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 Ranunculaceae Acoraceae Pteridaceae Fumariaceae Poaceae Apiaceae Hippocastanaceae Scrophulariaceae Lamiaceae Rosaceae Caryophyllaceae Simaroubaceae Fabaceae Liliaceae Alismataceae Brassicaceae Betulaceae Amaranthaceae Lythraceae Vitaceae Apocynaceae Primulaceae Boraginaceae Orchidaceae Araliaceae Papaveraceae Araceae Aristolochiaceae Asclepiadaceae Annonaceae Aspleniaceae Saxifragaceae Dryopteridaceae Azollaceae Gentianaceae Chenopodiaceae Iridaceae Berberidaceae Rhamnaceae Bignoniaceae Urticaceae Nyctaginaceae Ophioglossaceae Cabombaceae Moraceae Polygonaceae Santalaceae Buddlejaceae Cyperaceae Buxaceae Verbenaceae Callitrichaceae Calycanthaceae Menispermaceae Convolvulaceae Campanulaceae Cannabaceae Sapindaceae Juglandaceae Fagaceae Cucurbitaceae Celastraceae Ulmaceae Rubiaceae Ceratophyllaceae Onagraceae Pyrolaceae Oleaceae Portulacaceae Capparaceae Clethraceae Commelinaceae Myricaceae Orobanchaceae Cornaceae Anacardiaceae Cuscutaceae Solanaceae Hydrangeaceae Dennstaedtiaceae Crassulaceae Acanthaceae Caprifoliaceae Dioscoreaceae Ebenaceae Dipsacaceae Thymelaeaceae Droseraceae Hydrocharitaceae Pontederiaceae Elaeagnaceae Elatinaceae Ericaceae Equisetaceae Eriocaulaceae Geraniaceae Sterculiaceae Limnanthaceae Hamamelidaceae Diapensiaceae Loganiaceae Styracaceae Cistaceae Lycopodiaceae Violaceae Hydrophyllaceae Clusiaceae Aquifoliaceae Balsaminaceae Polemoniaceae Isoetaceae Grossulariaceae Juncaceae Cupressaceae Haemodoraceae Lemnaceae Lauraceae Linaceae Magnoliaceae Lygodiaceae Agavaceae Meliaceae Molluginaceae Monotropaceae Haloragaceae Najadaceae Nelumbonaceae Nymphaeaceae Menyanthaceae Cactaceae Osmundaceae Oxalidaceae Passifloraceae Thelypteridaceae Viscaceae Phytolaccaceae Marsileaceae Plantaginaceae Platanaceae Polypodiaceae Podostemaceae Polygalaceae Rutaceae Salicaceae Potamogetonaceae Pedaliaceae Melastomataceae Sarraceniaceae Saururaceae Schisandraceae Selaginellaceae Sapotaceae Smilacaceae Sparganiaceae Staphyleaceae Theaceae Symplocaceae Tamaricaceae Taxaceae Tiliaceae Aizoaceae Zygophyllaceae Hymenophyllaceae Typhaceae Lentibulariaceae Valerianaceae Vittariaceae Blechnaceae Xyridaceae Zannichelliaceae
Abies Abutilon Acalypha Acanthospermum Acer Achillea Acmella Aconitum Acorus Actaea Adiantum Adlumia Adonis Aegilops Aegopodium Aesculus Agalinis Agastache Ageratina Agrimonia Agrostemma Agrostis Ailanthus Aira Ajuga Albizia Alcea Aletris Alisma Alliaria Allium Alnus Alopecurus Alternanthera Alyssum Amaranthus Ambrosia Amelanchier Amianthium Ammannia Ammoselinum Amorpha Ampelopsis Amphiachyris Amphicarpaea Amsonia Anagallis Anaphalis Anchusa Andropogon Anemone Angelica Anoda Antennaria Anthemis Anthoxanthum Anthriscus Aphanes Apios Apium Aplectrum Apocynum Aquilegia Arabidopsis Arabis Arachis Aralia Arctium Arenaria Argemone Argentina Arisaema Aristida Aristolochia Armoracia Arnoglossum Arrhenatherum Artemisia Arthraxon Aruncus Arundinaria Arundo Asarum Asclepias Asimina Asparagus Asplenium Aster Astilbe Astragalus Astranthium Athyrium Aureolaria Avena Azolla Bacopa Baptisia Barbarea Bartonia Bassia Belamcanda Bellis Berberis Berchemia Berteroa Betula Bidens Bignonia Blephilia Boehmeria Boerhavia Boltonia Borago Bothriochloa Botrychium Bouteloua Boykinia Brachyelytrum Brasenia Brassica Brickellia Briza Bromus Broussonetia Brunnichia Buchnera Buckleya Buddleja Buglossoides Bulbostylis Bupleurum Buxus Cabomba Calamagrostis Calamintha Calamovilfa Callicarpa Callirhoe Callitriche Calopogon Caltha Calycanthus Calycocarpum Calystegia Camassia Camelina Campanula Campanulastrum Campsis Cannabis Capsella Cardamine Cardiospermum Carduus Carex Carpinus Carum Carya Castanea Castilleja Catalpa Caulophyllum Cayaponia Ceanothus Celastrus Celosia Celtis Cenchrus Centaurea Centrosema Cephalanthus Cerastium Ceratophyllum Cercis Chaenomeles Chaenorhinum Chaerophyllum Chamaecrista Chamaelirium Chamaesyce Chamerion Chasmanthium Cheilanthes Chelidonium Chelone Chenopodium Chimaphila Chionanthus Chloris Chorispora Chrysogonum Chrysopsis Chrysosplenium Cichorium Cicuta Cinna Circaea Cirsium Citrullus Cladium Cladrastis Claytonia Cleistes Clematis Cleome Clethra Clinopodium Clintonia Clitoria Cnicus Cocculus Coix Collinsia Collinsonia Comandra Commelina Comptonia Conium Conoclinium Conopholis Conradina Conringia Consolida Convallaria Convolvulus Conyza Corallorhiza Coreopsis Coriandrum Cornus Coronopus Cortaderia Corydalis Corylus Cosmos Cotinus Crataegus Crepis Crotalaria Croton Cruciata Cryptotaenia Cucurbita Cunila Cuphea Cuscuta Cycloloma Cyclospermum Cymbalaria Cymophyllus Cynanchum Cynodon Cynoglossum Cynosciadium Cynosurus Cyperus Cypripedium Cystopteris Cytisus Dactylis Dactyloctenium Dactylorhiza Dalea Danthonia Dasistoma Datura Daucus Decodon Decumaria Delphinium Dennstaedtia Deparia Deschampsia Descurainia Desmanthus Desmodium Diamorpha Dianthus Diarrhena Dicentra Dichanthelium Dichondra Dicliptera Didiplis Diervilla Digitaria Dioclea Diodia Dioscorea Diospyros Diphylleia Diplazium Dipsacus Dirca Dodecatheon Doellingeria Draba Dracunculus Drosera Dryopteris Duchesnea Dulichium Dyssodia Echinacea Echinochloa Echinodorus Echium Eclipta Egeria Eichhornia Elaeagnus Elatine Eleocharis Elephantopus Eleusine Elodea Elymus Enemion Epifagus Epigaea Epilobium Epipactis Equisetum Eragrostis Erechtites Eremochloa Erigenia Erigeron Eriocaulon Eriochloa Eriogonum Eriophorum Erodium Eryngium Erysimum Erythronium Eschscholzia Eubotrys Euonymus Eupatoriadelphus Eupatorium Euphorbia Eurybia Euthamia Evolvulus Fagopyrum Fagus Fatoua Festuca Ficus Fimbristylis Firmiana Fleischmannia Floerkea Foeniculum Forestiera Forsythia Fothergilla Fragaria Frangula Frasera Fraxinus Froelichia Fuirena Gaillardia Galactia Galax Galearis Galeopsis Galinsoga Galium Gamochaeta Gaultheria Gaura Gaylussacia Gelsemium Gentiana Gentianella Gentianopsis Geranium Geum Gillenia Gladiolus Glandularia Glechoma Gleditsia Glyceria Glycine Goodyera Gratiola Grindelia Guizotia Gymnocladus Gymnopogon Gypsophila Hackelia Halesia Hamamelis Hasteola Hedeoma Hedera Helenium Helianthemum Helianthus Heliopsis Heliotropium Helleborus Hemerocallis Hepatica Heracleum Hesperis Heteranthera Heterotheca Heuchera Hexalectris Hexastylis Hibiscus Hieracium Holcus Holosteum Hordeum Hottonia Houstonia Humulus Huperzia Hybanthus Hydrangea Hydrastis Hydrilla Hydrocotyle Hydrolea Hydrophyllum Hylotelephium Hymenocallis Hypericum Hypochaeris Hypoxis Iberis Ilex Impatiens Indigofera Inula Iodanthus Ionactis Ipomoea Ipomopsis Iresine Iris Isoetes Isolepis Isotria Itea Iva Jacquemontia Jeffersonia Juglans Juncus Juniperus Justicia Kalmia Kerria Kickxia Koelreuteria Krigia Kummerowia Kyllinga Lachnanthes Lachnocaulon Lactuca Lagerstroemia Lamium Landoltia Laportea Lappula Lapsana Lathyrus Leavenworthia Lechea Leersia Leiophyllum Lemna Leonotis Leontodon Leonurus Lepidium Leptochloa Lespedeza Lesquerella Leucanthemum Leucojum Leucospora Leucothoe Liatris Ligusticum Ligustrum Lilium Limnobium Linaria Lindera Lindernia Linnaea Linum Liparis Lipocarpha Liquidambar Liriodendron Listera Lithospermum Lobelia Lolium Lonicera Lotus Ludwigia Lunaria Luzula Lychnis Lycium Lycopodiella Lycopodium Lycopus Lycoris Lygodium Lyonia Lysimachia Lythrum Macleaya Maclura Magnolia Maianthemum Malaxis Malus Malva Malvastrum Manfreda Marrubium Marshallia Matelea Matricaria Mazus Mecardonia Medeola Medicago Meehania Melampyrum Melanthera Melia Melica Melilotus Melissa Melothria Menispermum Mentha Menziesia Mertensia Micranthemum Microstegium Microthlaspi Mikania Milium Mimosa Mimulus Minuartia Mirabilis Miscanthus Mitchella Mitella Mitreola Modiola Mollugo Monarda Monotropa Monotropsis Montia Morus Mosla Muhlenbergia Murdannia Muscari Myosotis Myosoton Myosurus Myrica Myriophyllum Najas Narcissus Nasturtium Navarretia Neeragrostis Nelumbo Nemastylis Nemophila Neobeckia Nepeta Nestronia Neviusia Nicandra Nigella Nolina Nothoscordum Nuphar Nuttallanthus Nymphaea Nymphoides Nyssa Obolaria Oclemena Oenothera Oldenlandia Oligoneuron Onoclea Onosmodium Ophioglossum Opuntia Orbexilum Ornithogalum Orobanche Orontium Oryza Osmorhiza Osmunda Ostrya Oxalis Oxydendrum Oxypolis Pachysandra Packera Panax Panicum Papaver Parietaria Parnassia Paronychia Parthenium Parthenocissus Pascopyrum Paspalum Passiflora Pastinaca Paulownia Paxistima Pedicularis Pediomelum Pellaea Peltandra Pennisetum Penstemon Penthorum Perideridia Perilla Periploca Petrorhagia Petunia Peucedanum Phacelia Phalaris Phanopyrum Phaseolus Phegopteris Phemeranthus Philadelphus Phleum Phlox Phoradendron Photinia Phragmites Phryma Phyla Phyllanthus Phyllostachys Physalis Physocarpus Physostegia Phytolacca Picea Picris Pieris Pilea Pilularia Pimpinella Pinus Piptatherum Piptochaetium Pityopsis Planera Plantago Platanthera Platanus Pleioblastus Pleopeltis Pluchea Poa Podophyllum Podostemum Pogonia Polanisia Polemonium Polygala Polygonatum Polygonella Polygonum Polymnia Polypodium Polypogon Polypremum Polystichum Polytaenia Poncirus Pontederia Ponthieva Populus Portulaca Potamogeton Potentilla Prenanthes Proboscidea Prosartes Proserpinaca Prunella Prunus Pseudognaphalium Pseudosasa Ptelea Pteridium Ptilimnium Pueraria Pycnanthemum Pyracantha Pyrola Pyrrhopappus Pyrularia Pyrus Quercus Ranunculus Raphanus Rapistrum Ratibida Rhamnus Rhexia Rhododendron Rhus Rhynchosia Rhynchospora Ribes Richardia Ricinus Robinia Rorippa Rosa Rotala Rubus Rudbeckia Ruellia Rugelia Rumex Sabatia Saccharum Sacciolepis Sagina Sagittaria Salix Salsola Salvia Sambucus Samolus Sanguinaria Sanguisorba Sanicula Saponaria Sarracenia Sasa Sassafras Saururus Saxifraga Schedonorus Schisandra Schizachyrium Schoenolirion Schoenoplectus Schwalbea Scirpus Scleranthus Scleria Sclerochloa Scrophularia Scutellaria Secale Securigera Sedum Selaginella Senecio Senna Sericocarpus Sesbania Setaria Seymeria Sherardia Shortia Sibara Sibbaldiopsis Sicyos Sida Sideroxylon Silene Silphium Silybum Sinapis Sisymbrium Sisyrinchium Sium Smallanthus Smilax Solanum Solidago Soliva Sonchus Sorbaria Sorbus Sorghastrum Sorghum Sparganium Spartina Spermacoce Spermolepis Sphenopholis Spigelia Spiraea Spiranthes Spirodela Sporobolus Stachys Staphylea Steinchisma Stellaria Stenanthium Stenaria Stenotaphrum Stewartia Stillingia Streptopus Strophostyles Stuckenia Stylisma Stylophorum Stylosanthes Styrax Sullivantia Symphoricarpos Symphyotrichum Symphytum Symplocarpus Symplocos Synandra Syringa Taenidia Tamarix Tanacetum Taraxacum Taxodium Taxus Tephrosia Tetragonotheca Teucrium Thalictrum Thaspium Thelypteris Thermopsis Thlaspi Thuja Thymus Tiarella Tilia Tipularia Torilis Torreyochloa Toxicodendron Trachelospermum Tradescantia Tragia Tragopogon Trautvetteria Trepocarpus Triadenum Triantha Trianthema Tribulus Trichomanes Trichophorum Trichostema Tridens Trientalis Trifolium Trillium Triodanis Triosteum Triphora Triplasis Tripsacum Trisetum Triticum Tsuga Tussilago Typha Ulmus Urochloa Urtica Utricularia Uvularia Vaccaria Vaccinium Valeriana Valerianella Vallisneria Veratrum Verbascum Verbena Verbesina Vernonia Veronica Veronicastrum Viburnum Vicia Vinca Viola Vitex Vitis Vittaria Vulpia Waldsteinia Weigela Wisteria Wolffia Wolffiella Woodsia Woodwardia Xanthium Xanthorhiza Xerophyllum Xyris Youngia Yucca Zannichellia Zanthoxylum Zea Zigadenus Zizania Zizaniopsis Zizia Zoysia