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 Aceraceae Asteraceae Lamiaceae Ranunculaceae Acoraceae Pteridaceae Fumariaceae Adoxaceae Apiaceae Hippocastanaceae Scrophulariaceae Rosaceae Poaceae Caryophyllaceae Simaroubaceae Liliaceae Alismataceae Brassicaceae Betulaceae Amaranthaceae Orchidaceae Lythraceae Fabaceae Vitaceae Boraginaceae Primulaceae Ericaceae Apocynaceae Araliaceae Viscaceae Papaveraceae Araceae Aristolochiaceae Asclepiadaceae Annonaceae Aspleniaceae Dryopteridaceae Chenopodiaceae Azollaceae Gentianaceae Iridaceae Berberidaceae Urticaceae Ophioglossaceae Cabombaceae Cyperaceae Butomaceae Callitrichaceae Onagraceae Convolvulaceae Campanulaceae Bignoniaceae Cannabaceae Juglandaceae Fagaceae Rhamnaceae Celastraceae Ulmaceae Rubiaceae Dipsacaceae Ceratophyllaceae Pyrolaceae Saxifragaceae Cucurbitaceae Portulacaceae Capparaceae Polemoniaceae Santalaceae Commelinaceae Myricaceae Orobanchaceae Cornaceae Cuscutaceae Solanaceae Dennstaedtiaceae Caprifoliaceae Dioscoreaceae Thymelaeaceae Droseraceae Elaeagnaceae Elatinaceae Hydrophyllaceae Hydrocharitaceae Equisetaceae Eriocaulaceae Polygonaceae Geraniaceae Limnanthaceae Oleaceae Verbenaceae Hamamelidaceae Cistaceae Pontederiaceae Hippuridaceae Lycopodiaceae Violaceae Crassulaceae Clusiaceae Aquifoliaceae Balsaminaceae Isoetaceae Juncaceae Cupressaceae Acanthaceae Lemnaceae Linaceae Plantaginaceae Moraceae Menispermaceae Menyanthaceae Nyctaginaceae Molluginaceae Monotropaceae Haloragaceae Najadaceae Nelumbonaceae Nymphaeaceae Cactaceae Osmundaceae Oxalidaceae Thelypteridaceae Hydrangeaceae Phytolaccaceae Lentibulariaceae Platanaceae Polygalaceae Polypodiaceae Salicaceae Potamogetonaceae Rutaceae Resedaceae Melastomataceae Anacardiaceae Grossulariaceae Ruppiaceae Sarraceniaceae Lauraceae Saururaceae Scheuchzeriaceae Selaginellaceae Pedaliaceae Smilacaceae Sparganiaceae Staphyleaceae Taxaceae Aizoaceae Tiliaceae Zygophyllaceae Juncaginaceae Typhaceae Valerianaceae Xyridaceae Agavaceae Zannichelliaceae
Abies Abutilon Acalypha Acer Achillea Acinos Aconitum Acorus Acroptilon Actaea Adiantum Adlumia Adoxa Aegopodium Aesculus Aethusa Agalinis Agastache Ageratina Agrimonia Agropyron Agrostemma Agrostis Ailanthus Ajuga Alcea Alchemilla Aletris Alisma Alliaria Allium Alnus Alopecurus Althaea Alyssum Amaranthus Ambrosia Amelanchier Amerorchis Ammannia Ammophila Amorpha Ampelopsis Amphicarpaea Amsinckia Anagallis Anaphalis Anchusa Andromeda Andropogon Androsace Anemone Anethum Angelica Antennaria Anthemis Anthoxanthum Anthriscus Anthyllis Antirrhinum Apera Apios Aplectrum Apocynum Aquilegia Arabidopsis Arabis Aralia Arceuthobium Arctium Arctostaphylos Arenaria Arethusa Argemone Argentina Arisaema Aristida Aristolochia Armoracia Arnoglossum Arrhenatherum Artemisia Aruncus Asarum Asclepias Asimina Asparagus Asplenium Astragalus Athyrium Atriplex Aureolaria Avena Azolla Bacopa Ballota Baptisia Barbarea Bartonia Bassia Beckmannia Belamcanda Bellis Berberis Berteroa Berula Besseya Betula Bidens Blephilia Boehmeria Boltonia Borago Botrychium Bouteloua Brachyelytrum Brasenia Brassica Brickellia Briza Bromus Buglossoides Bulbostylis Bunias Butomus Cakile Calamagrostis Calamovilfa Calendula Calla Callirhoe Callistephus Callitriche Calluna Calopogon Caltha Calylophus Calypso Calystegia Camassia Camelina Campanula Campanulastrum Campsis Cannabis Capsella Caragana Cardamine Cardaria Carduus Carex Carpinus Carum Carya Castanea Castilleja Catabrosa Catalpa Catapodium Caulophyllum Ceanothus Celastrus Celosia Celtis Cenchrus Centaurea Centaurium Cephalanthus Cephalaria Cerastium Ceratocephala Ceratophyllum Cercis Chaenomeles Chaenorhinum Chaerophyllum Chaiturus Chamaecrista Chamaedaphne Chamaesyce Chamerion Chasmanthium Cheilanthes Chelidonium Chelone Chenopodium Chimaphila Chrysosplenium Cicer Cichorium Cicuta Cinna Circaea Cirsium Citrullus Cladium Claytonia Clematis Cleome Clinopodium Clintonia Clitoria Cnicus Collinsia Collinsonia Collomia Comandra Comarum Commelina Comptonia Conioselinum Conium Conopholis Conringia Consolida Convallaria Convolvulus Conyza Coptis Corallorhiza Coreopsis Corispermum Cornus Coronopus Corydalis Corylus Cosmos Cotoneaster Crataegus Crepis Crotalaria Croton Crypsis Cryptogramma Cryptotaenia Cucumis Cucurbita Cuscuta Cyclachaena Cycloloma Cymbalaria Cynanchum Cynoglossum Cynosurus Cyperus Cypripedium Cystopteris Dactylis Dactylorhiza Dalea Danthonia Dasiphora Dasistoma Datura Daucus Decodon Delphinium Dennstaedtia Deparia Deschampsia Descurainia Desmanthus Desmodium Dianthus Diarrhena Dicentra Dichanthelium Didiplis Diervilla Digitalis Digitaria Diodia Dioscorea Diplazium Diplotaxis Dipsacus Dirca Distichlis Dodecatheon Doellingeria Draba Dracocephalum Drosera Dryopteris Duchesnea Dulichium Dyssodia Echinacea Echinochloa Echinocystis Echinodorus Echinops Echium Eclipta Elaeagnus Elatine Eleocharis Eleusine Ellisia Elodea Elsholtzia Elymus Enemion Epifagus Epigaea Epilobium Epipactis Equisetum Eragrostis Erechtites Erigenia Erigeron Eriocaulon Eriochloa Eriodictyon Eriogonum Eriophorum Erodium Erucastrum Eryngium Erysimum Erythronium Eschscholzia Euonymus Eupatoriadelphus Eupatorium Euphorbia Euphrasia Eurybia Euthamia Fagopyrum Fagus Falcaria Festuca Filipendula Fimbristylis Floerkea Foeniculum Fragaria Frangula Fraxinus Froelichia Fuirena Fumaria Gaillardia Galearis Galeopsis Galinsoga Galium Gamochaeta Gaultheria Gaura Gaylussacia Genista Gentiana Gentianella Gentianopsis Geocaulon Geranium Geum Gilia Glandularia Glechoma Gleditsia Glyceria Glycine Glycyrrhiza Gnaphalium Goodyera Gratiola Grindelia Guizotia Gymnocarpium Gymnocladus Gypsophila Hackelia Halenia Hamamelis Hasteola Hedeoma Helenium Helianthemum Helianthus Heliopsis Hemerocallis Hepatica Heracleum Herniaria Hesperis Hesperostipa Heteranthera Heterotheca Heuchera Hibiscus Hieracium Hierochloe Hippuris Holcus Holosteum Hordeum Houstonia Hudsonia Humulus Huperzia Hybanthus Hydrastis Hydrocotyle Hydrophyllum Hylotelephium Hyoscyamus Hypericum Hypochaeris Hypoxis Hyssopus Iberis Ilex Impatiens Inula Iodanthus Ionactis Ipomoea Ipomopsis Iris Isoetes Iva Jeffersonia Jovibarba Juglans Juncus Juniperus Justicia Kalmia Kickxia Knautia Koeleria Krigia Kummerowia Lactuca Lamium Lamprocapnos Laportea Lappula Lapsana Larix Lathyrus Lechea Ledum Leersia Lemna Leontodon Leonurus Lepidium Leptochloa Lespedeza Lesquerella Leucanthemella Leucanthemum Leucophysalis Levisticum Leymus Liatris Ligustrum Lilium Linaria Lindernia Linnaea Linum Liparis Lipocarpha Listera Lithospermum Littorella Lobelia Lobularia Lolium Lonicera Lotus Ludwigia Lupinus Luzula Lychnis Lycium Lycopodiella Lycopodium Lycopus Lygodesmia Lysimachia Lythrum Maclura Madia Maianthemum Malaxis Malcolmia Malus Malva Marrubium Matricaria Matteuccia Mazus Medeola Medicago Melampyrum Melica Melilotus Menispermum Mentha Menyanthes Mertensia Milium Mimosa Mimulus Minuartia Mirabilis Miscanthus Mitchella Mitella Moehringia Molinia Mollugo Monarda Moneses Monotropa Morus Muhlenbergia Muscari Myosotis Myosoton Myosurus Myrica Myriophyllum Najas Napaea Narcissus Nassella Nasturtium Nelumbo Neobeckia Nepeta Neslia Nicandra Nicotiana Nothocalais Nuphar Nuttallanthus Nymphaea Nyssa Ocimum Odontites Oenothera Oligoneuron Omalotheca Onobrychis Onoclea Onopordum Onosmodium Ophioglossum Opuntia Ornithogalum Orobanche Orthilia Oryzopsis Osmorhiza Osmunda Ostrya Oxalis Oxypolis Oxytropis Packera Panax Panicum Papaver Parietaria Parnassia Paronychia Parthenium Parthenocissus Pascopyrum Paspalum Pastinaca Pedicularis Pediomelum Pellaea Peltandra Pennisetum Penstemon Penthorum Perilla Petasites Petrorhagia Petunia Phacelia Phalaris Phegopteris Phemeranthus Philadelphus Phleum Phlox Photinia Phragmites Phryma Phyla Physalis Physocarpus Physostegia Phytolacca Picea Pilea Pimpinella Pinguicula Pinus Piptatherum Plagiobothrys Plantago Platanthera Platanus Pluchea Poa Podophyllum Pogonia Polanisia Polemonium Polygala Polygonatum Polygonella Polygonum Polymnia Polypodium Polypogon Polystichum Polytaenia Pontederia Populus Portulaca Potamogeton Potentilla Prenanthes Primula Proserpinaca Prunella Prunus Pseudognaphalium Pseudolysimachion Psoralidium Ptelea Pteridium Pterospora Puccinellia Pulsatilla Pycnanthemum Pyrola Pyrus Quercus Ranunculus Raphanus Rapistrum Ratibida Reseda Rhamnus Rheum Rhexia Rhinanthus Rhododendron Rhodotypos Rhus Rhynchospora Ribes Robinia Rorippa Rosa Rotala Rubus Rudbeckia Ruellia Rumex Ruppia Ruta Sabatia Sagina Sagittaria Salix Salsola Salvia Sambucus Samolus Sanguinaria Sanguisorba Sanicula Saponaria Sarracenia Sassafras Satureja Saururus Saxifraga Schedonnardus Schedonorus Scheuchzeria Schizachne Schizachyrium Schoenoplectus Scilla Scirpus Scleranthus Scleria Scrophularia Scutellaria Secale Securigera Sedum Selaginella Senecio Senna Sesamum Setaria Shepherdia Sherardia Sibbaldiopsis Sicyos Silene Silphium Sinapis Sisymbrium Sisyrinchium Sium Smilax Solanum Solidago Sonchus Sorbaria Sorbus Sorghastrum Sorghum Sparganium Spartina Spergula Spergularia Sphenopholis Spiraea Spiranthes Spirodela Sporobolus Stachys Staphylea Stellaria Streptopus Strophostyles Stuckenia Stylosanthes Suaeda Sullivantia Symphoricarpos Symphyotrichum Symphytum Symplocarpus Syringa Taenidia Tagetes Tanacetum Taraxacum Taxus Tephrosia Tetragonia Teucrium Thalictrum Thaspium Thelypteris Thermopsis Thlaspi Thuja Thymelaea Thymus Tiarella Tilia Torilis Torreyochloa Toxicodendron Tradescantia Tragopogon Triadenum Triantha Tribulus Trichophorum Trichostema Tridens Trientalis Trifolium Triglochin Trillium Triodanis Triosteum Triphora Triplasis Tripleurospermum Trisetum Triticum Tsuga Tussilago Typha Ulmus Urtica Utricularia Uvularia Vaccaria Vaccinium Valeriana Valerianella Vallisneria Ventenata Verbascum Verbena Verbesina Vernonia Veronica Veronicastrum Viburnum Vicia Vinca Viola Vitis Vulpia Waldsteinia Wolffia Wolffiella Woodsia Xanthium Xyris Yucca Zannichellia Zanthoxylum Zea Zigadenus Zizania Zizia