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 IBAM Iberis amara L. annual candytuft IBGI Iberis gibraltarica L. Gibraltar candytuft IBPR2 Iberis pruitii Tineo Pruit's candytuft IBSE Iberis sempervirens L. evergreen candytuft IBUM Iberis umbellata L. globe candytuft IBLU Ibicella lutea (Lindl.) Van Eselt. yellow unicorn-plant ILAQ80 Ilex aquifolium L. English holly ILCO80 Ilex cornuta Lindl. & Paxton Chinese holly ILCR2 Ilex crenata Thunb. Japanese holly ILPA2 Ilex paraguayensis St.-Hil. Paraguay tea ILVE3 Illecebrum verticillatum L. coral necklace IMBA2 Impatiens balfourii Hook. f. Balfour's touch-me-not IMBA Impatiens balsamina L. spotted snapweed IMGL Impatiens glandulifera Royle ornamental jewelweed IMOL Impatiens oliveri C. Wright ex W. Wats. Oliver's touch-me-not IMWA Impatiens walleriana Hook. f. buzzy lizzy IMBR Imperata brasiliensis Trin. Brazilian satintail IMCY Imperata cylindrica (L.) Beauv. cogongrass INCO82 Indigofera colutea (Burm. f.) Merr. rusty indigo INHI Indigofera hirsuta L. roughhairy indigo INKI Indigofera kirilowii Maxim. ex Palibin Kirilow's indigo INPA Indigofera ?parviflora K. Heyne ex Wight & Arn. smallflower indigo INPI Indigofera pilosa Poir. softhairy indigo INSP2 Indigofera spicata Forsk. trailing indigo INTI Indigofera tinctoria L. true indigo INTR2 Indigofera trifoliata L. threeleaf indigo INNO Inga nobilis Willd. INNOQ Inga nobilis Willd. ssp. quaternata (Poepp. & Endl.) T.D. Pennington guama venezolano INBR Inula britannica L. British yellowhead INHE Inula helenium L. elecampane inula INSA Inula salicina L. willowleaf yellowhead IOAC2 Ionopsidium acaule (Desf.) Reichenb. false diamondflower IPAM Ipomoea amnicola Morong redcenter morning-glory IPAQ Ipomoea aquatica Forsk. swamp morning-glory IPAS Ipomoea asarifolia (Desr.) Roemer & J.A. Schultes IPBA2 Ipomoea batatas (L.) Lam. sweetpotato IPCA Ipomoea cairica (L.) Sweet mile a minute vine IPCA5 Ipomoea carnea Jacq. gloria de la manana IPCAF Ipomoea carnea Jacq. ssp. fistulosa (Mart. ex Choisy) D. Austin gloria de la manana IPCO3 Ipomoea coccinea L. redstar IPCO9 Ipomoea cordifolia Carey ex Voight heartleaf morning-glory IPHE Ipomoea hederacea Jacq. ivyleaf morning-glory IPIN Ipomoea indica (Burm. f.) Merr. oceanblue morning-glory IPLI2 Ipomoea littoralis Blume whiteflower beach morning-glory† IPOB Ipomoea obscura (L.) Ker-Gawl. obscure morning-glory IPOC2 Ipomoea ochracea (Lindl.) G. Don fence morning-glory‡ IPOCO Ipomoea ochracea (Lindl.) G. Don var. ochracea fence morning-glory IPPU2 Ipomoea purpurea (L.) Roth tall morning-glory IPQU Ipomoea quamoclit L. cypressvine IPSE3 Ipomoea setosa Ker-Gawl. Brazilian morning-glory IPTR3 Ipomoea tricolor Cav. grannyvine† IPTU3 Ipomoea turbinata Lag. lilacbell† IPWR Ipomoea wrightii Gray Wright's morning-glory IRHE3 Iresine herbstii Hook. ex Lindl. Herbst's bloodleaf IRLI Iresine lindenii Van Houtte Linden's bloodleaf IRAP Iris aphylla L. stool iris IREN Iris ensata Thunb. Russian iris IRFL2 Iris flavescens Delile lemonyellow iris IRFU2 Iris ×fulvala Dykes [brevicaulis × fulva] IRGE Iris germanica L. German iris IRLA4 Iris laevigata Fisch. rabbitear iris IROR Iris orientalis P. Mill. yellowband iris IRPA2 Iris pallida Lam. sweet iris IRPS Iris pseudacorus L. paleyellow iris IRPU2 Iris pumila L. dwarf iris IRSA2 Iris sanguinea Hornem. ex Donn Japanese iris IRSI Iris sibirica L. Siberian iris IRSP80 Iris spuria L. seashore iris IRSPO Iris spuria L. ssp. ochroleuca (L.) Dykes seashore iris IRTE4 Iris tectorum Maxim. wall iris IRVA Iris variegata L. Hungarian iris IRXI Iris xiphium L. Spanish iris ISTI Isatis tinctoria L. Dyer's woad ISIN3 Ischaemum indicum (Houtt.) Merr. Indian murainagrass ISRU Ischaemum rugosum Salisb. ribbed murainagrass ISTI3 Ischaemum timorense Kunth stalkleaf murainagrass ISOP Isocarpha oppositifolia (L.) Cass. Rio Grande pearlhead ISHY2 Isolepis hystrix (Thunb.) Nees bottlebrush bulrush ISSE2 Isolepis setacea (L.) R. Br. bristleleaf bulrush IVCH Iva cheiranthifolia Kunth fly marshelder IXST Ixeris stolonifera Gray creeping lettuce IXCA Ixia campanulata Houtt. belllflower African cornlily IXMA Ixia maculata L. spotted African cornlily IXUN Ixophorus unisetus (J. Presl) Schlechter Mexican grass IXAC Ixora acuminata Roxb. bola de nieve IXCO Ixora coccinea L. scarlet jungleflame IXPA Ixora pavetta Andrews torch tree IXTH Ixora thwaitesii Hook. f. white jungleflame

† 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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