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 Apiaceae Scrophulariaceae Rosaceae Caryophyllaceae Poaceae Alismataceae Brassicaceae Liliaceae Betulaceae Amaranthaceae Orchidaceae Fabaceae Primulaceae Ericaceae Apocynaceae Araliaceae Viscaceae Papaveraceae Araceae Aristolochiaceae Asclepiadaceae Aspleniaceae Dryopteridaceae Chenopodiaceae Gentianaceae Iridaceae Berberidaceae Urticaceae Boraginaceae Ophioglossaceae Cabombaceae Cyperaceae Butomaceae Callitrichaceae Onagraceae Convolvulaceae Campanulaceae Cannabaceae Juglandaceae Fagaceae Bignoniaceae Rhamnaceae Celastraceae Ulmaceae Rubiaceae Ceratophyllaceae Pyrolaceae Saxifragaceae Cucurbitaceae Portulacaceae Polemoniaceae Santalaceae Commelinaceae Myricaceae Orobanchaceae Cornaceae Anacardiaceae Crassulaceae Lythraceae Cuscutaceae Thymelaeaceae Solanaceae Dennstaedtiaceae Hydrangeaceae Diapensiaceae Rutaceae Caprifoliaceae Dioscoreaceae Dipsacaceae Droseraceae Hydrocharitaceae Elaeagnaceae Elatinaceae Empetraceae Equisetaceae Eriocaulaceae Polygonaceae Geraniaceae Limnanthaceae Oleaceae Hamamelidaceae Cistaceae Pontederiaceae Hippuridaceae Lycopodiaceae Violaceae Hydrophyllaceae Clusiaceae Aquifoliaceae Balsaminaceae Isoetaceae Juncaceae Cupressaceae Acanthaceae Lemnaceae Lauraceae Linaceae Magnoliaceae Plantaginaceae Lygodiaceae Menispermaceae Menyanthaceae Nyctaginaceae Molluginaceae Monotropaceae Moraceae Haloragaceae Najadaceae Nymphaeaceae Osmundaceae Oxalidaceae Paeoniaceae Vitaceae Thelypteridaceae Verbenaceae Phytolaccaceae Lentibulariaceae Platanaceae Podostemaceae Capparaceae Polygalaceae Polypodiaceae Salicaceae Potamogetonaceae Pedaliaceae Resedaceae Melastomataceae Grossulariaceae Ruppiaceae Sarraceniaceae Scheuchzeriaceae Selaginellaceae Smilacaceae Sparganiaceae Staphyleaceae Taxaceae Tiliaceae Trapaceae Hymenophyllaceae Juncaginaceae Typhaceae Valerianaceae Blechnaceae Xyridaceae Zannichelliaceae
Abies Abutilon Acalypha Acer Achillea Acinos Aconitum Acorus Actaea Adiantum Adlumia Aegopodium Agalinis Agastache Ageratina Agrimonia Agrostemma Agrostis Aira Ajuga Alcea Alchemilla Alisma Alliaria Allium Alnus Alopecurus Alyssum Amaranthus Ambrosia Amelanchier Amerorchis Ammophila Amorpha Amphicarpaea Anagallis Anaphalis Andromeda Andropogon Anemone Angelica Antennaria Anthemis Anthoxanthum Anthriscus Anthyllis Apera Apios Aplectrum Apocynum Aquilegia Arabidopsis Arabis Aralia Arceuthobium Arctium Arctostaphylos Arenaria Arethusa Argemone Argentina Arisaema Aristida Aristolochia Armoracia Arnica Arrhenatherum Artemisia Asarum Asclepias Asparagus Asplenium Astragalus Athyrium Atriplex Aureolaria Aurinia Avena Avenula Baptisia Barbarea Bartonia Bassia Belamcanda Bellis Berberis Berteroa Betula Bidens Blephilia Boehmeria Boltonia Borago Botrychium Brachyelytrum Brasenia Brassica Briza Bromus Buglossoides Bulbostylis Bunias Bupleurum Butomus Calamagrostis Calla Callitriche Calluna Calopogon Caltha Calylophus Calypso Calystegia Camelina Campanula Cannabis Capsella Cardamine Cardaria Carduus Carex Carpinus Carum Carya Castanea Castilleja Catalpa Caulophyllum Ceanothus Celastrus Celosia Celtis Cenchrus Centaurea Centaurium Cephalanthus Cerastium Ceratophyllum Chaenomeles Chaenorhinum Chamaecrista Chamaedaphne Chamaesyce Chamerion Chelidonium Chelone Chenopodium Chimaphila Chrysosplenium Cicer Cichorium Cicuta Cinna Circaea Cirsium Citrullus Cladium Clarkia Claytonia Clematis Clinopodium Clintonia Colchicum Collinsia Collinsonia Collomia Comandra Comarum Commelina Comptonia Conioselinum Conium Conopholis Conringia Consolida Convallaria Convolvulus Conyza Coptis Corallorhiza Coreopsis Cornus Corydalis Corylus Cotinus Crassula Crataegus Crepis Crotalaria Crypsis Cryptogramma Cryptotaenia Cucurbita Cuphea Cuscuta Cyclachaena Cydonia Cymbalaria Cynanchum Cynoglossum Cynosurus Cyperus Cypripedium Cystopteris Dactylis Dactylorhiza Dalibarda Danthonia Daphne Dasiphora Datura Daucus Decodon Delphinium Dennstaedtia Deparia Deschampsia Descurainia Desmodium Deutzia Dianthus Diapensia Dicentra Dichanthelium Dictamnus Diervilla Digitalis Digitaria Dioscorea Diplazium Dipsacus Dirca Doellingeria Draba Dracocephalum Drosera Dryopteris Dulichium Dyssodia Echinochloa Echinocystis Echinops Echium Egeria Elaeagnus Elatine Eleocharis Eleusine Elodea Elsholtzia Elymus Empetrum Epifagus Epigaea Epilobium Epipactis Equisetum Eragrostis Erechtites Erigeron Eriocaulon Eriogonum Eriophorum Erodium Eruca Erucastrum Erysimum Erythronium Euonymus Eupatoriadelphus Eupatorium Euphorbia Euphrasia Eurybia Euthamia Fagopyrum Fagus Festuca Filipendula Fimbristylis Floerkea Fragaria Frangula Fraxinus Fumaria Gagea Gaillardia Galearis Galeopsis Galinsoga Galium Gaultheria Gaylussacia Genista Gentiana Gentianella Gentianopsis Geocaulon Geranium Geum Gilia Glebionis Glechoma Gleditsia Glyceria Gnaphalium Goodyera Gratiola Grindelia Gymnocarpium Gypsophila Hackelia Halenia Hamamelis Hedeoma Hedysarum Helenium Helianthemum Helianthus Heliopsis Hemerocallis Hepatica Heracleum Hesperis Heteranthera Hibiscus Hieracium Hierochloe Hippuris Holcus Holosteum Hordeum Hosta Houstonia Hudsonia Humulus Huperzia Hybanthus Hydrastis Hydrocotyle Hydrophyllum Hylotelephium Hyoscyamus Hypericum Hypochaeris Hypoxis Hyssopus Iberis Ilex Impatiens Inula Ionactis Ipomoea Iris Isoetes Isotria Juglans Juncus Juniperus Justicia Kalmia Knautia Koeleria Kolkwitzia Krigia Lactuca Lamium Laportea Lappula Lapsana Larix Lathyrus Lavandula Lavatera Lechea Ledum Leersia Lemna Leontodon Leonurus Lepidium Leptochloa Lespedeza Leucanthemum Leucophysalis Levisticum Ligustrum Lilium Linaria Lindera Lindernia Linnaea Linum Liparis Liriodendron Listera Lithospermum Littorella Lobelia Lobularia Lolium Lonicera Lotus Ludwigia Lunaria Lupinus Luzula Lychnis Lycium Lycopodiella Lycopodium Lycopus Lygodium Lyonia Lysimachia Lythrum Madia Maianthemum Malaxis Malus Malva Marrubium Matricaria Matteuccia Medeola Medicago Melampyrum Melilotus Melissa Menispermum Mentha Menyanthes Milium Mimulus Minuartia Mirabilis Mitchella Mitella Moehringia Molinia Mollugo Monarda Moneses Monotropa Morella Morus Muhlenbergia Muscari Mycelis Myosotis Myosoton Myrica Myriophyllum Najas Napaea Narcissus Nardus Nasturtium Neobeckia Neotorularia Nepeta Neslia Nicandra Nicotiana Nigella Nuphar Nuttallanthus Nymphaea Nymphoides Nyssa Oclemena Odontites Oenothera Oligoneuron Omalotheca Onobrychis Onoclea Onopordum Ophioglossum Origanum Ornithogalum Orobanche Orthilia Oryzopsis Osmorhiza Osmunda Ostrya Oxalis Packera Paeonia Panax Panicum Papaver Parietaria Parnassia Paronychia Parthenocissus Paspalum Pastinaca Pedicularis Pellaea Peltandra Pennisetum Penstemon Penthorum Petasites Petunia Phalaris Phegopteris Philadelphus Phleum Phlox Photinia Phragmites Phryma Phyllodoce Physalis Physocarpus Physostegia Phytolacca Picea Picris Pieris Pilea Pimpinella Pinguicula Pinus Piptatherum Plantago Platanthera Platanus Poa Podophyllum Podostemum Pogonia Polanisia Polemonium Polygala Polygonatum Polygonella Polygonum Polymnia Polypodium Polystichum Pontederia Populus Portulaca Potamogeton Potentilla Prenanthes Primula Proboscidea Proserpinaca Prunella Prunus Pseudognaphalium Pseudolysimachion Ptelea Pteridium Pterospora Puccinellia Pulmonaria Pycnanthemum Pyrola Pyrus Quercus Ranunculus Raphanus Ratibida Reseda Rhamnus Rheum Rhexia Rhinanthus Rhodiola Rhododendron Rhodotypos Rhus Rhynchospora Ribes Robinia Rorippa Rosa Rubus Rudbeckia Rumex Ruppia Ruta Sagina Sagittaria Salix Salsola Salvia Sambucus Samolus Sanguinaria Sanguisorba Sanicula Sanvitalia Saponaria Sarracenia Sassafras Satureja Saxifraga Schedonorus Scheuchzeria Schizachne Schizachyrium Schoenoplectus Scirpus Scleranthus Scrophularia Scutellaria Secale Securigera Sedum Selaginella Senecio Senna Sericocarpus 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 Stuckenia Subularia Symphoricarpos Symphyotrichum Symphytum Symplocarpus Syringa Taenidia Tagetes Tanacetum Taraxacum Taxus Teucrium Thalictrum Thelypteris Thermopsis Thlaspi Thuja Thymus Tiarella Tilia Torreyochloa Toxicodendron Tradescantia Tragopogon Trapa Triadenum Triantha Trichomanes Trichophorum Trichostema Tridens Trientalis Trifolium Triglochin Trillium Triodanis Triosteum Triphora Trisetum Triticum Tsuga Tussilago Typha Ulmus Urtica Utricularia Uvularia Vaccaria Vaccinium Vahlodea Valeriana Valerianella Vallisneria Veratrum Verbascum Verbena Veronica Veronicastrum Viburnum Vicia Vinca Viola Vitis Vulpia Waldsteinia Wisteria Wolffia Woodsia Woodwardia Xanthium Xyris Zannichellia Zanthoxylum Zea Zigadenus Zizania Zizia