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Introduced species in Ohio

577 species reported here that are listed as introduced

Listed as introduced by US-RIIS (the lower 48 states) or iNaturalist's Ohio checklist. Invasive species are those US-RIIS or Ohio's rules list as invasive, as causing or likely to cause harm. A species missing from this list is not necessarily native.

Sources: US-RIIS 2.0, iNaturalist's Ohio checklist and Ohio's invasive-species rules

577 species

greater snowdrop (Galanthus elwesii)greater snowdropGalanthus elwesii · Flowering plantsPhoto © sd058818 · CC BY-NC 4.0Late December to late March, middle week Feb 22–28common snowdrop (Galanthus nivalis)common snowdropGalanthus nivalis · Flowering plantsPhoto © nvicens · CC BY-NC 4.0Early February to early April, middle week Mar 8–14Winter Aconite (Eranthis hyemalis)Winter AconiteEranthis hyemalis · Flowering plantsPhoto © Nicolas Schwab · CC BY-NC 4.0Early February to early May, middle week Mar 8–14Woodland crocus (Crocus tommasinianus)Woodland crocusCrocus tommasinianus · Flowering plantsPhoto © Jörg Hempel · CC BY-SA 4.0Late February to late March, middle week Mar 8–14Forbes' Glory-of-the-snow (Scilla forbesii)Forbes' Glory-of-the-snowScilla forbesii · Flowering plantsPhoto © esdena · CC BY-NC 4.0Late March to mid-April, middle week Mar 29 – Apr 4Ivy-leaved Speedwell (Veronica hederifolia)Ivy-leaved SpeedwellVeronica hederifolia · Flowering plantsPhoto © rowantoad · CC BY-NC 4.0Early March to late April, middle week Mar 29 – Apr 4Ring-necked Pheasant (Phasianus colchicus)Ring-necked PheasantPhasianus colchicus · BirdsEarly in its seasonPhoto © Frank Lin · CC BY-NC 4.0Late October to late June, middle week Mar 29 – Apr 4Siberian squill (Scilla siberica)Siberian squillScilla siberica · Flowering plantsPhoto © Kristian Peters · CC BY-NC-SA 4.0Early March to mid-April, middle week Mar 29 – Apr 4Common Whitlowgrass (Draba verna)Common WhitlowgrassDraba verna · Flowering plantsPhoto © crgillette · CC BY 4.0Early March to late April, middle week Apr 5–11Greek anemone (Anemone blanda)Greek anemoneAnemone blanda · Flowering plantsPhoto © Li Jianong · CC BY-NC 4.0Mid-March to late April, middle week Apr 5–11henbit deadnettle (Lamium amplexicaule)henbit deadnettleLamium amplexicaule · Flowering plantsEarly in its seasonPhoto © Hernán A. Santibáñez G. · CC BY-NC 4.0Late October to early May, middle week Apr 5–11Hyacinth (Hyacinthus orientalis)HyacinthHyacinthus orientalis · Flowering plantsPhoto © gemmamorabito · CC BY-NC 4.0Late March to late April, middle week Apr 5–11lesser celandine (Ficaria verna)lesser celandineFicaria verna · Flowering plantsPhoto © Bernard Picton · CC BY 4.0Early March to early May, middle week Apr 5–11striped squill (Puschkinia scilloides)striped squillPuschkinia scilloides · Flowering plantsPhoto © Ann Teve · CC BY-NC 4.0Late March to mid-April, middle week Apr 5–11wild daffodil (Narcissus pseudonarcissus)wild daffodilNarcissus pseudonarcissus · Flowering plantsPhoto © Gilles San Martin · CC BY-SA 4.0Early March to late April, middle week Apr 5–11bird's-eye speedwell (Veronica persica)bird's-eye speedwellVeronica persica · Flowering plantsPhoto © liriodendron_tulipifera · CC BY-NC 4.0Early March to late May, middle week Apr 12–18Blue Anemone (Anemone apennina)Blue AnemoneAnemone apennina · Flowering plantsPhoto © Paolo Mazzei · CC BY-NC 4.0Late March to late April, middle week Apr 12–18colt's-foot (Tussilago farfara)colt's-footTussilago farfara · Flowering plantsPhoto © snsergeevna · CC BY-NC 4.0Mid-March to late September, middle week Apr 12–18common chickweed (Stellaria media)common chickweedStellaria media · Flowering plantsEarly in its seasonPhoto © Jim Walker · CC BY-NC 4.0Early November to mid-May, middle week Apr 12–18common grape hyacinth (Muscari botryoides)common grape hyacinthMuscari botryoides · Flowering plantsPhoto © Sébastien SANT · CC BY-NC 4.0Late March to early May, middle week Apr 12–18garlic penny-cress (Mummenhoffia alliacea)garlic penny-cressMummenhoffia alliacea · Flowering plantsPhoto © Emily Feist · CC BY-NC 4.0Mid-March to mid-May, middle week Apr 12–18Microthlaspi perfoliatumMicrothlaspi perfoliatumMicrothlaspi perfoliatum · Flowering plantsPhoto © Юрий Данилевский (Yuriy Danilevsky) · CC BY 4.0Mid-March to early May, middle week Apr 12–18Drooping Star-of-Bethlehem (Ornithogalum nutans)Drooping Star-of-BethlehemOrnithogalum nutans · Flowering plantsPhoto © Nicolas Zwahlen · CC BY-NC-SA 4.0Early April to early May, middle week Apr 19–25Horn-faced Mason Bee (Osmia cornifrons)Horn-faced Mason BeeOsmia cornifrons · Bees, wasps and antsPhoto © Bill Keim · CC BY 4.0Late March to early May, middle week Apr 19–25lesser periwinkle (Vinca minor)lesser periwinkleVinca minor · Flowering plantsPhoto © Miroslav Marić · CC BY-NC 4.0Early March to mid-October, middle week Apr 19–25Poet's Narcissus (Narcissus poeticus)Poet's NarcissusNarcissus poeticus · Flowering plantsPhoto © rachelpurchase1 · CC BY-NC 4.0Early April to early May, middle week Apr 19–25Taurus Mason Bee (Osmia taurus)Taurus Mason BeeOsmia taurus · Bees, wasps and antsPhoto © Riley-Brendan Walsh · CC BY-NC 4.0Late March to early May, middle week Apr 19–25Cuckooflower (Cardamine pratensis)CuckooflowerCardamine pratensis · Flowering plantsPhoto © Karen Andrea Boehme · CC BY-NC 4.0Mid-April to late May, middle week Apr 26 – May 2Eurasian Red-and-black Melyrid (Anthocomus equestris)Eurasian Red-and-black MelyridAnthocomus equestris · BeetlesPhoto © gbohne · CC BY-SA 4.0Mid-March to early June, middle week Apr 26 – May 2Little Sweet Betsy (Trillium cuneatum)Little Sweet BetsyTrillium cuneatum · Flowering plantsPhoto © Jason Love · CC BY-NC 4.0Late March to mid-May, middle week Apr 26 – May 2Slender speedwell (Veronica filiformis)Slender speedwellVeronica filiformis · Flowering plantsPhoto © AnneTanne · CC BY-NC-SA 4.0Early April to late May, middle week Apr 26 – May 2Summer snowflake (Leucojum aestivum)Summer snowflakeLeucojum aestivum · Flowering plantsPhoto © Markus Ackermann · CC BY-NC 4.0Late March to mid-May, middle week Apr 26 – May 2yellow wakerobin (Trillium luteum)yellow wakerobinTrillium luteum · Flowering plantsPhoto © northganaturalist · CC BY-NC 4.0Mid-April to mid-May, middle week Apr 26 – May 2blue forget-me-not (Myosotis stricta)blue forget-me-notMyosotis stricta · Flowering plantsPhoto © Eric Keith · CC BY-NC 4.0Mid-April to late May, middle week May 3–9carpet bugle (Ajuga reptans)carpet bugleAjuga reptans · Flowering plantsPhoto © Анна · CC BY-NC 4.0Mid-April to late August, middle week May 3–9catchweed bedstraw (Galium aparine)catchweed bedstrawGalium aparine · Flowering plantsPhoto © Magnus Hagdorn · CC BY-SA 4.0Mid-March to early June, middle week May 3–9common dandelion (Taraxacum officinale)common dandelionTaraxacum officinale · Flowering plantsPhoto © Paul Reeves · CC BY-NC-SA 4.0Late March to early November, middle week May 3–9Larder Beetle (Dermestes lardarius)Larder BeetleDermestes lardarius · BeetlesLate in its seasonPhoto © Stuart Tingley · CC BY-NC 4.0Mid-March to mid-November, middle week May 3–9red-seeded dandelion (Taraxacum erythrospermum)red-seeded dandelionTaraxacum erythrospermum · Flowering plantsPhoto © Tim Quinn · CC BY-NC 4.0Early April to mid-October, middle week May 3–9Bulbous Bluegrass (Poa bulbosa)Bulbous BluegrassPoa bulbosa · Flowering plantsPhoto © Sebastian Ćato · CC BY-NC 4.0Mid-April to mid-June, middle week May 10–16common star-of-Bethlehem (Ornithogalum umbellatum)common star-of-BethlehemOrnithogalum umbellatum · Flowering plantsPhoto © Hannah Blumenfeld · CC BY-SA 4.0Late April to late May, middle week May 10–16corn speedwell (Veronica arvensis)corn speedwellVeronica arvensis · Flowering plantsPhoto © kale2012 · CC BY-NC 4.0Mid-April to early June, middle week May 10–16European field pansy (Viola arvensis)European field pansyViola arvensis · Flowering plantsPhoto © Alexis Tinker-Tsavalas · CC BY 4.0Early April to mid-June, middle week May 10–16European lily of the valley (Convallaria majalis)European lily of the valleyConvallaria majalis · Flowering plantsPhoto © prellinchen · CC BY-NC 4.0Mid-April to mid-September, middle week May 10–16field penny-cress (Thlaspi arvense)field penny-cressThlaspi arvense · Flowering plantsPhoto © josefwirth · CC BY-NC 4.0Early April to late June, middle week May 10–16field peppergrass (Lepidium campestre)field peppergrassLepidium campestre · Flowering plantsPhoto © Radio Tonreg · CC BY 4.0Late April to late June, middle week May 10–16greater periwinkle (Vinca major)greater periwinkleVinca major · Flowering plantsPhoto © Σάββας Ζαφειρίου (Savvas Zafeiriou) · CC BY-NC 4.0Late March to mid-October, middle week May 10–16ground-ivy (Glechoma hederacea)ground-ivyGlechoma hederacea · Flowering plantsPhoto © viktorie_kolouchova · CC BY-NC 4.0Early April to mid-October, middle week May 10–16

Showing 48 of 577

More lists for Ohio

Missing records do not mean a species is absent.