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 Ranunculaceae Acoraceae Pteridaceae Fumariaceae Poaceae Apiaceae Hippocastanaceae Scrophulariaceae Lamiaceae Rosaceae Caryophyllaceae Simaroubaceae Lardizabalaceae Fabaceae Liliaceae Alismataceae Brassicaceae Betulaceae Amaranthaceae Lythraceae Vitaceae Apocynaceae Primulaceae Ericaceae Orchidaceae Araliaceae Papaveraceae Araceae Aristolochiaceae Asclepiadaceae Annonaceae Aspleniaceae Dryopteridaceae Chenopodiaceae Azollaceae Gentianaceae Iridaceae Berberidaceae Bignoniaceae Urticaceae Ophioglossaceae Cabombaceae Moraceae Boraginaceae Cyperaceae Butomaceae Callitrichaceae Menispermaceae Onagraceae Convolvulaceae Campanulaceae Cannabaceae Sapindaceae Juglandaceae Fagaceae Rhamnaceae Celastraceae Ulmaceae Rubiaceae Ceratophyllaceae Pyrolaceae Saxifragaceae Cucurbitaceae Portulacaceae Capparaceae Polemoniaceae Santalaceae Commelinaceae Myricaceae Orobanchaceae Cornaceae Cuscutaceae Solanaceae Dennstaedtiaceae Acanthaceae Caprifoliaceae Dioscoreaceae Ebenaceae Dipsacaceae Thymelaeaceae Droseraceae Hydrocharitaceae Elaeagnaceae Hydrophyllaceae Equisetaceae Eriocaulaceae Polygonaceae Geraniaceae Limnanthaceae Oleaceae Verbenaceae Styracaceae Hamamelidaceae Cistaceae Pontederiaceae Hippuridaceae Lycopodiaceae Violaceae Hydrangeaceae Crassulaceae Clusiaceae Aquifoliaceae Balsaminaceae Isoetaceae Grossulariaceae Juncaceae Cupressaceae Lemnaceae Lauraceae Linaceae Magnoliaceae Lygodiaceae Agavaceae Marsileaceae Loasaceae Menyanthaceae Nyctaginaceae Molluginaceae Monotropaceae Haloragaceae Najadaceae Nelumbonaceae Nymphaeaceae Cactaceae Osmundaceae Oxalidaceae Buxaceae Passifloraceae Thelypteridaceae Viscaceae Phytolaccaceae Plantaginaceae Platanaceae Polypodiaceae Polygalaceae Buddlejaceae Salicaceae Potamogetonaceae Pedaliaceae Rutaceae Resedaceae Melastomataceae Anacardiaceae Sarraceniaceae Saururaceae Scheuchzeriaceae Selaginellaceae Sapotaceae Smilacaceae Sparganiaceae Loganiaceae Staphyleaceae Taxaceae Tiliaceae Zygophyllaceae Hymenophyllaceae Juncaginaceae Typhaceae Lentibulariaceae Valerianaceae Vittariaceae Blechnaceae Xyridaceae Zannichelliaceae
Abies Abutilon Acalypha Acer Achillea Aconitum Acorus Acroptilon Actaea Adiantum Adlumia Aegilops Aegopodium Aesculus Aethusa Agalinis Agastache Ageratina Agrimonia Agropyron Agrostemma Agrostis Ailanthus Aira Ajuga Akebia Albizia Alcea Aletris Alisma Alliaria Allium Alnus Alopecurus Alyssum Amaranthus Amberboa Ambrosia Amelanchier Ammannia Ammophila Amorpha Ampelopsis Amphiachyris Amphicarpaea Amsonia Anagallis Anaphalis Andromeda Andropogon Androsace Anemone Anethum Angelica Anoda Antennaria Anthemis Anthoxanthum Anthriscus Apera Apios Aplectrum Apocynum Aquilegia Arabidopsis Arabis Aralia Arctium Arctostaphylos Arenaria Arethusa Argemone Argentina Arisaema Aristida Aristolochia Armoracia Arnoglossum Arrhenatherum Artemisia Arthraxon Aruncus Arundinaria Asarum Asclepias Asimina Asparagus Asplenium Astragalus Athyrium Atriplex Aureolaria Avena Azolla Bacopa Baptisia Barbarea Bartonia Bassia Belamcanda Bellis Berberis Berteroa Besseya Betula Bidens Bignonia Blephilia Boehmeria Boltonia Botrychium Bouteloua Brachyelytrum Brasenia Brassica Brickellia Bromus Broussonetia Buchnera Buglossoides Bulbostylis Bupleurum Butomus Cabomba Cakile Calamagrostis Calamovilfa Calla Callirhoe Callitriche Calopogon Caltha Calycocarpum Calylophus Calystegia Camassia Camelina Campanula Campanulastrum Campsis Cannabis Capsella Caragana Cardamine Cardaria Cardiospermum Carduus Carex Carpinus Carum Carya Castanea Castilleja Catalpa Caulophyllum Ceanothus Celastrus Celosia Celtis Cenchrus Centaurea Centaurium Cephalanthus Cerastium Ceratocephala Ceratophyllum Cercis Chaenorhinum Chaerophyllum Chaiturus Chamaecrista Chamaedaphne Chamaelirium Chamaemelum Chamaesyce Chamerion Chasmanthium Cheilanthes Chelidonium Chelone Chenopodium Chimaphila Chloris Chondrilla Chorispora Chrysosplenium Cichorium Cicuta Cinna Circaea Cirsium Citrullus Cladium Cladrastis Claytonia Clematis Cleome Clinopodium Clintonia Clitoria Cocculus Collinsia Collinsonia Collomia Comandra Comarum Commelina Comptonia Conioselinum Conium Conoclinium Conopholis Conringia Consolida Convallaria Convolvulus Conyza Coptis Corallorhiza Coreopsis Corispermum Cornus Coronopus Corydalis Corylus Cotoneaster Crataegus Crepis Crotalaria Croton Cruciata Crypsis Cryptotaenia Cucurbita Cunila Cuphea Cuscuta Cyclachaena Cycloloma Cymbalaria Cynanchum Cynodon Cynoglossum Cyperus Cypripedium Cystopteris Dactylis Dactylorhiza Dalea Danthonia Dasiphora Dasistoma Datura Daucus Decodon Delphinium Dennstaedtia Deparia Deschampsia Descurainia Desmanthus Desmodium Dianthus Diarrhena Dicentra Dichanthelium Dicliptera Didiplis Diervilla Digitalis Digitaria Diodia Dioscorea Diospyros Diplazium Diplotaxis Dipsacus Dirca Dodecatheon Doellingeria Draba Dracocephalum Drosera Dryopteris Duchesnea Dulichium Dyssodia Echinacea Echinochloa Echinocystis Echinodorus Echinops Echium Eclipta Egeria Elaeagnus Eleocharis Elephantopus Eleusine Eleutherococcus Ellisia Elodea Elymus Enemion Epifagus Epigaea Epilobium Epipactis Equisetum Eragrostis Erechtites Erigenia Erigeron Eriocaulon Eriochloa Eriodictyon Eriogonum Eriophorum Erodium Erucastrum Eryngium Erysimum Erythronium Euonymus Eupatoriadelphus Eupatorium Euphorbia Eurybia Euthamia Fagopyrum Fagus Fatoua Festuca Filipendula Fimbristylis Fleischmannia Floerkea Forestiera Forsythia Fragaria Frangula Frasera Fraxinus Froelichia Fuirena Fumaria Gaillardia Galactia Galearis Galeopsis Galinsoga Galium Gamochaeta Gaultheria Gaura Gaylussacia Gentiana Gentianella Gentianopsis Geranium Geum Gillenia Glandularia Glechoma Gleditsia Glyceria Glycine Glycyrrhiza Gnaphalium Goodyera Gratiola Grindelia Gymnocladus Gymnopogon Gypsophila Hackelia Halesia Hamamelis Hasteola Hedeoma Hedera Helenium Helianthemum Helianthus Heliopsis Heliotropium Hemerocallis Hepatica Heracleum Hesperis Hesperostipa Heteranthera Heterotheca Heuchera Hexalectris Hibiscus Hieracium Hierochloe Hippuris Holcus Holosteum Hordeum Hosta Hottonia Houstonia Hudsonia Humulus Huperzia Hyacinthoides Hybanthus Hydrangea Hydrastis Hydrocotyle Hydrolea Hydrophyllum Hylotelephium Hymenocallis Hymenopappus Hyoscyamus Hypericum Hypochaeris Hypoxis Ilex Iliamna Impatiens Inula Iodanthus Ionactis Ipomoea Ipomopsis Iresine Iris Isoetes Isotria Itea Iva Jeffersonia Juglans Juncus Juniperus Justicia Kalmia Kickxia Koeleria Koelreuteria Krigia Kummerowia Kyllinga Lactuca Lagerstroemia Lamium Lamprocapnos Laportea Lappula Lapsana Larix Lathyrus Leavenworthia Lechea Leersia Lemna Lens Leontodon Leonurus Lepidium Leptochloa Lespedeza Lesquerella Leucanthemum Leucojum Leucospora Leymus Liatris Ligusticum Ligustrum Lilium Limnobium Linaria Lindera Lindernia Linnaea Linum Liparis Lipocarpha Liquidambar Liriodendron Lithospermum Lobelia Lobularia Lolium Lonicera Lotus Ludwigia Lunaria Lupinus Luzula Lychnis Lycium Lycopodiella Lycopodium Lycopus Lygodesmia Lygodium Lysimachia Lythrum Macleaya Maclura Madia Magnolia Mahonia Maianthemum Malaxis Malus Malva Manfreda Marrubium Marsilea Matelea Matricaria Matteuccia Medeola Medicago Melampyrum Melica Melilotus Melissa Melothria Menispermum Mentha Mentzelia Menyanthes Mertensia Microstegium Microthlaspi Mikania Milium Mimulus Minuartia Mirabilis Mitchella Mitella Moehringia Mollugo Monarda Monotropa Morus Mosla Muhlenbergia Muscari Myosotis Myosoton Myosurus Myriophyllum Najas Napaea Narcissus Nasturtium Nelumbo Neobeckia Nepeta Neslia Nicandra Nothoscordum Nuphar Nuttallanthus Nymphaea Nymphoides Nyssa Obolaria Oenothera Oligoneuron Onoclea Onopordum Onosmodium Ophioglossum Opuntia Orbexilum Ornithogalum Orobanche Orthilia Oryzopsis Osmorhiza Osmunda Ostrya Oxalis Oxydendrum Oxypolis Pachysandra Packera Panax Panicum Papaver Parietaria Parnassia Paronychia Parthenium Parthenocissus Pascopyrum Paspalum Passiflora Pastinaca Paulownia Pedicularis Pellaea Peltandra Pennisetum Penstemon Penthorum Perideridia Perilla Petunia Phacelia Phalaris Phaseolus Phegopteris Phemeranthus Philadelphus Phleum Phlox Phoradendron Photinia Phragmites Phryma Phyla Phyllanthus Physalis Physocarpus Physostegia Phytolacca Pilea Pimpinella Pinus Piptatherum Piptochaetium Plantago Platanthera Platanus Pleopeltis Pluchea Poa Podophyllum Pogonia Polanisia Polemonium Polygala Polygonatum Polygonella Polygonum Polymnia Polypodium Polypremum Polystichum Polytaenia Pontederia Populus Portulaca Potamogeton Potentilla Prenanthes Proboscidea Proserpinaca Prunella Prunus Pseudognaphalium Psoralidium Ptelea Pteridium Pteris Puccinellia Pueraria Pycnanthemum Pyrola Pyrrhopappus Pyrus Quercus Ranunculus Raphanus Rapistrum Ratibida Reseda Rhamnus Rheum Rhexia Rhodotypos Rhus Rhynchospora Ribes Richardia Robinia Rorippa Rosa Rotala Rottboellia Rubus Rudbeckia Ruellia Rumex Sabatia Saccharum Sagina Sagittaria Salix Salsola Salvia Sambucus Samolus Sanguinaria Sanguisorba Sanicula Saponaria Sarracenia Sassafras Satureja Saururus Saxifraga Schedonorus Scheuchzeria Schizachne Schizachyrium Schoenoplectus Scilla Scirpus Scleranthus Scleria Sclerochloa Scrophularia Scutellaria Secale Securigera Sedum Selaginella Senecio Senna Sericocarpus Setaria Shepherdia Sibara Sicyos Sida Sideroxylon Silene Silphium Silybum Sinapis Sisymbrium Sisyrinchium Sium Smallanthus Smilax Solanum Solidago Sonchus Sorbaria Sorbus Sorghastrum Sorghum Sparganium Spartina Spergula Spergularia Spermacoce Spermolepis Sphenopholis Spigelia Spiraea Spiranthes Spirodela Sporobolus Stachys Staphylea Stellaria Stenanthium Stenaria Stenosiphon Strophostyles Stuckenia Stylophorum Stylosanthes Styrax Suaeda Sullivantia Symphoricarpos Symphyotrichum Symphytum Symplocarpus Synandra Syringa Taenidia Tanacetum Taraxacum Taxodium Taxus Teesdalia Tephrosia Teucrium Thalictrum Thaspium Thelesperma Thelypteris Thlaspi Thuja Thymus Tilia Tipularia Torilis Torreyochloa Toxicodendron Trachelospermum Tradescantia Tragia Tragopogon Trautvetteria Triadenum Triantha Tribulus Trichomanes Trichostema Tridens Trientalis Trifolium Triglochin Trillium Triodanis Triosteum Triphora Triplasis Tripsacum Triticum Tsuga Tussilago Typha Ulmus Urtica Utricularia Uvularia Vaccaria Vaccinium Valeriana Valerianella Vallisneria Veratrum Verbascum Verbena Verbesina Vernonia Veronica Veronicastrum Viburnum Vicia Vigna Vinca Viola Vitis Vittaria Vulpia Waldsteinia Wisteria Wolffia Wolffiella Woodsia Woodwardia Xanthium Xyris Yucca Zannichellia Zanthoxylum Zea Zigadenus Zizania Zizia Zoysia