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 Lamiaceae Ranunculaceae Acoraceae Actinidiaceae Pteridaceae Fumariaceae Adoxaceae Poaceae Apiaceae Hippocastanaceae Scrophulariaceae Rosaceae Caryophyllaceae Simaroubaceae Lardizabalaceae Fabaceae Liliaceae Alismataceae Brassicaceae Betulaceae Amaranthaceae Orchidaceae Vitaceae Boraginaceae Apocynaceae Primulaceae Ericaceae Araliaceae Viscaceae Papaveraceae Araceae Aristolochiaceae Asclepiadaceae Annonaceae Rubiaceae Aspleniaceae Saxifragaceae Dryopteridaceae Chenopodiaceae Solanaceae Azollaceae Gentianaceae Iridaceae Berberidaceae Urticaceae Ophioglossaceae Cabombaceae Moraceae Buddlejaceae Cyperaceae Butomaceae Buxaceae Callitrichaceae Calycanthaceae Convolvulaceae Campanulaceae Bignoniaceae Cannaceae Cannabaceae Sapindaceae Juglandaceae Fagaceae Rhamnaceae Celastraceae Ulmaceae Ceratophyllaceae Cercidiphyllaceae Cupressaceae Onagraceae Pyrolaceae Oleaceae Cucurbitaceae Portulacaceae Capparaceae Clethraceae Polemoniaceae Santalaceae Commelinaceae Myricaceae Orobanchaceae Empetraceae Cornaceae Anacardiaceae Crassulaceae Lythraceae Cuscutaceae Thymelaeaceae Hydrangeaceae Dennstaedtiaceae Diapensiaceae Rutaceae Caprifoliaceae Dioscoreaceae Ebenaceae Dipsacaceae Droseraceae Hydrocharitaceae Pontederiaceae Elaeagnaceae Elatinaceae Hydrophyllaceae Equisetaceae Eriocaulaceae Polygonaceae Geraniaceae Limnanthaceae Ginkgoaceae Verbenaceae Styracaceae Hamamelidaceae Cistaceae Hippuridaceae Lycopodiaceae Violaceae Clusiaceae Aquifoliaceae Balsaminaceae Isoetaceae Juncaceae Acanthaceae Haemodoraceae Lemnaceae Plumbaginaceae Lauraceae Linaceae Magnoliaceae Plantaginaceae Lygodiaceae Marsileaceae Meliaceae Sterculiaceae Menispermaceae Menyanthaceae Nyctaginaceae Molluginaceae Monotropaceae Haloragaceae Najadaceae Nelumbonaceae Nymphaeaceae Cactaceae Osmundaceae Oxalidaceae Paeoniaceae Thelypteridaceae Phytolaccaceae Lentibulariaceae Platanaceae Polypodiaceae Podostemaceae Polygalaceae Salicaceae Potamogetonaceae Pedaliaceae Resedaceae Melastomataceae Grossulariaceae Ruppiaceae Salviniaceae Sarraceniaceae Saururaceae Scheuchzeriaceae Schizaeaceae Selaginellaceae Aizoaceae Smilacaceae Sparganiaceae Staphyleaceae Symplocaceae Taxaceae Tiliaceae Trapaceae Zygophyllaceae Hymenophyllaceae Juncaginaceae Typhaceae Valerianaceae Vittariaceae Blechnaceae Xyridaceae Agavaceae Zannichelliaceae Zosteraceae
Abies Abutilon Acalypha Acanthospermum Acer Achillea Acinos Aconitum Acorus Actaea Actinidia Adiantum Adlumia Adonis Adoxa Aegilops Aegopodium Aesculus Aethusa Agalinis Agastache Ageratina Agrimonia Agropyron Agrostemma Agrostis Ailanthus Aira Ajuga Akebia Albizia Alcea Alchemilla Aletris Alisma Alliaria Allium Alnus Alopecurus Alternanthera Althaea Alyssum Amaranthus Ambrosia Amelanchier Amerorchis Amianthium Ammophila Amorpha Ampelopsis Amphicarpaea Amphicarpum Amsinckia Amsonia Anagallis Anaphalis Anchusa Andromeda Andropogon Androsace Anemone Anethum Angelica Anoda Antennaria Anthemis Anthoxanthum Anthriscus Anthyllis Antirrhinum Apera Aphanes Apios Apium Aplectrum Apocynum Aquilegia Arabidopsis Arabis Aralia Arceuthobium Arctium Arctostaphylos Arenaria Arethusa Argemone Argentina Arisaema Aristida Aristolochia Armoracia Arnica Arnoglossum Arnoseris Arrhenatherum Artemisia Arthraxon Aruncus Arundinaria Asarum Asclepias Asimina Asparagus Asperugo Asperula Asplenium Astilbe Astragalus Athyrium Atriplex Atropa Aureolaria Aurinia Avena Axyris Azolla Baccharis Ballota Baptisia Barbarea Bartonia Bassia Beckmannia Belamcanda Bellis Berberis Berteroa Berula Beta Betula Bidens Blephilia Boehmeria Boltonia Borago Bothriochloa Botrychium Bouteloua Brachyelytrum Brasenia Brassica Briza Bromus Broussonetia Brunnera Buchnera Buddleja Buglossoides Bulbostylis Bunias Bupleurum Butomus Buxus Cabomba Cakile Calamagrostis Calamintha Calamovilfa Calendula Calla Callistephus Callitriche Calluna Calopogon Caltha Calycanthus Calypso Calystegia Camelina Campanula Campanulastrum Campsis Canna Cannabis Capsella Capsicum Cardamine Cardaria Cardiospermum Carduus Carex Carlina Carpinus Carum Carya Castanea Castilleja Catalpa Catapodium Caulophyllum Ceanothus Celastrus Celtis Cenchrus Centaurea Centaurium Centromadia Cephalanthus Cerastium Ceratocephala Ceratophyllum Cercidiphyllum Cercis Chaenactis Chaenomeles Chaenorhinum Chaerophyllum Chamaecrista Chamaecyparis Chamaedaphne Chamaelirium Chamaemelum Chamaesyce Chamerion Chasmanthium Cheilanthes Chelidonium Chelone Chenopodium Chimaphila Chionanthus Chloris Chondrilla Chrysanthemum Chrysogonum Chrysopsis Chrysosplenium Cicer Cichorium Cicuta Cinna Circaea Cirsium Citrullus Cladium Cladrastis Claytonia Clematis Cleome Clethra Clinopodium Clintonia Clitoria Cnicus Coincya Coix Colchicum Collinsia Collinsonia Collomia Colutea Comandra Comarum Commelina Comptonia Conioselinum Conium Conoclinium Conopholis Conringia Consolida Convallaria Convolvulus Conyza Coptis Corallorhiza Corema Coreopsis Coriandrum Corispermum Cornus Coronopus Corydalis Corylus Corynephorus Cosmos Cotinus Cotoneaster Crassula Crataegus Crepis Crocus Crotalaria Cruciata Crypsis Cryptogramma Cryptotaenia Cucumis Cucurbita Cunila Cuphea Cuscuta Cyclachaena Cycloloma Cyclospermum Cydonia Cymbalaria Cynanchum Cynodon Cynoglossum Cynosurus Cyperus Cypripedium Cyrtomium Cystopteris Cytisus Dactylis Dactyloctenium Dactylorhiza Dalea Dalibarda Danthonia Daphne Dasiphora Datura Daucus Decodon Decumaria Dennstaedtia Deparia Deschampsia Descurainia Desmodium Deutzia Dianthus Diapensia Diarrhena Dicentra Dichanthelium Dictamnus 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 Echinodorus Echinops Echium Eclipta Egeria Eichhornia Elaeagnus Elatine Eleocharis Eleusine Ellisia Elodea Elsholtzia Elymus Empetrum Enemion Epifagus Epigaea Epilobium Epipactis Equisetum Eragrostis Eranthis Erechtites Eremopyrum Ericameria Erigenia Erigeron Eriocaulon Eriochloa Eriodictyon Eriogonum 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 Fuirena Fumaria Gaillardia Galactia Galanthus Galax Galearis Galega Galeopsis Galinsoga Galium Gamochaeta Gaultheria Gaura Gaylussacia Genista Gentiana Gentianella Gentianopsis Geocaulon Geranium Geum Gilia Gillenia Ginkgo Glandularia Glaucium Glaux Glebionis Glechoma Gleditsia Glyceria Glycine Glycyrrhiza Gnaphalium Gomphrena Goodyera Gratiola Grindelia Guizotia Gutierrezia Gymnocarpium Gymnocladus Gypsophila Hackelia Halenia Halesia Hamamelis Harrimanella Hasteola Hedeoma Hedera Helenium Helianthemum Helianthus Heliomeris Heliopsis Heliotropium Helleborus Helonias Hemerocallis Hepatica Heracleum Herniaria Hesperis Hesperostipa Heteranthera Heterotheca Heuchera Hexastylis Hibiscus Hieracium Hierochloe Hippuris Holcus Holosteum Honckenya Hordeum Hosta Hottonia Houstonia Hudsonia Humulus Huperzia Hyacinthoides Hybanthus Hydrangea Hydrastis Hydrocharis Hydrocotyle Hydrophyllum Hylotelephium Hyoscyamus Hypericum Hypochaeris Hypoxis Hyssopus Iberis Ilex Impatiens Inula Ionactis Ipomoea Ipomopsis Iris Isatis Isoetes Isotria Iva Ixeris Jasione Jeffersonia Juglans Juncus Juniperus Justicia Kalmia Kerria Kickxia Knautia Koeleria Koelreuteria Kosteletzkya Krigia Kummerowia Kyllinga Lablab Lachnanthes Lactuca Lagenaria Lamiastrum Lamium Lamprocapnos Laportea Lappula Lapsana Larix Lathyrus Lavandula Lechea Ledum Leersia Lemna Lens Leontodon Leonurus Lepidium Leptochloa Lespedeza Leucanthemella Leucanthemum Leucojum Leucophysalis Leucospora Leucothoe Levisticum Leymus Liatris Ligusticum Ligustrum Lilaeopsis Lilium Limnobium Limonium Limosella Linaria Lindera Lindernia Linnaea Linum Liparis Lipocarpha Liquidambar Liriodendron Listera Lithospermum Littorella Lobelia Lobularia Logfia Loiseleuria Lolium Lonicera Lotus Ludwigia Lunaria Lupinus Luzula Lychnis Lycium Lycopodiella Lycopodium Lycopus Lygodium Lyonia Lysimachia Lythrum Machaeranthera Macleaya Maclura Madia Magnolia Mahonia Maianthemum Malacothrix Malaxis Malus Malva Marrubium Marsilea Matricaria Matteuccia Mazus Medeola Medicago Melampyrum Melia Melica Melilotus Melissa Melochia Menispermum Mentha Menyanthes Mercurialis Mertensia Mibora Micranthemum Microstegium Microthlaspi Mikania Milium Mimulus Minuartia Mirabilis Miscanthus Misopates Mitchella Mitella Moehringia Molinia Mollugo Moluccella Monarda Moneses Monolepis Monotropa Morella Morus Muhlenbergia Muscari Mycelis Myosotis Myosoton Myrica Myriophyllum Najas Narcissus Nardus Nassella Nasturtium Nelumbo Neobeckia Nepeta Neslia Nicandra Nicotiana Nigella Nipponanthemum Nonea Nothocalais Nuphar Nuttallanthus Nymphaea Nymphoides Nyssa Ocimum Oclemena Odontites Oenothera Oldenlandia Oligoneuron Omalotheca Onobrychis Onoclea Ononis Onopordum Onosmodium Ophioglossum Opuntia Origanum Ornithogalum Ornithopus Orobanche Orontium Orthilia Orthocarpus Oryzopsis Osmorhiza Osmunda Ostrya Oxalis Oxydendrum Oxypolis Pachysandra Packera Paeonia Panax Panicum Papaver Pappophorum Parietaria Parnassia Paronychia Parthenium Parthenocissus Pascopyrum Paspalum Pastinaca Paulownia Pedicularis Pediomelum Pellaea Peltandra Pennisetum Penstemon Penthorum Perilla Periploca Petasites Petrorhagia Petroselinum Petunia Peucedanum Phacelia Phalaris Phaseolus Phegopteris Phellodendron Philadelphus Phleum Phlomis Phlox Phoradendron Photinia Phragmites Phryma Phyla Physalis Physocarpus Physostegia Phytolacca Picea Picris Pilea Pimpinella Pinellia Pinguicula Pinus Piptatherum Piptochaetium Pistia Pisum Pityopsis Plantago Platanthera Platanus Platycodon Pleopeltis Pluchea Poa Podophyllum Podostemum Pogonia Polanisia Polemonium Polycnemum Polygala Polygonatum Polygonella Polygonum Polymnia Polypodium Polypogon Polypremum Polystichum Pontederia Populus Portulaca Potamogeton Potentilla Prenanthella Prenanthes Primula Proboscidea Prosartes Proserpinaca Prunella Prunus Pseudofumaria Pseudognaphalium Pseudolysimachion Pseudotsuga Ptelea Pteridium Pteris Pterospora Ptilimnium Puccinellia Pueraria Pulmonaria Pycnanthemum Pyracantha Pyrola Pyrularia Pyrus Pyxidanthera Quercus Ranunculus Raphanus Rapistrum Ratibida Reseda Rhamnus Rheum Rhexia Rhinanthus Rhodiola Rhododendron Rhodotypos Rhus Rhynchospora Ribes Ricinus Robinia Rorippa Rosa Rostraria Rotala Rubia Rubus Rudbeckia Rumex Ruppia Ruta Sabatia Saccharum Sagina Sagittaria Salicornia Salix Salsola Salvia Salvinia Sambucus Samolus Sanguinaria Sanguisorba Sanicula Saponaria Sarcocornia Sarracenia Sassafras Satureja Saururus Saxifraga Scabiosa Schedonorus Scheuchzeria Schizachne Schizachyrium Schizaea Schizanthus Schoenoplectus Schwalbea Scilla Scirpoides Scirpus Scleranthus Scleria Sclerochloa Scolymus Scrophularia Scutellaria Secale Securigera Sedum Selaginella Sempervivum Senecio Senna Sericocarpus Serratula Sesamum Sesbania Sesuvium Setaria Shepherdia Sherardia Sibbaldiopsis Sicyos Sida Sidalcea Silene Silphium Silybum Sinapis Sisymbrium Sisyrinchium Sium Smallanthus Smilax Solanum Solidago Sonchus Sorbaria Sorbus Sorghastrum Sorghum Sparganium Spartina Spergula Spergularia Spermolepis Sphenopholis Spinacia Spiraea Spiranthes Spirodela Sporobolus Stachys Staphylea Stellaria Stephanomeria Streptopus Strophostyles Stuckenia Stylosanthes Styrax Suaeda Subularia Succisella Symphoricarpos Symphyotrichum Symphytum Symplocarpus Symplocos Syringa Taeniatherum Taenidia Tagetes Tanacetum Taraxacum Taxodium Taxus Teesdalia Tephrosia Tetragonia Teucrium Thalictrum Thaspium Thelypteris Thermopsis Thinopyrum Thladiantha Thlaspi Thuja Thymus Tiarella Tilia Tipularia Torilis Torreyochloa Toxicodendron Tradescantia Tragopogon Tragus Trapa Triadenum Triantha Tribulus Trichloris Trichomanes Trichophorum Trichostema Tridens Trientalis Trifolium Triglochin Trigonella Trillium Triodanis Triosteum Triphora Triplasis Tripleurospermum Tripolium Tripsacum Trisetum Triticum Trollius Tsuga Tussilago Typha Ulex Ulmus Urtica Utricularia Uvularia Vaccaria Vaccinium Vahlodea Valeriana Valerianella Vallisneria Ventenata Veratrum Verbascum Verbena Verbesina Vernonia Veronica Veronicastrum Viburnum Vicia Vinca Viola Vitis Vittaria Vulpia Waldsteinia Weigela Wisteria Wolffia Woodsia Woodwardia Xanthium Xanthorhiza Xyris Yucca Zannichellia Zanthoxylum Zea Zigadenus Zizania Zizia Zostera Zygophyllum