Select a state: North America Alabama Alaska Alberta Arizona Arkansas British Columbia California Colorado Connecticut Delaware Florida Georgia Greenland Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Manitoba Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Brunswick New Foundland And Labrador New Hampshire New Jersey New Mexico New York North Carolina North Dakota North West Territories Nova Scotia Ohio Oklahoma Ontario Oregon Pennsylvania Prince Edouard Island Puerto Rico Quebec Rhode Island Saskatchewan South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington D.C. Washington West Virginia Wisconsin Wyoming Yukon Territories
Pinaceae Malvaceae Euphorbiaceae Asteraceae Aceraceae Calyceraceae Lamiaceae Ranunculaceae Acoraceae Pteridaceae Fumariaceae Poaceae Apiaceae Fabaceae Hippocastanaceae Scrophulariaceae Rosaceae Caryophyllaceae Simaroubaceae Lardizabalaceae Liliaceae Alismataceae Brassicaceae Betulaceae Amaranthaceae Lythraceae Vitaceae Boraginaceae Apocynaceae Primulaceae Ericaceae Orchidaceae Araliaceae Viscaceae Papaveraceae Araceae Aristolochiaceae Plumbaginaceae Asclepiadaceae Annonaceae Rubiaceae Aspleniaceae Dryopteridaceae Chenopodiaceae Azollaceae Gentianaceae Iridaceae Berberidaceae Urticaceae Ophioglossaceae Cabombaceae Moraceae Buddlejaceae Cyperaceae Butomaceae Callitrichaceae Calycanthaceae Convolvulaceae Campanulaceae Bignoniaceae Cannaceae Cannabaceae Solanaceae Sapindaceae Juglandaceae Fagaceae Rhamnaceae Celastraceae Ulmaceae Ceratophyllaceae Cercidiphyllaceae Cupressaceae Onagraceae Pyrolaceae Oleaceae Saxifragaceae Cucurbitaceae Portulacaceae Capparaceae Verbenaceae Clethraceae Polemoniaceae Santalaceae Commelinaceae Myricaceae Orobanchaceae Tiliaceae Cornaceae Anacardiaceae Crassulaceae Cuscutaceae Dennstaedtiaceae Hydrangeaceae Caprifoliaceae Dioscoreaceae Ebenaceae Dipsacaceae Thymelaeaceae Droseraceae Hydrocharitaceae Elaeagnaceae Elatinaceae Hydrophyllaceae Equisetaceae Eriocaulaceae Geraniaceae Polygonaceae Limnanthaceae Ginkgoaceae Styracaceae Hamamelidaceae Cistaceae Pontederiaceae Saururaceae Lycopodiaceae Violaceae Clusiaceae Aquifoliaceae Balsaminaceae Isoetaceae Grossulariaceae Juncaceae Acanthaceae Zygophyllaceae Lemnaceae Lauraceae Linaceae Magnoliaceae Lygodiaceae Marsileaceae Menispermaceae Menyanthaceae Aizoaceae Nyctaginaceae Molluginaceae Monotropaceae Haloragaceae Najadaceae Nelumbonaceae Nymphaeaceae Cactaceae Osmundaceae Oxalidaceae Buxaceae Paeoniaceae Passifloraceae Thelypteridaceae Rutaceae Phytolaccaceae Plantaginaceae Platanaceae Podostemaceae Polygalaceae Polypodiaceae Salicaceae Potamogetonaceae Pedaliaceae Resedaceae Melastomataceae Sarraceniaceae Scheuchzeriaceae Selaginellaceae Smilacaceae Sparganiaceae Staphyleaceae Symplocaceae Tamaricaceae Taxaceae Trapaceae Hymenophyllaceae Juncaginaceae Tropaeolaceae Typhaceae Lentibulariaceae Valerianaceae Vittariaceae Blechnaceae Xyridaceae Agavaceae Zannichelliaceae
Abies Abutilon Acalypha Acanthospermum Acer Achillea Acicarpha Acinos Aconitum Acorus Actaea Adiantum Adlumia Aegilops Aegopodium Aeschynomene Aesculus Aethusa Agalinis Agastache Ageratina Agrimonia Agrostemma Agrostis Ailanthus Aira Ajuga Akebia Albizia Alcea Aletris Alisma Alliaria Allium Alnus Alopecurus Alternanthera Althaea Alyssum Amaranthus Ambrosia Amelanchier Amianthium Ammannia Ammi Ammophila Amorpha Ampelopsis Amphiachyris Amphicarpaea Amsinckia Amsonia Anacyclus Anagallis Anaphalis Anchusa Andromeda Andropogon Anemone Anethum Angelica Anoda Antennaria Anthemis Anthoxanthum Anthriscus Anthyllis Antirrhinum Apera Apios Apium Aplectrum Apocynum Aquilegia Arabidopsis Arabis Arachis Aralia Arceuthobium Arctium Arctostaphylos Arenaria Arethusa Argemone Argentina Arisaema Aristida Aristolochia Armeria Armoracia Arnica Arnoglossum Arnoseris Arrhenatherum Artemisia Arthraxon Aruncus Asarum Asclepias Asimina Asparagus Asperugo Asperula Asplenium Aster Astragalus Athyrium Atriplex Aureolaria Avena Azolla Baccharis Ballota Baptisia Barbarea Bartonia Bassia Beckmannia Belamcanda Bellis Berberis Berteroa Beta Betula Bidens Bifora Blephilia Boehmeria Boltonia Borago Botrychium Bouteloua Brachyelytrum Brasenia Brassica Brickellia Briza Bromus Broussonetia Buchnera Buddleja Buglossoides Bulbostylis Bunias Bupleurum Butomus Cabomba Cakile Calamagrostis Calamintha Calamovilfa Calendula Calla Callirhoe Callistephus Callitriche Calopogon Caltha Calycanthus Calycera Calystegia Camassia Camelina Campanula Campanulastrum Campsis Canna Cannabis Capsella Capsicum Cardamine Cardaria Cardiospermum Carduus Carex Carpinus Carum Carya Castanea Castilleja Catalpa Caucalis Caulophyllum Ceanothus Celastrus Celosia Celtis Cenchrus Centaurea Centaurium Centipeda Cephalanthus Cerastium Ceratonia Ceratophyllum Cercidiphyllum Cercis Chaenomeles Chaenorhinum Chaerophyllum Chaiturus Chamaecrista Chamaecyparis Chamaedaphne Chamaelirium Chamaemelum Chamaesyce Chamerion Chasmanthium Cheilanthes Chelidonium Chelone Chenopodium Chimaphila Chionanthus Chloris Chondrilla Chorispora Chrysanthemum Chrysogonum Chrysopsis Chrysosplenium Cichorium Cicuta Cinna Circaea Cirsium Citrullus Cladium Cladrastis Clarkia Claytonia Clematis Cleome Clerodendrum Clethra Clinopodium Clintonia Clitoria Coincya Coix Collinsia Collinsonia Collomia Colocasia Colutea Comandra Comarum Commelina Comptonia Conioselinum Conium Conoclinium Conopholis Conringia Consolida Convallaria Convolvulus Conyza Coptis Corallorhiza Corchorus Coreopsis Coriandrum Cornus Coronopus Corrigiola Corydalis Corylus Corynephorus Cosmos Cotinus Cotoneaster Crassula Crataegus Crepis Crotalaria Croton Cruciata Crypsis Cryptogramma Cryptotaenia Cucumis Cucurbita Cunila Cuphea Cuscuta Cyclachaena Cycloloma Cyclospermum Cydonia Cymbalaria Cymophyllus Cynanchum Cynodon Cynoglossum Cynosurus Cyperus Cypripedium Cystopteris Cytisus Dactylis Dactyloctenium Dactylorhiza Dalea Dalibarda Danthonia Dasiphora Dasistoma Dasypyrum Datura Daucus Decodon Delphinium Dennstaedtia Deparia Deschampsia Descurainia Desmanthus Desmodium Deutzia Dianthus Diarrhena Dicentra Dichanthelium Dichondra Diervilla Digitalis Digitaria Diodia Dioscorea Diospyros Diplazium Diplotaxis Dipsacus Dirca Distichlis Dittrichia Dodecatheon Doellingeria Draba Dracocephalum Drosera Dryopteris Duchesnea Dulichium Dyssodia Ecballium Echinacea Echinochloa Echinocystis Echinops Echium Eclipta Egeria Elaeagnus Elatine Eleocharis Elephantopus Eleusine Eleutherococcus Ellisia Elodea Elsholtzia Elymus Epifagus Epigaea Epilobium Epipactis Equisetum Eragrostis Eranthis Erechtites Erica Erigenia Erigeron Eriocaulon Eriochloa Eriophorum Erodium Eruca Erucastrum Eryngium Erysimum Erythronium Eschscholzia Eubotrys Euonymus Eupatoriadelphus Eupatorium Euphorbia Euphrasia Eurybia Eustachys Euthamia Exochorda Fagopyrum Fagus Falcaria Festuca Ficus Filago Filipendula Fimbristylis Floerkea Foeniculum Forsythia Fragaria Frangula Frasera Fraxinus Froelichia Fumaria Gaillardia Galactia Galanthus Galearis Galega Galeopsis Galinsoga Galium Gamochaeta Gaultheria Gaura Gaylussacia Gentiana Gentianella Gentianopsis Geranium Geum Gillenia Ginkgo Gladiolus Glandularia Glaucium Glebionis Glechoma Gleditsia Glossostigma Glyceria Glycine Glycyrrhiza Gnaphalium Gomphrena Goodyera Gossypium Gratiola Grindelia Guizotia Gymnocarpium Gymnocladus Gymnopogon Gypsophila Hackelia Halesia Hamamelis Hasteola Hedeoma Hedera Helenium Helianthemum Helianthus Heliopsis Heliotropium Helleborus Hemarthria Hemerocallis Hepatica Heracleum Herniaria Hesperis Hesperostipa Heteranthera Heterotheca Heuchera Hibiscus Hieracium Hierochloe Hippocrepis Holcus Holosteum Hordeum Hosta Hottonia Houstonia Houttuynia Humulus Huperzia Hyacinthoides Hyacinthus Hybanthus Hydrangea Hydrastis Hydrilla Hydrocotyle Hydrophyllum Hylotelephium Hyoscyamus Hypecoum Hypericum Hypochaeris Hypoxis Hyssopus Iberis Ilex Impatiens Inula Iodanthus Ionactis Ipomoea Iresine Iris Isoetes Isolepis Isotria Itea Iva Ixeris Jacquemontia Jasione Jeffersonia Juglans Juncus Juniperus Justicia Kallstroemia Kalmia Kerria Kickxia Knautia Koeleria Koelreuteria Kolkwitzia Kosteletzkya Krigia Kummerowia Kyllinga Lablab Lactuca Lagenaria Lamiastrum Lamium Lamprocapnos Landoltia Laportea Lappula Lapsana Larix Lathyrus Lechea Ledum Leersia Legousia Leiophyllum Lemna Lens Leontodon Leonurus Lepidium Leptochloa Leptosiphon Lespedeza Leucanthemum Leucojum Leucospora Levisticum Leymus Liatris Ligusticum Ligustrum Lilium Limosella Linaria Lindera Lindernia Linnaea Linum Liparis Lipocarpha Liquidambar Liriodendron Listera Lithospermum Lobelia Lobularia Logfia Lolium Lonicera Lotus Ludwigia Lunaria Lupinus Luzula Lychnis Lycium Lycopodiella Lycopodium Lycopus Lygodium Lyonia Lysimachia Lythrum Macleaya Maclura Madia Magnolia Mahonia Maianthemum Malaxis Malus Malva Malvastrum Marrubium Marshallia Marsilea Matelea Matricaria Matteuccia Mazus Medeola Medicago Meehania Melampyrum Melica Melilotus Melissa Melothria Menispermum Mentha Menyanthes Menziesia Mercurialis Merremia Mertensia Mesembryanthemum Micranthemum Microstegium Microthlaspi Mikania Milium Mimosa Mimulus Minuartia Mirabilis Miscanthus Misopates Mitchella Mitella Modiola Moehringia Moenchia Molinia Mollugo Moluccella Momordica Monarda Moneses Monotropa Montia Morella Morus Muhlenbergia Muscari Myosotis Myosoton Myosurus Myrica Myriophyllum Myrrhis Najas Napaea Narcissus Nasturtium Navarretia Nelumbo Neobeckia Nepeta Neslia Nicandra Nicotiana Nigella Nonea Nuphar Nuttallanthus Nymphaea Nymphoides Nyssa Obolaria Ocimum Oclemena Oenothera Oligoneuron Omalotheca Onoclea Ononis Onopordum Onosmodium Ophioglossum Opuntia Origanum Ornithogalum Ornithopus Orobanche Orontium Orthilia Oryzopsis Osmorhiza Osmunda Ostrya Oxalis Oxydendrum Oxypolis Pachysandra Packera Paeonia Panax Panicum Papaver Parapholis Parietaria Parnassia Paronychia Parthenium Parthenocissus Paspalum Passiflora Pastinaca Paulownia Paxistima Pedicularis Pellaea Peltandra Pennisetum Penstemon Penthorum Perilla Periploca Petasites Petrorhagia Petroselinum Petunia Peucedanum Phacelia Phalaris Phaseolus Phegopteris Phellodendron Phemeranthus Philadelphus Phleum Phlox Phoradendron Photinia Phragmites Phryma Phyla Phyllanthus Physalis Physocarpus Physostegia Phytolacca Picea Picris Pilea Pimpinella Pinellia Pinus Piptatherum Piptochaetium Pisum Plagiobothrys Plantago Platanthera Platanus Platycodon Pluchea Poa Podophyllum Podostemum Pogonia Polanisia Polemonium Polycarpon Polygala Polygonatum Polygonella Polygonum Polymnia Polypodium Polypogon Polypremum Polystichum Poncirus Pontederia Populus Portulaca Potamogeton Potentilla Prenanthes Proboscidea Prosartes Proserpinaca Prunella Prunus Pseudognaphalium Pseudolysimachion Pseudosasa Pseudotsuga Ptelea Pteridium Pterospora Ptilimnium Puccinellia Pueraria Pycnanthemum Pyracantha Pyrola Pyrrhopappus Pyrularia Pyrus Quercus Ranunculus Raphanus Rapistrum Ratibida Reseda Rhamnus Rheum Rhexia Rhodiola Rhododendron Rhodotypos Rhus Rhynchospora Ribes Richardia Ricinus Robinia Rorippa Rosa Rostraria Rotala Rubia Rubus Rudbeckia Ruellia Rumex Ruta Sabatia Saccharum Sagina Sagittaria Salix Salsola Salvia Sambucus Samolus Sanguinaria Sanguisorba Sanicula Saponaria Sarracenia Sassafras Satureja Saururus Saxifraga Scandix Schedonorus Scheuchzeria Schizachne Schizachyrium Schoenoplectus Scilla Scirpus Scleranthus Scleria Scolymus Scorpiurus Scrophularia Scutellaria Secale Securigera Sedum Selaginella Senecio Senna Sericocarpus Sesamum Sesbania Sesuvium Setaria Shepherdia Sherardia Sibbaldiopsis Sicyos Sida Sideritis Silene Silphium Silybum Sinapis Sisymbrium Sisyrinchium Sium Smallanthus Smilax Solanum Solidago Sonchus Sorbaria Sorbus Sorghastrum Sorghum Sparganium Spartina Spergula Spergularia Sphenopholis Spinacia Spiraea Spiranthes Spirodela Sporobolus Stachys Staphylea Stellaria Stenanthium Streptopus Strophostyles Stuckenia Stylophorum Stylosanthes Styphnolobium Styrax Suaeda Succisella Symphoricarpos Symphyotrichum Symphytum Symplocarpus Symplocos Syringa Taeniatherum Taenidia Tagetes Tamarix Tanacetum Taraxacum Taxodium Taxus Teesdalia Tephrosia Tetradium Tetragonia Teucrium Thalictrum Thaspium Thelypteris Thermopsis Thinopyrum Thlaspi Thuja Thymus Tiarella Tidestromia Tilia Tipularia Torilis Torreyochloa Toxicodendron Tradescantia Tragopogon Tragus Trapa Trautvetteria Triadenum Tribulus Trichomanes Trichophorum Trichostema Tricyrtis Tridens Trientalis Trifolium Triglochin Trigonella Trillium Triodanis Triosteum Triphora Triplasis Tripleurospermum Tripolium Tripsacum Trisetum Triticum Trollius Tropaeolum Tsuga Tulipa Turgenia Tussilago Typha Ulex Ulmus Urochloa Urtica Utricularia Uvularia Vaccaria Vaccinium Valeriana Valerianella Vallisneria Veratrum Verbascum Verbena Verbesina Vernonia Veronica Veronicastrum Viburnum Vicia Vigna Vinca Viola Vitex Vitis Vittaria Vulpia Waldsteinia Weigela Wisteria Wolffia Wolffiella Woodsia Woodwardia Xanthium Xanthorhiza Xyris Youngia Yucca Zannichellia Zantedeschia Zanthoxylum Zea Zelkova Zigadenus Zinnia Zizania Zizia Zygophyllum