales Cucurbitaceae
corn gromwell Buglossoides arvensis (L.) I.M. Johnston Lamiales Boraginaceae
crested bunias Bunias erucago L. Capparales Brassicaceae
Hill mustard Bunias orientalis L. Capparales Brassicaceae
flowering rush Butomus umbellatus L. Alismatales Butomaceae
fanwort Cabomba caroliniana L Nymphaeales Cabombaceae
redmaids Calandrinia ciliata (Ruiz & Pavón) DC Caryophyllales Portulacaceae
rattlesnake plant Calathea crotalifera S. Wats. Zingiberales Marantaceae
lady's slipper Calceolaria tenella Poepp. & Endl Scrophulariales Scrophulariaceae
sand lady's slipper Calceolaria uniflora Lam. Scrophulariales Scrophulariaceae
field marigold Calendula arvensis L. Asterales Asteraceae
purple poppymallow Callirhoe involucrata (Torr. & Gray) Gray Malvales Malvaceae
basketplant Callisia fragrans (Lindl.) Woods Commelinales Commelinaceae
heather Calluna vulgaris (L.) Hull Ericales Ericaceae
elegant mariposa lily Calochortus elegans Pursh Liliales Liliaceae
white mariposa lily Calochortus eurycarpus S. Wats. Liliales Liliaceae
Gunnison's mariposa lily Calochortus gunnisonii S. Wats. Liliales Liliaceae
sagebrush mariposa lily Calochortus macrocarpus Dougl. Liliales Liliaceae
sego lily Calochortus nuttallii Torr. & A. Gray Liliales Liliaceae
mariposa lily Calochortus spp. Pursh Liliales Liliaceae
tuberous grasspink Calopogon tuberosus var. tuberosus (L.) Britton, Sterns & Poggenb. Orchidales Orchidaceae
white marsh marigold Caltha leptosepala DC. Ranunculales Ranunculaceae
white marsh marigold Caltha leptosepala ssp. leptosepala var. leptosepala D.C. Ranunculales Ranunculaceae
yellow marsh marigold Caltha palustris L. Ranunculales Ranunculaceae
fairy slipper Calypso bulbosa (L.) Oakes Orchidales Orchidaceae
sprawling horseweed Calyptocarpus vialis Less. Asterales Asteraceae
small camas Camassia quamash (Pursh) Greene Liliales Liliaceae
smallseed falseflax Camelina microcarpa DC. Capparales Brassicaceae
tussock bellflower Campanula carpatica Jacq. Campanulales Campanulaceae
clustered bellflower Campanula glomerata L. Campanulales Campanulaceae
Parry's bellflower Campanula parryi Gray Campanulales Campanulaceae
spotted bellflower Campanula punctata Lam. Campanulales Campanulaceae
creeping bellflower Campanula rapunculoides L. Campanulales Campanulaceae
harebell Campanula rotundifolia L. Campanulales Campanulaceae
arctic bellflower Campanula uniflora L. Campanulales Campanulaceae
American bellflower Campanulastrum americanum (L.) Small Campanulales Campanulaceae
canna Canna spp. L. Zingiberales Cannaceae
marijuana Cannabis sativa L Urticales Cannabaceae
capparis Capparis odoratissima Jacq. Capparales Capparaceae
shepherd's-purse Capsella bursa-pastoris (L.) Medik. Capparales Brassicaceae
slender toothwort Cardamine angustata O.E. Schulz Capparales Brassicaceae
cutleaf toothwort Cardamine concatenata (Michx.) Sw. Capparales Brassicaceae
heartleaf bittercress Cardamine cordifolia Gray Capparales Brassicaceae
woodland bittercress Cardamine flexuosa With. Capparales Brassicaceae
hairy bittercress Cardamine hirsuta L Capparales Brassicaceae
narrowleaf bittercress Cardamine impatiens L. Capparales Brassicaceae
little western bittercress Cardamine oligosperma Nutt. Capparales Brassicaceae
smallflowered bittercress Cardamine parviflora L Capparales Brassicaceae
Pennsylvania bittercress Cardamine pensylvanica Muhl. ex Willd. Capparales Brassicaceae
cuckoo bittercress Cardamine pratensis L. Capparales Brassicaceae
bittercress Cardamine spp. L. Capparales Brassicaceae
lens-podded whitetop Cardaria chalapensis (L.) Hand.-Maz Capparales Brassicaceae
hoary cress Cardaria draba (L.) Desv Capparales Brassicaceae
hairy whitetop Cardaria pubescens (C.A. Mey.) Capparales Brassicaceae
spiny plumeless thistle Carduus acanthoides L. Asterales Asteraceae
musk thistle Carduus nutans L. Asterales Asteraceae
Italian plumeless thistle Carduus pycnocephalus L. Asterales Asteraceae
slenderflower thistle Carduus tenuiflorus W. Curtis Asterales Asteraceae
vanillaleaf Carphephorus odoratissimus (J.F. Gmel.) Herbert Asterales Asteraceae
hairy chaffhead Carphephorus paniculatus (J.F. Gmel.) Herbert Asterales Asteraceae
sea fig Carpobrotus chilensis (Molina) N.E. Br. Caryophyllales Aizoaceae
hottentot fig Carpobrotus edulis (L.) N.E. Br Caryophyllales Aizoaceae
woolly distaff thistle Carthamus lanatus L. Asterales Asteraceae
wild safflower Carthamus oxyacanthus M. Bieberstein Asterales Asteraceae
safflower Carthamus tinctorius L. Asterales Asteraceae
common caraway Carum carvi L. Apiales Apiaceae
desert paintbrush Castilleja angustifolia dubia A. Nels. Scrophulariales Scrophulariaceae
wavyleaf Indian paintbrush Castilleja applegatei Fern. Scrophulariales Scrophulariaceae
field Indian paintbrush Castilleja arvensis Cham. & Schlecht Scrophulariales Scrophulariaceae
scarlet Indian paintbrush Castilleja coccinea (L.) Spreng. Scrophulariales Scrophulariaceae
Hayden's Indian paintbrush Castilleja haydenii (Gray) Cockerell Scrophulariales Scrophulariaceae
harsh Indian paintbrush Castilleja hispida Benth. Scrophulariales Scrophulariaceae
wholeleaf Indian paintbrush Castilleja integra Gray Scrophulariales Scrophulariaceae
Wyoming Indian paintbrush Castilleja linariifolia Benth. Scrophulariales Scrophulariaceae
giant red Indian paintbrush Castilleja miniata Dougl. ex Hook. Scrophulariales Scrophulariaceae
western Indian paintbrush Castilleja occidentalis Torr. Scrophulariales Scrophulariaceae
Raup's Indian paintbrush Castilleja raupii Pennell Scrophulariales Scrophulariaceae
splitleaf Indian paintbrush Castilleja rhexiifolia Rydb. Scrophulariales Scrophulariaceae
Indian paintbrush Castilleja spp. Mutis ex L.f. Scrophulariales Scrophulariaceae
sulphur Indian paintbrush Castilleja sulphurea Rydb. Scrophulariales Scrophulariaceae
Madagascar periwinkle Catharanthus roseus (L.) G. Don Gentianales Apocynaceae
carrot bur parsley Caucalis platycarpos L. Apiales Apiaceae
blue cohosh Caulophyllum thalictroides (L.) Michx. Ranunculales Berberidaceae
Celosia Celosia spp. L. Caryophyllales Amaranthaceae
purple starthistle Centaurea calcitrapa L. Asterales Asteraceae
cornflower Centaurea cyanus L. Asterales Asteraceae
diffuse knapweed Centaurea diffusa Lam. Asterales Asteraceae
North African knapweed Centaurea diluta Ait. Asterales Asteraceae
brown knapweed Centaurea jacea L. Asterales Asteraceae
bighead knapweed Centaurea macrocephala Puschk. ex Willd. Asterales Asteraceae
Malta starthistle Centaurea melitensis L. Asterales Asteraceae
perennial cornflower Centaurea montana L. Asterales Asteraceae
black knapweed Centaurea nigra L. Asterales Asteraceae
Vochin knapweed Centaurea nigrescens Willd Asterales Asteraceae
Iberian knapweed Centaurea pullata L. Asterales Asteraceae
yellow starthistle Centaurea solstitialis L. Asterales Asteraceae
knapweeds Centaurea spp. L. Asterales Asteraceae
spotted knapweed Centaurea stoebe ssp. micranthos (Gugler) Hayek Asterales Asteraceae
sulphur knapweed Centaurea sulphurea Willd Asterales Asteraceae
squarrose knapweed Centaurea virgata Lam. Asterales Asteraceae
meadow knapweed Centaurea x moncktonii C. E. Britton Asterales Asteraceae
Asiatic pennywort Centella asiatica (L.) Urban Apiales Apiaceae
red valerian Centranthus ruber (L.) DC. Dipsacales Valerianaceae
pappose tarweed Centromadia parryi ssp. rudis (Greene) B.G. Baldw. Asterales Asteraceae
common tarweed Centromadia pungens ssp. pungens (Hook. & Arn.) Greene Asterales Asteraceae
field chickweed Cerastium arvense L. Caryophyllales Caryophyllaceae
field chickweed Cerastium arvense ssp. strictum (L.) Ugborogho Caryophyllales Caryophyllaceae
Bering chickweed Cerastium beeringianum Cham. & Schlecht. Caryophyllales Caryophyllaceae
common mouse-ear chickweed Cerastium fontanum Baumg. Caryophyllales Caryophyllaceae
big chickweed Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet Caryophyllales Caryophyllaceae
sticky chickweed Cerastium glomeratum Thuill. Caryophyllales Caryophyllaceae
mouse-ear chickweed Cerastium spp. L. Caryophyllales Caryophyllaceae
snow in summer Cerastium tomentosum L. Caryophyllales Caryophyllaceae
bur buttercup Ceratocephala testiculata (Crantz) Bess. Ranunculales Ranunculaceae
coontail Ceratophyllum demersum L. Lecanorales Parmeliaceae
Douglas' dustymaiden Chaenactis douglasii (Hook.) Hook. & Arn. Asterales Asteraceae
pincushion Chaenactis spp. DC. Asterales Asteraceae
dwarf snapdragon Chaenorhinum minus (L.) Lange Scrophulariales Scrophulariaceae
turnip-root chervil Chaerophyllum bulbosum L. Apiales Apiaceae
rough chervil Chaerophyllum temulum L. Apiales Apiaceae
partridgepea Chamaecrista fasciculata (Michx.) Greene Fabales Fabaceae (Leguminosae)
sleepingplant Chamaecrista fasciculata var. fasciculata (Michx.) Greene Fabales Fabaceae (Leguminosae)
sensitive partridgepea Chamaecrista nictitans (L.) Moench Fabales Fabaceae (Leguminosae)
fairywand Chamaelirium luteum (L.) Gray Liliales Liliaceae
bunchberry dogwood Chamaepericlymenum canadense L. Cornales Cornaceae
hairy five eyes Chamaesaracha sordida (Dunal) A. Gray Solanales Solanaceae
ridgeseed spurge Chamaesyce glyptosperma (Engelm.) Euphorbiales Euphorbiaceae
prostrate spurge Chamaesyce humistrata (Engelm.) Small Euphorbiales Euphorbiaceae
graceful sandmat Chamaesyce hypericifolia (L.) Millsp. Euphorbiales Euphorbiaceae
hyssop spurge Chamaesyce hyssopifolia (L.) Small Euphorbiales Euphorbiaceae
spotted spurge Chamaesyce maculata (L.) Small Euphorbiales Euphorbiaceae
nodding spurge Chamaesyce nutans (Lag.) Small Euphorbiales Euphorbiaceae
ground spurge Chamaesyce prostrata (Ait.) Small Euphorbiales Euphorbiaceae
thymeleaf sandmat Chamaesyce serpyllifolia ssp. serpyllifolia (Pers.) Small Euphorbiales Euphorbiaceae
fireweed Chamerion angustifolium (L.) Holub Myrtales Onagraceae
dwarf fireweed Chamerion latifolium (L.) Holub Myrtales Onagraceae
lace lipfern Cheilanthes gracillima D.C. Eat. Polypodiales Pteridaceae
greater celandine Chelidonium majus L. Papaverales Papaveraceae
white turtlehead Chelone glabra L. Scrophulariales Scrophulariaceae
red turtlehead Chelone obliqua L. Scrophulariales Scrophulariaceae
lambsquarters Chenopodium album L Caryophyllales Chenopodiaceae
Missouri lambsquarters Chenopodium album var. missouriense (Aellen) I.J. Bassett & C.W. Crompton Caryophyllales Chenopodiaceae
mexicantea Chenopodium ambrosioides L. Caryophyllales Chenopodiaceae
netseed lambsquarters Chenopodium berlandieri Moq Caryophyllales Chenopodiaceae
perennial goosefoot Chenopodium bonus-henricus L. Caryophyllales Chenopodiaceae
Jerusalem-oak goosefoot Chenopodium botrys L. Caryophyllales Chenopodiaceae
blite goosefoot Chenopodium capitatum (L.) Ambrosi Caryophyllales Chenopodiaceae
figleaved goosefoot Chenopodium ficifolium Sm. Caryophyllales Chenopodiaceae
cutleaf goosefoot Chenopodium multifidum L. Caryophyllales Chenopodiaceae
nettleleaf goosefoot Chenopodium murale L. Caryophyllales Chenopodiaceae
seaport goosefoot Chenopodium opulifolium Schrad. ex W.D.J. Koch & Ziz Caryophyllales Chenopodiaceae
clammy goosefoot Chenopodium pumilio R. Br. Caryophyllales Chenopodiaceae
quinoa Chenopodium quinoa Willd. Caryophyllales Chenopodiaceae
giantseed goosefoot Chenopodium simplex (Torr.) Raf. Caryophyllales Chenopodiaceae
goosefoot Chenopodium spp. L. Caryophyllales Chenopodiaceae
stinking goosefoot Chenopodium vulvaria L. Caryophyllales Chenopodiaceae
spotted wintergreen Chimaphila maculata (L.) Pursh Ericales Pyrolaceae
Rocky Mountain snowlover Chionophila jamesii Benth. Scrophulariales Scrophulariaceae
orchid Chloraea alpina Poepp. Orchidales Orchidaceae
orchid Chloraea gavilu Lindl. Orchidales Orchidaceae
rush skeletonweed Chondrilla juncea L. Asterales Asteraceae
blue mustard Chorispora tenella (Pallas) DC. Capparales Brassicaceae
arctic daisy Chrysanthemum arcticum L. Asterales Asteraceae
pyrethum daisy Chrysanthemum coccineum Willd. Asterales Asteraceae
chrysanthemum Chrysanthemum spp. L. Asterales Asteraceae
green and gold Chrysogonum virginianum L. Asterales Asteraceae
Maryland goldenaster Chrysopsis mariana (L.) Ell. Asterales Asteraceae
golden saxifrage Chrysosplenium tetrandrum (Lund ex Malmgr.) Th. Fries Rosales Saxifragaceae
chick pea Cicer arietinum L. Fabales Fabaceae (Leguminosae)
cultivated endive Cichorium endivia L. Asterales Asteraceae
chicory Cichorium intybus L. Asterales Asteraceae
western waterhemlock Cicuta douglasii (DC.) Coult. & Rose Apiales Apiaceae
spotted waterhemlock Cicuta maculata L. Apiales Apiaceae
spotted water hemlock Cicuta maculata var. angustifolia Hook. Apiales Apiaceae
tall thistle Cirsium altissimum (L.) Hill Asterales Asteraceae
Arizona thistle Cirsium arizonicum (Gray) Petrak Asterales Asteraceae
Canada thistle Cirsium arvense (L.) Scop. Asterales Asteraceae
Palouse thistle Cirsium brevifolium Nutt. Asterales Asteraceae
Cainville thistle Cirsium calcareum (M.E. Jones) Woot. & Standl. Asterales Asteraceae
peregrine thistle Cirsium cymosum (Greene) J.T. Howell Asterales Asteraceae
Eaton's thistle Cirsium eatonii (Gray) B.L. Robins. Asterales Asteraceae
yellow thistle Cirsium horridulum Michx. Asterales Asteraceae
Le Conte's thistle Cirsium lecontei Torr. & Gray Asterales Asteraceae
New Mexico thistle Cirsium neomexicanum Gray Asterales Asteraceae
snowy thistle Cirsium occidentale var. candidissimum (Greene) J.F. Macbr. Asterales Asteraceae
yellowspine thistle Cirsium ochrocentrum Gray Asterales Asteraceae
meadow thistle Cirsium scariosum Nutt. Asterales Asteraceae
mountain thistle Cirsium scopulorum (Greene) Cockerell ex Daniels Asterales Asteraceae
thistle Cirsium spp. P. Mill. Asterales Asteraceae
stemless thistle Cirsium tioganum (Congd.) Petrak Asterales Asteraceae
wavyleaf thistle Cirsium undulatum (Nutt.) Spreng Asterales Asteraceae
Tracy's thistle Cirsium undulatum var. tracyi (Rydb.) S.L. Welsh Asterales Asteraceae
bull thistle Cirsium vulgare (Savi) Ten. Asterales Asteraceae
pinkfairies Clarkia pulchella Pursh Myrtales Onagraceae
heartleaf springbeauty Claytonia cordifolia S. Wats. Caryophyllales Portulacaceae
lanceleaf springbeauty Claytonia lanceolata Pall. ex Pursh Caryophyllales Portulacaceae
miner's lettuce Claytonia perfoliata ssp. perfoliata Donn ex Willd Caryophyllales Portulacaceae
western springbeauty Claytonia rosea Rydb. Caryophyllales Portulacaceae
springbeauty Claytonia spp. L. Caryophyllales Portulacaceae
narrowleaf spring-beauty Claytonia virginica L. Caryophyllales Portulacaceae
small spreading pogonia Cleistes bifaria (Fern.) Catling & Gregg Orchidales Orchidaceae
rock clematis Clematis columbiana (Nutt.) Torr. & Gray Ranunculales Ranunculaceae
hairy clematis Clematis hirsutissima Pursh Ranunculales Ranunculaceae
Scott's clematis Clematis hirsutissima var. scottii (Porter) Erickson Ranunculales Ranunculaceae
Jackman clematis Clematis x jackmanii T. Moore [lanuginosa × viticella] Ranunculales Ranunculaceae
spiderflower Cleome hassleriana Chod. Capparales Capparaceae
yellow spiderflower Cleome lutea Hook. Capparales Capparaceae
Rocky Mountain beeplant Cleome serrulata Pursh Capparales Capparaceae
spiderflower Cleome spinosa Jacq. Capparales Capparaceae
bluebead-lily Clintonia borealis (Ait.) Raf. Liliales Liliaceae
white clintonia Clintonia umbellulata (Michx.) Morong Liliales Liliaceae
bride's bonnet Clintonia uniflora (Menzies ex J.A. & J.H. Schultes) Kunth Liliales Liliaceae
butterfly pea Clitoria mariana L. Fabales Fabaceae (Leguminosae)
blessed thistle Cnicus benedictus L. Asterales Asteraceae
bullnettle Cnidoscolus stimulosus (Michx.) Engelm. & Gray Euphorbiales Euphorbiaceae
Texas bullnettle Cnidoscolus texanus (Müll. Arg.) Small Euphorbiales Euphorbiaceae
ivy gourd Coccinia grandis (L.) Voigt Violales Cucurbitaceae
orchid Codonorchis lessonii (Brogn.) Lindl. Orchidales Orchidaceae
maiden blue eyed mary Collinsia parviflora Lindl. Scrophulariales Scrophulariaceae
Blue Ridge horsebalm Collinsonia serotina Walt. Lamiales Lamiaceae
grand collomia Collomia grandiflora Douglas ex Lindl. Solanales Polemoniaceae
tiny trumpet Collomia linearis Nutt. Solanales Polemoniaceae
coco yam, wild taro Colocasia esculenta (L.) Schott Arales Araceae
bastard toadflax Comandra umbellata (L.) Nutt. Santalales Santalaceae
marsh cinquefoil Comarum palustre L. Rosales Rosaceae
Benghal dayflower Commelina benghalensis L. Commelinales Commelinaceae
Asiatic dayflower Commelina communis L. Commelinales Commelinaceae
spreading dayflower Commelina diffusa Burm. f. Commelinales Commelinaceae
dayflower Commelina spp. L. Commelinales Commelinaceae
sweetfern Comptonia peregrina (L.) Coult. Myricales Myricaceae
poison-hemlock Conium maculatum L. Apiales Apiaceae
blue mistflower Conoclinium coelestinum (L.) DC Asterales Asteraceae
American squawroot Conopholis americana (L.) Wallr. f. Scrophulariales Orobanchaceae
Oriental knight's-spur Consolida orientalis (J. Gay) Schroedinger Ranunculales Ranunculaceae
royal knight's-spur Consolida regalis Gray Ranunculales Ranunculaceae
European lily of the valley Convallaria majalis L. Liliales Liliaceae
mallow bindweed Convolvulus althaeoides L. Solanales Convolvulaceae
field bindweed Convolvulus arvensis L. Solanales Convolvulaceae
hairy fleabane Conyza bonariensis (L.) Cronquist Asterales Asteraceae
horseweed Conyza canadensis (L.) Cronq. Asterales Asteraceae
tall fleabane Conyza floribunda Kunth Asterales Asteraceae
dwarf fleabane Conyza ramosissima Cronquist Asterales Asteraceae
horseweeds Conyza spp. Less. Asterales Asteraceae
summer coralroot Corallorrhiza maculata (Raf.) Raf. Orchidales Orchidaceae
autumn coralroot Corallorrhiza odontorhiza (Willd.) Poir. Orchidales Orchidaceae
largeflower tickseed Coreopsis grandiflora Hogg ex Sweet Asterales Asteraceae
lanceleaf tickseed Coreopsis lanceolata L. Asterales Asteraceae
greater tickseed Coreopsis major Walt. Asterales Asteraceae
stiff tickseed Coreopsis palmata Nutt. Asterales Asteraceae
plains coreopsis Coreopsis tinctoria Nutt. Asterales Asteraceae
tall tickseed Coreopsis tripteris L. Asterales Asteraceae
whorled coreopsis Coreopsis verticillata L. Asterales Asteraceae
coriander Coriandrum sativum L. Apiales Apiaceae
bunchberry Cornus canadensis L. Cornales Cornaceae
lesser swinecress Coronopus didymus (L.) Sm. Capparales Brassicaceae
greater swinecress Coronopus squamatus (Forsk.) Aschers. Capparales Brassicaceae
scrambled eggs Corydalis aurea Willd. Papaverales Fumariaceae
spring fumewort Corydalis solida (L.) Clairv. Papaverales Fumariaceae
cosmos Cosmos spp. Cav. Asterales Asteraceae
sulphur cosmos Cosmos sulphureus Cav. Asterales Asteraceae
southern brassbuttons Cotula australis (Sieber) Hook. f. Asterales Asteraceae
brassbuttons Cotula coronopifolia L. Asterales Asteraceae
Mexican brassbuttons Cotula mexicana (DC.) Cabrera Asterales Asteraceae
Italian hawksbeard Crepis bursifolia L. Asterales Asteraceae
smooth hawksbeard Crepis capillaris (L.) Wallr Asterales Asteraceae
limestone hawksbeard Crepis intermedia Gray Asterales Asteraceae
fiddleleaf hawksbeard Crepis runcinata (James) Torr. & Gray Asterales Asteraceae
bristly hawksbeard Crepis setosa Haller f Asterales Asteraceae
narrowleaf hawksbeard Crepis tectorum L. Asterales Asteraceae
alkaliweed Cressa truxillensis Kunth Solanales Convolvulaceae
Chilean lanterntree Crinodendron hookerianum Gay Malvales Elaeocarpaceae
seven sisters swamplily Crinum americanum L. Liliales Liliaceae
crocosmia Crocosmia spp. Planch. Liliales Iridaceae
montbretia Crocosmia x crocosmiiflora (V. Lemoine) N.E. Br. [aurea × pottsii] Liliales Iridaceae
crocus Crocus heufelianus Herb. Liliales Iridaceae
crocus Crocus spp. L. Liliales Iridaceae
dutch crocus Crocus vernus (L.) Hill Liliales Iridaceae
goldenweed Croptilon divaricatum (Nutt.) Raf. Asterales Asteraceae
shakeshake Crotalaria incana L. Fabales Fabaceae (Leguminosae)
showy rattlebox Crotalaria spectabilis Roth Fabales Fabaceae (Leguminosae)
Alabama croton Croton alabamensis E.A. Sm. ex Chapman Euphorbiales Euphorbiaceae
woolly croton Croton capitatus Michx. Euphorbiales Euphorbiaceae
yellow balsam Croton flavens L. Euphorbiales Euphorbiaceae
vente conmigo Croton glandulosus L Euphorbiales Euphorbiaceae
tropic croton Croton glandulosus var. septentrionalis Müll. Arg. Euphorbiales Euphorbiaceae
Turkey mullein Croton setigerus Hook Euphorbiales Euphorbiaceae
smooth bedstraw Cruciata laevipes Opiz Rubiales Rubiaceae
common crupina Crupina vulgaris Cass. Asterales Asteraceae
miner's candle Cryptantha virgata (Porter) Payson Lamiales Boraginaceae
cantaloupe/honeydew Cucumis melo L Violales Cucurbitaceae
cucumber Cucumis sativus L. Violales Cucurbitaceae
buffalo gourd Cucurbita foetidissima Kunth Violales Cucurbitaceae
waxweed Cuphea spp. P. Br. Myrtales Lythraceae
American dodder Cuscuta americana L Solanales Cuscutaceae
smallseed alfalfa dodder Cuscuta approximata Bab. Solanales Cuscutaceae
canyon dodder Cuscuta ceanothi Behr Solanales Cuscutaceae
flax dodder Cuscuta epilinum Weihe Solanales Cuscutaceae
clover dodder Cuscuta epithymum (L.) L. Solanales Cuscutaceae
swamp dodder Cuscuta gronovii Willd. ex J.A. Schultes Solanales Cuscutaceae
largeseed dodder Cuscuta indecora Choisy Solanales Cuscutaceae
Japanese dodder Cuscuta japonica Choisy Solanales Cuscutaceae
field dodder Cuscuta pentagona Engelm Solanales Cuscutaceae
fiveangled dodder Cuscuta pentagona var. pentagona Engelm. Solanales Cuscutaceae
beaked dodder Cuscuta rostrata Shuttlw. ex Engelm. & Gray Solanales Cuscutaceae
giant sumpweed Cyclachaena xanthifolia (Nutt.) Fresen. Asterales Asteraceae
winged pigweed Cycloloma atriplicifolium (Spreng.) J.M. Coult. Caryophyllales Chenopodiaceae
wild celery Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P. Wilson Apiales Apiaceae
Kenilworth ivy Cymbalaria muralis P.G. Gaertn., B. Mey. & Scherb. Scrophulariales Scrophulariaceae
mountain springparsley Cymopterus montanus Nutt. ex Torr. & Gray Apiales Apiaceae
Rocky Mountain springparsley Cymopterus planosus (Osterhout) Mathias Apiales Apiaceae
honeyvine swallowwort Cynanchum laeve (Michx.) Pers. Gentianales Asclepiadaceae
black swallowwort Cynanchum louiseae Kartesz & Gandhi Gentianales Asclepiadaceae
European swallowwort Cynanchum rossicum (Kleopov) Barbarich Gentianales Asclepiadaceae
cardoon Cynara cardunculus L. Asterales Asteraceae
Pacific hound's tongue Cynoglossum grande Douglas ex Lehm. Lamiales Boraginaceae
houndstongue Cynoglossum officinale L. Lamiales Boraginaceae
globe sedge Cyperus croceus Vahl Cyperales Cyperaceae
pink lady's-slipper Cypripedium acaule Ait. Orchidales Orchidaceae
ram's head lady's slipper Cypripedium arietinum Ait. f. Orchidales Orchidaceae
Kentucky lady's slipper Cypripedium kentuckiense C.F. Reed Orchidales Orchidaceae
mountain lady's slipper Cypripedium montanum Dougl. ex Lindl. Orchidales Orchidaceae
yellow lady's slipper Cypripedium parviflorum Salisb. Orchidales Orchidaceae
small yellow lady' s slipper Cypripedium pubescens Willd. Orchidales Orchidaceae
showy lady's slipper Cypripedium reginae Walt. Orchidales Orchidaceae
lady's slippers Cypripedium spp. L. Orchidales Orchidaceae
fire lily Cyrtanthus spp. L. Asparagales Amaryllidaceae
spotted orchid Dactylorhiza incarnata (L.) Soo Orchidales Orchidaceae
Salep orchid Dactylorhiza incarnata ssp. incarnata Orchidales Orchidaceae
dahlia Dahlia spp. Cav. Asterales Asteraceae
purpletassels Dalea gattingeri (Heller) Barneby Fabales Fabaceae (Leguminosae)
mullein foxglove Dasistoma macrophylla (Nutt.) Raf. Scrophulariales Scrophulariaceae
sotol Dasylirion spp. Zucc. Liliales Liliaceae
angel's trumpet Datura innoxia Miller Solanales Solanaceae
Chinese thorn-apple Datura quercifolia Kunth Solanales Solanaceae
jimsonweed Datura stramonium L. Solanales Solanaceae
sacred thorn-apple Datura wrightii Regel Solanales Solanaceae
Queen Anne's lace, wild carrot Daucus carota L. Apiales Apiaceae
wild carrot Daucus carota ssp. carota L. Apiales Apiaceae
carrot Daucus carota ssp. sativus (Hoffm.) Arcang. Apiales Apiaceae
southwestern carrot Daucus pusillus Michx. Apiales Apiaceae
cape ivy Delairea odorata Lem Asterales Asteraceae
Alabama larkspur Delphinium alabamicum Kral Ranunculales Ranunculaceae
tall larkspur Delphinium barbeyi (Huth) Huth Ranunculales Ranunculaceae
Carolina larkspur Delphinium carolinianum Walt. Ranunculales Ranunculaceae
Carolina larkspur Delphinium carolinianum ssp. virescens (Nutt.) R.E. Brooks Ranunculales Ranunculaceae
low larkspur Delphinium nuttallianum Pritz. ex Walp. Ranunculales Ranunculaceae
mountain larkspur Delphinium ramosum Rydb. Ranunculales Ranunculaceae
larkspur Delphinium spp. L. Ranunculales Ranunculaceae
dwarf larkspur Delphinium tricorne Michx. Ranunculales Ranunculaceae
duncecap larkspur Delphinium x occidentale (S. Wats.) S. Wats. (pro sp.) [barbeyi × glaucum] Ranunculales Ranunculaceae
Sierra tansymustard Descurainia californica (Gray) O.E. Schulz Capparales Brassicaceae
mountain tansymustard Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn Capparales Brassicaceae
mountain tansymustard Descurainia incana ssp. incisa (Engelm. ex A. Gray) Kartesz & Gandhi Capparales Brassicaceae
pinnate tansymustard Descurainia pinnata (Walt.) Britt Capparales Brassicaceae
flixweed Descurainia sophia (L.) Webb ex Prantl Capparales Brassicaceae
northern tansymustard Descurainia sophioides (Fisch. ex Hook.) O.E. Schulz Capparales Brassicaceae
taique Desfontainia spinosa Ruiz & Pav. Gentianales Loganiaceae
Illinois bundleflower Desmanthus illinoensis (Michx.) MacM. ex B.L. Robins. & Fern. Fabales Fabaceae (Leguminosae)
showy ticktrefoil Desmodium canadense (L.) DC. Fabales Fabaceae (Leguminosae)
greenleaf ticktrefoil Desmodium intortum (Mill.) Urb. Fabales Fabaceae (Leguminosae)
smooth ticktrefoil Desmodium laevigatum (Nutt.) DC. Fabales Fabaceae (Leguminosae)
stiff ticktrefoil Desmodium obtusum (Muhl. ex Willd.) DC. Fabales Fabaceae (Leguminosae)
ticktrefoils Desmodium spp. Desv. Fabales Fabaceae (Leguminosae)
pinebarren ticktrefoil Desmodium strictum (Pursh) DC. Fabales Fabaceae (Leguminosae)
Florida beggarweed Desmodium tortuosum (Sw.) DC. Fabales Fabaceae (Leguminosae)
Deptford pink Dianthus armeria L. Caryophyllales Caryophyllaceae
carnation Dianthus caryophyllus L. Caryophyllales Caryophyllaceae
maiden pink Dianthus deltoides L. Caryophyllales Caryophyllaceae
cheddar pink Dianthus gratianapolitanus Caryophyllales Caryophyllaceae
carnation Dianthus spp. L. Caryophyllales Caryophyllaceae
squirrel corn Dicentra canadensis (Goldie) Walp. Papaverales Fumariaceae
dutchman's breeches Dicentra cucullaria (L.) Bernh. Papaverales Fumariaceae
turkey corn Dicentra eximia (Ker-Gawl.) Torr. Papaverales Fumariaceae
Carolina dichondra Dichondra carolinensis Michx. Solanales Convolvulaceae
Asian ponysfoot Dichondra micrantha Urb. Solanales Convolvulaceae
Old World forkedfern Dicranopteris linearis (Burm.) Underw. Polypodiales Gleicheniaceae
gasplant Dictamnus albus L Sapindales Rutaceae
foxglove Digitalis purpurea L. Scrophulariales Scrophulariaceae
digitalis Digitalis spp. L. Scrophulariales Scrophulariaceae
glandular Cape marigold Dimorphotheca sinuata DC. Asterales Asteraceae
poorjoe Diodia teres Walt. Rubiales Rubiaceae
Virginia buttonweed Diodia virginiana L Rubiales Rubiaceae
Venus flytrap Dionaea muscipula Ellis Nephenthales Droseraceae
winged yam Dioscorea alata L. Dioscoreales Dioscoreaceae
air-potato Dioscorea bulbifera L. Dioscoreales Dioscoreaceae
Chinese yam Dioscorea oppositifolia L. Dioscoreales Dioscoreaceae
fiveleaf yam Dioscorea pentaphylla L. Dioscoreales Dioscoreaceae
wild yam Dioscorea villosa L. Dioscoreales Dioscoreaceae
American umbrellaleaf Diphylleia cymosa Michx. Ranunculales Berberidaceae
wall rocket Diplotaxis tenuifolia (L.) DC. Capparales Brassicaceae
common teasel Dipsacus fullonum L. Dipsacales Dipsacaceae
Fuller's teasel Dipsacus fullonum sylvestris (Huds.) Clapham Dipsacales Dipsacaceae
cutleaf teasel Dipsacus laciniatus L. Dipsacales Dipsacaceae
Fuller's teasel Dipsacus sativus (L.) Honckeny Dipsacales Dipsacaceae
teasel Dipsacus spp. L. Dipsacales Dipsacaceae
yellow fairybells Disporum lanuginosum (Michx.) Nichols. Liliales Liliaceae
roughfruit fairybells Disporum trachycarpum (S. Wats.) Benth. & Hook. f. Liliales Liliaceae
stinkwort Dittrichia graveolens (L.) W. Greuter Asterales Asteraceae
Bonneville shootingstar Dodecatheon conjugens Greene Primulales Primulaceae
western arctic shootingstar Dodecatheon frigidum Cham. & Schltdl. Primulales Primulaceae
pride of Ohio Dodecatheon meadia L. Primulales Primulaceae
darkthroat shootingstar Dodecatheon pulchellum (Raf.) Merr. Primulales Primulaceae
shooting star Dodecatheon spp. L. Primulales Primulaceae
triangleleaf lipfern Doryopteris decipiens (Hook.) J. Sm. Polypodiales Pteridaceae
slender draba Draba albertina Greene Capparales Brassicaceae
golden draba Draba aurea Vahl ex Hornem Capparales Brassicaceae
snowbed draba Draba crassifolia Graham Capparales Brassicaceae
Austrian draba Draba fladnizensis Wulfen Capparales Brassicaceae
lancepod draba Draba lonchocarpa Rydb. Capparales Brassicaceae
showy draba Draba spectabilis Greene Capparales Brassicaceae
spring whitlowgrass Draba verna L. Capparales Brassicaceae
coneflower Dracopis spp. Cass. Asterales Asteraceae
showy dewflower Drosanthemum floribundum (Haw.) Schwant. Caryophyllales Aizoaceae
dwarf sundew Drosera brevifolia Pursh Nephenthales Droseraceae
pink sundew Drosera capillaris Poir. Nephenthales Droseraceae
threadleaf sundew Drosera filiformis Raf. Nephenthales Droseraceae
spoonleaf sundew Drosera intermedia Hayne Nephenthales Droseraceae
roundleaf sundew Drosera rotundifolia L. Nephenthales Droseraceae
white mountain-avens Dryas integrifolia Vahl Rosales Rosaceae
mountain dryas Dryas octopetala L. Rosales Rosaceae
alfombrilla Drymaria arenarioides Humboldt & Bonpland Caryophyllales Caryophyllaceae
heartleaf drymary Drymaria cordata (L.) Willd. ex J.A. Schultes Caryophyllales Caryophyllaceae
Indian mock-strawberry Duchesnea indica (Andr.) Focke Rosales Rosaceae
oblongleaf snakeherb Dyschoriste oblongifolia (Michx.) Kuntze Scrophulariales Acanthaceae
fetid marigold Dyssodia papposa (Vent.) A.S. Hitchc Asterales Asteraceae
purple coneflower Echinacea purpurea (L.) Moench Asterales Asteraceae
wavyleaf purple coneflower Echinacea simulata R.L. McGregor Asterales Asteraceae
coneflowers Echinacea spp. Moench Asterales Asteraceae
wild cucumber Echinocystis lobata (Michx.) Torr. & Gray Violales Cucurbitaceae
upright burhead Echinodorus berteroi (Spreng.) Fassett Cyperales Poaceae
creeping burhead Echinodorus cordifolius (L.) Griseb. Alismatales Alismataceae
southern globethistle Echinops ritro L. Asterales Asteraceae
great globethistle Echinops sphaerocephalus L. Asterales Asteraceae
pine echium Echium pininana Webb & Berthel. Lamiales Boraginaceae
salvation jane Echium plantagineum L. Lamiales Boraginaceae
blueweed Echium vulgare L. Lamiales Boraginaceae
eclipta Eclipta prostrata (L.) L. Asterales Asteraceae
Carolina elephantsfoot Elephantopus carolinianus Raeusch. Asterales Asteraceae
purple elephant's-foot Elephantopus nudatus Gray Asterales Asteraceae
elephantsfoot Elephantopus tomentosus L. Asterales Asteraceae
common elodea Elodea canadensis Michx Hydrocharitales Hydrocharitaceae
western elodea Elodea nuttallii (Planch.) H. St. John Hydrocharitales Hydrocharitaceae
crested latesummer mint Elsholtzia ciliata (Thunb.) Hyl. Lamiales Lamiaceae
three-cornered jack Emex australis Steinhall Polygonales Polygonaceae
spiny emex Emex spinosa (Linnaeus) Campdera Polygonales Polygonaceae
Cupid's-shaving-brush Emilia fosbergii D.H. Nicols. Asterales Asteraceae
winged encyclia Encyclia alata (Bateman) Schlecter Orchidales Orchidaceae
eastern false rue anemone Enemion biternatum Raf. Ranunculales Ranunculaceae
beechdrops Epifagus virginiana (L.) W. Bartram Scrophulariales Orobanchaceae
panicle willowherb Epilobium brachycarpum C. Presl Myrtales Onagraceae
fringed willowherb Epilobium ciliatum ssp. ciliatum Raf. Myrtales Onagraceae
hairy willowherb Epilobium hirsutum L. Myrtales Onagraceae
Epimedium Epimedium x rubrum [alpinum X grandiflorum] Ranunculales Berberidaceae
field horsetail Equisetum arvense L Equisetales Equisetaceae
scouringrush Equisetum hyemale L Equisetales Equisetaceae
smooth horsetail Equisetum laevigatum A. Braun Equisetales Equisetaceae
marsh horsetail Equisetum palustre L. Equisetales Equisetaceae
horsetail Equisetum spp. L. Equisetales Equisetaceae
giant horsetail Equisetum telmateia Ehrh. Equisetales Equisetaceae
winter aconite Eranthis hyemalis (L.) Salisb. Ranunculales Ranunculaceae
cutleaf burnweed Erechtites glomerata (Desf. ex Poir.) DC. Asterales Asteraceae
American burnweed Erechtites hieraciifolia (L.) Raf. ex DC. Asterales Asteraceae
Australian burnweed Erechtites minima (Poir.) DC Asterales Asteraceae
desert fivespot Eremalche rotundifolia (Gray) Greene Malvales Malvaceae
bitter fleabane Erigeron acris L. Asterales Asteraceae
annual fleabane Erigeron annuus (L.) Pers Asterales Asteraceae
bellorita Erigeron bellioides DC. Asterales Asteraceae
scabland fleabane Erigeron bloomeri Gray Asterales Asteraceae
running fleabane Erigeron colomexicanus A. Nels. Asterales Asteraceae
cutleaf daisy Erigeron compositus Pursh Asterales Asteraceae
large mountain fleabane Erigeron coulteri Porter Asterales Asteraceae
Eaton's fleabane Erigeron eatonii Gray Asterales Asteraceae
tall fleabane Erigeron elatior (Gray) Greene Asterales Asteraceae
sprucefir fleabane Erigeron eximius Greene Asterales Asteraceae
trailing fleabane Erigeron flagellaris Gray Asterales Asteraceae
beautiful fleabane Erigeron formosissimus Greene Asterales Asteraceae
streamside fleabane Erigeron glabellus Nutt. Asterales Asteraceae
Latin American fleabane Erigeron karvinskianus DC Asterales Asteraceae
rockslide yellow fleabane Erigeron leiomerus Gray Asterales Asteraceae
shortray fleabane Erigeron lonchophyllus Hook. Asterales Asteraceae
blackhead fleabane Erigeron melanocephalus (A. Nels.) A. Nels. Asterales Asteraceae
subalpine fleabane Erigeron peregrinus (Banks ex Pursh) Greene Asterales Asteraceae
Philadelphia fleabane Erigeron philadelphicus L Asterales Asteraceae
featherleaf fleabane Erigeron pinnatisectus (Gray) A. Nels. Asterales Asteraceae
shaggy fleabane Erigeron pumilus Nutt. Asterales Asteraceae
onestem fleabane Erigeron simplex Green Asterales Asteraceae
Oregon fleabane Erigeron speciosus (Lindl.) DC. Asterales Asteraceae
fleabanes Erigeron spp. L. Asterales Asteraceae
rough fleabane Erigeron strigosus Muhl. ex Willd. Asterales Asteraceae
threenerve fleabane Erigeron subtrinervis Rydb. ex Porter & Britton Asterales Asteraceae
early bluetop fleabane Erigeron vetensis Rydb. Asterales Asteraceae
tenangle pipewort Eriocaulon decangulare L. Eriocaulales Eriocaulaceae
winged buckwheat Eriogonum alatum Torr. Polygonales Polygonaceae
arrowleaf buckwheat Eriogonum compositum Dougl. ex Benth. Polygonales Polygonaceae
parsnipflower buckwheat Eriogonum heracleoides Nutt. Polygonales Polygonaceae
James' buckwheat Eriogonum jamesii Benth. Polygonales Polygonaceae
sulphur-flower buckwheat Eriogonum umbellatum Torr. Polygonales Polygonaceae
sulphur-flower buckwheat Eriogonum umbellatum var. majus Hook. Polygonales Polygonaceae
common woolly sunflower Eriophyllum lanatum (Pursh) Forbes Asterales Asteraceae
arctic alpine forget-me-not Eritrichium nanum aretioides (Cham.) Herder Lamiales Boraginaceae
arctic alpine forget-me-not Eritrichium nanum var. aretioides (Cham.) Herder Lamiales Boraginaceae
redstem filaree Erodium cicutarium (L.) L'Hér. ex Ait. Geraniales Geraniaceae
redstem stork's bill Erodium cicutarium ssp. cicutarium (L.) L'Hér. ex Aiton Geraniales Geraniaceae
whitestem filaree Erodium moschatum (L.) L'Hér. ex Aiton Geraniales Geraniaceae
stork's bill Erodium spp. L'Hér. ex Aiton Geraniales Geraniaceae
rocketsalad Eruca vesicaria ssp. sativa (P. Mill.) Thellung Capparales Brassicaceae
amethyst eryngo Eryngium amethystinum L. Apiales Apiaceae
field eryngo Eryngium campestre L. Apiales Apiaceae
creeping eryngo Eryngium prostratum Nutt. ex DC. Apiales Apiaceae
button snakeroot Eryngium yuccifolium Michx. Apiales Apiaceae
Western wallflower Erysimum asperum (Nutt.) DC. Capparales Brassicaceae
sanddune wallflower Erysimum capitatum (Dougl. ex Hook.) Greene Capparales Brassicaceae
sanddune wallflower Erysimum capitatum var. capitatum (Douglas ex Hook.) Greene Capparales Brassicaceae
Pursh's wallflower Erysimum capitatum var. purshii (Durand) Rollins Capparales Brassicaceae
wallflower mustard Erysimum cheiranthoides L Capparales Brassicaceae
bushy wallflower Erysimum repandum L Capparales Brassicaceae
wallflower Erysimum spp. L. Capparales Brassicaceae
eastern coralbean Erythrina herbacea L. Fabales Fabaceae (Leguminosae)
white trout lily Erythronium albidum Nutt. Liliales Liliaceae
yellow trout lily Erythronium americanum Ker-Gawl. Liliales Liliaceae
yellow avalanche-lily Erythronium grandiflorum Pursh Liliales Liliaceae
Minnesota trout lily Erythronium propullans Gray Liliales Liliaceae
California poppy Eschscholzia californica Cham Papaverales Papaveraceae
torch-ginger Etlingera elatior (Jack) R.M. Sm. Zingiberales Zingiberaceae
Engelmann's aster Eucephalus engelmannii (D.C. Eat.) Greene Asterales Asteraceae
spotted joe pye weed Eupatoriadelphus maculatus (L.) King & H. Rob. Asterales Asteraceae
dogfennel Eupatorium capillifolium (Lam.) Small Asterales Asteraceae
yankeeweed Eupatorium compositifolium Walt. Asterales Asteraceae
trumpetweed Eupatorium fistulosum Barratt Asterales Asteraceae
justiceweed Eupatorium leucolepis (DC.) Torr. & Gray Asterales Asteraceae
boneset Eupatorium perfoliatum L. Asterales Asteraceae
late boneset Eupatorium serotinum Michx. Asterales Asteraceae
wood spurge Euphorbia amygdaloides L. Euphorbiales Euphorbiaceae
candelilla Euphorbia antisyphilitica Zucc. Euphorbiales Euphorbiaceae
horned spurge Euphorbia brachycera Engelm. Euphorbiales Euphorbiaceae
flowering spurge Euphorbia corollata L. Euphorbiales Euphorbiaceae
painted poinsettia Euphorbia cyathophora Murr Euphorbiales Euphorbiaceae
cypress spurge Euphorbia cyparissias L. Euphorbiales Euphorbiaceae
toothed spurge Euphorbia dentata Michx Euphorbiales Euphorbiaceae
toothed spurge Euphorbia dentata var. dentata Michx. Euphorbiales Euphorbiaceae
cushion spurge Euphorbia epithymoides L. Euphorbiales Euphorbiaceae
leafy spurge Euphorbia esula L. Euphorbiales Euphorbiaceae
sun spurge Euphorbia helioscopia L. Euphorbiales Euphorbiaceae
wild poinsettia Euphorbia heterophylla L Euphorbiales Euphorbiaceae
snow-on-the-mountain Euphorbia marginata Pursh Euphorbiales Euphorbiaceae
myrtle spurge Euphorbia myrsinites L Euphorbiales Euphorbiaceae
petty spurge Euphorbia peplus L. Euphorbiales Euphorbiaceae
false flowering spurge Euphorbia pubentissima Michx. Euphorbiales Euphorbiaceae
spurge Euphorbia seguieriana Neck. Euphorbiales Euphorbiaceae
Geraldton carnation weed Euphorbia terracina L. Euphorbiales Euphorbiaceae
eastern showy aster Eurybia conspicua (Lindl.) G.L. Nesom Asterales Asteraceae
flat-top goldentop Euthamia graminifolia var. graminifolia (L.) Nutt. Asterales Asteraceae
slender goldenrod Euthamia tenuifolia (Pursh) Nutt. Asterales Asteraceae
buckwheat Fagopyrum esculentum Moench Polygonales Polygonaceae
mulberryweed Fatoua villosa (Thunb.) Nakai Urticales Moraceae
clusterflower Flaveria trinervia (Spreng.) C. Mohr Asterales Asteraceae
fennel Foeniculum vulgare P. Mill. Apiales Apiaceae
strawberry Fragaria spp. L. Rosales Rosaceae
woodland strawberry Fragaria vesca L. Rosales Rosaceae
woodland strawberry Fragaria vesca ssp. bracteata (A. Heller) Staudt Rosales Rosaceae
wild strawberry Fragaria virginiana Duchesne Rosales Rosaceae
Virginia strawberry Fragaria virginiana ssp. glauca (S. Watson) Staudt Rosales Rosaceae
strawberry Fragaria x ananassa Duchesne ex Rozier [chiloensis × virginiana] Rosales Rosaceae
elkweed Frasera speciosa Dougl. ex Griseb. Gentianales Gentianaceae
spotted fritillary Fritillaria atropurpurea Nutt. Liliales Liliaceae
Kamchatka fritillary Fritillaria camschatcensis (L.) Ker Gawl. Liliales Liliaceae
plains snakecotton Froelichia floridana (Nutt.) Moq. Caryophyllales Amaranthaceae
slender snakecotton Froelichia gracilis (Hook.) Moq. Caryophyllales Amaranthaceae
white ramping fumitory Fumaria capreolata L. Papaverales Fumariaceae
drug fumitory Fumaria officinalis L. Papaverales Fumariaceae
wavyleaf twinevine Funastrum crispum (Benth.) Schltr. Gentianales Asclepiadaceae
lanceleaf blanketflower Gaillardia aestivalis (Walt.) H. Rock Asterales Asteraceae
yellow lanceleaf blanketflower Gaillardia aestivalis var. flavovirens (C. Mohr) Cronquist Asterales Asteraceae
blanketflower Gaillardia aristata Pursh Asterales Asteraceae
rosering gaillardia Gaillardia pulchella Foug. Asterales Asteraceae
blanketflower Gaillardia spp. Foug. Asterales Asteraceae
downy milkpea Galactia volubilis (L.) Britt. Fabales Fabaceae (Leguminosae)
snowdrop Galanthus nivalis L. Liliales Liliaceae
beetleweed Galax urceolata (Poir.) Brummitt Diapensiales Diapensiaceae
showy orchid Galearis spectabilis (L.) Raf. Orchidales Orchidaceae
goatsrue Galega officinalis L. Fabales Fabaceae (Leguminosae)
hempnettle Galeopsis pubescens Besser Lamiales Lamiaceae
Edmonton hempnettle Galeopsis speciosa Mill. Lamiales Lamiaceae
hempnettle Galeopsis spp. Lamiales Lamiaceae
common hempnettle Galeopsis tetrahit L. Lamiales Lamiaceae
smallflower galinsoga Galinsoga parviflora Cav. Asterales Asteraceae
hairy galinsoga Galinsoga quadriradiata Cav Asterales Asteraceae
catchweed bedstraw Galium aparine L Rubiales Rubiaceae
twinleaf bedstraw Galium bifolium S. Wats. Rubiales Rubiaceae
northern bedstraw Galium boreale L. Rubiales Rubiaceae
coastal bedstraw Galium hispidulum Michx. Rubiales Rubiaceae
smooth bedstraw Galium mollugo L. Rubiales Rubiaceae
bedstraws Galium spp. L. Rubiales Rubiaceae
threepetal bedstraw Galium trifidum L. Rubiales Rubiaceae
fragrant bedstraw Galium triflorum Michx. Rubiales Rubiaceae
yellow bedstraw Galium verum L. Rubiales Rubiaceae
purple cudweed Gamochaeta purpurea (L.) Cabrera Asterales Asteraceae
wintergreen Gaultheria procumbens L. Ericales Ericaceae
biennial gaura Gaura biennis L. Myrtales Onagraceae
scarlet gaura Gaura coccinea Nutt. ex Pursh Myrtales Onagraceae
Drummond's beeblossom Gaura drummondii (Spach) Torr. & Gray Myrtales Onagraceae
velvetweed Gaura mollis James Myrtales Onagraceae
wavyleaf gaura Gaura sinuata Nutt. ex Ser Myrtales Onagraceae
dwarf huckleberry Gaylussacia dumosa (Andr.) Torr. & Gray Ericales Ericaceae
blue huckleberry Gaylussacia frondosa (L.) Torr. & Gray ex Torr. Ericales Ericaceae
pleated gentian Gentiana affinis Griseb. Gentianales Gentianaceae
whitish gentian Gentiana algida Pallas Gentianales Gentianaceae
willow gentain Gentiana asclepiadea L. Gentianales Gentianaceae
gentian Gentiana brachyphylla Vill. Gentianales Gentianaceae
Rainier pleated gentian Gentiana calycosa Griseb. Gentianales Gentianaceae
Elliott's gentian Gentiana catesbaei Walt. Gentianales Gentianaceae
Parry's gentian Gentiana parryi Engelm. Gentianales Gentianaceae
harvestbells Gentiana saponaria L. Gentianales Gentianaceae
striped gentian Gentiana villosa L. Gentianales Gentianaceae
autumn dwarf gentian Gentianella amarella ssp. acuta (Michx.) J.M. Gillett Gentianales Gentianaceae
Dane's dwarf gentian Gentianella tenella (Rottb.) Böerner Gentianales Gentianaceae
greater fringed gentian Gentianopsis crinita (Froel.) Ma Gentianales Gentianaceae
windmill fringed gentian Gentianopsis detonsa ssp. detonsa (Rottb.) Ma Gentianales Gentianaceae
Rocky Mountain fringed gentian Gentianopsis thermalis Kuntze) Iltis Gentianales Gentianaceae
pineywoods geranium Geranium caespitosum James Geraniales Geraniaceae
pineywoods geranium Geranium caespitosum var. caespitosum James Geraniales Geraniaceae
Carolina geranium Geranium carolinianum L. Geraniales Geraniaceae
cutleaf geranium Geranium dissectum L. Geraniales Geraniaceae
shining geranium Geranium lucidum L. Geraniales Geraniaceae
wild geranium Geranium maculatum L. Geraniales Geraniaceae
hedgerow geranium Geranium pyrenaicum Burm. f. Geraniales Geraniaceae
Richardson's geranium Geranium richardsonii Fisch. & Trautv. Geraniales Geraniaceae
herb-robert Geranium robertianum L. Geraniales Geraniaceae
bloody geranium Geranium sanguineum L. Geraniales Geraniaceae
geranium Geranium spp. L. Geraniales Geraniaceae
Thunberg's geranium Geranium thunbergii Sieb. & Zucc. ex Lindl. & Paxton Geraniales Geraniaceae
sticky purple geranium Geranium viscosissimum Fisch. & C.A. Mey. ex C.A. Mey. Geraniales Geraniaceae
geranium Geranium x cantabrigiense [dalmaticum x macrorrhizum] Geraniales Geraniaceae
Transvaal daisy Gerbera spp. Gmel. Asterales Asteraceae
yellow avens Geum aleppicum Jacq. Rosales Rosaceae
white avens Geum canadense Jacq. Rosales Rosaceae
geum Geum coccineum Sm. Rosales Rosaceae
largeleaf avens Geum macrophyllum Willd. Rosales Rosaceae
purple avens Geum rivale L. Rosales Rosaceae
Ross' avens Geum rossii (R. Br.) Ser. Rosales Rosaceae
old man's whiskers Geum triflorum Pursh Rosales Rosaceae
old man's whiskers Geum triflorum var. triflorum Pursh Rosales Rosaceae
herb bennet Geum urbanum L. Rosales Rosaceae
dotted bridalveil Gibasis pellucida (Mart. & Gal.) D.R. Hunt Commelinales Commelinaceae
sticky gilia Gilia pinnatifida Nutt. ex Gray Solanales Polemoniaceae
Bowman's root Gillenia trifoliata (L.) Moench Rosales Rosaceae
Dakota vervain Glandularia bipinnatifida (Nutt.) Nutt. Lamiales Verbenaceae
Dakota mock vervain Glandularia bipinnatifida var. ciliata (Benth.) B.L. Turner Lamiales Verbenaceae
rose vervain Glandularia canadensis (L.) Nutt. Lamiales Verbenaceae
moss vervain Glandularia pulchella (Sweet) Troncoso Lamiales Verbenaceae
yellow hornpoppy Glaucium flavum Crantz Papaverales Papaveraceae
ground ivy Glechoma hederacea L. Lamiales Lamiaceae
flame lily Gloriosa superba L. Liliales Liliaceae
soybean Glycine max (L.) Merr. Fabales Fabaceae (Leguminosae)
wild licorice Glycyrrhiza lepidota Pursh Fabales Fabaceae (Leguminosae)
slender cudweed Gnaphalium exilifolium A. Nels. Asterales Asteraceae
western marsh cudweed Gnaphalium palustre Nutt. Asterales Asteraceae
low cudweed Gnaphalium uliginosum L. Asterales Asteraceae
common globe amaranth Gomphrena globosa L. Caryophyllales Amaranthaceae
prostrate globe-amaranth Gomphrena serrata L. Caryophyllales Amaranthaceae
western rattlesnake plantain Goodyera oblongifolia Raf. Orchidales Orchidaceae
downy rattlesnake plantain Goodyera pubescens (Willd.) R. Br. ex Ait. f. Orchidales Orchidaceae
Great Valley gumweed Grindelia camporum var. camporum Greene Asterales Asteraceae
Spanish gold Grindelia papposa Nesom & Suh Asterales Asteraceae
curlycup gumweed Grindelia squarrosa (Pursh) Dunal Asterales Asteraceae
curlycup gumweed Grindelia squarrosa var. serrulata (Rydb.) Steyerm. Asterales Asteraceae
subalpine gumweed Grindelia subalpina Greene Asterales Asteraceae
broom snakeweed Gutierrezia sarothrae (Pursh) Britt. & Rusby Asterales Asteraceae
babysbreath Gypsophila paniculata L Caryophyllales Caryophyllaceae
waterspider bog orchid Habenaria repens Nutt. Orchidales Orchidaceae
western stickseed Hackelia floribunda (Lehm.) I.M. Johnston Lamiales Boraginaceae
Jessica sticktight Hackelia micrantha (Eastw.) J.L. Gentry Lamiales Boraginaceae
halogeton Halogeton glomeratus (Bieb.) C.A. Mey. Caryophyllales Chenopodiaceae
mescalito Hechtia montana Brandegee Bromeliales Bromeliaceae
white garland-lily Hedychium coronarium Koenig Zingiberales Zingiberaceae
Kahila garland-lily Hedychium gardnerianum Shepard ex Ker-Gawl. Zingiberales Zingiberaceae
boreal sweetvetch Hedysarum boreale Nutt. Fabales Fabaceae (Leguminosae)
western sweetvetch Hedysarum occidentale Greene Fabales Fabaceae (Leguminosae)
bitter sneezeweed Helenium amarum (Raf.) H. Rock Asterales Asteraceae
common sneezeweed Helenium autumnale L. Asterales Asteraceae
Parry's dwarf-sunflower Helianthella parryi Gray Asterales Asteraceae
fivenerve helianthella Helianthella quinquenervis (Hook.) Gray Asterales Asteraceae
oneflower helianthella Helianthella uniflora (Nutt.) Torr. & A. Gray Asterales Asteraceae
swamp sunflower Helianthus angustifolius L. Asterales Asteraceae
common sunflower Helianthus annuus L. Asterales Asteraceae
woodland sunflower Helianthus divaricatus L. Asterales Asteraceae
hairy sunflower Helianthus hirsutus Raf. Asterales Asteraceae
Maximilian sunflower Helianthus maximiliani Schrad. Asterales Asteraceae
Nuttall's sunflower Helianthus nuttallii Torr. & Gray Asterales Asteraceae
fewleaf sunflower Helianthus occidentalis Riddell Asterales Asteraceae
prairie sunflower Helianthus petiolaris Nutt. Asterales Asteraceae
rayless sunflower Helianthus radula (Pursh) Torr. & Gray Asterales Asteraceae
Schweinitz's sunflower Helianthus schweinitzii Torr. & A. Gray Asterales Asteraceae
sunflower Helianthus spp. L. Asterales Asteraceae
Jerusalem artichoke Helianthus tuberosus L. Asterales Asteraceae
oxeye Heliopsis helianthoides (L.) Sweet Asterales Asteraceae
smooth oxeye Heliopsis helianthoides var. scabra (Dunal) Fern. Asterales Asteraceae
clasping heliotrope Heliotropium amplexicaule L. Lamiales Boraginaceae
seaside heliotrope Heliotropium curassavicum L. Lamiales Boraginaceae
European heliotrope Heliotropium europaeum L. Lamiales Boraginaceae
Indian heliotrope Heliotropium indicum L. Lamiales Boraginaceae
green hellebore Helleborus viridis L. Ranunculales Ranunculaceae
tawny daylily Hemerocallis fulva (L.) L. Liliales Liliaceae
daylily Hemerocallis spp. L. Liliales Liliaceae
Fitch's tarweed Hemizonia fitchii A. Gray Asterales Asteraceae
Kellogg's tarweed Hemizonia kelloggii Greene Asterales Asteraceae
threeray tarweed Hemizonia lobbii Greene Asterales Asteraceae
hepatica Hepatica nobilis Schreb. Ranunculales Ranunculaceae
sharp-lobed hepatica Hepatica nobilis var. acuta (Pursh) Steyerm. Ranunculales Ranunculaceae
round-lobed hepatica Hepatica nobilis var. obtusa (Pursh) Steyerm. Ranunculales Ranunculaceae
giant hogweed Heracleum mantegazzianum Sommier & Levier Apiales Apiaceae
common cowparsnip Heracleum maximum Bartr. Apiales Apiaceae
eltrot Heracleum sphondylium L. Apiales Apiaceae
damesrocket Hesperis matronalis L. Capparales Brassicaceae
rocket Hesperis spp. L. Capparales Brassicaceae
dwarf hesperochiron Hesperochiron pumilus (Dougl. ex Griseb.) Porter Solanales Hydrophyllaceae
ducksalad Heteranthera limosa (Sw.) Willd. Liliales Pontederiaceae
roundleaf mudplantain Heteranthera reniformis Ruiz & Pavón Liliales Pontederiaceae
rockyscree false goldenaster Heterotheca fulcrata (Greene) Shinners Asterales Asteraceae
telegraphplant Heterotheca grandiflora Nutt. Asterales Asteraceae
camphorweed Heterotheca subaxillaris (Lam.) Britt. & Rusby Asterales Asteraceae
hairy false goldenaster Heterotheca villosa (Pursh) Shinners Asterales Asteraceae
hairy false goldenaster Heterotheca villosa var. villosa (Pursh) Shinners Asterales Asteraceae
roundleaf alumroot Heuchera cylindrica Dougl. ex Hook. Rosales Saxifragaceae
littleflower alumroot Heuchera parviflora Bartl. Rosales Saxifragaceae
coralbells Heuchera sanguinea Engelm. Rosales Saxifragaceae
spiked crested coralroot Hexalectris spicata (Walt.) Barnh. Orchidales Orchidaceae
little brown jug Hexastylis arifolia (Michx.) Small Aristolochiales Aristolochiaceae
largeflower heartleaf Hexastylis shuttleworthii var. harperi Gaddy Aristolochiales Aristolochiaceae
Harper's heartleaf Hexastylis speciosa Harper Aristolochiales Aristolochiaceae
comfortroot Hibiscus aculeatus Walt. Malvales Malvaceae
kenaf Hibiscus cannabinus L. Malvales Malvaceae
scarlet rosemallow Hibiscus coccineus Walt. Malvales Malvaceae
halberdleaf rosemallow Hibiscus laevis All. Malvales Malvaceae
hibiscus Hibiscus lunariifolius Willd. Malvales Malvaceae
crimsoneyed rosemallow Hibiscus moscheutos L. Malvales Malvaceae
hibiscus Hibiscus spp. L. Malvales Malvaceae
Venice mallow Hibiscus trionum L. Malvales Malvaceae
white hawkweed Hieracium albiflorum Hook. Asterales Asteraceae
orange hawkweed Hieracium aurantiacum L. Asterales Asteraceae
meadow hawkweed Hieracium caespitosum Dumort. Asterales Asteraceae
slender hawkweed Hieracium gracile Hook. Asterales Asteraceae
gronovius hawkweed Hieracium gronovii L. Asterales Asteraceae
mouseear hawkweed Hieracium pilosella L. Asterales Asteraceae
mouseear hawkweed Hieracium pilosella var. niveum Müll. Arg. Asterales Asteraceae
hawkweeds Hieracium spp. L. Asterales Asteraceae
hippocrepis Hippocrepis emerus (L.) Lassen Fabales Fabaceae (Leguminosae)
marestail Hippuris vulgaris L. Callitrichales Hippuridaceae
shortpod mustard Hirschfeldia incana (L.) Lagrèze-Fossat Capparales Brassicaceae
virgate tarweed Holocarpha virgata (A. Gray) D.D. Keck Asterales Asteraceae
umbrella spurry Holosteum umbellatum L. Caryophyllales Caryophyllaceae
cape tulip Homeria spp. Vent. Liliales Iridaceae
pinewoods horkelia Horkelia fusca Lindl. Rosales Rosaceae
prostrate hutchinsia Hornungia procumbens (L.) Hayek Capparales Brassicaceae
hosta Hosta spp. Tratt. Liliales Liliaceae
bluets Houstonia caerulea L. Rubiales Rubiaceae
roundleaf bluet Houstonia procumbens (Walt. ex J.F. Gmel.) Standl. Rubiales Rubiaceae
tiny bluet Houstonia pusilla Schoepf Rubiales Rubiaceae
bluet Houstonia spp. L. Rubiales Rubiaceae
Japanese hop Humulus japonicus Siebold & Zucc. Urticales Cannabaceae
goldenseal Hydrastis canadensis L. Ranunculales Ranunculaceae
hydrilla Hydrilla verticillata (L. f.) Royle Hydrocharitales Hydrocharitaceae
common frogbit Hydrocharis morsus-ranae L. Hydrocharitales Hydrocharitaceae
floating pennywort Hydrocotyle ranunculoides L. f. Apiales Apiaceae
lawn pennywort Hydrocotyle sibthorpioides Lam. Apiales Apiaceae
water pennywort Hydrocotyle spp. L. Apiales Apiaceae
water pennywort Hydrocotyle umbellata L. Apiales Apiaceae
waterpod Hydrolea quadrivalvis Walter Solanales Hydrophyllaceae
ballhead waterleaf Hydrophyllum capitatum Dougl. ex Benth. Solanales Hydrophyllaceae
Fendler's waterleaf Hydrophyllum fendleri (Gray) Heller Solanales Hydrophyllaceae
yerba de hicotea Hygrophila costata Nees Scrophulariales Acanthaceae
miramar weed Hygrophila polysperma (Roxb.) T. Anders. Scrophulariales Acanthaceae
nightblooming cactus Hylocereus undatus (Haw.) Britt. & Rose Caryophyllales Cactaceae
showy stonecrop Hylotelephium spectabile (Boreau) H. Ohba Rosales Crassulaceae
stonecrop Hylotelephium spp. H. Ohba Rosales Crassulaceae
live-forever stonecrop Hylotelephium telephium (L.) H. Ohba Rosales Crassulaceae
Carolina spiderlily Hymenocallis caroliniana (L.) Herbert Liliales Liliaceae
spiderlily Hymenocallis spp. Salisb. Liliales Liliaceae
fineleaf hymenopappus Hymenopappus filifolius Hook. Asterales Asteraceae
Newberry's hymenopappus Hymenopappus newberryi Gray) I.M. Johnston Asterales Asteraceae
orange sneezeweed Hymenoxys hoopesii (Gray) Bierner Asterales Asteraceae
pingue rubberweed Hymenoxys richardsonii (Hook.) Cockerell Asterales Asteraceae
black henbane Hyoscyamus niger L. Solanales Solanaceae
Warty St. John's wort Hypericum balearicum L. Theales Clusiaceae
roundpod St. Johnswort Hypericum cistifolium Lam. Theales Clusiaceae
St. Peterswort Hypericum crux-andreae (L.) Crantz Theales Clusiaceae
pineweed Hypericum gentianoides (L.) B.S.P. Theales Clusiaceae
St. Andrew's cross Hypericum hypericoides (L.) Crantz Theales Clusiaceae
dwarf St. Johnswort Hypericum mutilum L. Theales Clusiaceae
early St. Johnswort Hypericum nudiflorum Michx. ex Willd. Theales Clusiaceae
common St. Johnswort Hypericum perforatum L. Theales Clusiaceae
spotted St. Johnswort Hypericum punctatum Lam. Theales Clusiaceae
roundseed St. Johnswort Hypericum sphaerocarpum Michx. Theales Clusiaceae
St. Johnswort Hypericum spp. L. Theales Clusiaceae
smooth cat's ear Hypochaeris glabra L. Asterales Asteraceae
hairy cat'sear Hypochaeris radicata L. Asterales Asteraceae
common yellowstar Hypoxis hirsuta (L.) Coville Liliales Liliaceae
evergreen candytuft Iberis sempervirens L. Capparales Brassicaceae
yellow unicorn-plant Ibicella lutea (Lindl.) Van Eselt. Scrophulariales Pedaliaceae
streambank wild hollyhock Iliamna rivularis (Dougl. ex Hook.) Greene Malvales Malvaceae
jewelweed Impatiens capensis Meerb. Geraniales Balsaminaceae
ornamental jewelweed Impatiens glandulifera Royle Geraniales Balsaminaceae
western touch-me-not Impatiens noli-tangere L. Geraniales Balsaminaceae
pale touch-me-not Impatiens pallida Nutt. Geraniales Balsaminaceae
small flower touch-me-not Impatiens parviflora DC. Geraniales Balsaminaceae
touch-me-not Impatiens spp. L. Geraniales Balsaminaceae
Double Impatiens Impatiens walleriana Hook. f. Geraniales Balsaminaceae
British yellowhead Inula britannica L. Asterales Asteraceae
sweetpotato Ipomoea batatas (L.) Lam. Solanales Convolvulaceae
red morningglory Ipomoea coccinea L. Solanales Convolvulaceae
sharppod morningglory Ipomoea cordatotriloba Dennst. Solanales Convolvulaceae
tievine Ipomoea cordatotriloba var. cordatotriloba Dennst. Solanales Convolvulaceae
ivyleaf morningglory Ipomoea hederacea Jacq. Solanales Convolvulaceae
beach morning-glory Ipomoea imperati (Vahl) Griseb. Solanales Convolvulaceae
pitted morningglory Ipomoea lacunosa L. Solanales Convolvulaceae
bush morning-glory Ipomoea leptophylla Torr. Solanales Convolvulaceae
Japanese morningglory Ipomoea nil (L.) Roth Solanales Convolvulaceae
bigroot morningglory Ipomoea pandurata (L.) G.F.W. Mey. Solanales Convolvulaceae
tall morningglory Ipomoea purpurea (L.) Roth Solanales Convolvulaceae
cypressvine morningglory Ipomoea quamoclit L. Solanales Convolvulaceae
morningglory Ipomoea spp. L. Solanales Convolvulaceae
threelobe morningglory Ipomoea triloba L. Solanales Convolvulaceae
Hawaii morningglory Ipomoea tuboides O. Deg. & van Ooststr. Solanales Convolvulaceae
purple moonflower Ipomoea turbinata Lag. Solanales Convolvulaceae
palmleaf morningglory Ipomoea wrightii Gray Solanales Convolvulaceae
scarlet gilia Ipomopsis aggregata (Pursh) V. Grant Solanales Polemoniaceae
standing-cypress Ipomopsis rubra (L.) Wherry Solanales Polemoniaceae
slendertube skyrocket Ipomopsis tenuituba (Rydb.) V.E. Grant Solanales Polemoniaceae
dwarf crested iris Iris cristata Ait. Liliales Iridaceae
Douglas iris Iris douglasiana Herbert Liliales Iridaceae
Russian iris Iris ensata Thunb. Liliales Iridaceae
copper iris Iris fulva Ker-Gawl. Liliales Iridaceae
Rocky Mountain iris Iris missouriensis Nutt. Liliales Iridaceae
sweet iris Iris pallida Lam. Liliales Iridaceae
yellowflag iris Iris pseudacorus L. Liliales Iridaceae
Siberian iris Iris sibirica L. Liliales Iridaceae
iris Iris spp. L. Liliales Iridaceae
dwarf violet iris Iris verna L. Liliales Iridaceae
dwarf violet iris Iris verna var. smalliana Fernald ex M.E. Edwards Liliales Iridaceae
blueflag iris Iris versicolor L. Liliales Iridaceae
Virginia iris Iris virginica L. Liliales Iridaceae
Dyer's woad Isatis tinctoria L. Capparales Brassicaceae
green fiveleaf orchid Isotria medeoloides (Pursh) Raf. Orchidales Orchidaceae
purple fiveleaf orchid Isotria verticillata Raf. Orchidales Orchidaceae
annual marshelder Iva annua L. Asterales Asteraceae
poverty sumpweed Iva axillaris Pursh Asterales Asteraceae
Gordon's ivesia Ivesia gordonii (Hook.) Torr. & Gray Rosales Rosaceae
twinleaf Jeffersonia diphylla (L.) Pers. Ranunculales Berberidaceae
American waterwillow Justicia americana (L.) Vahl Scrophulariales Acanthaceae
Madagascar widow's-thrill Kalanchoe blossfeldiana Poelln. Rosales Crassulaceae
cathedral bells Kalanchoe pinnata (Lam.) Pers. Rosales Crassulaceae
sharppoint fluvellin Kickxia elatine (L.) Dumort. Scrophulariales Scrophulariaceae
bluebuttons Knautia arvensis (L.) Coult. Dipsacales Dipsacaceae
redhot poker Kniphofia uvaria (L.) Oken Liliales Liliaceae
Korean lespedeza Kummerowia stipulacea (Maxim.) Makino Fabales Fabaceae (Leguminosae)
common lespedeza Kummerowia striata (Thunb.) Schindl. Fabales Fabaceae (Leguminosae)
hyacinth-bean Lablab purpureus ssp. purpureus (L.) Sweet Fabales Fabaceae (Leguminosae)
whitehead bogbutton Lachnocaulon anceps (Walt.) Morong Eriocaulales Eriocaulaceae
biennial lettuce Lactuca biennis (Moench) Fernald Asterales Asteraceae
tall lettuce Lactuca canadensis L. Asterales Asteraceae
Florida wild lettuce Lactuca floridana (L.) Gaertn. Asterales Asteraceae
willowleaf lettuce Lactuca saligna L. Asterales Asteraceae
lettuce Lactuca sativa L. Asterales Asteraceae
romaine lettuce Lactuca sativa var. longifolia Lam. Asterales Asteraceae
prickly lettuce Lactuca serriola L. Asterales Asteraceae
blue lettuce Lactuca tatarica var. pulchella (Pursh) Breitung Asterales Asteraceae
bitter lettuce Lactuca virosa L. Asterales Asteraceae
Coulter's horseweed Laennecia coulteri (A. Gray) G.L. Nesom Asterales Asteraceae
Norfolk-island lagunaea Lagunaea patersonia (Andrews) Malvales Malvaceae
henbit Lamium amplexicaule L. Lamiales Lamiaceae
yellow archangel Lamium galeobdolon (L.) L. Lamiales Lamiaceae
spotted deadnettle Lamium maculatum L. Lamiales Lamiaceae
purple deadnettle Lamium purpureum L. Lamiales Lamiaceae
purple deadnettle Lamium purpureum var. incisum (Willd.) Pers. Lamiales Lamiaceae
bleeding heart Lamprocapnos spectabilis (L.) Fukuhara Papaverales Fumariaceae
western sticktight Lappula occidentalis (S. Wats.) Greene Lamiales Boraginaceae
European sticktight Lappula squarrosa (Retz.) Dumort. Lamiales Boraginaceae
nipplewort Lapsana communis L. Asterales Asteraceae
bush vetchling Lathyrus eucosmus Butters & St. John Fabales Fabaceae (Leguminosae)
rough peavine Lathyrus hirsutus L. Fabales Fabaceae (Leguminosae)
aspen pea Lathyrus laetivirens Greene ex Rydb. Fabales Fabaceae (Leguminosae)
Nevada pea Lathyrus lanszwertii var. leucanthus (Rydb.) Dorn Fabales Fabaceae (Leguminosae)
everlasting peavine Lathyrus latifolius L. Fabales Fabaceae (Leguminosae)
aspen pea Lathyrus leucanthus Greene ex Rydb. Fabales Fabaceae (Leguminosae)
inflated duckweed Lemna gibba L. Arales Lemnaceae
minute duckweed Lemna minuta Kunth Arales Lemnaceae
fall hawkbit Leontodon autumnalis L. Asterales Asteraceae
lesser hawkbit Leontodon taraxacoides (Vill.) Mérat Asterales Asteraceae
motherwort Leonurus cardiaca L. Lamiales Lamiaceae
mesa paperwort Lepidium alyssoides Gray Capparales Brassicaceae
field pepperweed Lepidium campestre (L.) Ait. f. Capparales Brassicaceae
greenflower pepperweed Lepidium densiflorum Schrad. Capparales Brassicaceae
perennial pepperweed Lepidium latifolium L. Capparales Brassicaceae
mountain pepperweed Lepidium montanum Nutt. Capparales Brassicaceae
shining pepperweed Lepidium nitidum var. nitidum Nutt. Capparales Brassicaceae
veiny pepperweed Lepidium oblongum var. oblongum Small Capparales Brassicaceae
clasping pepperweed Lepidium perfoliatum L. Capparales Brassicaceae
featherleaf pepperweed Lepidium pinnatifidum Ledeb. Capparales Brassicaceae
garden cress Lepidium sativum L. Capparales Brassicaceae
Virginia pepperweed Lepidium virginicum L. Capparales Brassicaceae
Chinese sprangletop Leptochloa chinensis (L.) Nees Cyperales Poaceae
shrubby lespedeza Lespedeza bicolor Turcz. Fabales Fabaceae (Leguminosae)
roundhead lespedeza Lespedeza capitata Michx. Fabales Fabaceae (Leguminosae)
sericea lespedeza Lespedeza cuneata (Dum.-Cours.) G. Don Fabales Fabaceae (Leguminosae)
hairy lespedeza Lespedeza hirta (L.) Hornem. Fabales Fabaceae (Leguminosae)
trailing lespedeza Lespedeza procumbens Michx. Fabales Fabaceae (Leguminosae)
creeping lespedeza Lespedeza repens (L.) W. Bart. Fabales Fabaceae (Leguminosae)
violet lespedeza Lespedeza violacea (L.) Pers. Fabales Fabaceae (Leguminosae)
slender lespedeza Lespedeza virginica (L.) Britt. Fabales Fabaceae (Leguminosae)
foothill bladderpod Lesquerella ludoviciana (Nutt.) S. Wats. Capparales Brassicaceae
oxeye daisy Leucanthemum vulgare Lam. Asterales Asteraceae
Shasta daisy Leucanthemum x superbum Berg. ex Kent. [maximum × lacustre] Asterales Asteraceae
common starlily Leucocrinum montanum Nutt. ex Gray Liliales Liliaceae
cenizo Leucophyllum laevigatum Standley Scrophulariales Scrophulariaceae
alpine lewisia Lewisia pygmaea (A. Gray) B.L. Rob. Caryophyllales Portulacaceae
bitter root Lewisia rediviva Pursh Caryophyllales Portulacaceae
tall blazing star Liatris aspera Michx. Asterales Asteraceae
Ontario blazing star Liatris cylindracea Michx. Asterales Asteraceae
pinkscale blazing star Liatris elegans (Walt.) Michx. Asterales Asteraceae
shaggy blazing star Liatris pilosa (Ait.) Willd. Asterales Asteraceae
dotted gayfeather Liatris punctata Hook. Asterales Asteraceae
dense blazing star Liatris spicata var. spicata (L.) Willd. Asterales Asteraceae
blazing star Liatris spp. ex Schreb. Asterales Asteraceae
leopard plant Ligularia stenocephala (Maxim.) Matsum. & Koidz. Asterales Asteraceae
Porter's licorice-root Ligusticum porteri Coult. & Rose Apiales Apiaceae
Canada lily Lilium canadense L. Liliales Liliaceae
pine lily Lilium catesbaei Walt. Liliales Liliaceae
tiger lily Lilium lancifolium Thunb. Liliales Liliaceae
Carolina lily Lilium michauxii Poir. Liliales Liliaceae
wood lily Lilium philadelphicum L. Liliales Liliaceae
lily Lilium spp. L. Liliales Liliaceae
turk's-cap lily Lilium superbum L. Liliales Liliaceae
Washington lily Lilium washingtonianum Kellogg Liliales Liliaceae
limnophila Limnophila sessiliflora (Vahl) Blume Scrophulariales Scrophulariaceae
sea lavender Limonium gerberi Soldano Plumbaginales Plumbaginaceae
water mudwort Limosella aquatica L. Scrophulariales Scrophulariaceae
Nuttall's linanthus Linanthus nuttallii (Gray) Greene ex Milliken Solanales Polemoniaceae
Dalmatian toadflax Linaria dalmatica (L.) P. Mill. Scrophulariales Scrophulariaceae
dalmatian toadflax Linaria dalmatica ssp. dalmatica (L.) P. Mill. Scrophulariales Scrophulariaceae
dalmatian toadflax Linaria dalmatica ssp. macedonica (Griseb.) D.A. Sutton Scrophulariales Scrophulariaceae
broomleaf toadflax Linaria genistifolia (L.) P. Mill. Scrophulariales Scrophulariaceae
Moroccan toadflax Linaria maroccana Hook. f. Scrophulariales Scrophulariaceae
toadflax Linaria spp. P. Mill. Scrophulariales Scrophulariaceae
Melancholy toad-flax Linaria tristis (L.) Scrophulariales Scrophulariaceae
yellow toadflax Linaria vulgaris P. Mill. Scrophulariales Scrophulariaceae
twinflower Linnaea borealis L. Dipsacales Caprifoliaceae
prairie flax Linum lewisii Pursh Linales Linaceae
blue flax Linum perenne L. Linales Linaceae
common flax Linum usitatissimum L. Linales Linaceae
Kure Atoll nehe Lipochaeta integrifolia (Nutt.) A. Gray Asterales Asteraceae
coastal nehe Lipochaeta lavarum (Gaudich.) DC. Asterales Asteraceae
monkeygrass Liriope muscari (Dcne.) Bailey Liliales Liliaceae
lilyturf Liriope spp. Lour. Liliales Liliaceae
northern twayblade Listera borealis Morong Orchidales Orchidaceae
bulbous woodland-star Lithophragma glabrum Nutt. Rosales Saxifragaceae
smallflower woodland-star Lithophragma parviflorum (Hook.) Nutt. ex Torr. & A. Gray Rosales Saxifragaceae
hoary puccoon Lithospermum canescens (Michx.) Lehm. Lamiales Boraginaceae
narrowleaf stoneseed Lithospermum incisum Lehm. Lamiales Boraginaceae
manyflowered stoneseed Lithospermum multiflorum Torr. ex Gray Lamiales Boraginaceae
shortleaf lobelia Lobelia brevifolia Nutt. ex A. DC. Campanulales Campanulaceae
cardinalflower Lobelia cardinalis L. Campanulales Campanulaceae
Indiantobacco Lobelia inflata L. Campanulales Campanulaceae
downy lobelia Lobelia puberula Michx. Campanulales Campanulaceae
great blue lobelia Lobelia siphilitica L. Campanulales Campanulaceae
lobelia Lobelia spp. L. Campanulales Campanulaceae
fernleaf biscuitroot Lomatium dissectum (Nutt.) Mathias & Constance Apiales Apiaceae
Gray's biscuitroot Lomatium grayi (Coult. & Rose) Coult. & Rose Apiales Apiaceae
marsh felwort Lomatogonium rotatum (L.) Fr. ex Fernald Gentianales Gentianaceae
birdsfoot trefoil Lotus corniculatus L. Fabales Fabaceae (Leguminosae)
narrowleaf bird's-foot trefoil Lotus tenuis Waldst. & Kit. ex Willd. Fabales Fabaceae (Leguminosae)
American bird's-foot trefoil Lotus unifoliolatus (Hook.) Benth. Fabales Fabaceae (Leguminosae)
bushy waterprimrose Ludwigia alternifolia L. Myrtales Onagraceae
winged waterprimrose Ludwigia decurrens Walt. Myrtales Onagraceae
large-flower primrose-willow Ludwigia grandiflora grandiflora (M. Micheli) Greuter & Burdet Myrtales Onagraceae
waterpurslane Ludwigia palustris (L.) Ell. Myrtales Onagraceae
creeping waterprimrose Ludwigia peploides (Kunth) Raven Myrtales Onagraceae
primrose-willow Ludwigia peruviana (L.) Hara Myrtales Onagraceae
floating waterprimrose Ludwigia repens J.R. Forst. Myrtales Onagraceae
primrose-willow Ludwigia spp. L. Myrtales Onagraceae
silver lupine Lupinus argenteus Pursh Fabales Fabaceae (Leguminosae)
stemless dwarf lupine Lupinus caespitosus Nutt. Fabales Fabaceae (Leguminosae)
tailcup lupine Lupinus caudatus Kellogg Fabales Fabaceae (Leguminosae)
broadleaf lupine Lupinus latifolius Lindl. ex J.G. Agardh Fabales Fabaceae (Leguminosae)
Pacific lupine Lupinus lepidus Dougl. ex Lindl. Fabales Fabaceae (Leguminosae)
Nootka lupine Lupinus nootkatensis Donn ex Sims Fabales Fabaceae (Leguminosae)
lodgepole lupine Lupinus parviflorus Nutt. ex Hook. & Arn. Fabales Fabaceae (Leguminosae)
perennial lupine Lupinus perennis L. Fabales Fabaceae (Leguminosae)
bigleaf lupine Lupinus polyphyllus Lindl. Fabales Fabaceae (Leguminosae)
silky lupine Lupinus sericeus Pursh Fabales Fabaceae (Leguminosae)
lupine Lupinus spp. L. Fabales Fabaceae (Leguminosae)
Texas bluebonnet Lupinus subcarnosus Hook. Fabales Fabaceae (Leguminosae)
sulphur lupine Lupinus sulphureus Dougl. ex Hook. Fabales Fabaceae (Leguminosae)
lady lupine Lupinus villosus Willd. Fabales Fabaceae (Leguminosae)
maltese-cross Lychnis chalcedonica L. Caryophyllales Caryophyllaceae
rose campion Lychnis coronaria (L.) Desr. Caryophyllales Caryophyllaceae
meadow campion Lychnis flos-cuculi L. Caryophyllales Caryophyllaceae
rare clubmoss Lycopodium obscurum L. Lycopodiales Lycopodiaceae
American bugleweed Lycopus americanus Muhl. ex W. Bart. Lamiales Lamiaceae
rough bugleweed Lycopus asper Greene Lamiales Lamiaceae
rose rush Lygodesmia aphylla (Nutt.) DC. Asterales Asteraceae
roughleaf yellow loosestrife Lysimachia asperulifolia Poir. Primulales Primulaceae
fringed loosestrife Lysimachia ciliata L. Primulales Primulaceae
moneywort Lysimachia nummularia L. Primulales Primulaceae
loosestrife Lysimachia spp. L. Primulales Primulaceae
garden loosestrife Lysimachia vulgaris L. Primulales Primulaceae
purple loosestrife Lythrum salicaria L. Myrtales Lythraceae
threebract loosestrife Lythrum tribracteatum Salzm. ex Spreng. Myrtales Lythraceae
Bigelow's tansyaster Machaeranthera bigelovii var. bigelovii (A. Gray) Greene Asterales Asteraceae
hoary tansyaster Machaeranthera canescens (Pursh) Gray Asterales Asteraceae
lacy tansyaster Machaeranthera pinnatifida (Hook.) Shinners Asterales Asteraceae
tahoka daisy Machaeranthera tanacetifolia (Kunth) Nees Asterales Asteraceae
showy tarweed Madia elegans D. Don ex Lindl. Asterales Asteraceae
cluster tarweed Madia glomerata Hook. Asterales Asteraceae
coast tarweed Madia sativa Molina Asterales Asteraceae
false lily-of-the-valley Maianthemum canadense desf. Liliales Liliaceae
false lily of the vally Maianthemum dilatatum (Alph. Wood) A. Nelson & J.F. Macbr. Liliales Liliaceae
feathery false lily of the valley Maianthemum racemosum ssp. racemosum (L.) Link Liliales Liliaceae
starry false lily of the valley Maianthemum stellatum (L.) Link Liliales Liliaceae
coppery mesemb Malephora crocea (Jacq.) Schwant. Caryophyllales Aizoaceae
musk mallow Malva moschata L. Malvales Malvaceae
common mallow Malva neglecta Wallr. Malvales Malvaceae
little mallow Malva parviflora L. Malvales Malvaceae
high mallow Malva sylvestris L. Malvales Malvaceae
alkali mallow Malvella leprosa (Ortega) Krapov. Malvales Malvaceae
false aloe Manfreda virginica (L.) Salisb. ex Rose Liliales Agavaceae
Cucamonga manroot Marah macrocarpus (Greene) Greene Violales Cucurbitaceae
western wildcucumber Marah oreganus (Torr. ex S. Wats.) T.J. Howell Violales Cucurbitaceae
horehound Marrubium peregrinum L. Lamiales Lamiaceae
white horehound Marrubium vulgare L. Lamiales Lamiaceae
Mohr's Barbara's buttons Marshallia mohrii Beadle & F.E. Boynt. Asterales Asteraceae
European pepperwort Marsilea quadrifolia L. Hydropteridales Marsileaceae
Prickly-leaved massonia Massonia muricata Gawler Asparagales Hyacinthaceae
pineapple-weed Matricaria discoidea DC. Asterales Asteraceae
wild chamomile Matricaria recutita L. Asterales Asteraceae
Asian mazus Mazus pumilus (Burm. f.) Steenis Scrophulariales Scrophulariaceae
Welsh-poppy Meconopsis cambrica (L.) Vig. Papaverales Papaveraceae
Indian cucumber Medeola virginiana L. Liliales Iridaceae
black medic Medicago lupulina L. Fabales Fabaceae (Leguminosae)
California burclover Medicago polymorpha L. Fabales Fabaceae (Leguminosae)
alfalfa Medicago sativa L. Fabales Fabaceae (Leguminosae)
barrel medick Medicago truncatula Gaertn. Fabales Fabaceae (Leguminosae)
plains blackfoot Melampodium leucanthum Torr. & Gray Asterales Asteraceae
Virginia bunchflower Melanthium virginicum L. Liliales Iridaceae
annual yellow sweetclover Melilotus indicus (L.) All. Fabales Fabaceae (Leguminosae)
yellow sweetclover Melilotus officinalis (L.) Lam. Fabales Fabaceae (Leguminosae)
lemon balm Melissa officinalis L. Lamiales Lamiaceae
bastard balm Melittis melissophyllum L. Lamiales Lamiaceae
water mint Mentha aquatica L. Lamiales Lamiaceae
field mint Mentha arvensis L. Lamiales Lamiaceae
pennyroyal Mentha pulegium L. Lamiales Lamiaceae
spearmint Mentha spicata L. Lamiales Lamiaceae
whitestem stickleaf Mentzelia albicaulis (Hook.) Torr. & A. Gray Violales Loasaceae
tenpetal stickleaf Mentzelia decapetala (Pursh ex Sims) Urban & Gilg ex Gilg Violales Loasaceae
smoothstem blazingstar Mentzelia laevicaulis (Hook.) Torr. & A. Gray Violales Loasaceae
bractless blazingstar Mentzelia nuda (Pursh) Torr. & A. Gray Violales Loasaceae
dog's mercury Mercurialis perennis L. Euphorbiales Euphorbiaceae
tall fringed bluebells Mertensia ciliata (James ex Torr.) G. Don Lamiales Boraginaceae
prairie bluebells Mertensia lanceolata (Pursh) DC. Lamiales Boraginaceae
oblongleaf bluebells Mertensia oblongifolia (Nutt.) G.Don Lamiales Boraginaceae
bluebells Mertensia spp. Roth Lamiales Boraginaceae
Virginia bluebells Mertensia virginica (L.) Pers. ex Link Lamiales Boraginaceae
crystalline iceplant Mesembryanthemum crystallinum L. Caryophyllales Aizoaceae
slenderleaf iceplant Mesembryanthemum nodiflorum L. Caryophyllales Aizoaceae
iceplant Mesembryanthemum spp. L. Caryophyllales Aizoaceae
globifera Micranthemum umbrosum (J.F. Gmel.) S.F. Blake Scrophulariales Scrophulariaceae
thoroughwort pennycress Microthlaspi perfoliatum (L.) F.K. Mey. Capparales Brassicaceae
African mile-a-minute Mikania cordata (Burm. f.) B.L. Robins. Asterales Asteraceae
climbing hempweed Mikania scandens (L.) Willd. Asterales Asteraceae
seep monkeyflower Mimulus guttatus DC. Scrophulariales Scrophulariaceae
purple monkeyflower Mimulus lewisii Pursh Scrophulariales Scrophulariaceae
muskflower Mimulus moschatus Dougl. ex Lindl. Scrophulariales Scrophulariaceae
dwarf purple monkeyflower Mimulus nanus Hook. & Arn. Scrophulariales Scrophulariaceae
Allegheny monkeyflower Mimulus ringens L. Scrophulariales Scrophulariaceae
arctic stitchwort Minuartia arctica (Stev. ex Ser.) Graebn. Caryophyllales Caryophyllaceae
twinflower sandwort Minuartia obtusiloba (Rydb.) House Caryophyllales Caryophyllaceae
Ross' sandwort Minuartia rossii (R. Br. ex Richardson) Graebn. Caryophyllales Caryophyllaceae
Colorado four o'clock Mirabilis multiflora (Torr.) Gray Caryophyllales Nyctaginaceae
wild four-o'clock Mirabilis nyctaginea (Michx.) MacM. Caryophyllales Nyctaginaceae
fivestamen miterwort Mitella pentandra Hook. Rosales Saxifragaceae
smallflower miterwort Mitella stauropetala Piper Rosales Saxifragaceae
bristly mallow Modiola caroliniana (L.) G. Don Malvales Malvaceae
largeleaf sandwort Moehringia macrophylla (Hook.) Fenzl Caryophyllales Caryophyllaceae
carpetweed Mollugo verticillata L. Caryophyllales Molluginaceae
scarlet beebalm Monarda didyma L. Lamiales Lamiaceae
wild bergamot Monarda fistulosa L. Lamiales Lamiaceae
spotted beebalm Monarda punctata L. Lamiales Lamiaceae
monarda Monarda spp. L. Lamiales Lamiaceae
mountain monardella Monardella odoratissima Benth. Lamiales Lamiaceae
single delight Moneses uniflora (L.) Gray Ericales Pyrolaceae
arrowleaved monochoria Monochoria hastata (L.) Solms Liliales Pontederiaceae
monochoria Monochoria vaginalis (Burm. f.) K. Presl ex Kunth Liliales Pontederiaceae
Nuttall povertyweed Monolepis nuttalliana (J.A. Schultes) Greene Caryophyllales Chenopodiaceae
pinesap Monotropa hypopithys L. Ericales Monotropaceae
Indianpipe Monotropa uniflora L. Ericales Monotropaceae
pygmy pipes Monotropsis odorata Schwein. ex Ell. Ericales Monotropaceae
marsh dayflower Murdannia keisak (Hassk.) Hand.-Maz. Commelinales Commelinaceae
doveweed Murdannia nudiflora (L.) Brenan Commelinales Commelinaceae
common grape hyacinth Muscari botryoides (L.) P. Mill. Liliales Liliaceae
grape hyacinth Muscari spp. P. Mill. Liliales Liliaceae
wall lettuce Mycelis muralis (L.) Dumort. Asterales Asteraceae
Asian forget-me-not Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja Lamiales Boraginaceae
broadleaf forget-me-not Myosotis latifolia Poir. Lamiales Boraginaceae
true forget-me-not Myosotis scorpioides L. Lamiales Boraginaceae
parrotfeather Myriophyllum aquaticum (Vell.) Verdc. Haloragales Haloragaceae
variable watermilfoil Myriophyllum heterophyllum Michx. Haloragales Haloragaceae
Eurasian watermilfoil Myriophyllum spicatum Linnaeus Haloragales Haloragaceae
Aster Asterales Asteraceae
southern naiad Najas guadalupensis (Spreng.) Magnus Najadales Najadaceae
brittleleaf naiad Najas minor All. Najadales Najadaceae
daffodils Narcissus spp. L. Liliales Liliaceae
onerow yellowcress Nasturtium microphyllum Boenn. ex Rchb. Capparales Brassicaceae
watercress Nasturtium officinale Ait. f. Capparales Brassicaceae
needleleaf navarretia Navarretia intertexta (Benth.) Hook. Solanales Polemoniaceae
Sacred lotus Nelumbo nucifera Gaertn. Nymphaeales Nelumbonaceae
basin nemophila Nemophila breviflora A. Gray Solanales Hydrophyllaceae
catnip Nepeta cataria L. Lamiales Lamiaceae
narrow swordfern Nephrolepis cordifolia (L.) C. Presl Polypodiales Dryopteridaceae
bicolor fanmustard Nerisyrenia camporum (A. Gray) Greene Capparales Brassicaceae
apple-of-Peru Nicandra physalodes (L.) Gaertn. Solanales Solanaceae
tobacco Nicotiana glutinosa L. Solanales Solanaceae
tobacco Nicotiana spp. L. Solanales Solanaceae
flue-cured tobacco Nicotiana tabacum L. Solanales Solanaceae
false garlic Nothoscordum bivalve (L.) Britt. Liliales Liliaceae
yellow waterlily Nuphar lutea (L.) Sm. Nymphaeales Nymphaeaceae
Canada toadflax Nuttallanthus canadensis (L.) D.A. Sutton Scrophulariales Scrophulariaceae
Virginia pennywort Obolaria virginica L. Gentianales Gentianaceae
basil Ocimum spp. L. Lamiales Lamiaceae
orchid Odontoglossum spp. Kunth Orchidales Orchidaceae
prairie evening-primrose Oenothera albicaulis Pursh Myrtales Onagraceae
common evening-primrose Oenothera biennis L. Myrtales Onagraceae
tufted evening-primrose Oenothera caespitosa Nutt. Myrtales Onagraceae
crownleaf evening-primrose Oenothera coronopifolia Torr. & Gray Myrtales Onagraceae
birdcage evening primrose Oenothera deltoides Torr. & Frém. Myrtales Onagraceae
Hooker's evening primrose Oenothera elata ssp. hookeri (Torr. & A. Gray) W. Dietr. & W.L. Wagner Myrtales Onagraceae
yellow evening-primrose Oenothera flava (A. Nels.) Garrett Myrtales Onagraceae
narrowleaf evening-primrose Oenothera fruticosa L. Myrtales Onagraceae
cutleaf evening-primrose Oenothera laciniata Hill Myrtales Onagraceae
showy evening-primrose Oenothera speciosa Nutt. Myrtales Onagraceae
evening-primrose Oenothera spp. L. Myrtales Onagraceae
stemless evening primrose Oenothera triloba Nutt. Myrtales Onagraceae
hairy evening-primrose Oenothera villosa ssp. strigosa (Rydb.) W. Dietr. & P.H. Raven Myrtales Onagraceae
inflated grasswidow Olsynium douglasii var. inflatum (Suksd.) Cholewa & Douglass M. Hend. Liliales Iridaceae
sainfoin Onobrychis viciifolia Scop. Fabales Fabaceae (Leguminosae)
Scotch thistle Onopordum acanthium L. Asterales Asteraceae
bull cottonthistle Onopordum tauricum Willd. Asterales Asteraceae
Kotschy's bee-orchid Ophrys kotschyi H. Fleischmann & Soó Orchidales Orchidaceae
naked man orchid Orchis italica Poiret Orchidales Orchidaceae
Parry's goldenrod Oreochrysum parryi (Gray) Rydb. Asterales Asteraceae
alpine oreoxis Oreoxis alpina (Gray) Coult. & Rose Apiales Apiaceae
wild marjoram Origanum vulgare L. Lamiales Lamiaceae
star-of-Bethlehem Ornithogalum umbellatum L. Liliales Liliaceae
Egyptian broomrape Orobanche aegyptiaca Pers. Scrophulariales Orobanchaceae
California broomrape Orobanche californica Cham. & Schltdl. Scrophulariales Orobanchaceae
nodding broomrape Orobanche cernua Loefl. [excluded] Scrophulariales Orobanchaceae
desert broomrape Orobanche cooperi (Gray) Heller Scrophulariales Orobanchaceae
crenate broomrape Orobanche crenata Forsk. Scrophulariales Orobanchaceae
sunflower broomrape Orobanche cumana Wallr. Scrophulariales Orobanchaceae
clustered broomrape Orobanche fasciculata Nutt. Scrophulariales Orobanchaceae
ivy broomrape Orobanche hederae Duby Scrophulariales Orobanchaceae
broomrape Orobanche loricata Rchb. Scrophulariales Orobanchaceae
small broomrape Orobanche minor Smith Scrophulariales Orobanchaceae
branched broomrape Orobanche ramosa L. Scrophulariales Orobanchaceae
oneflowered broomrape Orobanche uniflora L. Scrophulariales Orobanchaceae
yellow owl's-clover Orthocarpus luteus Nutt. Scrophulariales Scrophulariaceae
bluntseed sweetroot Osmorhiza depauperata Phil. Apiales Apiaceae
western sweetroot Osmorhiza occidentalis (Nutt. ex Torr. & Gray) Torr. Apiales Apiaceae
daisybush Osteospermum spp. L. Asterales Asteraceae
duck-lettuce Ottelia alismoides (Linnaeus) Pers. Hydrocharitales Hydrocharitaceae
wood sorrel Oxalis acetosella L. Geraniales Oxalidaceae
creeping woodsorrel Oxalis corniculata L. Geraniales Oxalidaceae
mountain woodsorrel Oxalis montana Raf. Geraniales Oxalidaceae
buttercup oxalis Oxalis pes-caprae L. Geraniales Oxalidaceae
woodsorrel Oxalis spp. L. Geraniales Oxalidaceae
yellow woodsorrel Oxalis stricta L. Geraniales Oxalidaceae
violet woodsorrel Oxalis violacea L. Geraniales Oxalidaceae
viscid locoweed Oxypolis borealis viscida DC. (Nutt.) Welsh Apiales Apiaceae
Fendler's cowbane Oxypolis fendleri (Gray) Heller Apiales Apiaceae
purple locoweed Oxypolis lambertii Pursh. Apiales Apiaceae
locoweed Oxypolis splendens Dougl. ex Hook. Apiales Apiaceae
alpine mountainsorrel Oxyria digyna (L.) Hill Polygonales Polygonaceae
viscid locoweed Oxytropis borealis var. viscida (Nutt.) S.L. Welsh Fabales Fabaceae (Leguminosae)
nodding locoweed Oxytropis deflexa (Pallas) DC. Fabales Fabaceae (Leguminosae)
Lambert crazyweed Oxytropis lambertii Pursh Fabales Fabaceae (Leguminosae)
locoweed Oxytropis lambertii x sericea Pursh, Nutt. Fabales Fabaceae (Leguminosae)
Nuttall's oxytrope Oxytropis multiceps Nutt. Fabales Fabaceae (Leguminosae)
white locoweed Oxytropis sericea Nutt. Fabales Fabaceae (Leguminosae)
showy crazyweed Oxytropis splendens Dougl. ex Hook. Fabales Fabaceae (Leguminosae)
Pachira Pachira quinata (Jacq.) W. S. Alverson Malvales Malvaceae
Allegheny spurge Pachysandra procumbens Michx. Euphorbiales Buxaceae
Japanese pachysandra Pachysandra terminalis Sieb. & Zucc. Euphorbiales Buxaceae
splitleaf groundsel Packera dimorphophylla dimorphophylla (Greene) W.A. Weber & A. Löve Asterales Asteraceae
Fendler's groundsel Packera fendleri (Gray) W.A. Weber & A. Löve Asterales Asteraceae
cressleaf groundsel Packera glabella (Poir) C. Jeffrey Asterales Asteraceae
New Mexico groundsel Packera neomexicana var. neomexicana (A. Gray) W.A. Weber & A. Löve Asterales Asteraceae
Rocky Mountain groundsel Packera streptanthifolia (Greene) W.A. Weber & A. Löve Asterales Asteraceae
hoary groundsel Packera werneriifolia (Gray) W.A. Weber & A. Löve Asterales Asteraceae
peony Paeonia officinalis L. Dilleniales Paeoniaceae
peony Paeonia spp. L. Dilleniales Paeoniaceae
American ginseng Panax quinquefolius L. Apiales Araliaceae
ginseng Panax spp. L. Apiales Araliaceae
pinnate poppy Papaver argemone L. Papaverales Papaveraceae
field poppy Papaver dubium L. Papaverales Papaveraceae
oriental poppy Papaver orientale L. Papaverales Papaveraceae
corn poppy Papaver rhoeas L. Papaverales Papaveraceae
opium poppy Papaver somniferum L. Papaverales Papaveraceae
yellow glandweed Parentucellia viscosa (L.) Caruel Scrophulariales Scrophulariaceae
Florida pellitory Parietaria floridana Nutt. Urticales Urticaceae
upright pellitory Parietaria officinalis L. Urticales Urticaceae
Pennsylvania pellitory Parietaria pensylvanica Muhl. ex Willd. Urticales Urticaceae
clustered pellitory Parietaria praetermissa Hinton Urticales Urticaceae
herb paris Paris quadrifolia L. Liliales Liliaceae
kidneyleaf grass of Parnassus Parnassia asarifolia Vent. Rosales Saxifragaceae
fringed grass of Parnassus Parnassia fimbriata Koenig Rosales Saxifragaceae
fringed grass of Parnassus Parnassia fimbriata var. fimbriata K.D. Koenig Rosales Saxifragaceae
Kotzebue's grass of Parnassus Parnassia kotzebuei Cham. ex Spreng. Rosales Saxifragaceae
Northern grass of Parnassus Parnassia palustris L. Rosales Saxifragaceae
creeping nailwort Paronychia sessiliflora Nutt. Caryophyllales Caryophyllaceae
guayule Parthenium argentatum A. Gray Asterales Asteraceae
ragweed parthenium Parthenium hysterophorus L. Asterales Asteraceae
tropical passionflower Passiflora anadenia Urban Violales Passifloraceae
maypop passionflower Passiflora incarnata L. Violales Passifloraceae
wild parsnip Pastinaca sativa L. Apiales Apiaceae
bracted lousewort Pedicularis bracteosa Benth. Scrophulariales Scrophulariaceae
Canadian lousewort Pedicularis canadensis L. Scrophulariales Scrophulariaceae
dwarf lousewort Pedicularis centranthera Gray Scrophulariales Scrophulariaceae
meadow lousewort Pedicularis crenulata Benth. Scrophulariales Scrophulariaceae
elephanthead lousewort Pedicularis groenlandica Retz. Scrophulariales Scrophulariaceae
swamp lousewort Pedicularis lanceolata Michx. Scrophulariales Scrophulariaceae
Parry's lousewort Pedicularis parryi Gray Scrophulariales Scrophulariaceae
giant lousewort Pedicularis procera Gray Scrophulariales Scrophulariaceae
sickletop lousewort Pedicularis racemosa Dougl. ex Benth. Scrophulariales Scrophulariaceae
sudetic lousewort Pedicularis sudetica Willd. Scrophulariales Scrophulariaceae
sudetic lousewort Pedicularis sudetica ssp. scopulorum (A. Gray) Hultén Scrophulariales Scrophulariaceae
African rue Peganum harmala L. Sapindales Zygophyllaceae
broadbeard beardtongue Penstemon angustifolius Nutt. ex Pursh Scrophulariales Scrophulariaceae
Colorado beardtongue Penstemon auriberbis Pennell Scrophulariales Scrophulariaceae
beardlip penstemon Penstemon barbatus (Cav.) Roth Scrophulariales Scrophulariaceae
Crandall's beardtongue Penstemon crandallii A. Nels. Scrophulariales Scrophulariaceae
Crandall's beardtongue Penstemon crandallii ssp. procumbens (Greene) D.D. Keck Scrophulariales Scrophulariaceae
Wasatch beardtongue Penstemon cyananthus Hook. Scrophulariales Scrophulariaceae
Davidson's penstemon Penstemon davidsonii Greene Scrophulariales Scrophulariaceae
Eaton penstemon Penstemon eatonii Gray Scrophulariales Scrophulariaceae
Gairdner's beardtongue Penstemon gairdneri Hook. Scrophulariales Scrophulariaceae
alpine sawsepal penstemon Penstemon glaber var. alpinus (Torr.) A. Gray Scrophulariales Scrophulariaceae
Hall's beardtongue Penstemon hallii Gray Scrophulariales Scrophulariaceae
Harbour's beardtoungue Penstemon harbourii Gray Scrophulariales Scrophulariaceae
James' beardtongue Penstemon jamesii Benth. Scrophulariales Scrophulariaceae
toadflax penstemon Penstemon linarioides A. Gray Scrophulariales Scrophulariaceae
tiger beardtongue Penstemon mensarum Pennell Scrophulariales Scrophulariaceae
pineneedle beardtongue Penstemon pinifolius Greene Scrophulariales Scrophulariaceae
littleflower penstemon Penstemon procerus Dougl. ex Graham Scrophulariales Scrophulariaceae
Rydberg's penstemon Penstemon rydbergii A. Nels. Scrophulariales Scrophulariaceae
sidebells penstemon Penstemon secundiflorus Benth. Scrophulariales Scrophulariaceae
royal penstemon Penstemon speciosus Douglas ex Lindl. Scrophulariales Scrophulariaceae
beardtongues Penstemon spp. Schmidel Scrophulariales Scrophulariaceae
Rocky Mountain penstemon Penstemon strictus Benth. Scrophulariales Scrophulariaceae
sharpsepal beardtongue Penstemon tenuis Small Scrophulariales Scrophulariaceae
germander beardtongue Penstemon teucrioides Greene Scrophulariales Scrophulariaceae
white wand beardtongue Penstemon tubiflorus Nutt. Scrophulariales Scrophulariaceae
oneside penstemon Penstemon unilateralis Rydb. Scrophulariales Scrophulariaceae
Venus penstemon Penstemon venustus Dougl. ex Lindl. Scrophulariales Scrophulariaceae
front range beardtongue Penstemon virens Pennell ex Rydb. Scrophulariales Scrophulariaceae
Whipple's penstemon Penstemon whippleanus Gray Scrophulariales Scrophulariaceae
Oregon yampah Perideridia oregana (S. Wats.) Mathias Apiales Apiaceae
perilla mint Perilla frutescens (L.) Britton Lamiales Lamiaceae
Russian sage Perovskia atriplicifolia Benth. Lamiales Lamiaceae
white prairieclover Petalostemum candidum Fabales Fabaceae (Leguminosae)
pestilence wort Petasites hybridus (L.) G. Gaertn., B. Mey. & Scherb. Asterales Asteraceae
hairypink Petrorhagia dubia (Raf.) G. López & Romo Caryophyllales Caryophyllaceae
parsley Petroselinum crispum (P. Mill.) Nyman ex A.W. Hill Apiales Apiaceae
petunia Petunia spp. Juss. Solanales Solanaceae
petunia Petunia x hybrida [axillaris × integrifolia] hort. ex E. Vilm. Solanales Solanaceae
fernleaf phacelia Phacelia bipinnatifida Michx. Solanales Hydrophyllaceae
varileaf phacelia Phacelia heterophylla Pursh Solanales Hydrophyllaceae
threadleaf phacelia Phacelia linearis (Pursh) Holz. Solanales Hydrophyllaceae
silky phacelia Phacelia sericea (Graham) Gray Solanales Hydrophyllaceae
phacelia Phacelia spp. Juss. Solanales Hydrophyllaceae
lima bean Phaseolus lunatus L. Fabales Fabaceae (Leguminosae)
bean Phaseolus spp. L. Fabales Fabaceae (Leguminosae)
common bean Phaseolus vulgaris L. Fabales Fabaceae (Leguminosae)
dwarf phlox Phlox condensata (Gray) E. Nels. Solanales Polemoniaceae
longleaf phlox Phlox longifolia Nutt. Solanales Polemoniaceae
flowery phlox Phlox multiflora Nels. Solanales Polemoniaceae
fall phlox Phlox paniculata L. Solanales Polemoniaceae
downy phlox Phlox pilosa L. Solanales Polemoniaceae
cushion phlox Phlox pulvinata (Wherry) Cronquist Solanales Polemoniaceae
phlox Phlox spp. L. Solanales Polemoniaceae
moss phlox Phlox subulata L Solanales Polemoniaceae
American lopseed Phryma leptostachya L. Lamiales Verbenaceae
northern fogfruit Phyla lanceolata (Michx.) Greene Lamiales Verbenaceae
mat lippia Phyla nodiflora (L.) Greene Lamiales Verbenaceae
niruri Phyllanthus niruri L. Euphorbiales Euphorbiaceae
leafflower Phyllanthus spp. L. Euphorbiales Euphorbiaceae
chamber bitter Phyllanthus urinaria L. Euphorbiales Euphorbiaceae
sharpleaf groundcherry Physalis acutifolia (Miers) Sandw. Solanales Solanaceae
strawberry groundcherry Physalis alkekengi L. Solanales Solanaceae
cutleaf groundcherry Physalis angulata L. Solanales Solanaceae
clammy groundcherry Physalis heterophylla Nees Solanales Solanaceae
longleaf groundcherry Physalis longifolia var. subglabrata (Mack. & Bush) Cronquist Solanales Solanaceae
tomatillo groundcherry Physalis philadelphica Lam. var. immaculata Waterfall Solanales Solanaceae
groundcherries Physalis spp. L. Solanales Solanaceae
Virginia groundcherry Physalis virginiana P. Mill. Solanales Solanaceae
sharpleaf twinpod Physaria acutifolia Rydb. Capparales Brassicaceae
Avery Peak twinpod Physaria alpina Rollins Capparales Brassicaceae
front range twinpod Physaria bellii Mulligan Capparales Brassicaceae
Rollins' twinpod Physaria rollinsii Mulligan Capparales Brassicaceae
roundtip twinpod Physaria vitulifera Rydb. Capparales Brassicaceae
obedient-plant Physostegia virginiana (L.) Benth. Lamiales Lamiaceae
round headed rampion Phyteuma obiculare L. Campanulales Campanulaceae
spiked rampion Phyteuma spicatum L. Campanulales Campanulaceae
common pokeweed Phytolacca americana L. Caryophyllales Phytolaccaceae
pokeweed Phytolacca spp. L. Caryophyllales Phytolaccaceae
bristly oxtongue Picris echioides L. Asterales Asteraceae
hawkweed oxtongue Picris hieracioides L. Asterales Asteraceae
clearweed Pilea pumila (L.) A. Gray Urticales Urticaceae
blueflower butterwort Pinguicula caerulea Walt. Scrophulariales Lentibulariaceae
yellow butterwort Pinguicula lutea Walt. Scrophulariales Lentibulariaceae
common butterwort Pinguicula vulgaris L. Scrophulariales Lentibulariaceae
waterlettuce Pistia stratiotes L. Arales Araceae
silk-grass Pityopsis graminifolia (Michx.) Nutt. Asterales Asteraceae
Dixie silverback fern Pityrogramma calomelanos (L.) Link Polypodiales Pteridaceae
sand plantain Plantago arenaria Waldst. & Kit. Plantaginales Plantaginaceae
bracted plantain Plantago aristata Michx. Plantaginales Plantaginaceae
buckhorn plantain Plantago lanceolata L. Plantaginales Plantaginaceae
broadleaf plantain Plantago major L. Plantaginales Plantaginaceae
woolly plantain Plantago patagonica Jacq. Plantaginales Plantaginaceae
blackseed plantain Plantago rugelii Dcne. Plantaginales Plantaginaceae
plantains Plantago spp. L. Plantaginales Plantaginaceae
paleseed plantain Plantago virginica L. Plantaginales Plantaginaceae
yellow fringed orchid Platanthera ciliaris (L.) Lindl. Orchidales Orchidaceae
scentbottle Platanthera dilatata (Pursh) Lindl. ex Beck Orchidales Orchidaceae
scentbottle Platanthera dilatata var. dilatata (Pursh) Lindl. ex Beck Orchidales Orchidaceae
palegreen orchid Platanthera flava (L.) Lindl. Orchidales Orchidaceae
greater purple fringed orchid Platanthera grandiflora (Bigelow) Lindl. Orchidales Orchidaceae
northern green orchid Platanthera hyperborea (L.) Lindl. Orchidales Orchidaceae
green fringed orchid Platanthera lacera (Michx.) G. Don Orchidales Orchidaceae
purple fringeless orchid Platanthera peramoena (A. Gray) A. Gray Orchidales Orchidaceae
little spurflower Plectranthus parviflorus Willd. Lamiales Lamiaceae
mayapple Podophyllum peltatum L. Ranunculales Berberidaceae
snakemouth orchid Pogonia ophioglossoides (L.) Ker-Gawl. Orchidales Orchidaceae
roughseed clammyweed Polanisia dodecandra (L.) DC. Capparales Capparaceae
blue Jacob's-ladder Polemonium caeruleum L. Solanales Polemoniaceae
elegant Jacob's-ladder Polemonium elegans Greene Solanales Polemoniaceae
annual polemonium Polemonium micranthum Benth. Solanales Polemoniaceae
Jacob's-ladder Polemonium pulcherrimum Hook. Solanales Polemoniaceae
Jacob's-ladder Polemonium pulcherrimum ssp. delicatum (Rydb.) Brand Solanales Polemoniaceae
sticky polemonium Polemonium viscosum Nutt. Solanales