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 Fabaceae Rosaceae Euphorbiaceae Asteraceae Lamiaceae Acanthaceae Aceraceae Berberidaceae Poaceae Caryophyllaceae Ranunculaceae Acoraceae Pteridaceae Rhamnaceae Crassulaceae Hippocastanaceae Liliaceae Agavaceae Simaroubaceae Polemoniaceae Alismataceae Chenopodiaceae Monotropaceae Betulaceae Aloaceae Verbenaceae Amaranthaceae Brassicaceae Lythraceae Apiaceae Boraginaceae Apocynaceae Primulaceae Saururaceae Basellaceae Scrophulariaceae Aponogetonaceae Aizoaceae Araliaceae Asclepiadaceae Ericaceae Viscaceae Papaveraceae Polygonaceae Aristolochiaceae Elaeocarpaceae Plumbaginaceae Araceae Aspleniaceae Campanulaceae Dryopteridaceae Solanaceae Sterculiaceae Azollaceae Bataceae Saxifragaceae Cactaceae Elatinaceae Blechnaceae Urticaceae Orobanchaceae Ophioglossaceae Cucurbitaceae Cabombaceae Buddlejaceae Cyperaceae Burseraceae Portulacaceae Callitrichaceae Cupressaceae Calycanthaceae Orchidaceae Convolvulaceae Onagraceae Bignoniaceae Cannabaceae Hydrangeaceae Ulmaceae Gentianaceae Valerianaceae Rubiaceae Ceratophyllaceae Parkeriaceae Iridaceae Pyrolaceae Fagaceae Lauraceae Vitaceae Cistaceae Capparaceae Rutaceae Santalaceae Commelinaceae Cornaceae Fumariaceae Myrtaceae Crossosomataceae Cuscutaceae Sarraceniaceae Datiscaceae Ebenaceae Dipsacaceae Thymelaeaceae Sapindaceae Hydrophyllaceae Droseraceae Hydrocharitaceae Pontederiaceae Elaeagnaceae Empetraceae Ephedraceae Equisetaceae Eriocaulaceae Geraniaceae Grossulariaceae Loasaceae Celastraceae Zygophyllaceae Moraceae Limnanthaceae Oleaceae Fouquieriaceae Frankeniaceae Garryaceae Molluginaceae Haloragaceae Gunneraceae Cymodoceaceae Linaceae Hippuridaceae Clusiaceae Pedaliaceae Aquifoliaceae Balsaminaceae Isoetaceae Juglandaceae Juncaceae Krameriaceae Lemnaceae Caprifoliaceae Juncaginaceae Hamamelidaceae Anacardiaceae Lycopodiaceae Marsileaceae Meliaceae Melianthaceae Menyanthaceae Myricaceae Myoporaceae Najadaceae Nelumbonaceae Nymphaeaceae Resedaceae Oxalidaceae Paeoniaceae Passifloraceae Arecaceae Lennoaceae Zosteraceae Phytolaccaceae Rafflesiaceae Lentibulariaceae Pittosporaceae Plantaginaceae Platanaceae Polygalaceae Polypodiaceae Salicaceae Potamogetonaceae Dennstaedtiaceae Punicaceae Ruppiaceae Salviniaceae Scheuchzeriaceae Selaginellaceae Simmondsiaceae Smilacaceae Sparganiaceae Staphyleaceae Styracaceae Tamaricaceae Taxaceae Thelypteridaceae Tropaeolaceae Typhaceae Violaceae Zannichelliaceae
Abies Abronia Abutilon Acacia Acaena Acalypha Acamptopappus Acanthomintha Acanthus Acer Achillea Achlys Achnatherum Achyrachaena Achyronychia Acleisanthes Aconitum Acorus Acourtia Acrachne Acroptilon Actaea Adenocaulon Adenophyllum Adenostoma Adiantum Adolphia Adonis Aegilops Aegopogon Aeonium Aeschynomene Aesculus Agapanthus Agastache Agave Ageratina Ageratum Agnorhiza Agoseris Agrimonia Agropogon Agropyron Agrostemma Agrostis Ailanthus Aira Albizia Alcea Alhagi Aliciella Alisma Allenrolfea Allionia Allium Allophyllum Allotropa Almutaster Alnus Aloe Alopecurus Aloysia Alternanthera Alyssum Amaranthus Amaryllis Amberboa Amblyopappus Ambrosia Amelanchier Ammannia Ammi Ammophila Ammoselinum Amorpha Ampelodesmos Amphibromus Amphipappus Amsinckia Amsonia Anagallis Anaphalis Anchusa Ancistrocarphus Andropogon Androsace Androstephium Anelsonia Anemone Anemopsis Anethum Angelica Anisocarpus Anisocoma Anisodontea Anoda Anredera Antennaria Anthemis Antheropeas Anthoxanthum Anthriscus Anthyllis Antirrhinum Anulocaulis Apera Aphanes Aphanisma Apiastrum Apium Apocynum Aponogeton Aptenia Aquilegia Arabidopsis Arabis Aralia Araujia Arbutus Arceuthobium Arctium Arctomecon Arctostaphylos Arctotheca Arctotis Arenaria Argemone Argentina Argyranthemum Argyrochosma Argythamnia Aristida Aristocapsa Aristolochia Aristotelia Armeria Armoracia Arnica Arrhenatherum Artemisia Arthrocnemum Arum Aruncus Arundo Asarum Asclepias Asparagus Asperugo Asphodelus Aspidotis Asplenium Astragalus Astrolepis Asyneuma Athyrium Athysanus Atrichoseris Atriplex Atropa Aubrieta Avena Avicennia Axonopus Ayenia Azolla Baccharis Bacopa Bahia Baileya Balsamorhiza Barbarea Bassia Batis Bauhinia Bebbia Beckmannia Bellardia Bellis Benitoa Bensoniella Berberis Bergerocactus Bergia Bernardia Berula Beta Betula Bidens Bituminaria Blechnum Blennosperma Blepharidachne Blepharipappus Blepharizonia Bloomeria Boehmeria Boerhavia Bolandra Bombycilaena Borago Boschniakia Bothriochloa Botrychium Bouteloua Bowlesia Boykinia Brachychiton Brachypodium Brandegea Brasenia Brassica Brickellia Briza Brodiaea Bromus Bryonia Buddleja Buglossoides Bulbostylis Bupleurum Bursera Cabomba Cacaliopsis Caesalpinia Cakile Calamagrostis Calamintha Calandrinia Calendula Calibrachoa Calliandra Callitriche Calocedrus Calochortus Calotropis Caltha Calycadenia Calycanthus Calycoseris Calypso Calystegia Camassia Camelina Camissonia Campanula Campsis Canbya Cannabis Capsella Capsicum Caragana Cardamine Cardaria Cardionema Carduus Carex Carlowrightia Carlquistia Carnegiea Carpenteria Carpobrotus Carthamus Cassiope Castela Castilleja Catalpa Catapodium Catharanthus Caulanthus Caulostramina Ceanothus Cedronella Celtis Cenchrus Centaurea Centaurium Centranthus Centromadia Centrostegia Cephalanthera Cephalanthus Cerastium Ceratocephala Ceratonia Ceratophyllum Ceratopteris Cercis Cercocarpus Cestrum Chaenactis Chaetadelpha Chaetopappa Chamaebatia Chamaebatiaria Chamaecyparis Chamaecytisus Chamaemelum Chamaesaracha Chamaesyce Chamerion Chasmanthe Cheilanthes Chenopodium Chilopsis Chimaphila Chloracantha Chloris Chlorogalum Chlorophytum Chondrilla Chorisiva Chorispora Chorizanthe Chrysanthemum Chrysolepis Chrysosplenium Chrysothamnus Cicendia Cichorium Cicuta Cinna Cinnamomum Circaea Cirsium Cissus Cistanthe Cistus Citrullus Cladium Clarkia Claytonia Clematis Cleome Cleomella Clinopodium Clintonia Clitoria Cneoridium Cnicus Cochlearia Coincya Coleogyne Collinsia Collomia Colubrina Colutea Comandra Comarostaphylis Comarum Commelina Condalia Conicosia Conioselinum Conium Conringia Consolida Constancea Convolvulus Conyza Coprosma Coptis Corallorhiza Cordylanthus Cordyline Coreopsis Corethrogyne Coriandrum Corispermum Cornus Coronilla Coronopus Cortaderia Corydalis Corylus Corymbia Cosmos Cotoneaster Cotula Cotyledon Crambe Crassula Crataegus Crepis Cressa Crocidium Crocosmia Crossosoma Croton Crucianella Crupina Crypsis Cryptantha Cryptogramma Cucumis Cucurbita Cupressus Cuscuta Cusickiella Cutandia Cyanopsis Cycladenia Cycloloma Cyclospermum Cydonia Cylindropuntia Cymbalaria Cymopterus Cynanchum Cynara Cynodon Cynoglossum Cynosurus Cyperus Cypripedium Cypselea Cyrtomium Cystopteris Cytisus Dactylis Dactyloctenium Dalea Damasonium Danthonia Darlingtonia Darmera Dasiphora Dasyochloa Datisca Datura Daucus Dedeckera Deinandra Delairea Delosperma Delphinium Dendromecon Deschampsia Descurainia Dianthus Dicentra Dichanthelium Dichelostemma Dichondra Dicoria Digitalis Digitaria Dimeresia Dimorphotheca Diodia Diospyros Diplacus Diplotaxis Dipogon Dipsacus Dirca Dissanthelium Distichlis Dithyrea Dittrichia Dodecahema Dodecatheon Dodonaea Dopatrium Downingia Draba Dracunculus Draperia Drosanthemum Drosera Dryopteris Duchesnea Dudleya Dulichium Duranta Dyssodia Eastwoodia Eatonella Echinocactus Echinocereus Echinochloa Echinodorus Echinomastus Echinops Echium Eclipta Egeria Ehrendorferia Ehrharta Eichhornia Elaeagnus Elatine Eleocharis Eleusine Elodea Elyhordeum Elyleymus Elymus Emex Emilia Emmenanthe Empetrum Encelia Enceliopsis Enchylaena Endolepis Enemion Enneapogon Ephedra Epilobium Epipactis Equisetum Eragrostis Erechtites Eremalche Eremochloa Eriastrum Erica Ericameria Erigeron Eriobotrya Eriocaulon Eriochloa Eriodictyon Eriogonum Erioneuron Eriophorum Eriophyllum Erodium Eruca Erucastrum Eryngium Erysimum Erythronium Escallonia Eschscholzia Escobaria Eucalyptus Eucephalus Euchiton Euclidium Eucnide Eucrypta Eugenia Euonymus Euphorbia Eurybia Eustachys Eustoma Euthamia Evax Fagonia Fagopyrum Fallugia Fatoua Fendlerella Ferocactus Festuca Ficus Filago Filipendula Fimbristylis Firmiana Flaveria Floerkea Foeniculum Forestiera Fortunella Fouquieria Fragaria Frangula Frankenia Frasera Fraxinus Freesia Fremontodendron Fritillaria Froelichia Fuchsia Fumaria Funastrum Gaillardia Galenia Galeopsis Galinsoga Galium Gambelia Gamochaeta Garrya Gastridium Gaudinia Gaultheria Gaura Gayophytum Gazania Genista Gentiana Gentianella Gentianopsis Geraea Geranium Geum Gilia Gilmania Githopsis Gladiolus Glandularia Glaucium Glaux Glebionis Glechoma Gleditsia Glehnia Glinus Glossopetalon Glyceria Glycyrrhiza Glyptopleura Gnaphalium Gonocarpus Goodmania Goodyera Gossypium Gratiola Grayia Grindelia Grusonia Guilleminea Guillenia Guizotia Gunnera Gutierrezia Gymnosteris Gypsophila Hackelia Hainardia Halimium Halimodendron Halimolobos Halodule Halogeton Haloragis Harmonia Harpagonella Hastingsia Hazardia Hebe Hecastocleis Hedeoma Hedera Hedypnois Helenium Helianthella Helianthemum Helianthus Helichrysum Heliomeris Heliotropium Hemitomes Hemizonella Hemizonia Heracleum Herissantia Herniaria Hesperevax Hesperis Hesperocallis Hesperochiron Hesperocnide Hesperolinon Hesperostipa Hesperoyucca Heteranthemis Heteranthera Heterocodon Heterodraba Heteromeles Heteropogon Heterotheca Heuchera Hibiscus Hieracium Hierochloe Hippuris Hirschfeldia Hoffmannseggia Hoheria Hoita Holcus Hollisteria Holmgrenanthe Holocarpha Holodiscus Holosteum Holozonia Hordeum Horkelia Horkeliella Hornungia Horsfordia Howellia Howelliella Hulsea Humulus Hunnemannia Hyacinthus Hydrilla Hydrocotyle Hydrophyllum Hymenoclea Hymenopappus Hymenothrix Hymenoxys Hyparrhenia Hypericum Hypochaeris Hyptis Iberis Ibicella Idahoa Ilex Iliamna Impatiens Imperata Inula Ionactis Ionopsidium Ipomoea Ipomopsis Iris Isatis Isocoma Isoetes Isolepis Iva Ivesia Ixia Jamesia Jarava Jaumea Jensia Jepsonia Johanneshowellia Juglans Juncus Juniperus Justicia Kallstroemia Kalmia Karroochloa Keckiella Kelloggia Kickxia Kniphofia Kobresia Koeberlinia Koeleria Krameria Krascheninnikovia Kumlienia Kyhosia Kyllinga Laburnum Lactuca Laennecia Lagophylla Lagurus Lamarckia Lamiastrum Lamium Lampranthus Landoltia Langloisia Lantana Laportea Lappula Lapsana Larrea Lasiospermum Lastarriaea Lasthenia Lathrocasis Lathyrus Laurus Lavandula Lavatera Layia Ledum Leersia Legenere Legousia Lemna Lens Leonotis Leontodon Lepechinia Lepidium Lepidospartum Leptochloa Leptodactylon Leptosiphon Leptospermum Lesquerella Lessingia Leucaena Leucanthemum Leucocrinum Leucojum Leucophysalis Leucopoa Leucothoe Lewisia Leycesteria Leymus Libertia Ligusticum Ligustrum Lilaea Lilaeopsis Lilium Limnanthes Limnobium Limnophila Limonium Limosella Linanthus Linaria Lindernia Linnaea Linum Lipocarpha Liquidambar Listera Lithocarpus Lithophragma Lithospermum Lithrea Lobelia Lobularia Loeflingia Loeseliastrum Logfia Lolium Lomatium Lonicera Lotus Ludwigia Luetkea Luina Lunaria Lupinus Luzula Lychnis Lycianthes Lycium Lycopodiella Lycopodium Lycopus Lycurus Lyonothamnus Lyrocarpa Lysichiton Lysimachia Lythrum Machaeranthera Maclura Madia Mahonia Maianthemum Malacothamnus Malacothrix Malaxis Malcolmia Malephora Malosma Malperia Malus Malva Malvella Mammillaria Mantisalca Marah Marina Marrubium Marsilea Matelea Matricaria Matthiola Maurandella Maytenus Mazus Meconella Medicago Melampodium Melia Melianthus Melica Melilotus Melinis Melissa Menodora Mentha Mentzelia Menyanthes Menziesia Mercurialis Mertensia Mesembryanthemum Micropus Microseris Microsteris Mimetanthe Mimulus Minuartia Mirabilis Miscanthus Misopates Mitella Modiola Moehringia Moenchia Mohavea Mollugo Moluccella Monanthochloe Monarda Monardella Moneses Monochoria Monolepis Monolopia Monoptilon Monotropa Monroa Montia Moraea Morella Mortonia Morus Mucronea Muehlenbeckia Muhlenbergia Muilla Muntingia Muscari Myoporum Myosotis Myosurus Myrica Myriophyllum Najas Nama Narcissus Narthecium Nassella Nasturtium Navarretia Nelumbo Nemacaulis Nemacladus Nemophila Neogaerrhinum Neostapfia Nepeta Nerium Nestotus Neviusia Nicandra Nicolletia Nicotiana Nigella Nitrophila Noccaea Nolina Nothocalais Nothochelone Notholaena Nothoscordum Nuphar Nuttallanthus Nymphaea Nymphoides Odontostomum Oemleria Oenanthe Oenothera Olea Oligomeris Olneya Olsynium Oncosiphon Onobrychis Ononis Onopordum Ophioglossum Opuntia Orcuttia Oreonana Oreostemma Origanum Ornithogalum Ornithopus Ornithostaphylos Orobanche Orochaenactis Orogenia Orthilia Orthocarpus Oryctes Oryza Osmadenia Osmorhiza Osteospermum Otholobium Ottelia Oxalis Oxypolis Oxyria Oxystylis Oxytenia Oxytheca Oxytropis Packera Paeonia Palafoxia Pancratium Panicum Papaver Parapholis Paraserianthes Parentucellia Parietaria Parishella Parkinsonia Parnassia Paronychia Parthenocissus Pascopyrum Paspalum Passiflora Pastinaca Paxistima Pectis Pectocarya Pedicularis Pediomelum Peganum Pelargonium Pellaea Peltandra Pennisetum Penstemon Pentachaeta Pentaglottis Pentagramma Peraphyllum Pericallis Pericome Perideridia Perityle Petalonyx Petasites Peteria Petradoria Petrophytum Petrorhagia Petroselinum Petunia Peucephyllum Phacelia Phalacroseris Phalaris Phaseolus Philadelphus Phleum Phlomis Phlox Phoenicaulis Phoenix Pholisma Pholistoma Phoradendron Photinia Phragmites Phryma Phyla Phyllodoce Phyllospadix Phyllostachys Physalis Physaria Physocarpus Phytolacca Picea Pickeringia Picris Picrothamnus Pilostyles Pilularia Pinellia Pinguicula Pinus Piperia Piptatherum Piptochaetium Pistacia Pistia Pisum Pittosporum Pityopus Plagiobothrys Plantago Platanthera Platanus Platystemon Platystigma Plectritis Pleiacanthus Pleuraphis Pleuricospora Pleurocoronis Pleuropogon Pluchea Plumbago Poa Podistera Pogogyne Polanisia Polemonium Poliomintha Polycarpon Polyctenium Polygala Polygonum Polypodium Polypogon Polystichum Populus Porophyllum Porterella Portulaca Potamogeton Potentilla Prenanthella Primula Proboscidea Prosartes Prosopis Prunella Prunus Psathyrotes Pseudelymus Pseudobahia Pseudocydonia Pseudognaphalium Pseudoroegneria Pseudorontium Pseudosasa Pseudostellaria Pseudotsuga Psilocarphus Psilostrophe Psoralidium Psorothamnus Ptelea Pteridium Pteris Pterospora Pterostegia Pteryxia Ptilagrostis Puccinellia Pulicaria Pulsatilla Punica Purshia Pycnanthemum Pyracantha Pyrola Pyrrocoma Pyrus Quercus Quincula Rafinesquia Raillardella Ranunculus Raphanus Rapistrum Ratibida Reseda Retama Rhagadiolus Rhamnus Rhodanthe Rhodiola Rhododendron Rhus Rhynchospora Ribes Ricinus Rigiopappus Robinia Romanzoffia Romneya Romulea Rorippa Rosa Rosmarinus Rostraria Rotala Rubia Rubus Rudbeckia Rumex Rupertia Ruppia Ruta Rytidosperma Saccharum Sagina Sagittaria Sairocarpus Salazaria Salicornia Salix Salpichroa Salsola Saltugilia Salvia Salvinia Sambucus Samolus Sanguisorba Sanicula Santolina Sanvitalia Saponaria Sarcobatus Sarcocornia Sarcodes Sarracenia Saussurea Saxifraga Saxifragopsis Scabiosa Scandix Schedonnardus Schedonorus Scheuchzeria Schinus Schismus Schizachyrium Schkuhria Schoenoplectus Schoenus Scirpus Scleranthus Sclerocactus Sclerochloa Sclerolinon Scleropogon Scoliopus Scolymus Scopulophila Scorzonera Scribneria Scrophularia Scutellaria Secale Securigera Sedella Sedum Selaginella Selinocarpus Senecio Senna Sequoia Sequoiadendron Sericocarpus Sesamum Sesbania Sesuvium Setaria Shepherdia Sherardia Sibara Sibaropsis Sibbaldia Sida Sidalcea Silene Silybum Simmondsia Sinapis Sisymbrium Sisyrinchium Sium Smelowskia Smilax Solanum Soleirolia Solidago Soliva Sollya Sonchus Sorbus Sorghum Sparaxis Sparganium Spartina Spartium Spergula Spergularia Spermolepis Sphaeralcea Sphaeromeria Sphaerophysa Sphenopholis Sphenosciadium Spinacia Spiraea Spiranthes Spirodela Sporobolus Stachys Stanfordia Stanleya Staphylea Stellaria Stemodia Stenanthium Stenotaphrum Stenotus Stephanomeria Stillingia Streptanthella Streptanthus Streptopus Stuckenia Stylocline Stylomecon Styrax Suaeda Subularia Suksdorfia Swallenia Swertia Symphoricarpos Symphyotrichum Symphytum Synthyris Syntrichopappus Systenotheca Taeniatherum Tagetes Tamarix Tanacetum Taraxacum Tauschia Taxus Teesdalia Tellima Tetracoccus Tetradymia Tetragonia Tetraneuris Teucrium Thalictrum Thamnosma Thelesperma Thelypodium Thelypteris Themeda Thermopsis Thinopyrum Thlaspi Thuja Thymophylla Thysanocarpus Thysanolaena Tiarella Tidestromia Tiquilia Tolmiea Tolpis Tonella Tonestus Torilis Torreya Torreyochloa Townsendia Toxicodendron Tracyina Tradescantia Tragia Tragopogon Trautvetteria Triadica Triantha Trianthema Tribolium Tribulus Tricardia Trichocoronis Trichophorum Trichoptilium Trichostema Tridens Trientalis Trifolium Triglochin Trigonella Trillium Triodanis Triphysaria Tripleurospermum Tripterocalyx Trisetum Tristagma Triteleia Triticum Trixis Tropaeolum Tropidocarpum Tsuga Tuctoria Tulipa Turricula Twisselmannia Typha Ulex Ulmus Umbellularia Urochloa Urospermum Urtica Utricularia Vaccaria Vaccinium Vahlodea Valeriana Valerianella Vallesia Vallisneria Vancouveria Velezia Venegasia Venidium Ventenata Veratrum Verbascum Verbena Verbesina Vernicia Veronica Vesicarpa Viburnum Vicia Viguiera Vinca Viola Viscum Vitex Vitis Vulpia Washingtonia Watsonia Whipplea Wigandia Wislizenia Wolffia Wolffiella Woodsia Woodwardia Wyethia Xanthium Xerophyllum Xolantha Xylococcus Xylorhiza Yabea Yucca Zannichellia Zantedeschia Zea Zigadenus Zizania Ziziphus Zostera Zoysia Zygophyllum