Families, genera and species in North America Source: USDA, NRCS. 2009. The PLANTS Database (http://plants.usda.gov, 24 June 2009). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

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

Select a Family	Select a Genus	Species
Caprifoliaceae Malvaceae Pinaceae Thuidiaceae Cyperaceae Nyctaginaceae Uncertain Lichen Family Fabaceae Stictidaceae Rosaceae Euphorbiaceae Asteraceae Cactaceae Lamiaceae Acanthaceae Acarosporaceae Pottiaceae Aceraceae Berberidaceae Poaceae Amaranthaceae Caryophyllaceae Calyceraceae Apiaceae Melastomataceae Solanaceae Arecaceae Ranunculaceae Acoraceae Acrobolbaceae Monoblastiaceae Lejeuneaceae Rutaceae Sematophyllaceae Caliciaceae Pteridaceae Actinidiaceae Schizaeaceae Bombacaceae Verrucariaceae Bacidiaceae Apocynaceae Grammitidaceae Fumariaceae Rhamnaceae Adoxaceae Bromeliaceae Orobanchaceae Verbenaceae Crassulaceae Sapotaceae Hippocastanaceae Zingiberaceae Podocarpaceae Scrophulariaceae Liliaceae Ericaceae Araucariaceae Agavaceae Phytolaccaceae Meliaceae Araceae Hymeneliaceae Agyriaceae Parmeliaceae Rubiaceae Simaroubaceae Lardizabalaceae Alectoriaceae Sapindaceae Polemoniaceae Alismataceae Boraginaceae Chenopodiaceae Brassicaceae Casuarinaceae Monotropaceae Betulaceae Aloaceae Iridaceae Leucodontaceae Cyatheaceae Physciaceae Meesiaceae Amblystegiaceae Orchidaceae Lythraceae Bixaceae Vitaceae Orthotrichaceae Bignoniaceae Porpidiaceae Fabroniaceae Anacardiaceae Bartramiaceae Primulaceae Jungermanniaceae Andreaeaceae Andreaeobryaceae Commelinaceae Lichinaceae Anemiaceae Saururaceae Vittariaceae Aneuraceae Marattiaceae Lauraceae Convolvulaceae Annonaceae Combretaceae Bryaceae Anomodontaceae Basellaceae Polygonaceae Antheliaceae Anthocerotaceae Pyrenulaceae Eremolepidaceae Trapeliaceae Dicranaceae Crossosomataceae Funariaceae Splachnaceae Cucurbitaceae Metzgeriaceae Aponogetonaceae Treubiaceae Aizoaceae Burmanniaceae Dryopteridaceae Araliaceae Asclepiadaceae Viscaceae Archidiaceae Papaveraceae Arctomiaceae Lecanoraceae Myrsinaceae Aristolochiaceae Elaeocarpaceae Plumbaginaceae Arnelliaceae Arthoniaceae Arthopyreniaceae Arthrorhaphidaceae Catillariaceae Moraceae Chloranthaceae Porellaceae Malpighiaceae Aspleniaceae Aytoniaceae Mycocaliciaceae Thelotremataceae Saxifragaceae Trypetheliaceae Campanulaceae Capparaceae Cleveaceae Atheliaceae Polytrichaceae Cornaceae Aulacomniaceae Gomphillaceae Cupressaceae Oxalidaceae Sterculiaceae Azollaceae Opegraphaceae Myrtaceae Baeomycetaceae Zygophyllaceae Balanophoraceae Flacourtiaceae Proteaceae Meteoriaceae Lecythidaceae Gentianaceae Bataceae Lepidoziaceae Begoniaceae Gyalectaceae Elatinaceae Brachytheciaceae Biatorellaceae Blasiaceae Blechnaceae Pseudolepicoleaceae Seligeriaceae Hydrocharitaceae Urticaceae Myoporaceae Burseraceae Ophioglossaceae Fontinalaceae Cabombaceae Hedwigiaceae Brigantiaceae Hydrangeaceae Bruchiaceae Rhizophoraceae Brunelliaceae Encalyptaceae Hypnaceae Leskeaceae Bryoxiphiaceae Marchantiaceae Santalaceae Buddlejaceae Sphaerophoraceae Butomaceae Buxbaumiaceae Buxaceae Pilocarpaceae Portulacaceae Marantaceae Callicostaceae Callitrichaceae Ectolechiaceae Clusiaceae Teloschistaceae Calycanthaceae Menispermaceae Allisoniaceae Onagraceae Calymperaceae Calypogeiaceae Theaceae Polypodiaceae Ptychomitriaceae Candelariaceae Canellaceae Cannaceae Cannabaceae Celastraceae Caricaceae Cyclanthaceae Juglandaceae Caryocaraceae Fagaceae Rhizocarpaceae Catoscopiaceae Caulerpaceae Lecideaceae Cecropiaceae Ulmaceae Valerianaceae Dipsacaceae Cephalotaxaceae Cephaloziaceae Cephaloziellaceae Empetraceae Ditrichaceae Ceratophyllaceae Parkeriaceae Pedaliaceae Cercidiphyllaceae Loasaceae Coniocybaceae Geocalycaceae Pyrolaceae Oleaceae Chionosphaeraceae Chonecoleaceae Thelenellaceae Chrysobalanaceae Gesneriaceae Chrysotrichaceae Dicksoniaceae Mniaceae Cistaceae Cladoniaceae Tiliaceae Trichotheliaceae Clethraceae Cyrillaceae Climaciaceae Dacampiaceae Coccocarpiaceae Coccotremataceae Collemataceae Myricaceae Connaraceae Conocephalaceae Corsiniaceae Hamamelidaceae Corynocarpaceae Grimmiaceae Costaceae Crocyniaceae Stemonaceae Cryphaeaceae Cuscutaceae Cycadaceae Cymodoceaceae Platygloeaceae Dactylosporaceae Daltoniaceae Thymelaeaceae Sarraceniaceae Datiscaceae Davalliaceae Pannariaceae Lobariaceae Roccellaceae Loranthaceae Dennstaedtiaceae Loganiaceae Diapensiaceae Gleicheniaceae Corticiaceae Dilleniaceae Droseraceae Dioscoreaceae Ebenaceae Scapaniaceae Disceliaceae Hydrophyllaceae Winteraceae Dipterocarpaceae Capnodiaceae Pontederiaceae Eigleraceae Elaeagnaceae Zamiaceae Musaceae Entodontaceae Stereophyllaceae Pleomassariaceae Ephedraceae Ephemeraceae Equisetaceae Gymnomitriaceae Eriocaulaceae Geraniaceae Erpodiaceae Erythroxylaceae Grossulariaceae Cunoniaceae Nymphaeaceae Tricholomataceae Fissidentaceae Flagellariaceae Limnanthaceae Leptodontaceae Fossombroniaceae Fouquieriaceae Frankeniaceae Pandanaceae Jubulaceae Fuscideaceae Garryaceae Sphaerocarpaceae Ginkgoaceae Molluginaceae Graphidaceae Gnetaceae Haloragaceae Trichocomaceae Greyiaceae Gunneraceae Solorinellaceae Gypsoplaceae Gyrothyraceae Haematommataceae Schaereriaceae Styracaceae Hanguanaceae Haplomitriaceae Olacaceae Heliconiaceae Micareaceae Helodiaceae Pterobryaceae Heppiaceae Herbertaceae Hernandiaceae Linaceae Pterigynandraceae Hippocrateaceae Hippuridaceae Neckeraceae Hookeriaceae Myristicaceae Lycopodiaceae Violaceae Limnocharitaceae Peltigeraceae Hylocomiaceae Hymenophyllaceae Pittosporaceae Hypopterygiaceae Icacinaceae Aquifoliaceae Illiciaceae Balsaminaceae Isoetaceae Theophrastaceae Joinvilleaceae Juncaceae Pleosporaceae Placynthiaceae Mastodiaceae Krameriaceae Haemodoraceae Lemnaceae Umbilicariaceae Psoraceae Leitneriaceae Piperaceae Odontotremataceae Letrouitiaceae Leucobryaceae Epacridaceae Phyllachoraceae Lichenotheliaceae Juncaginaceae Magnoliaceae Rimulariaceae Plantaginaceae Leotiaceae Lophosoriaceae Gigaspermaceae Lunulariaceae Lygodiaceae Thelypteridaceae Marcgraviaceae Marsileaceae Mastigophoraceae Mayacaceae Dendrocerotaceae Megalosporaceae Melanommataceae Melaspileaceae Melianthaceae Sabiaceae Menyanthaceae Mesoptychiaceae Microcaliciaceae Asterothyriaceae Pallaviciniaceae Polygalaceae Moringaceae Clavariaceae Mycoblastaceae Mycoporaceae Myriniaceae Myxotrichaceae Najadaceae Zosteraceae Hypocreaceae Nelumbonaceae Nepenthaceae Nephromataceae Ramalinaceae Notothyladaceae Ochnaceae Pertusariaceae Oedipodiaceae Resedaceae Ophioparmaceae Osmundaceae Oxymitraceae Paeoniaceae Passifloraceae Plagiochilaceae Pelliaceae Monosoleniaceae Peltulaceae Monimiaceae Achatocarpaceae Philydraceae Phlyctidaceae Lennoaceae Stereocaulaceae Rafflesiaceae Lentibulariaceae Turneraceae Plagiotheciaceae Platanaceae Pleuroziaceae Pleuroziopsidaceae Podostemaceae Salicaceae Thamnobryaceae Posidoniaceae Potamogetonaceae Protothelenellaceae Pseudoditrichaceae Psilotaceae Ptilidiaceae Punicaceae Pyrenotrichaceae Rhizogoniaceae Racopilaceae Radulaceae Strelitziaceae Rhachitheciaceae Rhytidiaceae Ricciaceae Riellaceae Ruppiaceae Adelococcaceae Salviniaceae Goodeniaceae Scheuchzeriaceae Schisandraceae Schistostegaceae Triuridaceae Scouleriaceae Selaginellaceae Simmondsiaceae Smilacaceae Sonneratiaceae Sparganiaceae Mycosphaerellaceae Sphagnaceae Sphenocleaceae Sphinctrinaceae Splachnobryaceae Stackhousiaceae Staphyleaceae Strigulaceae Surianaceae Symplocaceae Syzygosporaceae Taccaceae Tamaricaceae Targioniaceae Taxaceae Tetraphidaceae Theliaceae Thrombiaceae Timmiaceae Trapaceae Tremellaceae Trichocoleaceae Tropaeolaceae Typhaceae Vezdaeaceae Xyridaceae Zannichelliaceae	Acaena Adenostoma Agrimonia Alchemilla Amelanchier Amelasorbus Aphanes Argentina Aruncus Cercocarpus Chaenomeles Chamaebatia Chamaebatiaria Chamaerhodos Coleogyne Comarum Cotoneaster Crataegus Cydonia Dalibarda Dasiphora Dryas Duchesnea Eriobotrya Exochorda Fallugia Filipendula Fragaria Geum Gillenia Heteromeles Holodiscus Horkelia Horkeliella Ivesia Kelseya Kerria Luetkea Lyonothamnus Malacomeles Malus Mespilus Neviusia Oemleria Osteomeles Peraphyllum Petrophytum Photinia Physocarpus Potentilla Prinsepia Prunus Pseudocydonia Purshia Pyracantha Pyrus Quillaja Rhaphiolepis Rhodotypos Rosa Rubus Sanguisorba Sibbaldia Sibbaldiopsis Sorbaria Sorbaronia Sorbus Spiraea Spiraeanthus Stephanandra Vauquelinia Waldsteinia	1) Pyrus calleryana Decne. 2) Pyrus communis L. 3) Pyrus pyrifolia (Burm. f.) Nakai 4) Pyrus ussuriensis Maxim.
Pictures: genus Pyrus (North America): Pyrus calleryana Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Views: 556 Pyrus calleryana � 2014 Vito Buono - Bari - Views: 544 Pyrus calleryana � 2014 Vito Buono - Bari - Views: 551 Pyrus communis Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Comune di Merano, Giardini di Castel Trauttmansdorff ., BZ, Trentino-Alto Adige, Italia, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Views: 505 Pyrus communis Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Comune di Foiano della Chiana., AR, Toscana, Italia, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Views: 472 Pyrus communis Bosc variety at Foodland Pukalani, Maui - Credit: Forest and Kim Starr - Plants of Hawaii - Image licensed under a Creative Commons Attribution 3.0 License, permitting sharing and adaptation with attribution. - Views: 486 Pyrus pyrifolia Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Berlin, Botanischer Garten und Botanisches Museum Berlin-Dahlem, Germania, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Views: 560 Pyrus pyrifolia Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Berlin, Botanischer Garten und Botanisches Museum Berlin-Dahlem, Germania, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Views: 562 Pyrus pyrifolia Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Berlin, Botanischer Garten und Botanisches Museum Berlin-Dahlem, Germania, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Views: 561 Pyrus ussuriensis Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Richmond-upon-Thames, Royal Botanic Gardens, Kew, UK, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Views: 176 Pyrus ussuriensis Herman, D.E., et al. 1996. North Dakota tree handbook. USDA NRCS ND State Soil Conservation Committee; NDSU Extension and Western Area Power Administration, Bismarck. - Non-Copyrighted Image - Views: 170 Pyrus ussuriensis Herman, D.E., et al. 1996. North Dakota tree handbook. USDA NRCS ND State Soil Conservation Committee; NDSU Extension and Western Area Power Administration, Bismarck. - Non-Copyrighted Image - Views: 169