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 Nyctaginaceae Malvaceae Aceraceae Asteraceae Poaceae Lamiaceae Ranunculaceae Pteridaceae Adoxaceae Scrophulariaceae Rosaceae Caryophyllaceae Apiaceae Polemoniaceae Alismataceae Liliaceae Betulaceae Brassicaceae Amaranthaceae Orchidaceae Lythraceae Fabaceae Boraginaceae Primulaceae Apocynaceae Araliaceae Viscaceae Ericaceae Papaveraceae Asclepiadaceae Aspleniaceae Dryopteridaceae Chenopodiaceae Berberidaceae Ophioglossaceae Callitrichaceae Onagraceae Convolvulaceae Campanulaceae Cannabaceae Cyperaceae Rhamnaceae Celastraceae Ulmaceae Gentianaceae Ceratophyllaceae Euphorbiaceae Pyrolaceae Portulacaceae Capparaceae Santalaceae Commelinaceae Saxifragaceae Cornaceae Fumariaceae Crassulaceae Cucurbitaceae Cuscutaceae Dipsacaceae Droseraceae Cactaceae Elaeagnaceae Elatinaceae Hydrophyllaceae Hydrocharitaceae Ephedraceae Equisetaceae Polygonaceae Geraniaceae Limnanthaceae Oleaceae Rubiaceae Verbenaceae Crossosomataceae Cistaceae Hippuridaceae Lycopodiaceae Solanaceae Clusiaceae Iridaceae Isoetaceae Hydrangeaceae Juncaceae Cupressaceae Lemnaceae Caprifoliaceae Linaceae Araceae Marsileaceae Loasaceae Menyanthaceae Molluginaceae Monotropaceae Moraceae Haloragaceae Najadaceae Nymphaeaceae Orobanchaceae Oxalidaceae Paeoniaceae Urticaceae Vitaceae Plantaginaceae Polygalaceae Polypodiaceae Salicaceae Potamogetonaceae Pedaliaceae Dennstaedtiaceae Fagaceae Resedaceae Anacardiaceae Grossulariaceae Ruppiaceae Scheuchzeriaceae Selaginellaceae Aizoaceae Smilacaceae Sparganiaceae Tamaricaceae Zygophyllaceae Juncaginaceae Typhaceae Lentibulariaceae Valerianaceae Violaceae Agavaceae Zannichelliaceae
Abies Abronia Abutilon Acer Achillea Achnatherum Acinos Aconitum Acroptilon Actaea Adenocaulon Adiantum Adoxa Aegilops Agalinis Agastache Agoseris Agrimonia Agropyron Agrostemma Agrostis Aira Alcea Aletes Aliciella Alisma Allium Almutaster Alnus Alopecurus Alyssum Amaranthus Ambrosia Amelanchier Amerorchis Ammannia Amorpha Amsinckia Anagallis Anaphalis Anchusa Andropogon Androsace Androstephium Anemone Angelica Antennaria Anthemis Antheropeas Anthriscus Apera Apocynum Aquilegia Arabis Aralia Arceuthobium Arctium Arctostaphylos Arenaria Argemone Argentina Argyrochosma Aristida Armoracia Arnica Arrhenatherum Artemisia Asclepias Asparagus Asperugo Aspidotis Asplenium Astragalus Athyrium Atriplex Avena Avenula Bacopa Bahia Balsamorhiza Barbarea Bassia Beckmannia Berberis Berteroa Berula Besseya Betula Bidens Botrychium Bouteloua Brassica Braya Brickellia Bromus Buglossoides Bupleurum Calamagrostis Calamovilfa Callirhoe Callitriche Calochortus Caltha Calylophus Calypso Calystegia Camassia Camelina Camissonia Campanula Cannabis Capsella Caragana Cardamine Cardaria Carduus Carex Carthamus Carum Castilleja Catabrosa Caulanthus Ceanothus Celastrus Celtis Cenchrus Centaurea Centaurium Cerastium Ceratocephala Ceratophyllum Cercocarpus Chaenactis Chaetopappa Chamaechaenactis Chamaerhodos Chamaesyce Chamerion Cheilanthes Chenopodium Chimaphila Chionophila Chloris Chorispora Chrysothamnus Cichorium Cicuta Cinna Circaea Cirsium Cistanthe Clarkia Claytonia Clematis Cleome Collinsia Collomia Comandra Comarum Commelina Conimitella Conioselinum Conium Conringia Convolvulus Conyza Corallorhiza Cordylanthus Coreopsis Corispermum Cornus Corydalis Corylus Cosmos Cotoneaster Crassula Crataegus Crepis Croton Crypsis Cryptantha Cryptogramma Cucurbita Cuscuta Cyclachaena Cycloloma Cymopterus Cynoglossum Cyperus Cypripedium Cystopteris Dactylis Dactylorhiza Dalea Danthonia Dasiphora Dasyochloa Daucus Delphinium Deschampsia Descurainia Dianthus Dicentra Dichanthelium Digitalis Digitaria Dipsacus Distichlis Dodecatheon Douglasia Downingia Draba Dracocephalum Drosera Dryas Dryopteris Dulichium Dyssodia Echinacea Echinocereus Echinochloa Echinocystis Echinops Echium Elaeagnus Elatine Eleocharis Ellisia Elodea Elyhordeum Elyleymus Elymus Endolepis Ephedra Epilobium Epipactis Equisetum Eragrostis Eremopyrum Eriastrum Ericameria Erigeron Eriodictyon Eriogonum Eriophorum Eriophyllum Eritrichium Erodium Eruca Erucastrum Erysimum Erythronium Eschscholzia Escobaria Eucephalus Euclidium Eupatoriadelphus Euphorbia Eurybia Eustoma Euthamia Evax Evolvulus Fagopyrum Falcaria Festuca Floerkea Fragaria Frangula Frasera Fraxinus Fritillaria Froelichia Fumaria Gaillardia Galeopsis Galinsoga Galium Gaultheria Gaura Gayophytum Gentiana Gentianella Gentianopsis Geranium Geum Gilia Glandularia Glaux Glechoma Gleditsia Glossopetalon Glyceria Glycyrrhiza Gnaphalium Goodyera Gratiola Grayia Grindelia Gutierrezia Gymnocarpium Gymnosteris Gypsophila Hackelia Halenia Halimolobos Halogeton Harbouria Hedeoma Hedysarum Helenium Helianthella Helianthemum Helianthus Helictotrichon Heliomeris Heliotropium Hemerocallis Heracleum Hesperis Hesperochiron Hesperostipa Heterocodon Heterotheca Heuchera Hibiscus Hieracium Hierochloe Hippuris Holodiscus Holosteum Hordeum Horkelia Hornungia Hulsea Humulus Huperzia Hydrophyllum Hymenopappus Hymenoxys Hyoscyamus Hypericum Iliamna Ionactis Ipomoea Ipomopsis Iris Isatis Isoetes Iva Ivesia Jamesia Juncus Juniperus Kalmia Kelloggia Kelseya Knautia Kobresia Koeleria Koenigia Krascheninnikovia Lactuca Lallemantia Lamium Lappula Larix Lathrocasis Lathyrus Lavatera Lechea Ledum Leersia Lemna Leonurus Lepidium Leptochloa Leptosiphon Lesquerella Leucanthemum Leucocrinum Leucopoa Lewisia Leymus Liatris Ligusticum Lilium Limosella Linanthus Linaria Linnaea Linum Lipocarpha Listera Lithophragma Lithospermum Lloydia Lobelia Lobularia Loeflingia Logfia Lolium Lomatium Lomatogonium Lonicera Lotus Lupinus Luzula Lycium Lycopodium Lycopus Lygodesmia Lysichiton Lysimachia Lythrum Machaeranthera Madia Mahonia Maianthemum Malacothrix Malcolmia Malus Malva Marrubium Marsilea Matricaria Medicago Melica Melilotus Mentha Mentzelia Menyanthes Menziesia Mertensia Microseris Microsteris Mimulus Minuartia Mirabilis Mitella Moehringia Mollugo Monarda Monardella Moneses Monolepis Monotropa Monroa Montia Morus Muhlenbergia Musineon Myosotis Myosurus Myriophyllum Najas Nama Nassella Nasturtium Navarretia Nemophila Neotorularia Nepeta Nicotiana Noccaea Nothocalais Nuphar Nuttallanthus Oenothera Oligoneuron Onobrychis Onoclea Onopordum Onosmodium Oonopsis Ophioglossum Opuntia Oreochrysum Oreostemma Oreoxis Orobanche Orogenia Orthilia Orthocarpus Oryzopsis Osmorhiza Ostrya Oxalis Oxypolis Oxyria Oxytheca Oxytropis Packera Paeonia Palafoxia Panicum Papaver Parietaria Parnassia Paronychia Parrya Parthenium Parthenocissus Pascopyrum Pastinaca Paxistima Pectis Pectocarya Pedicularis Pediocactus Pediomelum Pellaea Pennisetum Penstemon Perideridia Petasites Petradoria Petrophytum Phacelia Phalaris Phaseolus Phemeranthus Philadelphus Phippsia Phleum Phlox Phragmites Phryma Phyla Phyllodoce Physalis Physaria Physocarpus Physostegia Picea Picradeniopsis Picrothamnus Pinus Piperia Piptatherum Plagiobothrys Plantago Platanthera Platyschkuhria Pleuraphis Poa Polanisia Polemonium Polygala Polygonatum Polygonum Polypodium Polypogon Polystichum Populus Porterella Portulaca Potamogeton Potentilla Prenanthes Primula Proboscidea Prosartes Prunella Prunus Psathyrostachys Pseudelymus Pseudocymopterus Pseudognaphalium Pseudoroegneria Pseudostellaria Pseudotsuga Psilocarphus Psoralidium Pteridium Pterospora Pteryxia Puccinellia Pulsatilla Purshia Pyrola Pyrrocoma Quercus Ranunculus Raphanus Ratibida Rayjacksonia Redfieldia Reseda Rhamnus Rheum Rhodiola Rhus Ribes Robinia Rorippa Rosa Rubus Rudbeckia Rumex Ruppia Sagina Sagittaria Salicornia Salix Salsola Salvia Sambucus Sanguisorba Sanicula Saponaria Sarcobatus Saussurea Saxifraga Scabrethia Schedonnardus Schedonorus Scheuchzeria Schizachne Schizachyrium Schoenocrambe Schoenoplectus Scirpus Scolochloa Scorzonera Scrophularia Scutellaria Secale Securigera Sedum Selaginella Senecio Sesuvium Setaria Shepherdia Shinnersoseris Shoshonea Sibbaldia Sidalcea Silene Silphium Sinapis Sisymbrium Sisyrinchium Sium Smelowskia Smilax Solanum Solidago Sonchus Sophora Sorbus Sorghastrum Sorghum Sparganium Spartina Spergula Spergularia Sphaeralcea Sphaeromeria Sphaerophysa Sphenopholis Spiraea Spiranthes Spirodela Sporobolus Stachys Stanleya Stellaria Stenogonum Stenosiphon Stenotus Stephanomeria Streptanthella Streptanthus Streptopus Stuckenia Suaeda Subularia Suckleya Sullivantia Swertia Symphoricarpos Symphyotrichum Symphytum Synthyris Syringa Tagetes Tamarix Tanacetum Taraxacum Telesonix Tephroseris Tetradymia Tetraneuris Teucrium Thalictrum Thelesperma Thelypodiopsis Thelypodium Thermopsis Thinopyrum Thlaspi Thymus Tiquilia Tonestus Torreyochloa Townsendia Toxicodendron Tradescantia Tragopogon Trautvetteria Triantha Tribulus Trichophorum Trifolium Triglochin Trillium Triodanis Tripleurospermum Tripterocalyx Trisetum Triteleia Triticum Trollius Typha Ulmus Urtica Utricularia Vaccaria Vaccinium Vahlodea Valeriana Ventenata Veratrum Verbascum Verbena Verbesina Veronica Viburnum Vicia Viola Vitis Vulpia Woodsia Wyethia Xanthium Xerophyllum Xylorhiza Yermo Yucca Zannichellia Zea Zigadenus Zizia Zuckia