This list includes plants native and introduced to the state of Ohio, designated (N) and (I), respectively. Varieties and subspecies link to their parent species.
A Abies balsamea var. balsamea (I) Abutilon theophrasti (I) Acalypha deamii (N) Acalypha gracilens (N) Acalypha ostryifolia (N) Acalypha rhomboidea (N) Acalypha virginica (N) Acer campestre (I) Acer × freemanii (N) Acer ginnala (I) Acer negundo var. negundo (N) Acer negundo var. violaceum (N) Acer nigrum (N) Acer palmatum (I) Acer pensylvanicum (N) Acer platanoides (I) Acer rubrum var. rubrum (N) Acer rubrum var. trilobum (N) Acer saccharinum (N) Acer saccharum var. saccharum (N) Acer spicatum (N) Acer tataricum (I) Achillea millefolium var. occidentalis (N) Achillea millefolium var. millefolium (I) Achillea ptarmica (I) Achyranthes japonica var. hachijoensis (I) Acinos arvensis, synonym of Clinopodium acinos (I) Aconitum noveboracense (N) Aconitum uncinatum ssp. uncinatum (N) Acorus americanus (N) Acorus calamus (I) Acroptilon repens (I) Actaea pachypoda (N) Actaea racemosa var. racemosa (N) Actaea rubra ssp. rubra (N) Actinidia arguta (I) Adenocaulon bicolor (N) Adiantum capillus-veneris (N) Adiantum pedatum (N) Adlumia fungosa (N) Aegilops cylindrica (I) Aegopodium podagraria (I) Aesculus flava (N) Aesculus glabra var. glabra (N) Aesculus hippocastanum (I) Aesculus × marylandica (N) Aethusa cynapium (I) Agalinis auriculata (N) Agalinis gattingeri (N) Agalinis paupercula var. borealis (N) Agalinis paupercula var. paupercula (N) Agalinis purpurea (N) Agalinis skinneriana (N) Agalinis tenuifolia var. macrophylla (N) Agalinis tenuifolia var. parviflora (N) Agalinis tenuifolia var. tenuifolia (N) Agastache nepetoides (N) Agastache scrophulariifolia (N) Ageratina altissima var. altissima (N) Ageratina aromatica var. aromatica (N) Agrimonia eupatoria (I) Agrimonia gryposepala (N) Agrimonia microcarpa (N) Agrimonia parviflora (N) Agrimonia pubescens (N) Agrimonia rostellata (N) Agrimonia striata (N) Agropyron desertorum (I) Agrostemma githago (I) Agrostis avenacea (I) Agrostis capillaris (I) Agrostis elliottiana (N) Agrostis gigantea (I) Agrostis hyemalis (N) Agrostis perennans (N) Agrostis scabra (N) Agrostis stolonifera (I) Ailanthus altissima (I) Aira caryophyllea var. caryophyllea (I) Ajuga genevensis (I) Ajuga reptans (I) Akebia quinata (I) Albizia julibrissin (I) Alcea rosea (I) Aletris farinosa (N) Alisma subcordatum (N) Alisma triviale (N) Alliaria petiolata (I) Allium ampeloprasum (I) Allium burdickii (N) Allium canadense var. canadense (N) Allium cepa (I) Allium cernuum var. cernuum (N) Allium porrum (I) Allium sativum (I) Allium schoenoprasum (I) Allium schoenoprasum var. sibiricum (N) Allium tricoccum (N) Allium vineale ssp. vineale (I) Alnus × fallacina (N) Alnus glutinosa (I) Alnus incana ssp. rugosa (N) Alnus serrulata (N) Alopecurus aequalis var. aequalis (N) Alopecurus carolinianus (N) Alopecurus geniculatus var. geniculatus (I) Alopecurus myosuroides (I) Alopecurus myosuroides (N) Alopecurus pratensis (I) Althaea officinalis (I) Alyssum alyssoides (I) Amaranthus albus (I) Amaranthus blitoides (I) Amaranthus blitum var. emarginatus (I) Amaranthus cruentus (I) Amaranthus deflexus (I) Amaranthus hybridus (N) Amaranthus palmeri (N) Amaranthus powellii ssp. powellii (N) Amaranthus retroflexus (N) Amaranthus spinosus (N) Amaranthus tuberculatus (N) Ambrosia artemisiifolia var. elatior (N) Ambrosia artemisiifolia var. elatior (I) Ambrosia bidentata (N) Ambrosia × helenae (N) Ambrosia trifida var. trifida (N) Amelanchier arborea var. arborea (N) Amelanchier interior (N) Amelanchier laevis (N) Amelanchier sanguinea var. sanguinea (N) Amelanchier stolonifera (N) Ammannia coccinea (N) Ammannia robusta (N) Ammophila breviligulata (N) Amorpha fruticosa (N) Ampelopsis aconitifolia (I) Ampelopsis arborea (N) Ampelopsis glandulosa var. brevipedunculata (I) Ampelopsis cordata (N) Amphiachyris dracunculoides (N) Amphicarpaea bracteata var. bracteata (N) Amphicarpaea bracteata var. comosa (N) Amsinckia lycopsoides (N) Amsonia tabernaemontana var. salicifolia (N) Anagallis arvensis ssp. foemina (N) Anagallis arvensis ssp. arvensis (I) Anagallis arvensis ssp. foemina (I) Anagallis minima (N) Anaphalis margaritacea (N) Anchusa arvensis (I) Anchusa azurea (I) Anchusa officinalis (I) Andromeda polifolia var. glaucophylla (N) Andropogon gerardi (N) Andropogon glomeratus var. glomeratus (N) Andropogon gyrans var. gyrans (N) Andropogon virginicus var. virginicus (N) Androsace occidentalis (N) Anemone blanda (I) Anemone canadensis (N) Anemone cylindrica (N) Anemone quinquefolia var. bifolia (N) Anemone quinquefolia var. quinquefolia (N) Anemone virginiana var. virginiana (N) Anethum graveolens (I) Angelica atropurpurea (N) Angelica venenosa (N) Anoda cristata (N) Antennaria howellii ssp. canadensis (N) Antennaria howellii ssp. neodioica (N) Antennaria howellii ssp. petaloidea (N) Antennaria neglecta (N) Antennaria parlinii ssp. fallax (N) Antennaria parlinii ssp. parlinii (N) Antennaria plantaginifolia (N) Antennaria solitaria (N) Antennaria virginica (N) Anthemis arvensis (I) Anthemis cotula (I) Anthemis tinctoria (I) Anthoxanthum aristatum (I) Anthoxanthum odoratum ssp. odoratum (I) Anthriscus caucalis (I) Anthriscus sylvestris (I) Anthyllis vulneraria (I) Antirrhinum majus (I) Apera interrupta (I) Apera spica-venti (I) Apios americana (N) Apium graveolens var. dulce (N) Apium graveolens var. dulce (I) Aplectrum hyemale (N) Apocynum androsaemifolium (N) Apocynum cannabinum (N) Apocynum × floribundum (N) Aquilegia canadensis (N) Aquilegia vulgaris (I) Arabidopsis thaliana (I) Arabis canadensis (N) Arabis × divaricarpa (N) Arabis drummondii (N) Arabis glabra (N) Arabis hirsuta var. pycnocarpa (N) Arabis laevigata var. laevigata (N) Arabis lyrata (N) Arabis missouriensis (N) Arabis patens (N) Arabis shortii (N) Aralia elata (I) Aralia hispida (N) Aralia nudicaulis (N) Aralia racemosa ssp. racemosa (N) Aralia spinosa (N) Arctium lappa (I) Arctium minus (I) Arctostaphylos uva-ursi (N) Arenaria serpyllifolia (I) Arethusa bulbosa (N) Argemone albiflora ssp. albiflora (N) Argemone mexicana (N) Argentina anserina (N) Arisaema dracontium (N) Arisaema triphyllum ssp. pusillum (N) Arisaema triphyllum ssp. stewardsonii (N) Arisaema triphyllum ssp. triphyllum (N) Aristida dichotoma var. dichotoma (N) Aristida longespica var. geniculata (N) Aristida longespica var. longespica (N) Aristida oligantha (N) Aristida purpurascens var. purpurascens (N) Aristida ramosissima (N) Aristolochia clematitis (I) Aristolochia serpentaria (N) Aristolochia tomentosa (N) Armoracia rusticana (I) Arnoglossum atriplicifolium (N) Arnoglossum plantagineum (N) Arnoglossum reniforme (N) Arnoseris minima (I) Arrhenatherum elatius var. elatius (I) Artemisia absinthium (I) Artemisia annua (I) Artemisia biennis (N) Artemisia biennis var. biennis (I) Artemisia campestris ssp. borealis var. borealis (N) Artemisia campestris ssp. caudata (N) Artemisia gmelinii (I) Artemisia ludoviciana ssp. albula (N) Artemisia ludoviciana ssp. ludoviciana (N) Artemisia pontica (I) Artemisia stelleriana (I) Artemisia stelleriana (N) Artemisia vulgaris (N) Artemisia vulgaris var. vulgaris (I) Arthraxon hispidus (I) Aruncus dioicus (I) Aruncus dioicus var. dioicus (N) Arundinaria gigantea ssp. gigantea (N) Asarum canadense (N) Asclepias amplexicaulis (N) Asclepias exaltata (N) Asclepias hirtella (N) Asclepias incarnata ssp. incarnata (N) Asclepias purpurascens (N) Asclepias quadrifolia (N) Asclepias sullivantii (N) Asclepias syriaca (N) Asclepias tuberosa ssp. interior (N) Asclepias tuberosa ssp. tuberosa (N) Asclepias variegata (N) Asclepias verticillata (N) Asclepias viridiflora (N) Asclepias viridis (N) Asimina triloba (N) Asparagus officinalis (I) Asperugo procumbens (I) Asplenium bradleyi (N) Asplenium × clermontiae (N) Asplenium × ebenoides (N) Asplenium × gravesii (N) Asplenium × inexpectatum (N) Asplenium × kentuckiense (N) Asplenium montanum (N) Asplenium pinnatifidum (N) Asplenium platyneuron var. platyneuron (N) Asplenium resiliens (N) Asplenium rhizophyllum (N) Asplenium ruta-muraria var. cryptolepis (N) Asplenium ruta-muraria var. lanceolum (N) Asplenium trichomanes ssp. quadrivalens (N) Asplenium trichomanes ssp. trichomanes (N) Asplenium × trudellii (N) Aster tataricus (I) Astragalus canadensis var. canadensis (N) Astragalus neglectus (N) Athyrium filix-femina ssp. angustum (N) Athyrium filix-femina ssp. asplenioides (N) Atriplex hortensis (I) Atriplex patula (I) Atriplex prostrata (N) Atriplex rosea (I) Aureolaria flava var. flava (N) Aureolaria flava var. macrantha (N) Aureolaria levigata (N) Aureolaria pedicularia var. ambigens (N) Aureolaria pedicularia var. pedicularia (N) Aureolaria virginica (N) Aurinia saxatilis (I) Avena fatua (I) Avena sativa (I) Azolla caroliniana (N)
B Ballota nigra var. alba (I) Baptisia alba var. macrophylla (N) Baptisia australis var. australis (N) Baptisia tinctoria (N) Barbarea verna (I) Barbarea vulgaris (I) Bartonia virginica (N) Bassia hirsuta (I) Bassia scoparia (I) Beckmannia syzigachne (N) Belamcanda chinensis (I) Bellis perennis (I) Berberis canadensis (N) Berberis × ottawensis (N) Berberis thunbergii (I) Berberis vulgaris (I) Berteroa incana (I) Besseya bullii (N) Betula alleghaniensis var. alleghaniensis (N) Betula alleghaniensis var. macrolepis (N) Betula lenta (N) Betula nigra (N) Betula papyrifera var. papyrifera (N) Betula pendula (I) Betula populifolia (N) Betula pubescens (N) Betula pubescens ssp. pubescens (I) Betula pumila var. pumila (N) Betula × purpusii (N) Bidens aristosa (N) Bidens beckii (N) Bidens bipinnata (N) Bidens cernua (N) Bidens connata (N) Bidens coronata (N) Bidens discoidea (N) Bidens frondosa (N) Bidens laevis (N) Bidens tripartita (N) Bidens vulgata (N) Bignonia capreolata (N) Blephilia ciliata (N) Blephilia hirsuta var. hirsuta (N) Boehmeria cylindrica (N) Boltonia asteroides var. recognita (N) Borago officinalis (I) Botrychium biternatum (N) Botrychium dissectum (N) Botrychium lanceolatum var. angustisegmentum (N) Botrychium matricariifolium (N) Botrychium multifidum (N) Botrychium oneidense (N) Botrychium simplex (N) Botrychium virginianum (N) Bouteloua curtipendula var. curtipendula (N) Bouteloua gracilis (N) Bouteloua hirsuta var. hirsuta (N) Brachyelytrum erectum (N) Brasenia schreberi (N) Brassica juncea (I) Brassica napus (I) Brassica nigra (I) Brassica oleracea (I) Brassica rapa var. amplexicaulis (I) Brassica rapa var. rapa (I) Brickellia eupatorioides var. corymbulosa (N) Brickellia eupatorioides var. eupatorioides (N) Bromus arvensis (I) Bromus briziformis (I) Bromus catharticus (I) Bromus ciliatus var. ciliatus (N) Bromus erectus (I) Bromus hordeaceus ssp. hordeaceus (I) Bromus inermis (N) Bromus inermis ssp. inermis var. inermis (I) Bromus kalmii (N) Bromus latiglumis (N) Bromus nottowayanus (N) Bromus pubescens (N) Bromus racemosus (I) Bromus secalinus var. secalinus (I) Bromus sterilis (I) Bromus tectorum (I) Broussonetia papyrifera (I) Browallia americana (I) Brunnera macrophylla (I) Buchnera americana (N) Buddleja davidii (I) Buglossoides arvensis (I) Bulbostylis capillaris ssp. capillaris (N) Bunias orientalis (I) Bupleurum lancifolium (I) Bupleurum rotundifolium (I) Butomus umbellatus (I) Buxus sempervirens (I)
C Cabomba caroliniana var. caroliniana (N) Cakile edentula ssp. edentula var. lacustris (N) Cakile edentula ssp. edentula (N) Calamagrostis canadensis var. canadensis (N) Calamagrostis canadensis var. macouniana (N) Calamagrostis coarctata (N) Calamagrostis porteri ssp. insperata (N) Calamagrostis stricta ssp. inexpansa (N) Calamovilfa longifolia var. magna (N) Calendula officinalis (I) Calla palustris (N) Callitriche heterophylla ssp. heterophylla (N) Callitriche palustris (N) Callitriche terrestris (N) Calluna vulgaris (I) Calopogon tuberosus var. tuberosus (N) Caltha palustris var. palustris (N) Calycanthus floridus var. glaucus (N) Calystegia hederacea (I)