Introduced Plants of the U.S. Click on an accepted name below to view its Plant Profile with all synonyms, distribution map, more information, and web links if available.

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Symbol Scientific Name Common Name IRLA4 Iris laevigata Fisch. rabbitear iris TRAR4 Trifolium arvense L. rabbitfoot clover NERA2 Nepeta racemosa Lam. raceme catnip LYFL3 Lychnis flos-cuculi L. ragged robin BAPA3 Bauhinia pauletia Pers. railroadfence SASA10 Samanea saman (Jacq.) Merr. raintree CARA Campanula rapunculoides L. rampion bellflower REPH Reseda phyteuma L. rampion mignonette GUAB Guizotia abyssinica (L. f.) Cass. ramtilla QUIN10 Quisqualis indica L. Rangoon creeper BRNA Brassica napus L. rape COFO3 Commelina forskaolii Vahl rat's ear VUMY Vulpia myuros (L.) K.C. Gmel. rat-tail fescue SPINC3 Sporobolus indicus (L.) R. Br. var. capensis Engelm. rat-tail grass SEPU7 Sesbania punicea (Cav.) Benth. rattlebox BRBR5 Bromus briziformis Fisch. & C.A. Mey. rattlesnake brome CACR19 Calathea crotalifera S. Wats. rattlesnake plant SARA3 Saccharum ravennae (L.) L. ravennagrass AMCR4 Amaranthus cruentus L. red amaranth ODVE Odontites vernus (Bellardi) Dumort. red bartsia ODVES Odontites vernus (Bellardi) Dumort. ssp. serotinus (Dumort.) Corb. red bartsia ADPA Adenanthera pavonina L. red beadtree EUGU2 Eucalyptus gummifera (Soland. ex Gaertn.) Hochr. red bloodwood BRRU2 Bromus rubens L. red brome SIDI4 Silene dioica (L.) Clairville red catchfly TRPR2 Trifolium pratense L. red clover RUBU3 Rumex bucephalophorus L. red dock CHFU Chrysopogon fulvus (Spreng.) Chiov. red false beardgrass ALPU4 Alpinia purpurata (Vieill.) K. Schum. red ginger CRRU9 Crepis rubra L. red hawksbeard GALA Galeopsis ladanum L. red hempnettle GALAL Galeopsis ladanum L. var. ladanum red hempnettle GALAL2 Galeopsis ladanum L. var. latifolia (Hoffmann) Wallr. red hempnettle EUSI2 Eucalyptus sideroxylon A. Cunningham red ironbark MESA3 Melastoma sanguineum Sims red melastome ALRU4 Alysicarpus rugosus (Willd.) DC. red moneywort NOVE Nonea vesicaria (L.) Reichenb. red monkswort PAMA15 Passiflora manicata (Juss.) Pers. red passionflower LACI Lathyrus cicera L. red pea SPRU Spergularia rubra (L.) J.& K. Presl red sandspurry LYRA Lycoris radiata (L'Hér.) Herbert red spider lily CECA2 Centaurea calcitrapa L. red star-thistle CERU2 Centranthus ruber (L.) DC. red valerian EUPO Eucalyptus polyanthemos Schauer redbox IPAM Ipomoea amnicola Morong redcenter morning-glory ESRU4 Escallonia rubra (Ruiz & Pavón) Pers. redclaws ESRUM Escallonia rubra (Ruiz & Pavón) Pers. var. macrantha (Hook. & Arn.) Reiche redclaws PHRU7 Phyllostachys rubromarginata McClure reddish bamboo VIBE Vicia benghalensis L. reddish tufted vetch HERE6 Hemigraphis reptans (G. Forst.) T. Anders. ex Hemsl. redflame EUFI81 Eucalyptus ficifolia F. Muell. redflower gum CRCR9 Crassocephalum crepidioides (Benth.) S. Moore redflower ragleaf LACO5 Lampranthus coccineus (Haw.) N.E. Br. redflush EUCA Eucalyptus calophylla R. Br. redgum KNUV80 Kniphofia uvaria (L.) Oken redhot poker HEAL12 Hemigraphis alternata (Burm. f.) T. Anders. redivy RORU2 Rosa rubrifolia Vill. redleaf rose EURE2 Eucalyptus resinifera Sm. redmahogany SEEL Senecio elegans L. redpurple ragwort AMRE Amaranthus retroflexus L. redroot amaranth OEGL Oenothera glazioviana Micheli redsepal evening-primrose IPCO3 Ipomoea coccinea L. redstar ERCI6 Erodium cicutarium (L.) L'Hér. ex Ait. redstem stork's bill ERCIB2 Erodium cicutarium (L.) L'Hér. ex Ait. ssp. bipinnatum Tourlet redstem stork's bill ERCIC Erodium cicutarium (L.) L'Hér. ex Ait. ssp. cicutarium redstem stork's bill ERCIJ Erodium cicutarium (L.) L'Hér. ex Ait. ssp. jacquinianum (Fisch., C.A. Mey. & Avé-Lall.) Briq. redstem stork's bill ARSC4 Artemisia scoparia Waldst. & Kit. redstem wormwood AGGI2 Agrostis gigantea Roth redtop RUSA2 Rumex sanguineus L. redvein dock GLMA3 Glyceria maxima (Hartman) Holmb. reed mannagrass SPCA10 Spiraea cantoniensis Lour. Reeves' meadowsweet LIRE6 Lilium regale E.E. Wilson regal lily PEDO2 Pelargonium ×domesticum Bailey (pro sp.) [angulosum × cucullatum] regal pelargonium LIRE12 Lipocarpha ?rehmanii (Ridley) Goetghebeur Rehman's halfchaff sedge AECE Aegopogon cenchroides Humb. & Bonpl. relaxgrass ALRE3 Alopecurus rendlei Eig. Rendle's meadow foxtail BRCA6 Bromus catharticus Vahl rescuegrass LYSQ Lycoris squamigera Maxim. resurrection lily KARO3 Kaempferia rotundata L. resurrection-lily TRRE4 Trifolium resupinatum L. reversed clover CHGA2 Chloris gayana Kunth Rhodes grass ISRU Ischaemum rugosum Salisb. ribbed murainagrass PAMA6 Paspalum malacophyllum Trin. ribbed paspalum HOPL5 Homalocladium platycladum (F.J. Muell.) Bailey ribbonbush ORSA Oryza sativa L. rice ECOR2 Echinochloa oryzicola Vasinger rice barnyardgrass CYIR Cyperus iria L. ricefield flatsedge NAGR2 Najas graminea Delile ricefield waternymph TEPA Tetrapanax papyriferus (Hook.) K. Koch ricepaper plant BIGA Bidens gardneri Baker ridge beggartick CHCA12 Chenopodium carnosulum Moq. ridged goosefoot CHCAP Chenopodium carnosulum Moq. var. patagonicum (Phil.) H.A. Wahl ridged goosefoot BRAN2 Brachiaria annulatum (Forsk.) Stapf ringed signalgrass† ISOP Isocarpha oppositifolia (L.) Cass. Rio Grande pearlhead BRDI3 Bromus diandrus Roth ripgut brome BRRI8 Bromus rigidus Roth ripgut brome EUCA2 Eucalyptus camaldulensis Dehnhardt river redgum CACU8 Casuarina cunninghamiana Miq. river sheoak TRTU2 Triticum turgidum L. rivet wheat CADE14 Cardamine debilis D. Don roadside bittercress BRST3 Bromus stamineus Desv. roadside brome CRTR8 Croton trinitatis Millsp. roadside croton BEMU Berteroa mutabilis (Vent.) DC. roadside false madwort LERU Lepidium ruderale L. roadside pepperweed LIAE2 Linaria aeruginea (Gouan) Cav. roadside toadflax TACH3 Tabebuia chrysantha (Jacq.) Nichols. roble amarillo TALA2 Taraxacum laevigatum (Willd.) DC. rock dandelion PSLU2 Pseudofumaria lutea (L.) Borkh. rock fumewort SERU5 Senecio rupestris Waldst. & Kit. rock ragwort SAOC80 Saponaria ocymoides L. rock soapwort ERVE5 Eruca vesicaria (L.) Cav. rocketsalad ERVES Eruca vesicaria (L.) Cav. ssp. sativa (P. Mill.) Thellung rocketsalad AGCL3 Agdestis clematidea Moc. & Sessé ex DC. rockroot CHNO3 Chamaemelum nobile (L.) All. Roman chamomile ARPO4 Artemisia pontica L. Roman wormwood CAPR Calotropis procera (Ait.) Ait. f. roostertree WORA Woodwardia radicans (L.) J. Sm. rooting chainfern PEGR14 Pereskia grandifolia Haw. rose cactus LYCO Lychnis coronaria (L.) Desr. rose campion TRHI4 Trifolium hirtum All. rose clover CLBU Clerodendrum bungei Steud. rose glorybower NORO Nonea rosea (Bieb.) Link rose monkswort POGR7 Portulaca grandiflora Hook. rose moss RHTO Rhodomyrtus tomentosus (Ait.) Hassk. rose myrtle MERE9 Melinis repens (Willd.) Zizka rose Natal grass HISY Hibiscus syriacus L. rose of Sharon PECA13 Pelargonium capitatum (L.) L'Hér. ex Ait. rose scented geranium SICO14 Silene coeli-rosa (L.) Godr. rose silene HISA2 Hibiscus sabdariffa L. roselle ROOF Rosmarinus officinalis L. rosemary PSRO Pseudognaphalium roseum (Kunth) A. Anderb. rosy cudweed XARO2 Xanthosoma roseum Schott rosy malanga RORO Romulea rosea (L.) Ecklon rosy sandcrocus ROROA Romulea rosea (L.) Ecklon var. australis (Ewart) de Vos rosy sandcrocus CERO Centaurea rothrockii Greenm. Rothrock's knapweed ECMU2 Echinochloa muricata (Beauv.) Fern. rough barnyardgrass‡ ECMUM2 Echinochloa muricata (Beauv.) Fern. var. muricata rough barnyardgrass MESE2 Melampodium sericeum Lag. rough blackfoot POTR2 Poa trivialis L. rough bluegrass CHTE5 Chaerophyllum temulum L. rough chervil TRSC7 Trifolium scabrum L. rough clover BUHI Bulbostylis hirta (Thunb.) Svens. rough hairsedge LEHI4 Leontodon hirtus L. rough hawkbit CRBI3 Crepis biennis L. rough hawksbeard TOSC2 Torilis scabra (Thunb.) DC. rough hedgeparsley ADHI Adiantum hispidulum Sw. rough maidenhair MEJA Metaplexis japonica (Thunb.) Makino rough potato CAMU7 Carex muricata L. rough sedge CEAS2 Centaurea aspera L. rough star-thistle CISC4 Cirsium scabrum (Poir.) Bonnet & Barratte rough thistle MAHI6 Marsilea hirsuta R. Br. rough waterclover GATR6 Galium tricornutum Dandy roughfruit corn bedstraw INHI Indigofera hirsuta L. roughhairy indigo FOJA Fortunella japonica (Thunb.) Swingle round kumquat PAHY3 Papaver hybridum L. round pricklyhead poppy BLAU Blyxa aubertii L.C. Rich. roundfruit blyxa JUCO Juncus compressus Jacq. roundfruit rush SCHO6 Scirpoides holoschoenus (L.) Soják roundhead bulrush KISP Kickxia spuria (L.) Dumort. roundleaf cancerwort VIRO80 Vitex rotundifolia L. f. roundleaf chastetree GERO3 Geranium rotundifolium L. roundleaf geranium EUDE Eucalyptus deanei Maiden roundleaf gum PSEL4 Pseudognaphalium elegans (Kunth) Kartesz, comb. nov. ined. royal cudweed DRSP5 Drosanthemum speciosum (Haw.) Schwant. royal dewflower EPAT Epipactis atrorubens (O. Hoffmann) Bess. royal helleborine CORE2 Consolida regalis S.F. Gray royal knight's-spur CHNO2 Cheilanthes notholaenoides (Desv.) Maxon ex Weatherby royal lipfern DERE Delonix regia (Bojer ex Hook.) Raf. royal poinciana ELHO3 Elymus hoffmannii K.B. Jensen & K.H. Asay RS wheatgrass ENRU Encyclia rufa (Lindl.) Britt. & Millsp. rufous butterfly orchid RORU Rosa rugosa Thunb. rugosa rose OPCO2 Oplismenus compositus (L.) Beauv. running mountaingrass ARPR3 Arabis ?procurrens Waldst. & Kit. running rockcress NAAS2 Narcissus assoanus Dufour rushleaf jonquil IREN Iris ensata Thunb. Russian iris EUESU Euphorbia esula L. var. uralensis (Fisch. ex Link) Dorn Russian leafy spurge ASFA3 Astragalus falcatus Lam. Russian milkvetch ELAN Elaeagnus angustifolia L. Russian olive CAFR80 Caragana frutex (L.) K. Koch Russian peashrub AXAM Axyris amaranthoides L. Russian pigweed SITU2 Sisymbrium turczaninowii Sonder Russian rocket TAAR6 Tamarix aralensis Bunge Russian tamarisk SAKA Salsola kali L. Russian thistle SAKAK Salsola kali L. ssp. kali Russian thistle SAKAP Salsola kali L. ssp. pontica (Pallas) Mosyakin Russian thistle PSJU3 Psathyrostachys juncea (Fisch.) Nevski Russian wildrye INCO82 Indigofera colutea (Burm. f.) Merr. rusty indigo BRSE Bromus secalinus L. rye brome

† Probably introduced to the U.S.

‡ Some populations in the U.S. are native and others are introduced from other countries

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