Ohio florası listesi

Bu liste, sırasıyla (N) ve (I) olarak belirtilen Ohio eyaletine özgü ve tanıtılan bitkileri içerir. Çeşitler ve alt türler ana türlerine bağlanmıştır.

## A
*''Abies balsamea'' var. ''balsamea'' (I)
**[[Abutilon theophrasti]]* (I)
**[[Acalypha deamii]]* (N)
**[[Acalypha gracilens]]* (N)
**[[Acalypha ostryifolia]]* (N)
**[[Acalypha rhomboidea]]* (N)
**[[Acalypha virginica]]* (N)
**[[Ova akçaağacı|Acer campestre]]* (I)
**[[Acer × freemanii]]* (N)
**[[Acer ginnala]]* (I)
*''Acer negundo'' var. ''negundo'' (N)
*''Acer negundo'' var. ''violaceum'' (N)
**[[Acer nigrum]]* (N)
**[[Japon akçaağacı|Acer palmatum]]* (I)
**[[Acer pensylvanicum]]* (N)
**[[Çınar yapraklı akçaağaç|Acer platanoides]]* (I)
*''Acer rubrum'' var. ''rubrum'' (N)
*''Acer rubrum'' var. ''trilobum'' (N)
**[[Gümüşi akçaağaç|Acer saccharinum]]* (N)
*''Acer saccharum'' var. ''saccharum'' (N)
**[[Acer spicatum]]* (N)
**[[Tatar akçaağacı|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)
**[[Venüssaçı|Adiantum capillus-veneris]]* (N)
**[[Adiantum pedatum]]* (N)
**[[Adlumia fungosa]]* (N)
**[[Aegilops cylindrica]]* (I)
**[[Aegopodium podagraria]]* (I)
**[[Aesculus flava]]* (N)
*''Aesculus glabra'' var. ''glabra'' (N)
**[[Beyaz çiçekli at kestanesi|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)
**[[Kokar ağaç|Ailanthus altissima]]* (I)
*''Aira caryophyllea'' var. ''caryophyllea'' (I)
**[[Ajuga genevensis]]* (I)
**[[Ajuga reptans]]* (I)
**[[Akebia quinata]]* (I)
**[[Gülibrişim|Albizia julibrissin]]* (I)
**[[Gülhatmi|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)
**[[Soğan|Allium cepa]]* (I)
*''Allium cernuum'' var. ''cernuum'' (N)
**[[Allium porrum]]* (I)
**[[Sarımsak|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)
**[[Dere otu|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)
**[[Çobangülü|Anthyllis vulneraria]]* (I)
**[[Aslanağzı|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)
**[[Bayır turpu|Armoracia rusticana]]* (I)
**[[Arnoglossum atriplicifolium]]* (N)
**[[Arnoglossum plantagineum]]* (N)
**[[Arnoglossum reniforme]]* (N)
**[[Arnoseris minima]]* (I)
*''Arrhenatherum elatius'' var. ''elatius'' (I)
**[[Pelin otu|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)
**[[Bayağı yavşan|Artemisia vulgaris]]* (N)
*''Artemisia vulgaris'' var. ''vulgaris'' (I)
**[[Arthraxon hispidus]]* (I)
**[[Gelinpüskülü|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)
**[[Bayağı papav|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)
**[[Beyaz yulaf|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)
**[[Koyungözü|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)
**[[Adi huş|Betula pendula]]* (I)
**[[Betula populifolia]]* (N)
**[[Tüylü huş|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)
**[[Hodan|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)
**[[Kanola|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)
*''Calystegia sepium'' ssp. ''americana'' (N)
*''Calystegia sepium'' ssp. ''angulata'' (N)
*''Calystegia sepium'' ssp. ''sepium'' (I)
**[[Calystegia silvatica]]* (I)
*''Calystegia silvatica'' ssp. ''fraterniflora'' (N)
*''Calystegia spithamaea'' ssp. ''spithamaea'' (N)
**[[Camassia scilloides]]* (N)
**[[Camelina microcarpa]]* (I)
*''Camelina sativa'' ssp. ''sativa'' (I)
**[[Campanula aparinoides]]* (N)
**[[Campanula rapunculoides]]* (I)
**[[Campanula rotundifolia]]* (N)
**[[Campanula trachelium]]* (I)
**[[Campanulastrum americanum]]* (N)
**[[Campsis radicans]]* (N)
*''Cannabis sativa'' ssp. ''sativa'' var. ''sativa'' (I)
**[[Çobançantası|Capsella bursa-pastoris]]* (I)
**[[Cardamine angustata]]* (N)
**[[Cardamine bulbifera]]* (I)
**[[Cardamine bulbosa]]* (N)
**[[Cardamine concatenata]]* (N)
**[[Cardamine diphylla]]* (N)
**[[Cardamine dissecta]]* (N)
**[[Cardamine douglassii]]* (N)
**[[Cardamine flexuosa]]* (I)
**[[Cardamine hirsuta]]* (I)
**[[Cardamine impatiens]]* (I)
**[[Cardamine maxima]]* (N)
*''Cardamine parviflora'' var. ''arenicola'' (N)
**[[Cardamine pensylvanica]]* (N)
*''Cardamine pratensis'' var. ''pratensis'' (N)
**[[Cardamine rotundifolia]]* (N)
**[[Cardaria draba]]* (I)
**[[Cardiospermum halicacabum]]* (I)
**[[Carduus acanthoides]]* (I)
**[[Carduus crispus]]* (I)
**[[Carduus nutans]]* (I)
**[[Carex aggregata]]* (N)
**[[Carex alata]]* (N)
*''Carex albicans'' var. ''albicans'' (N)
*''Carex albicans'' var. ''emmonsii'' (N)
**[[Carex albolutescens]]* (N)
**[[Carex albursina]]* (N)
**[[Carex alopecoidea]]* (N)
**[[Carex amphibola]]* (N)
**[[Carex annectens]]* (N)
**[[Carex appalachica]]* (N)
*''Carex aquatilis'' var. ''aquatilis'' (N)
**[[Carex arctata]]* (N)
**[[Carex argyrantha]]* (N)
**[[Carex atherodes]]* (N)
*''Carex atlantica'' ssp. ''atlantica'' (N)
*''Carex atlantica'' ssp. ''capillacea'' (N)
**[[Carex aurea]]* (N)
**[[Carex bebbii]]* (N)
**[[Carex bicknellii]]* (N)
**[[Carex blanda]]* (N)
**[[Carex brevior]]* (N)
*''Carex bromoides'' ssp. ''bromoides'' (N)
*''Carex brunnescens'' ssp. ''sphaerostachya'' (N)
**[[Carex bushii]]* (N)
**[[Carex buxbaumii]]* (N)
*''Carex canescens'' ssp. ''canescens'' (N)
*''Carex canescens'' ssp. ''disjuncta'' (N)
**[[Carex careyana]]* (N)
**[[Carex caroliniana]]* (N)
**[[Carex cephaloidea]]* (N)
**[[Carex cephalophora]]* (N)
*''Carex communis'' var. ''communis'' (N)
**[[Carex comosa]]* (N)
**[[Carex conjuncta]]* (N)
**[[Carex conoidea]]* (N)
**[[Carex crawei]]* (N)
*''Carex crinita'' var. ''brevicrinis'' (N)
*''Carex crinita'' var. ''crinita'' (N)
**[[Carex cristatella]]* (N)
**[[Carex crus-corvi]]* (N)
**[[Carex cryptolepis]]* (N)
**[[Carex cumberlandensis]]* (N)
**[[Carex davisii]]* (N)
*''Carex debilis'' var. ''debilis'' (N)
*''Carex debilis'' var. ''rudgei'' (N)
**[[Carex decomposita]]* (N)
*''Carex deweyana'' var. ''deweyana'' (N)
**[[Carex diandra]]* (N)
*''Carex digitalis'' var. ''digitalis'' (N)
**[[Carex disperma]]* (N)
**[[Carex eburnea]]* (N)
*''Carex echinata'' ssp. ''echinata'' (N)
**[[Carex emoryi]]* (N)
**[[Carex festucacea]]* (N)
**[[Carex flava]]* (N)
**[[Carex folliculata]]* (N)
**[[Carex formosa]]* (N)
**[[Carex frankii]]* (N)
**[[Carex garberi]]* (N)
**[[Carex glaucodea]]* (N)
**[[Carex gracilescens]]* (N)
**[[Carex gracillima]]* (N)
**[[Carex granularis]]* (N)
**[[Carex grayi]]* (N)
**[[Carex grisea]]* (N)
**[[Carex gynandra]]* (N)
**[[Carex haydenii]]* (N)
**[[Carex hirsutella]]* (N)
**[[Carex hirtifolia]]* (N)
**[[Carex hitchcockiana]]* (N)
**[[Carex hyalinolepis]]* (N)
**[[Carex hystericina]]* (N)
**[[Carex interior]]* (N)
**[[Carex intumescens]]* (N)
**[[Carex jamesii]]* (N)
**[[Carex juniperorum]]* (N)
**[[Carex lacustris]]* (N)
**[[Carex laevivaginata]]* (N)
*''Carex lasiocarpa'' var. ''americana'' (N)
*''Carex laxiculmis'' var. ''copulata'' (N)
*''Carex laxiculmis'' var. ''laxiculmis'' (N)
*''Carex laxiflora'' var. ''laxiflora'' (N)
**[[Carex leavenworthii]]* (N)
*''Carex leptalea'' ssp. ''leptalea'' (N)
**[[Carex leptonervia]]* (N)
**[[Carex limosa]]* (N)
**[[Carex longii]]* (N)
**[[Carex louisianica]]* (N)
*''Carex lucorum'' var. ''lucorum'' (N)
**[[Carex lupuliformis]]* (N)
**[[Carex lupulina]]* (N)
**[[Carex lurida]]* (N)
*''Carex magellanica'' ssp. ''irrigua'' (N)
**[[Carex meadii]]* (N)
**[[Carex merritt-fernaldii]]* (N)
**[[Carex mesochorea]]* (N)
**[[Carex molesta]]* (N)
*''Carex muehlenbergii'' var. ''enervis'' (N)
*''Carex muehlenbergii'' var. ''muehlenbergii'' (N)
**[[Carex muskingumensis]]* (N)
**[[Carex nigromarginata]]* (N)
**[[Carex normalis]]* (N)
**[[Carex oligocarpa]]* (N)
*''Carex oligosperma'' var. ''oligosperma'' (N)
**[[Carex pallescens]]* (N)
**[[Carex peckii]]* (N)
**[[Carex pedunculata]]* (N)
**[[Carex pellita]]* (N)
**[[Carex pensylvanica]]* (N)
**[[Carex planispicata]]* (N)
**[[Carex plantaginea]]* (N)
**[[Carex platyphylla]]* (N)
**[[Carex praegracilis]]* (N)
**[[Carex prairea]]* (N)
**[[Carex prasina]]* (N)
**[[Carex projecta]]* (N)
**[[Carex pseudocyperus]]* (N)
**[[Carex purpurifera]]* (N)
**[[Carex radiata]]* (N)
**[[Carex retroflexa]]* (N)
**[[Carex retrorsa]]* (N)
**[[Carex richardsonii]]* (N)
**[[Carex rosea]]* (N)
*''Carex sartwellii'' var. ''sartwellii'' (N)
**[[Carex scabrata]]* (N)
*''Carex scoparia'' var. ''scoparia'' (N)
**[[Carex seorsa]]* (N)
**[[Carex shortiana]]* (N)
**[[Carex siccata]]* (N)
**[[Carex sparganioides]]* (N)
**[[Carex spicata]]* (I)
**[[Carex sprengelii]]* (N)
**[[Carex squarrosa]]* (N)
**[[Carex sterilis]]* (N)
*''Carex stipata'' var. ''maxima'' (N)
*''Carex stipata'' var. ''stipata'' (N)
**[[Carex straminea]]* (N)
**[[Carex striatula]]* (N)
**[[Carex stricta]]* (N)
**[[Carex styloflexa]]* (N)
**[[Carex suberecta]]* (N)
**[[Carex × subimpressa]]* (N)
**[[Carex × sullivantii]]* (N)
**[[Carex swanii]]* (N)
**[[Carex tenera]]* (N)
**[[Carex tenuiflora]]* (N)
**[[Carex tetanica]]* (N)
**[[Carex texensis]]* (N)
**[[Carex timida]]* (N)
*''Carex tonsa'' var. ''rugosperma'' (N)
**[[Carex torta]]* (N)
*''Carex tribuloides'' var. ''tribuloides'' (N)
**[[Carex trichocarpa]]* (N)
*''Carex trisperma'' var. ''trisperma'' (N)
**[[Carex tuckermanii]]* (N)
**[[Carex typhina]]* (N)
**[[Carex umbellata]]* (N)
**[[Carex utriculata]]* (N)
*''Carex vesicaria'' var. ''monile'' (N)
**[[Carex virescens]]* (N)
*''Carex viridula'' ssp. ''viridula'' (N)
*''Carex vulpinoidea'' var. ''vulpinoidea'' (N)
**[[Carex willdenowii]]* (N)
**[[Carex woodii]]* (N)
*''Carpinus caroliniana'' ssp. ''virginiana'' (N)
**[[Aspir|Carthamus tinctorius]]* (I)
**[[Carum carvi]]* (I)
**[[Carya alba]]* (N)
**[[Carya × brownii]]* (N)
**[[Carya cordiformis]]* (N)
**[[Carya glabra]]* (N)
**[[Carya illinoinensis]]* (N)
**[[Carya laciniosa]]* (N)
**[[Carya ovalis]]* (N)
**[[Carya ovata]]* (N)
**[[Castanea dentata]]* (N)
*''Castanea pumila'' var. ''pumila'' (N)
**[[Castilleja coccinea]]* (N)
**[[Catalpa bignonioides]]* (N)
**[[Catalpa ovata]]* (I)
**[[Catalpa speciosa]]* (N)
**[[Caulophyllum giganteum]]* (N)
**[[Caulophyllum thalictroides]]* (N)
**[[Ceanothus americanus]]* (N)
**[[Ceanothus herbaceus]]* (N)
**[[Celastrus orbiculatus]]* (I)
**[[Celastrus scandens]]* (N)
**[[Celosia argentea]]* (I)
**[[Celtis occidentalis]]* (N)
**[[Celtis tenuifolia]]* (N)
**[[Cenchrus longispinus]]* (N)
**[[Centaurea cyanus]]* (I)
**[[Centaurea diffusa]]* (I)
**[[Centaurea jacea]]* (I)
**[[Centaurea nigra]]* (I)
**[[Centaurea nigrescens]]* (I)
**[[Centaurea phrygia]]* (I)
**[[Centaurea scabiosa]]* (I)
**[[Centaurea solstitialis]]* (I)
*''Centaurea stoebe'' ssp. ''micranthos'' (I)
**[[Centaurea transalpina]]* (N)
**[[Centaurium erythraea]]* (I)
**[[Centaurium pulchellum]]* (I)
**[[Centella erecta]]* (N)
**[[Cephalanthus occidentalis]]* (N)
**[[Cerastium arvense]]* (I)
*''Cerastium arvense'' ssp. ''strictum'' (N)
*''Cerastium arvense'' ssp. ''velutinum'' var. ''velutinum'' (N)
*''Cerastium arvense'' ssp. ''velutinum'' (N)
**[[Cerastium brachypetalum]]* (I)
**[[Cerastium dubium]]* (I)
*''Cerastium fontanum'' ssp. ''vulgare'' (I)
**[[Cerastium glomeratum]]* (I)
*''Cerastium nutans'' var. ''nutans'' (N)
**[[Cerastium pumilum]]* (I)
**[[Cerastium semidecandrum]]* (I)
**[[Cerastium tomentosum]]* (I)
**[[Ceratocephala testiculata]]* (I)
**[[Ceratophyllum demersum]]* (N)
**[[Ceratophyllum echinatum]]* (N)
**[[Katsura ağacı|Cercidiphyllum japonicum]]* (I)
*''Cercis canadensis'' var. ''canadensis'' (N)
**[[Chaenomeles speciosa]]* (I)
**[[Chaenorhinum minus]]* (I)
*''Chaerophyllum procumbens'' var. ''procumbens'' (N)
*''Chaerophyllum procumbens'' var. ''shortii'' (N)
*''Chaerophyllum tainturieri'' var. ''tainturieri'' (N)
**[[Chaiturus marrubiastrum]]* (I)
*''Chamaecrista fasciculata'' var. ''fasciculata'' (N)
*''Chamaecrista nictitans'' ssp. ''nictitans'' var. ''nictitans'' (N)
*''Chamaecrista nictitans'' ssp. ''nictitans'' (N)
**[[Chamaedaphne calyculata]]* (N)
**[[Chamaelirium luteum]]* (N)
**[[Chamaemelum mixtum]]* (I)
**[[Chamaemelum nobile]]* (I)
**[[Chamaesyce humistrata]]* (N)
**[[Chamaesyce maculata]]* (N)
**[[Chamaesyce nutans]]* (N)
**[[Chamaesyce polygonifolia]]* (N)
**[[Chamaesyce prostrata]]* (N)
**[[Chamaesyce serpens]]* (N)
**[[Chamaesyce vermiculata]]* (N)
*''Chamerion angustifolium'' ssp. ''circumvagum'' (N)
**[[Chasmanthium latifolium]]* (N)
*''Chelidonium majus'' var. ''majus'' (I)
**[[Chelone glabra]]* (N)
*''Chenopodium album'' var. ''missouriense'' (N)
*''Chenopodium album'' var. ''album'' (I)
*''Chenopodium ambrosioides'' var. ''ambrosioides'' (I)
*''Chenopodium berlandieri'' var. ''bushianum'' (N)
*''Chenopodium berlandieri'' var. ''zschackii'' (N)
**[[Chenopodium botrys]]* (I)
**[[Chenopodium capitatum]]* (N)
**[[Chenopodium glaucum]]* (I)
**[[Chenopodium glaucum]]* (N)
**[[Chenopodium humile]]* (I)
**[[Chenopodium humile]]* (N)
*''Chenopodium incanum'' var. ''incanum'' (N)
**[[Chenopodium murale]]* (I)
*''Chenopodium polyspermum'' var. ''acutifolium'' (I)
**[[Chenopodium pratericola]]* (N)
**[[Chenopodium pumilio]]* (I)
**[[Chenopodium simplex]]* (N)
**[[Chenopodium standleyanum]]* (N)
**[[Chenopodium subglabrum]]* (N)
**[[Chenopodium urbicum]]* (I)
**[[Chenopodium vulvaria]]* (I)
**[[Chimaphila maculata]]* (N)
*''Chimaphila umbellata'' ssp. ''cisatlantica'' (N)
**[[Chionanthus virginicus]]* (N)
**[[Chloris verticillata]]* (N)
**[[Chloris virgata]]* (N)
**[[Chorispora tenella]]* (I)
**[[Chrysanthemum × morifolium]]* (I)
*''Chrysogonum virginianum'' var. ''virginianum'' (N)
**[[Chrysopsis mariana]]* (N)
**[[Chrysosplenium americanum]]* (N)
**[[Beyaz hindiba|Cichorium intybus]]* (I)
**[[Cicuta bulbifera]]* (N)
*''Cicuta maculata'' var. ''maculata'' (N)
**[[Cinna arundinacea]]* (N)
**[[Cinna latifolia]]* (N)
*''Circaea alpina'' ssp. ''alpina'' (N)
**[[Circaea × intermedia]]* (N)
*''Circaea lutetiana'' ssp. ''canadensis'' (N)
**[[Cirsium altissimum]]* (N)
**[[Köygöçerten|Cirsium arvense]]* (I)
**[[Cirsium canescens]]* (N)
**[[Cirsium carolinianum]]* (N)
**[[Cirsium discolor]]* (N)
**[[Cirsium muticum]]* (N)
**[[Cirsium pumilum]]* (N)
**[[Cirsium vulgare]]* (I)
*''Citrullus lanatus'' var. ''lanatus'' (I)
**[[Cladium mariscoides]]* (N)
**[[Cladrastis kentukea]]* (N)
**[[Clarkia pulchella]]* (N)
*''Claytonia caroliniana'' var. ''caroliniana'' (N)
*''Claytonia virginica'' var. ''virginica'' (N)
*''Clematis occidentalis'' var. ''occidentalis'' (N)
**[[Clematis terniflora]]* (I)
**[[Clematis viorna]]* (N)
**[[Clematis virginiana]]* (N)
**[[Cleome hassleriana]]* (I)
**[[Cleome serrulata]]* (N)
**[[Clinopodium arkansanum]]* (N)
**[[Clinopodium vulgare]]* (N)
**[[Clintonia borealis]]* (N)
**[[Clintonia umbellulata]]* (N)
**[[Clitoria mariana]]* (N)
**[[Coix lacryma-jobi]]* (I)
**[[Collinsia verna]]* (N)
**[[Collinsonia canadensis]]* (N)
**[[Collinsonia verticillata]]* (N)
**[[Collomia linearis]]* (N)
**[[Colutea arborescens]]* (I)
*''Comandra umbellata'' ssp. ''umbellata'' (N)
**[[Comarum palustre]]* (N)
**[[Commelina communis]]* (I)
*''Commelina diffusa'' var. ''diffusa'' (N)
**[[Commelina virginica]]* (N)
**[[Comptonia peregrina]]* (N)
**[[Conioselinum chinense]]* (N)
**[[Baldıran|Conium maculatum]]* (I)
**[[Conoclinium coelestinum]]* (N)
**[[Conopholis americana]]* (N)
**[[Conringia orientalis]]* (I)
**[[Consolida ajacis]]* (I)
**[[Consolida regalis]]* (I)
**[[Müge|Convallaria majalis]]* (I)
**[[Tarla sarmaşığı|Convolvulus arvensis]]* (I)
*''Conyza canadensis'' var. ''canadensis'' (N)
*''Conyza canadensis'' var. ''pusilla'' (N)
**[[Conyza ramosissima]]* (N)
**[[Coptis trifolia]]* (N)
*''Corallorhiza maculata'' var. ''maculata'' (N)
*''Corallorhiza odontorhiza'' var. ''odontorhiza'' (N)
**[[Corallorhiza trifida]]* (N)
**[[Corallorhiza wisteriana]]* (N)
*''Coreopsis grandiflora'' var. ''harveyana'' (N)
**[[Coreopsis lanceolata]]* (N)
**[[Coreopsis major]]* (N)
*''Coreopsis tinctoria'' var. ''tinctoria'' (N)
**[[Coreopsis tripteris]]* (N)
**[[Coreopsis verticillata]]* (N)
**[[Kişniş|Coriandrum sativum]]* (I)
*''Corispermum americanum'' var. ''americanum'' (N)
**[[Corispermum pallasii]]* (I)
**[[Corispermum pallasii]]* (N)
**[[Cornus alternifolia]]* (N)
**[[Cornus amomum]]* (N)
**[[Cornus × arnoldiana]]* (N)
**[[Cornus canadensis]]* (N)
**[[Cornus drummondii]]* (N)
**[[Cornus florida]]* (N)
**[[Cornus obliqua]]* (N)
**[[Cornus racemosa]]* (N)
**[[Cornus rugosa]]* (N)
*''Cornus sericea'' ssp. ''sericea'' (N)
**[[Coronilla scorpioides]]* (I)
**[[Coronopus didymus]]* (I)
**[[Corydalis aurea]]* (N)
**[[Corydalis flavula]]* (N)
**[[Corydalis sempervirens]]* (N)
**[[Corylus americana]]* (N)
*''Corylus cornuta'' var. ''cornuta'' (N)
**[[Cosmos bipinnatus]]* (I)
**[[Cotinus coggygria]]* (I)
**[[Cotoneaster divaricatus]]* (I)
**[[Cotoneaster simonsii]]* (I)
**[[Crataegus × anomala]]* (N)
**[[Crataegus apiomorpha]]* (N)
**[[Crataegus arborea]]* (N)
**[[Crataegus ater]]* (N)
**[[Crataegus beata]]* (N)
**[[Crataegus brainerdii]]* (N)
**[[Crataegus calpodendron]]* (N)
*''Crataegus chrysocarpa'' var. ''chrysocarpa'' (N)
**[[Crataegus coleae]]* (N)
**[[Crataegus compacta]]* (N)
**[[Crataegus compta]]* (N)
**[[Crataegus corusca]]* (N)
**[[Crataegus crus-galli]]* (N)
**[[Crataegus disperma]]* (N)
**[[Crataegus dissona]]* (N)
**[[Crataegus engelmannii]]* (N)
**[[Crataegus flabellata]]* (N)
**[[Crataegus holmesiana]]* (N)
**[[Crataegus × hudsonica]]* (N)
**[[Crataegus × immanis]]* (N)
**[[Crataegus indicens]]* (N)
**[[Crataegus intricata]]* (N)
**[[Crataegus iracunda]]* (N)
**[[Crataegus irrasa]]* (N)
**[[Crataegus jesupii]]* (N)
**[[Crataegus lucorum]]* (N)
**[[Crataegus macrosperma]]* (N)
**[[Crataegus margarettiae]]* (N)
**[[Crataegus mollis]]* (N)
**[[Adi alıç|Crataegus monogyna]]* (I)
**[[Crataegus nitida]]* (N)
**[[Crataegus pedicellata]]* (N)
**[[Crataegus pennsylvanica]]* (N)
**[[Crataegus persimilis]]* (N)
**[[Crataegus phaenopyrum]]* (N)
**[[Crataegus pringlei]]* (N)
**[[Crataegus prona]]* (N)
**[[Crataegus pruinosa]]* (N)
**[[Crataegus punctata]]* (N)
**[[Crataegus scabrida]]* (N)
**[[Crataegus schuettei]]* (N)
**[[Crataegus submollis]]* (N)
**[[Crataegus suborbiculata]]* (N)
**[[Crataegus succulenta]]* (N)
**[[Crataegus tanuphylla]]* (N)
**[[Crataegus uniflora]]* (N)
**[[Crepis biennis]]* (I)
**[[Crepis capillaris]]* (I)
**[[Crepis nicaeensis]]* (I)
**[[Crepis pulchra]]* (I)
**[[Crepis setosa]]* (I)
**[[Crepis tectorum]]* (I)
**[[Crotalaria sagittalis]]* (N)
*''Croton capitatus'' var. ''capitatus'' (N)
*''Croton glandulosus'' var. ''septentrionalis'' (N)
**[[Croton monanthogynus]]* (N)
**[[Cruciata pedemontana]]* (I)
**[[Crypsis schoenoides]]* (I)
**[[Cryptotaenia canadensis]]* (N)
**[[Kavun|Cucumis melo]]* (I)
**[[Salatalık|Cucumis sativus]]* (I)
**[[Cucurbita foetidissima]]* (N)
**[[Helvacı kabağı|Cucurbita maxima]]* (I)
**[[Kabak|Cucurbita pepo]]* (N)
*''Cucurbita pepo'' var. ''pepo'' (I)
**[[Cunila origanoides]]* (N)
**[[Cuphea viscosissima]]* (N)
**[[Cuscuta cephalanthi]]* (N)
*''Cuscuta compacta'' var. ''compacta'' (N)
**[[Cuscuta coryli]]* (N)
**[[Cuscuta epilinum]]* (I)
**[[Cuscuta epithymum]]* (I)
**[[Cuscuta glomerata]]* (N)
*''Cuscuta gronovii'' var. ''gronovii'' (N)
*''Cuscuta pentagona'' var. ''pentagona'' (N)
**[[Cuscuta polygonorum]]* (N)
**[[Cuscuta suaveolens]]* (I)
**[[Cyclachaena xanthifolia]]* (N)
**[[Cycloloma atriplicifolium]]* (N)
**[[Ayva|Cydonia oblonga]]* (I)
**[[Cymbalaria muralis]]* (I)
**[[Cynanchum laeve]]* (N)
**[[Cynanchum louiseae]]* (I)
**[[Cynodon dactylon]]* (I)
**[[Cynoglossum officinale]]* (I)
*''Cynoglossum virginianum'' var. ''boreale'' (N)
*''Cynoglossum virginianum'' var. ''virginianum'' (N)
**[[Cynosurus cristatus]]* (I)
**[[Cynosurus echinatus]]* (I)
**[[Cyperus acuminatus]]* (N)
**[[Cyperus amuricus]]* (I)
**[[Cyperus bipartitus]]* (N)
**[[Cyperus compressus]]* (N)
**[[Cyperus diandrus]]* (N)
**[[Cyperus echinatus]]* (N)
**[[Cyperus erythrorhizos]]* (N)
**[[Cyperus esculentus]]* (N)
*''Cyperus esculentus'' var. ''leptostachyus'' (I)
**[[Cyperus flavescens]]* (N)
**[[Cyperus houghtonii]]* (N)
**[[Cyperus iria]]* (I)
**[[Cyperus lancastriensis]]* (N)
*''Cyperus lupulinus'' ssp. ''lupulinus'' (N)
*''Cyperus lupulinus'' ssp. ''macilentus'' (N)
**[[Cyperus odoratus]]* (N)
**[[Cyperus refractus]]* (N)
**[[Cyperus retrofractus]]* (N)
**[[Cyperus schweinitzii]]* (N)
**[[Cyperus squarrosus]]* (N)
**[[Cyperus strigosus]]* (N)
**[[Cypripedium acaule]]* (N)
*''Cypripedium × andrewsii'' var. ''andrewsii'' (N)
*''Cypripedium × andrewsii'' var. ''landonii'' (N)
**[[Cypripedium candidum]]* (N)
*''Cypripedium parviflorum'' var. ''parviflorum'' (N)
*''Cypripedium parviflorum'' var. ''pubescens'' (N)
**[[Cypripedium reginae]]* (N)
**[[Cyrtomium falcatum]]* (I)
**[[Cystopteris bulbifera]]* (N)
**[[Cystopteris fragilis]]* (N)
**[[Cystopteris × illinoensis]]* (N)
**[[Cystopteris protrusa]]* (N)
**[[Cystopteris tennesseensis]]* (N)
**[[Cystopteris tenuis]]* (N)
**[[Cystopteris × wagneri]]* (N)
*''Cytisus scoparius'' var. ''scoparius'' (I)

## D
*''Dactylis glomerata'' ssp. ''glomerata'' (I)
**[[Dactyloctenium aegyptium]]* (I)
**[[Dactylorhiza viridis]]* (N)
**[[Dalea leporina]]* (N)
*''Dalea purpurea'' var. ''purpurea'' (N)
**[[Dalibarda repens]]* (N)
**[[Danthonia compressa]]* (N)
**[[Danthonia spicata]]* (N)
**[[Mezeryon|Daphne mezereum]]* (I)
*''Dasiphora fruticosa'' ssp. ''floribunda'' (N)
**[[Dasistoma macrophylla]]* (N)
**[[Datura stramonium]]* (I)
**[[Datura wrightii]]* (N)
**[[Daucus carota]]* (I)
**[[Decodon verticillatus]]* (N)
**[[Delphinium exaltatum]]* (N)
**[[Delphinium tricorne]]* (N)
**[[Dennstaedtia punctilobula]]* (N)
**[[Deparia acrostichoides]]* (N)
**[[Deschampsia cespitosa]]* (N)
**[[Deschampsia danthonioides]]* (N)
*''Deschampsia flexuosa'' var. ''flexuosa'' (N)
*''Descurainia pinnata'' ssp. ''brachycarpa'' (N)
**[[Descurainia sophia]]* (I)
**[[Desmanthus illinoensis]]* (N)
**[[Desmodium canadense]]* (N)
**[[Desmodium canescens]]* (N)
*''Desmodium ciliare'' var. ''ciliare'' (N)
*''Desmodium cuspidatum'' var. ''cuspidatum'' (N)
*''Desmodium cuspidatum'' var. ''longifolium'' (N)
**[[Desmodium glutinosum]]* (N)
**[[Desmodium illinoense]]* (N)
**[[Desmodium laevigatum]]* (N)
**[[Desmodium marilandicum]]* (N)
**[[Desmodium nudiflorum]]* (N)
**[[Desmodium obtusum]]* (N)
*''Desmodium paniculatum'' var. ''paniculatum'' (N)
**[[Desmodium pauciflorum]]* (N)
**[[Desmodium perplexum]]* (N)
**[[Desmodium rotundifolium]]* (N)
**[[Desmodium sessilifolium]]* (N)
**[[Desmodium viridiflorum]]* (N)
**[[Dianthus armeria]]* (I)
**[[Dianthus barbatus]]* (I)
**[[Dianthus deltoides]]* (I)
**[[Dianthus plumarius]]* (I)
**[[Diarrhena americana]]* (N)
**[[Diarrhena obovata]]* (N)
**[[Dicentra canadensis]]* (N)
**[[Dicentra cucullaria]]* (N)
**[[Dicentra eximia]]* (N)
*''Dichanthelium acuminatum'' var. ''acuminatum'' (N)
*''Dichanthelium acuminatum'' var. ''fasciculatum'' (N)
*''Dichanthelium acuminatum'' var. ''lindheimeri'' (N)
**[[Dichanthelium boreale]]* (N)
**[[Dichanthelium boscii]]* (N)
**[[Dichanthelium clandestinum]]* (N)
**[[Dichanthelium commutatum]]* (N)
**[[Dichanthelium depauperatum]]* (N)
*''Dichanthelium dichotomum'' var. ''dichotomum'' (N)
**[[Dichanthelium latifolium]]* (N)
**[[Dichanthelium laxiflorum]]* (N)
**[[Dichanthelium leibergii]]* (N)
**[[Dichanthelium linearifolium]]* (N)
**[[Dichanthelium longiligulatum]]* (N)
**[[Dichanthelium meridionale]]* (N)
*''Dichanthelium oligosanthes'' var. ''oligosanthes'' (N)
*''Dichanthelium oligosanthes'' var. ''scribnerianum'' (N)
*''Dichanthelium ovale'' var. ''addisonii'' (N)
*''Dichanthelium sabulorum'' var. ''patulum'' (N)
*''Dichanthelium sabulorum'' var. ''thinium'' (N)
*''Dichanthelium sphaerocarpon'' var. ''isophyllum'' (N)
*''Dichanthelium sphaerocarpon'' var. ''sphaerocarpon'' (N)
**[[Dichanthelium spretum]]* (N)
*''Dichanthelium villosissimum'' var. ''praecocius'' (N)
**[[Dichondra carolinensis]]* (N)
**[[Diervilla lonicera]]* (N)
**[[Digitalis grandiflora]]* (I)
**[[Yünlü yüksük otu|Digitalis lanata]]* (I)
**[[Digitalis lutea]]* (I)
*''Digitalis purpurea'' ssp. ''purpurea'' (I)
**[[Digitaria ciliaris]]* (N)
**[[Digitaria cognata]]* (N)
**[[Digitaria filiformis]]* (N)
**[[Digitaria ischaemum]]* (I)
**[[Digitaria sanguinalis]]* (N)
*''Diodia teres'' var. ''teres'' (N)
*''Diodia virginiana'' var. ''virginiana'' (N)
**[[Dioscorea polystachya]]* (I)
**[[Dioscorea quaternata]]* (N)
**[[Dioscorea villosa]]* (N)
**[[Diospyros virginiana]]* (N)
**[[Diplazium pycnocarpon]]* (N)
**[[Diplotaxis muralis]]* (I)
**[[Diplotaxis tenuifolia]]* (I)
**[[Dipsacus fullonum]]* (I)
**[[Dipsacus laciniatus]]* (I)
**[[Dipsacus sativus]]* (I)
**[[Dirca palustris]]* (N)
**[[Distichlis spicata]]* (N)
*''Dodecatheon meadia'' ssp. ''meadia'' (N)
**[[Doellingeria infirma]]* (N)
*''Doellingeria umbellata'' var. ''umbellata'' (N)
**[[Draba brachycarpa]]* (N)
*''Draba cuneifolia'' var. ''cuneifolia'' (N)
**[[Draba reptans]]* (N)
**[[Draba verna]]* (I)
**[[Dracocephalum parviflorum]]* (N)
**[[Drosera intermedia]]* (N)
*''Drosera rotundifolia'' var. ''rotundifolia'' (N)
**[[Dryopteris × benedictii]]* (N)
**[[Dryopteris × boottii]]* (N)
**[[Dryopteris carthusiana]]* (N)
**[[Dryopteris clintoniana]]* (N)
**[[Dryopteris cristata]]* (N)
**[[Dryopteris goldieana]]* (N)
**[[Dryopteris intermedia]]* (N)
**[[Dryopteris marginalis]]* (N)
**[[Dryopteris × mickelii]]* (N)
**[[Dryopteris × neowherryi]]* (N)
**[[Dryopteris × pittsfordensis]]* (N)
**[[Dryopteris × slossoniae]]* (N)
**[[Dryopteris × triploidea]]* (N)
**[[Dryopteris × uliginosa]]* (N)
**[[Duchesnea indica]]* (I)
*''Dulichium arundinaceum'' var. ''arundinaceum'' (N)
**[[Dyssodia papposa]]* (N)

## E
**[[Echinacea purpurea]]* (N)
**[[Echinochloa crus-galli]]* (I)
**[[Echinochloa frumentacea]]* (I)
*''Echinochloa muricata'' var. ''microstachya'' (N)
*''Echinochloa muricata'' var. ''muricata'' (N)
**[[Echinochloa walteri]]* (N)
**[[Echinocystis lobata]]* (N)
**[[Echinodorus berteroi]]* (N)
**[[Echium vulgare]]* (I)
**[[Eclipta prostrata]]* (N)
**[[Egeria densa]]* (I)
**[[Kuş iğdesi|Elaeagnus angustifolia]]* (I)
**[[Elaeagnus multiflora]]* (I)
*''Elaeagnus umbellata'' var. ''parvifolia'' (I)
**[[Elatine brachysperma]]* (N)
*''Eleocharis acicularis'' var. ''acicularis'' (N)
*''Eleocharis compressa'' var. ''compressa'' (N)
**[[Eleocharis elliptica]]* (N)
**[[Eleocharis engelmannii]]* (N)
**[[Eleocharis erythropoda]]* (N)
**[[Eleocharis geniculata]]* (N)
**[[Eleocharis intermedia]]* (N)
**[[Eleocharis obtusa]]* (N)
*''Eleocharis olivacea'' var. ''olivacea'' (N)
**[[Eleocharis ovata]]* (N)
*''Eleocharis palustris'' var. ''palustris'' (N)
**[[Eleocharis parvula]]* (N)
**[[Eleocharis quadrangulata]]* (N)
**[[Eleocharis quinqueflora]]* (N)
**[[Eleocharis rostellata]]* (N)
*''Eleocharis tenuis'' var. ''tenuis'' (N)
*''Eleocharis tenuis'' var. ''verrucosa'' (N)
**[[Eleocharis wolfii]]* (N)
**[[Elephantopus]] [[Elephantopus carolinianus|carolinianus]]* (N)
**[[Eleusine indica]]* (I)
**[[Ellisia nyctelea]]* (N)
**[[Elodea canadensis]]* (N)
**[[Elodea nuttallii]]* (N)
**[[Elymus canadensis]]* (N)
*''Elymus hystrix'' var. ''bigeloviana'' (N)
*''Elymus hystrix'' var. ''hystrix'' (N)
**[[Elymus repens]]* (I)
**[[Elymus riparius]]* (N)
**[[Elymus submuticus]]* (N)
*''Elymus trachycaulus'' ssp. ''subsecundus'' (N)
*''Elymus trachycaulus'' ssp. ''trachycaulus'' (N)
**[[Elymus villosus]]* (N)
*''Elymus virginicus'' var. ''virginicus'' (N)
**[[Enemion biternatum]]* (N)
**[[Epifagus virginiana]]* (N)
**[[Epigaea repens]]* (N)
*''Epilobium ciliatum'' ssp. ''ciliatum'' (N)
*''Epilobium ciliatum'' ssp. ''glandulosum'' (N)
**[[Epilobium coloratum]]* (N)
**[[Epilobium hirsutum]]* (I)
**[[Epilobium leptophyllum]]* (N)
**[[Epilobium parviflorum]]* (I)
**[[Epilobium strictum]]* (N)
**[[Epilobium × wisconsinense]]* (N)
**[[Epipactis helleborine]]* (I)
**[[Equisetum arvense]]* (N)
**[[Equisetum × ferrissii]]* (N)
**[[Su atkuyruğu|Equisetum fluviatile]]* (N)
*''Equisetum hyemale'' var. ''affine'' (N)
**[[Equisetum laevigatum]]* (N)
**[[Equisetum × mackaii]]* (N)
**[[Equisetum × nelsonii]]* (N)
**[[Equisetum sylvaticum]]* (N)
*''Equisetum variegatum'' var. ''variegatum'' (N)
**[[Eragrostis capillaris]]* (N)
**[[Eragrostis cilianensis]]* (I)
**[[Eragrostis curvula]]* (I)
**[[Eragrostis frankii]]* (N)
**[[Eragrostis hirsuta]]* (N)
**[[Eragrostis hypnoides]]* (N)
**[[Eragrostis minor]]* (I)
*''Eragrostis pectinacea'' var. ''miserrima'' (N)
*''Eragrostis pectinacea'' var. ''pectinacea'' (N)
**[[Eragrostis pilosa]]* (N)
**[[Eragrostis spectabilis]]* (N)
**[[Eragrostis trichodes]]* (N)
**[[Eranthis hyemalis]]* (I)
*''Erechtites hieraciifolia'' var. ''hieraciifolia'' (N)
**[[Erica tetralix]]* (I)
**[[Erigenia bulbosa]]* (N)
**[[Erigeron annuus]]* (N)
*''Erigeron philadelphicus'' var. ''philadelphicus'' (N)
*''Erigeron pulchellus'' var. ''brauniae'' (N)
*''Erigeron pulchellus'' var. ''pulchellus'' (N)
*''Erigeron strigosus'' var. ''strigosus'' (N)
**[[Eriocaulon aquaticum]]* (N)
**[[Eriochloa contracta]]* (N)
*''Eriophorum gracile'' var. ''gracile'' (N)
**[[Eriophorum virginicum]]* (N)
**[[Eriophorum viridicarinatum]]* (N)
*''Erodium cicutarium'' ssp. ''cicutarium'' (I)
**[[Erucastrum gallicum]]* (I)
*''Eryngium yuccifolium'' var. ''yuccifolium'' (N)
*''Erysimum capitatum'' var. ''capitatum'' (N)
**[[Erysimum cheiranthoides]]* (I)
*''Erysimum inconspicuum'' var. ''inconspicuum'' (N)
**[[Erysimum repandum]]* (I)
**[[Erythronium albidum]]* (N)
*''Erythronium americanum'' ssp. ''americanum'' (N)
**[[Erythronium rostratum]]* (N)
*''Eschscholzia californica'' ssp. ''californica'' (N)
**[[Eubotrys recurva]]* (N)
*''Euonymus alatus'' var. ''alatus'' (I)
**[[Euonymus americanus]]* (N)
*''Euonymus atropurpureus'' var. ''atropurpureus'' (N)
**[[Euonymus europaeus]]* (I)
*''Euonymus fortunei'' var. ''radicans'' (I)
**[[Euonymus obovatus]]* (N)
**[[Eupatoriadelphus fistulosus]]* (N)
*''Eupatoriadelphus maculatus'' var. ''maculatus'' (N)
*''Eupatorium album'' var. ''album'' (N)
**[[Eupatorium altissimum]]* (N)
**Eupatorium godfreyanum* (N) (a hybrid of *[[Eupatorium rotundifolium]]* and *[[Eupatorium sessilifolium]]*)
*''Eupatorium hyssopifolium'' var. ''laciniatum'' (N)
*''Eupatorium perfoliatum'' var. ''perfoliatum'' (N)
*''Eupatorium purpureum'' var. ''purpureum'' (N)
*''Eupatorium rotundifolium'' var. ''ovatum'' (N)
*''Eupatorium rotundifolium'' var. ''rotundifolium'' (N)
**[[Eupatorium serotinum]]* (N)
*''Eupatorium sessilifolium'' var. ''sessilifolium'' (N)
**[[Euphorbia commutata]]* (N)
**[[Euphorbia corollata]]* (N)
**[[Euphorbia cyathophora]]* (N)
**[[Euphorbia cyparissias]]* (I)
**[[Euphorbia davidii]]* (I)
**[[Euphorbia dentata]]* (I)
*''Euphorbia dentata'' var. ''dentata'' (N)
*''Euphorbia esula'' var. ''esula'' (I)
**[[Euphorbia falcata]]* (I)
**[[Euphorbia helioscopia]]* (I)
**[[Euphorbia lathyris]]* (I)
**[[Euphorbia marginata]]* (N)
**[[Euphorbia peplus]]* (I)
**[[Euphorbia platyphyllos]]* (I)
**[[Euphorbia purpurea]]* (N)
**[[Euphorbia spathulata]]* (N)
**[[Eurybia divaricata]]* (N)
**[[Eurybia macrophylla]]* (N)
**[[Eurybia schreberi]]* (N)
**[[Eurybia surculosa]]* (N)
*''Euthamia graminifolia'' var. ''graminifolia'' (N)
**[[Euthamia gymnospermoides]]* (N)

## F
**[[Fagopyrum esculentum]]* (I)
**[[Fagus grandifolia]]* (N)
**[[Avrupa kayını|Fagus sylvatica]]* (I)
**[[Fatoua villosa]]* (I)
**[[Festuca brevipila]]* (I)
**[[Festuca filiformis]]* (I)
**[[Festuca rubra]]* (I)
*''Festuca rubra'' ssp. ''rubra'' (N)
**[[Festuca subverticillata]]* (N)
**[[Filago vulgaris]]* (I)
**[[Filipendula rubra]]* (N)
*''Filipendula ulmaria'' ssp. ''ulmaria'' (I)
**[[Fimbristylis autumnalis]]* (N)
**[[Fleischmannia incarnata]]* (N)
**[[Floerkea proserpinacoides]]* (N)
**[[Rezene|Foeniculum vulgare]]* (I)
*''Fontanesia phillyreoides'' ssp. ''fortunei'' (I)
**[[Altınçanak|Forsythia × intermedia]]* (I)
**[[Forsythia suspensa]]* (I)
*''Fragaria vesca'' ssp. ''americana'' (N)
*''Fragaria vesca'' ssp. ''vesca'' (N)
*''Fragaria virginiana'' ssp. ''grayana'' (N)
*''Fragaria virginiana'' ssp. ''virginiana'' (N)
**[[Barut ağacı|Frangula alnus]]* (I)
**[[Barut ağacı|Frangula alnus]]* (N)
**[[Frangula caroliniana]]* (N)
**[[Frasera caroliniensis]]* (N)
**[[Fraxinus americana]]* (N)
**[[Adi dişbudak|Fraxinus excelsior]]* (I)
**[[Fraxinus nigra]]* (N)
**[[Yeşil dişbudak|Fraxinus pennsylvanica]]* (N)
**[[Fraxinus profunda]]* (N)
**[[Fraxinus quadrangulata]]* (N)
*''Froelichia floridana'' var. ''campestris'' (N)
**[[Froelichia gracilis]]* (N)
*''Fumaria officinalis'' ssp. ''officinalis'' (I)

## G
*''Gaillardia pulchella'' var. ''pulchella'' (N)
**[[Galactia volubilis]]* (N)
**[[Galanthus elwesii]]* (I)
**[[Galanthus nivalis]]* (I)
**[[Galax urceolata]]* (N)
**[[Galearis spectabilis]]* (N)
**[[Galeopsis bifida]]* (I)
*''Galeopsis ladanum'' var. ''ladanum'' (I)
*''Galeopsis tetrahit'' var. ''tetrahit'' (I)
**[[Galinsoga parviflora]]* (I)
**[[Galinsoga quadriradiata]]* (I)
**[[Yoğurt otu|Galium aparine]]* (N)
**[[Galium asprellum]]* (N)
**[[Galium boreale]]* (N)
*''Galium circaezans'' var. ''hypomalacum'' (N)
**[[Galium concinnum]]* (N)
**[[Galium labradoricum]]* (N)
**[[Galium lanceolatum]]* (N)
**[[Galium mollugo]]* (I)
*''Galium obtusum'' ssp. ''obtusum'' (N)
**[[Galium odoratum]]* (I)
**[[Galium palustre]]* (N)
*''Galium pilosum'' var. ''pilosum'' (N)
**[[Galium tinctorium]]* (N)
*''Galium trifidum'' ssp. ''trifidum'' (N)
**[[Galium triflorum]]* (N)
*''Galium verum'' var. ''verum'' (I)
**[[Gamochaeta purpurea]]* (N)
**[[Gaultheria hispidula]]* (N)
**[[Gaultheria procumbens]]* (N)
**[[Gaura biennis]]* (N)
**[[Gaura longiflora]]* (N)
**[[Gaura mollis]]* (N)
**[[Gaylussacia baccata]]* (N)
**[[Genista tinctoria]]* (I)
**[[Gentiana alba]]* (N)
*''Gentiana andrewsii'' var. ''andrewsii'' (N)
**[[Gentiana × billingtonii]]* (N)
**[[Gentiana clausa]]* (N)
**[[Gentiana puberulenta]]* (N)
*''Gentiana saponaria'' var. ''saponaria'' (N)
**[[Gentiana villosa]]* (N)
*''Gentianella quinquefolia'' ssp. ''occidentalis'' (N)
**[[Gentianopsis crinita]]* (N)
*''Gentianopsis virgata'' ssp. ''victorinii'' (N)
*''Gentianopsis virgata'' ssp. ''virgata'' (N)
**[[Geranium bicknellii]]* (N)
*''Geranium carolinianum'' var. ''carolinianum'' (N)
**[[Geranium columbinum]]* (I)
**[[Geranium dissectum]]* (I)
**[[Geranium maculatum]]* (N)
**[[Geranium molle]]* (I)
**[[Geranium pusillum]]* (I)
**[[Geranium robertianum]]* (I)
*''Geranium robertianum'' ssp. ''robertianum'' (N)
**[[Geranium sanguineum]]* (I)
**[[Geum aleppicum]]* (N)
*''Geum canadense'' var. ''canadense'' (N)
*''Geum laciniatum'' var. ''laciniatum'' (N)
**[[Geum rivale]]* (N)
**[[Geum urbanum]]* (I)
**[[Geum vernum]]* (N)
**[[Geum virginianum]]* (N)
*''Gilia capitata'' ssp. ''capitata'' (N)
**[[Gillenia stipulata]]* (N)
**[[Gillenia trifoliata]]* (N)
**[[Gladiolus × gandavensis]]* (I)
**[[Glandularia canadensis]]* (N)
**[[Glandularia × hybrida]]* (I)
**[[Glebionis segetum]]* (I)
**[[Glechoma hederacea]]* (I)
**[[Gleditsia triacanthos]]* (N)
**[[Glyceria acutiflora]]* (N)
**[[Glyceria borealis]]* (N)
**[[Glyceria canadensis]]* (N)
*''Glyceria grandis'' var. ''grandis'' (N)
**[[Glyceria melicaria]]* (N)
**[[Glyceria septentrionalis]]* (N)
**[[Glyceria striata]]* (N)
**[[Soya|Glycine max]]* (I)
**[[Gnaphalium uliginosum]]* (I)
**[[Gomphrena globosa]]* (I)
**[[Goodyera pubescens]]* (N)
**[[Goodyera repens]]* (N)
**[[Goodyera tesselata]]* (N)
**[[Gratiola neglecta]]* (N)
*''Gratiola virginiana'' var. ''virginiana'' (N)
**[[Gratiola viscidula]]* (N)
*''Grindelia lanceolata'' var. ''lanceolata'' (N)
*''Grindelia squarrosa'' var. ''serrulata'' (N)
*''Grindelia squarrosa'' var. ''squarrosa'' (N)
**[[Guizotia abyssinica]]* (I)
*''Gutierrezia texana'' var. ''texana'' (N)
**[[Gymnocarpium appalachianum]]* (N)
**[[Gymnocarpium × brittonianum]]* (N)
**[[Gymnocarpium dryopteris]]* (N)
**[[Gymnocladus dioicus]]* (N)
**[[Gymnopogon ambiguus]]* (N)
**[[Gypsophila paniculata]]* (I)
**[[Gypsophila scorzonerifolia]]* (I)

## H
*''Hackelia deflexa'' var. ''americana'' (N)
**[[Hackelia virginiana]]* (N)
*''Halesia tetraptera'' var. ''tetraptera'' (N)
**[[Hamamelis virginiana]]* (N)
**[[Hasteola suaveolens]]* (N)
**[[Hedeoma hispida]]* (N)
**[[Hedeoma pulegioides]]* (N)
**[[Hedera helix]]* (I)
*''Helenium amarum'' var. ''amarum'' (N)
*''Helenium autumnale'' var. ''autumnale'' (N)
**[[Helenium flexuosum]]* (N)
**[[Helianthemum bicknellii]]* (N)
**[[Helianthemum canadense]]* (N)
**[[Helianthus × ambiguus]]* (N)
**[[Helianthus angustifolius]]* (N)
**[[Ayçiçeği|Helianthus annuus]]* (N)
**[[Helianthus × brevifolius]]* (N)
**[[Helianthus × cinereus]]* (N)
**[[Helianthus decapetalus]]* (N)
**[[Helianthus divaricatus]]* (N)
**[[Helianthus × divariserratus]]* (N)
**[[Helianthus × doronicoides]]* (N)
**[[Helianthus giganteus]]* (N)
**[[Helianthus × glaucus]]* (N)
**[[Helianthus grosseserratus]]* (N)
**[[Helianthus hirsutus]]* (N)
**[[Helianthus × intermedius]]* (N)
**[[Helianthus × kellermanii]]* (N)
**[[Helianthus × laetiflorus]]* (N)
**[[Helianthus × luxurians]]* (N)
**[[Helianthus maximiliani]]* (N)
**[[Helianthus microcephalus]]* (N)
**[[Helianthus mollis]]* (N)
**[[Helianthus × multiflorus]]* (N)
*''Helianthus occidentalis'' ssp. ''occidentalis'' (N)
*''Helianthus petiolaris'' ssp. ''petiolaris'' (N)
**[[Helianthus salicifolius]]* (N)
**[[Helianthus strumosus]]* (N)
**[[Helianthus tuberosus]]* (N)
*''Heliopsis helianthoides'' var. ''helianthoides'' (N)
*''Heliopsis helianthoides'' var. ''occidentalis'' (N)
**[[Heliotropium europaeum]]* (I)
**[[Heliotropium indicum]]* (I)
**[[Helleborus viridis]]* (I)
**[[Turuncu güngüzeli|Hemerocallis fulva]]* (I)
**[[Hemerocallis lilioasphodelus]]* (I)
*''Hepatica nobilis'' var. ''acuta'' (N)
*''Hepatica nobilis'' var. ''obtusa'' (N)
**[[Heracleum maximum]]* (N)
**[[Hesperis matronalis]]* (I)
**[[Hesperostipa spartea]]* (N)
**[[Heteranthera dubia]]* (N)
**[[Heteranthera reniformis]]* (N)
*''Heterotheca camporum'' var. ''camporum'' (N)
*''Heuchera americana'' var. ''americana'' (N)
*''Heuchera americana'' var. ''hirsuticaulis'' (N)
*''Heuchera americana'' var. ''hispida'' (N)
**[[Heuchera longiflora]]* (N)
*''Heuchera parviflora'' var. ''parviflora'' (N)
*''Heuchera villosa'' var. ''villosa'' (N)
*''Hexalectris spicata'' var. ''spicata'' (N)
**[[Hibiscus laevis]]* (N)
**[[Hibiscus moscheutos]]* (N)
**[[Ağaçhatmi|Hibiscus syriacus]]* (I)
**[[Hibiscus trionum]]* (I)
**[[Turuncu şahin otu|Hieracium aurantiacum]]* (I)
**[[Hieracium caespitosum]]* (I)
*''Hieracium × flagellare'' var. ''flagellare'' (I)
**[[Hieracium × floribundum]]* (I)
**[[Hieracium greenii]]* (N)
**[[Hieracium gronovii]]* (N)
*''Hieracium kalmii'' var. ''fasciculatum'' (N)
*''Hieracium kalmii'' var. ''kalmii'' (N)
**[[Hieracium longipilum]]* (N)
**[[Hieracium paniculatum]]* (N)
*''Hieracium pilosella'' var. ''pilosella'' (I)
**[[Hieracium piloselloides]]* (I)
*''Hieracium scabrum'' var. ''scabrum'' (N)
**[[Hieracium venosum]]* (N)
*''Hierochloe hirta'' ssp. ''arctica'' (N)
**[[Holcus lanatus]]* (I)
**[[Holosteum umbellatum]]* (I)
*''Hordeum brachyantherum'' ssp. ''brachyantherum'' (N)
*''Hordeum jubatum'' ssp. ''jubatum'' (N)
*''Hordeum marinum'' ssp. ''gussonianum'' (I)
**[[Hordeum pusillum]]* (N)
**[[Hordeum vulgare]]* (I)
**[[Hosta lancifolia]]* (I)
**[[Hosta ventricosa]]* (I)
**[[Hottonia inflata]]* (N)
**[[Houstonia caerulea]]* (N)
**[[Houstonia canadensis]]* (N)
**[[Houstonia longifolia]]* (N)
*''Houstonia purpurea'' var. ''calycosa'' (N)
*''Houstonia purpurea'' var. ''purpurea'' (N)
*''Hudsonia tomentosa'' var. ''tomentosa'' (N)
**[[Humulus japonicus]]* (I)
*''Humulus lupulus'' var. ''lupuloides'' (N)
*''Humulus lupulus'' var. ''pubescens'' (N)
*''Humulus lupulus'' var. ''lupulus'' (I)
**[[Huperzia × bartleyi]]* (N)
**[[Huperzia × buttersii]]* (N)
**[[Huperzia lucidula]]* (N)
**[[Huperzia porophila]]* (N)
**[[Hyacinthoides non-scripta]]* (I)
**[[Hybanthus concolor]]* (N)
**[[Hydrangea arborescens]]* (N)
**[[Altınmühür|Hydrastis canadensis]]* (N)
**[[Hydrocotyle americana]]* (N)
**[[Hydrocotyle ranunculoides]]* (N)
**[[Hydrocotyle sibthorpioides]]* (I)
**[[Hydrocotyle umbellata]]* (N)
**[[Hydrophyllum appendiculatum]]* (N)
**[[Hydrophyllum canadense]]* (N)
**[[Hydrophyllum macrophyllum]]* (N)
*''Hydrophyllum virginianum'' var. ''virginianum'' (N)
**[[Hylotelephium telephioides]]* (N)
*''Hylotelephium telephium'' ssp. ''telephium'' (I)
**[[Hypericum ascyron]]* (N)
**[[Hypericum boreale]]* (N)
**[[Hypericum canadense]]* (N)
**[[Hypericum drummondii]]* (N)
**[[Hypericum ellipticum]]* (N)
**[[Hypericum gentianoides]]* (N)
**[[Hypericum gymnanthum]]* (N)
*''Hypericum hypericoides'' ssp. ''multicaule'' (N)
**[[Hypericum kalmianum]]* (N)
**[[Hypericum majus]]* (N)
**[[Hypericum mutilum]]* (N)
**[[Sarı kantaron|Hypericum perforatum]]* (I)
**[[Hypericum prolificum]]* (N)
**[[Hypericum punctatum]]* (N)
**[[Hypericum sphaerocarpum]]* (N)
**[[Hypericum virgatum]]* (N)
**[[Hypochaeris glabra]]* (I)
**[[Hypochaeris radicata]]* (I)
**[[Hypoxis hirsuta]]* (N)

## I
**[[Iberis umbellata]]* (I)
**[[Ilex crenata]]* (I)
**[[Ilex mucronata]]* (N)
*''Ilex opaca'' var. ''opaca'' (N)
**[[Ilex verticillata]]* (N)
**[[Impatiens balsamina]]* (I)
**[[Impatiens capensis]]* (N)
**[[Impatiens pallida]]* (N)
**[[Inula helenium]]* (I)
**[[Iodanthus pinnatifidus]]* (N)
**[[Ionactis linariifolius]]* (N)
**[[Ipomoea coccinea]]* (I)
**[[Ipomoea hederacea]]* (I)
**[[Ipomoea lacunosa]]* (N)
**[[Ipomoea pandurata]]* (N)
**[[Ipomoea purpurea]]* (I)
**[[Ipomopsis rubra]]* (N)
**[[Iris brevicaulis]]* (N)
**[[Iris cristata]]* (N)
**[[Iris fulva]]* (N)
**[[Iris germanica]]* (I)
**[[Iris pseudacorus]]* (I)
*''Iris verna'' var. ''smalliana'' (N)
**[[Iris versicolor]]* (N)
*''Iris virginica'' var. ''shrevei'' (N)
**[[Isoetes appalachiana]]* (N)
**[[Isoetes engelmannii]]* (N)
**[[Isoetes tenella]]* (N)
**[[Isotria medeoloides]]* (N)
**[[Isotria verticillata]]* (N)
*''Iva annua'' var. ''annua'' (N)

## J
**[[Jacquemontia tamnifolia]]* (N)
**[[Jeffersonia diphylla]]* (N)
**[[Juglans cinerea]]* (N)
**[[Juglans nigra]]* (N)
**[[Juncus acuminatus]]* (N)
*''Juncus alpinoarticulatus'' ssp. ''nodulosus'' (N)
**[[Juncus anthelatus]]* (N)
*''Juncus arcticus'' ssp. ''littoralis'' (N)
**[[Juncus articulatus]]* (N)
**[[Juncus biflorus]]* (N)
**[[Juncus brachycarpus]]* (N)
**[[Juncus brachycephalus]]* (N)
*''Juncus bufonius'' var. ''bufonius'' (N)
**[[Juncus canadensis]]* (N)
**[[Juncus compressus]]* (I)
**[[Juncus dichotomus]]* (N)
**[[Juncus diffusissimus]]* (N)
**[[Juncus dudleyi]]* (N)
*''Juncus effusus'' var. ''decipiens'' (N)
*''Juncus effusus'' var. ''pylaei'' (N)
*''Juncus effusus'' var. ''solutus'' (N)
*''Juncus gerardii'' var. ''gerardii'' (N)
**[[Juncus greenei]]* (N)
*''Juncus interior'' var. ''interior'' (N)
**[[Juncus marginatus]]* (N)
*''Juncus nodosus'' var. ''nodosus'' (N)
**[[Juncus secundus]]* (N)
**[[Juncus × stuckeyi]]* (N)
*''Juncus subcaudatus'' var. ''subcaudatus'' (N)
**[[Juncus tenuis]]* (N)
**[[Juncus torreyi]]* (N)
*''Juniperus communis'' var. ''depressa'' (N)
*''Juniperus virginiana'' var. ''virginiana'' (N)
**[[Justicia americana]]* (N)

## K
**[[Kalmia latifolia]]* (N)
**[[Kerria japonica]]* (I)
**[[Kickxia elatine]]* (I)
**[[Kickxia spuria]]* (I)
**[[Koeleria macrantha]]* (N)
**[[Koelreuteria paniculata]]* (I)
*''Krigia biflora'' var. ''biflora'' (N)
**[[Krigia dandelion]]* (N)
**[[Krigia virginica]]* (N)
**[[Kummerowia stipulacea]]* (I)
**[[Kummerowia striata]]* (I)
**[[Kyllinga pumila]]* (N)

## L
**[[Lablab purpureus]]* (I)
**[[Lactuca biennis]]* (N)
**[[Lactuca canadensis]]* (N)
*''Lactuca floridana'' var. ''floridana'' (N)
*''Lactuca floridana'' var. ''villosa'' (N)
*''Lactuca hirsuta'' var. ''sanguinea'' (N)
**[[Lactuca × morssii]]* (N)
**[[Lactuca saligna]]* (I)
**[[Lactuca sativa]]* (I)
**[[Lactuca serriola]]* (I)
*''Lactuca tatarica'' var. ''pulchella'' (N)
**[[Lamium album]]* (I)
**[[Lamium amplexicaule]]* (I)
**[[Lamium maculatum]]* (I)
*''Lamium purpureum'' var. ''purpureum'' (I)
**[[Laportea canadensis]]* (N)
**[[Lappula squarrosa]]* (I)
**[[Meme otu|Lapsana communis]]* (I)
**[[Larix laricina]]* (N)
*''Lathyrus japonicus'' var. ''maritimus'' (N)
*''Lathyrus japonicus'' var. ''parviflorus'' (N)
**[[Lathyrus latifolius]]* (I)
**[[Lathyrus ochroleucus]]* (N)
**[[Lathyrus odoratus]]* (I)
**[[Lathyrus palustris]]* (N)
**[[Lathyrus pratensis]]* (I)
**[[Lathyrus tuberosus]]* (I)
**[[Lathyrus venosus]]* (N)
**[[Leavenworthia uniflora]]* (N)
*''Lechea intermedia'' var. ''intermedia'' (N)
**[[Lechea minor]]* (N)
**[[Lechea mucronata]]* (N)
*''Lechea pulchella'' var. ''moniliformis'' (N)
*''Lechea pulchella'' var. ''pulchella'' (N)
**[[Lechea racemulosa]]* (N)
**[[Lechea tenuifolia]]* (N)
**[[Rhododendron groenlandicum|Ledum groenlandicum]]* (N)
**[[Leersia lenticularis]]* (N)
**[[Leersia oryzoides]]* (N)
**[[Leersia virginica]]* (N)
**[[Su mercimeği|Lemna minor]]* (N)
**[[Lemna minuta]]* (N)
**[[Lemna obscura]]* (N)
**[[Lemna perpusilla]]* (N)
**[[Lemna trisulca]]* (N)
**[[Lemna turionifera]]* (N)
**[[Lemna valdiviana]]* (N)
*''Leontodon autumnalis'' ssp. ''autumnalis'' (I)
*''Leontodon autumnalis'' ssp. ''pratensis'' (I)
*''Leontodon hispidus'' ssp. ''danubialis'' (I)
*''Leontodon taraxacoides'' ssp. ''taraxacoides'' (I)
*''Leonurus cardiaca'' ssp. ''cardiaca'' (I)
**[[Leonurus sibiricus]]* (I)
**[[Lepidium campestre]]* (I)
*''Lepidium densiflorum'' var. ''densiflorum'' (N)
**[[Lepidium perfoliatum]]* (I)
*''Lepidium ramosissimum'' var. ''bourgeauanum'' (N)
**[[Lepidium ruderale]]* (I)
**[[Tere|Lepidium sativum]]* (I)
*''Lepidium virginicum'' var. ''virginicum'' (N)
*''Leptochloa fusca'' ssp. ''fascicularis'' (N)
*''Leptochloa panicea'' ssp. ''brachiata'' (N)
**[[Lespedeza × acuticarpa]]* (N)
**[[Lespedeza bicolor]]* (I)
**[[Lespedeza × brittonii]]* (N)
**[[Lespedeza capitata]]* (N)
**[[Lespedeza cuneata]]* (I)
**[[Lespedeza formosa]]* (I)
**[[Lespedeza frutescens]]* (N)
*''Lespedeza hirta'' ssp. ''hirta'' (N)
**[[Lespedeza × nuttallii]]* (N)
**[[Lespedeza procumbens]]* (N)
**[[Lespedeza repens]]* (N)
**[[Lespedeza thunbergii]]* (I)
**[[Lespedeza violacea]]* (N)
**[[Lespedeza virginica]]* (N)
**[[Lesquerella globosa]]* (N)
**[[Leucanthemum maximum]]* (I)
**[[Beyaz ay papatyası|Leucanthemum vulgare]]* (I)
*''Leucojum aestivum'' ssp. ''aestivum'' (I)
**[[Leucospora multifida]]* (N)
**[[Levisticum officinale]]* (I)
*''Liatris aspera'' var. ''aspera'' (N)
*''Liatris aspera'' var. ''intermedia'' (N)
**[[Liatris cylindracea]]* (N)
*''Liatris punctata'' var. ''punctata'' (N)
*''Liatris pycnostachya'' var. ''pycnostachya'' (N)
*''Liatris scariosa'' var. ''nieuwlandii'' (N)
**[[Liatris spheroidea]]* (N)
*''Liatris spicata'' var. ''spicata'' (N)
*''Liatris squarrosa'' var. ''squarrosa'' (N)
**[[Liatris squarrulosa]]* (N)
**[[Ligusticum canadense]]* (N)
**[[Ligustrum obtusifolium]]* (I)
**[[Ligustrum ovalifolium]]* (I)
**[[Ligustrum vulgare]]* (I)
*''Lilium canadense'' ssp. ''canadense'' (N)
*''Lilium canadense'' ssp. ''editorum'' (N)
**[[Lilium lancifolium]]* (I)
**[[Lilium michiganense]]* (N)
*''Lilium philadelphicum'' var. ''andinum'' (N)
*''Lilium philadelphicum'' var. ''philadelphicum'' (N)
**[[Lilium superbum]]* (N)
*''Linaria dalmatica'' ssp. ''dalmatica'' (I)
**[[Linaria genistifolia]]* (I)
**[[Linaria vulgaris]]* (I)
*''Lindera benzoin'' var. ''benzoin'' (N)
*''Lindera benzoin'' var. ''pubescens'' (N)
*''Lindernia dubia'' var. ''anagallidea'' (N)
*''Lindernia dubia'' var. ''dubia'' (N)
*''Linnaea borealis'' ssp. ''americana'' (N)
**[[Linum grandiflorum]]* (I)
*''Linum medium'' var. ''texanum'' (N)
**[[Linum perenne]]* (I)
**[[Linum perenne]]* (N)
**[[Linum striatum]]* (N)
*''Linum sulcatum'' var. ''sulcatum'' (N)
**[[Keten|Linum usitatissimum]]* (I)
**[[Linum virginianum]]* (N)
**[[Liparis liliifolia]]* (N)
**[[Liparis loeselii]]* (N)
**[[Lipocarpha drummondii]]* (N)
**[[Lipocarpha micrantha]]* (N)
**[[Liquidambar styraciflua]]* (N)
**[[Liriodendron tulipifera]]* (N)
**[[Lithospermum canescens]]* (N)
*''Lithospermum caroliniense'' var. ''croceum'' (N)
**[[Lithospermum latifolium]]* (N)
**[[Lithospermum officinale]]* (I)
**[[Lobelia cardinalis]]* (N)
**[[Lobelia inflata]]* (N)
**[[Lobelia kalmii]]* (N)
*''Lobelia puberula'' var. ''simulans'' (N)
*''Lobelia siphilitica'' var. ''siphilitica'' (N)
*''Lobelia spicata'' var. ''campanulata'' (N)
*''Lobelia spicata'' var. ''leptostachys'' (N)
*''Lobelia spicata'' var. ''spicata'' (N)
**[[Lobularia maritima]]* (I)
**[[Lorinseria areolata]]* (N)
*''Lolium perenne'' ssp. ''multiflorum'' (I)
*''Lolium perenne'' ssp. ''perenne'' (I)
*''Lolium temulentum'' ssp. ''temulentum'' (I)
*''Lonicera'' × ''bella'' (I)
**[[Lonicera canadensis]]* (N)
**[[Lonicera dioica]]* (N)
**[[Lonicera flava]]* (N)
**[[Lonicera fragrantissima]]* (I)
**[[Lonicera japonica]]* (I)
**[[Lonicera × minutiflora]]* (I)
**[[Lonicera morrowii]]* (I)
**[[Lonicera maackii]]* (I)
**[[Lonicera oblongifolia]]* (N)
**[[Lonicera reticulata]]* (N)
**[[Lonicera ruprechtiana]]* (I)
**[[Lonicera × salicifolia]]* (I)
**[[Lonicera sempervirens]]* (N)
**[[Lonicera tatarica]]* (I)
*''Lonicera villosa'' var. ''tonsa'' (N)
**[[Lonicera × xylosteoides]]* (I)
**[[Lonicera xylosteum]]* (I)
*''Lotus corniculatus'' var. ''corniculatus'' (I)
**[[Lotus glaber]]* (I)
**[[Ludwigia alternifolia]]* (N)
**[[Ludwigia decurrens]]* (N)
**[[Ludwigia leptocarpa]]* (N)
**[[Ludwigia palustris]]* (N)
**[[Ludwigia peploides]]* (I)
*''Ludwigia peploides'' ssp. ''glabrescens'' (N)
**[[Ludwigia polycarpa]]* (N)
**[[Lunaria annua]]* (I)
*''Lupinus perennis'' ssp. ''perennis'' var. ''occidentalis'' (N)
*''Lupinus perennis'' ssp. ''perennis'' var. ''perennis'' (N)
*''Lupinus perennis'' ssp. ''perennis'' (N)
*''Luzula acuminata'' ssp. ''acuminata'' (N)
*''Luzula acuminata'' ssp. ''carolinae'' (N)
**[[Luzula bulbosa]]* (N)
**[[Luzula echinata]]* (N)
*''Luzula multiflora'' ssp. ''multiflora'' var. ''multiflora'' (N)
*''Luzula multiflora'' ssp. ''multiflora'' (N)
**[[Lychnis coronaria]]* (I)
**[[Lychnis flos-cuculi]]* (I)
**[[Lychnis viscaria]]* (I)
**[[Lycium barbarum]]* (I)
**[[Lycium chinense]]* (I)
**[[Lycopodiella inundata]]* (N)
**[[Lycopodiella margueritiae]]* (N)
**[[Lycopodiella subappressa]]* (N)
**[[Lycopodium clavatum]]* (N)
**[[Lycopodium dendroideum]]* (N)
**[[Lycopodium digitatum]]* (N)
**[[Lycopodium × habereri]]* (N)
**[[Lycopodium hickeyi]]* (N)
**[[Lycopodium lagopus]]* (N)
**[[Lycopodium obscurum]]* (N)
**[[Lycopodium tristachyum]]* (N)
**[[Lycopus americanus]]* (N)
**[[Lycopus asper]]* (N)
**[[Lycopus europaeus]]* (I)
**[[Lycopus rubellus]]* (N)
**[[Lycopus × sherardii]]* (N)
*''Lycopus uniflorus'' var. ''uniflorus'' (N)
**[[Lycopus virginicus]]* (N)
**[[Lycoris squamigera]]* (I)
**[[Lygodium palmatum]]* (N)
*''Lyonia ligustrina'' var. ''ligustrina'' (N)
**[[Lysimachia ciliata]]* (N)
**[[Lysimachia lanceolata]]* (N)
**[[Lysimachia nummularia]]* (I)
**[[Lysimachia × producta]]* (N)
**[[Lysimachia punctata]]* (I)
**[[Lysimachia quadriflora]]* (N)
**[[Lysimachia quadrifolia]]* (N)
**[[Lysimachia terrestris]]* (N)
**[[Lysimachia thyrsiflora]]* (N)
**[[Lysimachia vulgaris]]* (I)
*''Lythrum alatum'' var. ''alatum'' (N)
**[[Lythrum hyssopifolia]]* (I)
**[[Lythrum portula]]* (I)
**[[Lythrum salicaria]]* (I)

## M
**[[Macleaya cordata]]* (I)
**[[Maclura pomifera]]* (N)
**[[Magnolia acuminata]]* (N)
**[[Magnolia fraseri]]* (N)
**[[Magnolia macrophylla]]* (N)
**[[Magnolia × soulangeana]]* (I)
**[[Magnolia stellata]]* (I)
**[[Magnolia tripetala]]* (N)
**[[Mahonia aquifolium]]* (N)
**[[Maianthemum canadense]]* (N)
*''Maianthemum racemosum'' ssp. ''racemosum'' (N)
**[[Maianthemum stellatum]]* (N)
**[[Maianthemum trifolium]]* (N)
**[[Malaxis unifolia]]* (N)
*''Malus angustifolia'' var. ''angustifolia'' (N)
**[[Malus baccata]]* (I)
**[[Malus coronaria]]* (N)
**[[Malus floribunda]]* (I)
*''Malus ioensis'' var. ''ioensis'' (N)
**[[Malus × platycarpa]]* (N)
**[[Malus pumila]]* (I)
**[[Malus toringo]]* (I)
**[[Malus zumi]]* (I)
**[[Malva alcea]]* (I)
**[[Malva moschata]]* (I)
**[[Malva neglecta]]* (I)
**[[Malva pusilla]]* (I)
**[[Büyük ebegümeci|Malva sylvestris]]* (I)
**[[Malva verticillata]]* (I)
**[[Manfreda virginica]]* (N)
**[[Marrubium vulgare]]* (I)
**[[Marsilea quadrifolia]]* (I)
**[[Marsilea quadrifolia]]* (N)
**[[Matelea obliqua]]* (N)
**[[Matricaria discoidea]]* (I)
**[[Matricaria recutita]]* (I)
**[[Matteuccia struthiopteris]]* (N)
**[[Mazus pumilus]]* (I)
**[[Medeola virginiana]]* (N)
**[[Medicago lupulina]]* (I)
**[[Medicago polymorpha]]* (I)
*''Medicago sativa'' ssp. ''falcata'' (I)
*''Medicago sativa'' ssp. ''sativa'' (I)
**[[Meehania cordata]]* (N)
*''Melampyrum lineare'' var. ''latifolium'' (N)
*''Melampyrum lineare'' var. ''lineare'' (N)
**[[Melica nitens]]* (N)
**[[Melilotus altissimus]]* (I)
**[[Melilotus officinalis]]* (I)
**[[Melissa officinalis]]* (I)
**[[Menispermum canadense]]* (N)
**[[Mentha aquatica]]* (I)
**[[Mentha arvensis]]* (N)
**[[Mentha × gracilis]]* (I)
**[[Mentha × piperita]]* (N)
**[[Mentha × rotundifolia]]* (I)
**[[Mentha spicata]]* (I)
**[[Mentha suaveolens]]* (I)
**[[Mentha × villosa]]* (I)
**[[Su yoncası|Menyanthes trifoliata]]* (N)
**[[Mercurialis annua]]* (I)
**[[Mertensia virginica]]* (N)
**[[Microstegium vimineum]]* (I)
**[[Microthlaspi perfoliatum]]* (I)
**[[Mikania scandens]]* (N)
*''Milium effusum'' var. ''cisatlanticum'' (N)
**[[Mimulus alatus]]* (N)
*''Mimulus ringens'' var. ''ringens'' (N)
*''Minuartia michauxii'' var. ''michauxii'' (N)
**[[Minuartia patula]]* (N)
**[[Mirabilis albida]]* (N)
**[[Mirabilis hirsuta]]* (N)
**[[Akşamsefası|Mirabilis jalapa]]* (I)
**[[Mirabilis nyctaginea]]* (N)
**[[Miscanthus sinensis]]* (I)
**[[Misopates orontium]]* (I)
**[[Mitchella repens]]* (N)
**[[Mitella diphylla]]* (N)
**[[Moehringia lateriflora]]* (N)
**[[Moehringia trinervia]]* (I)
**[[Mollugo verticillata]]* (N)
**[[Monarda clinopodia]]* (N)
**[[Monarda didyma]]* (N)
*''Monarda fistulosa'' ssp. ''fistulosa'' var. ''fistulosa'' (N)
*''Monarda fistulosa'' ssp. ''fistulosa'' var. ''mollis'' (N)
*''Monarda fistulosa'' ssp. ''fistulosa'' (N)
**[[Monarda media]]* (N)
*''Monarda punctata'' ssp. ''punctata'' var. ''villicaulis'' (N)
*''Monarda punctata'' ssp. ''punctata'' (N)
**[[Moneses uniflora]]* (N)
**[[Monolepis nuttalliana]]* (N)
**[[Monotropa hypopithys]]* (N)
**[[Monotropa uniflora]]* (N)
**[[Morella pensylvanica]]* (N)
**[[Beyaz dut|Morus alba]]* (I)
**[[Morus nigra]]* (I)
*''Morus rubra'' var. ''rubra'' (N)
**[[Muhlenbergia asperifolia]]* (N)
**[[Muhlenbergia capillaris]]* (N)
**[[Muhlenbergia × curtisetosa]]* (N)
**[[Muhlenbergia cuspidata]]* (N)
**[[Muhlenbergia frondosa]]* (N)
**[[Muhlenbergia glomerata]]* (N)
**[[Muhlenbergia mexicana]]* (N)
**[[Muhlenbergia schreberi]]* (N)
**[[Muhlenbergia sobolifera]]* (N)
**[[Muhlenbergia sylvatica]]* (N)
**[[Muhlenbergia tenuiflora]]* (N)
**[[Muscari armeniacum]]* (I)
**[[Muscari botryoides]]* (I)
**[[Leopoldia comosa|Muscari comosum]]* (I)
**[[Muscari neglectum]]* (I)
**[[Myagrum perfoliatum]]* (I)
**[[Myosotis arvensis]]* (I)
**[[Myosotis discolor]]* (I)
**[[Myosotis laxa]]* (N)
**[[Myosotis macrosperma]]* (N)
**[[Myosotis scorpioides]]* (I)
**[[Myosotis stricta]]* (I)
**[[Myosotis sylvatica]]* (I)
**[[Myosotis verna]]* (N)
**[[Myosoton aquaticum]]* (I)
**[[Myosurus minimus]]* (N)
**[[Myriophyllum aquaticum]]* (I)
**[[Myriophyllum heterophyllum]]* (N)
**[[Myriophyllum humile]]* (N)
**[[Myriophyllum pinnatum]]* (N)
**[[Myriophyllum sibiricum]]* (N)
**[[Myriophyllum spicatum]]* (I)
**[[Myriophyllum verticillatum]]* (N)

## N
**[[Najas flexilis]]* (N)
**[[Najas gracillima]]* (N)
*''Najas guadalupensis'' ssp. ''guadalupensis'' (N)
**[[Najas marina]]* (N)
**[[Najas minor]]* (I)
**[[Napaea dioica]]* (N)
**[[Narcissus × incomparabilis]]* (I)
**[[Fulya (bitki)|Narcissus jonquilla]]* (I)
**[[Narcissus × medioluteus]]* (I)
**[[Narcissus poeticus]]* (I)
**[[Yabani nergis|Narcissus pseudonarcissus]]* (I)
**[[Nasturtium officinale]]* (I)
*''Navarretia intertexta'' ssp. ''propinqua'' (N)
**[[Nelumbo lutea]]* (N)
**[[Hint lotusu|Nelumbo nucifera]]* (I)
**[[Neobeckia aquatica]]* (N)
*''Neottia cordata'' var. ''cordata'' (N)
**[[Nepeta cataria]]* (I)
**[[Neslia paniculata]]* (I)
**[[Nicandra physalodes]]* (I)
**[[Nicotiana alata]]* (I)
**[[Nicotiana glauca]]* (I)
**[[Nicotiana rustica]]* (I)
**[[Nicotiana tabacum]]* (I)
**[[Nigella damascena]]* (I)
**[[Nothoscordum bivalve]]* (N)
*''Nuphar lutea'' ssp. ''advena'' (N)
*''Nuphar lutea'' ssp. ''variegata'' (N)
**[[Nuttallanthus canadensis]]* (N)
*''Nymphaea odorata'' ssp. ''odorata'' (N)
*''Nymphaea odorata'' ssp. ''tuberosa'' (N)
**[[Nymphoides peltata]]* (I)
**[[Nyssa sylvatica]]* (N)

## O
**[[Obolaria virginica]]* (N)
**[[Oclemena acuminata]]* (N)
**[[Oenanthe aquatica]]* (I)
**[[Oenothera biennis]]* (N)
**[[Oenothera clelandii]]* (N)
*''Oenothera fruticosa'' ssp. ''fruticosa'' (N)
*''Oenothera fruticosa'' ssp. ''glauca'' (N)
**[[Oenothera laciniata]]* (N)
**[[Oenothera nutans]]* (N)
**[[Oenothera oakesiana]]* (N)
**[[Oenothera parviflora]]* (N)
**[[Oenothera perennis]]* (N)
*''Oenothera pilosella'' ssp. ''pilosella'' (N)
**[[Oenothera speciosa]]* (N)
**[[Oenothera triloba]]* (N)
*''Oenothera villosa'' ssp. ''villosa'' (N)
**[[Oligoneuron album]]* (N)
**[[Oligoneuron ohioense]]* (N)
**[[Oligoneuron riddellii]]* (N)
*''Oligoneuron rigidum'' var. ''glabratum'' (N)
*''Oligoneuron rigidum'' var. ''rigidum'' (N)
**[[Onoclea sensibilis]]* (N)
**[[Onopordum acanthium]]* (I)
*''Onosmodium bejariense'' var. ''hispidissimum'' (N)
**[[Ophioglossum engelmannii]]* (N)
**[[Ophioglossum pusillum]]* (N)
**[[Ophioglossum vulgatum]]* (N)
**[[Opuntia humifusa]]* (N)
*''Opuntia macrorhiza'' var. ''macrorhiza'' (N)
**[[Orbexilum onobrychis]]* (N)
*''Orbexilum pedunculatum'' var. ''pedunculatum'' (N)
**[[Origanum vulgare]]* (I)
**[[Ornithogalum nutans]]* (I)
**[[Ornithogalum umbellatum]]* (I)
*''Orobanche ludoviciana'' ssp. ''ludoviciana'' (N)
**[[Orobanche uniflora]]* (N)
**[[Orthilia secunda]]* (N)
**[[Oryzopsis asperifolia]]* (N)
**[[Osmorhiza claytonii]]* (N)
**[[Osmorhiza longistylis]]* (N)
*''Osmunda cinnamomea'' var. ''cinnamomea'' (N)
**[[Osmunda claytoniana]]* (N)
*''Osmunda regalis'' var. ''spectabilis'' (N)
*''Ostrya virginiana'' var. ''virginiana'' (N)
**[[Oxalis corniculata]]* (N)
**[[Oxalis dillenii]]* (N)
**[[Oxalis grandis]]* (N)
**[[Oxalis montana]]* (N)
**[[Oxalis stricta]]* (N)
**[[Oxalis violacea]]* (N)
**[[Oxydendrum arboreum]]* (N)
**[[Oxypolis rigidior]]* (N)

## P
**[[Pachysandra terminalis]]* (I)
**[[Packera anonyma]]* (N)
**[[Packera aurea]]* (N)
**[[Packera glabella]]* (N)
**[[Packera obovata]]* (N)
**[[Packera paupercula]]* (N)
**[[Packera plattensis]]* (N)
**[[Panax quinquefolius]]* (N)
**[[Panax trifolius]]* (N)
**[[Panicum anceps]]* (N)
**[[Panicum capillare]]* (N)
*''Panicum dichotomiflorum'' var. ''dichotomiflorum'' (N)
**[[Panicum flexile]]* (N)
**[[Panicum gattingeri]]* (N)
*''Panicum miliaceum'' ssp. ''miliaceum'' (I)
**[[Panicum philadelphicum]]* (N)
*''Panicum rigidulum'' var. ''elongatum'' (N)
*''Panicum rigidulum'' var. ''pubescens'' (N)
*''Panicum rigidulum'' var. ''rigidulum'' (N)
**[[Panicum verrucosum]]* (N)
*''Panicum virgatum'' var. ''virgatum'' (N)
**[[Papaver argemone]]* (I)
**[[Papaver dubium]]* (I)
**[[Gelincik (bitki)|Papaver rhoeas]]* (I)
**[[Haşhaş|Papaver somniferum]]* (I)
**[[Parietaria pensylvanica]]* (N)
**[[Parnassia glauca]]* (N)
**[[Paronychia canadensis]]* (N)
*''Paronychia fastigiata'' var. ''fastigiata'' (N)
**[[Parthenium hysterophorus]]* (I)
*''Parthenium integrifolium'' var. ''integrifolium'' (N)
**[[Virginia sarmaşığı|Parthenocissus quinquefolia]]* (N)
**[[Parthenocissus tricuspidata]]* (I)
**[[Parthenocissus vitacea]]* (N)
**[[Pascopyrum|Pascopyrum smithii]]* (N)
**[[Paspalum floridanum]]* (N)
**[[Paspalum fluitans]]* (N)
**[[Paspalum laeve]]* (N)
**[[Paspalum pubiflorum]]* (N)
**[[Paspalum setaceum]]* (N)
**[[Passiflora incarnata]]* (N)
**[[Sarı çarkıfelek|Passiflora lutea]]* (N)
**[[Yabani havuç|Pastinaca sativa]]* (I)
**[[Paulownia tomentosa]]* (I)
**[[Paxistima canbyi]]* (N)
*''Pedicularis canadensis'' ssp. ''canadensis'' (N)
**[[Pedicularis lanceolata]]* (N)
**[[Pellaea atropurpurea]]* (N)
*''Pellaea glabella'' ssp. ''glabella'' (N)
**[[Peltandra virginica]]* (N)
**[[Pennisetum glaucum]]* (I)
**[[Penstemon alluviorum]]* (N)
**[[Penstemon calycosus]]* (N)
**[[Penstemon canescens]]* (N)
**[[Penstemon cobaea]]* (N)
**[[Penstemon digitalis]]* (N)
**[[Penstemon grandiflorus]]* (N)
**[[Penstemon hirsutus]]* (N)
**[[Penstemon laevigatus]]* (N)
**[[Penstemon pallidus]]* (N)
*''Penstemon tubiflorus'' var. ''tubiflorus'' (N)
**[[Penthorum sedoides]]* (N)
**[[Perideridia americana]]* (N)
*''Perilla frutescens'' var. ''frutescens'' (I)
**[[Petasites hybridus]]* (I)
**[[Petrorhagia prolifera]]* (I)
**[[Petrorhagia saxifraga]]* (I)
**[[Maydanoz|Petroselinum crispum]]* (I)
**[[Petunia × atkinsiana]]* (I)
**[[Petunia axillaris]]* (I)
**[[Phacelia bipinnatifida]]* (N)
*''Phacelia dubia'' var. ''dubia'' (N)
**[[Phacelia purshii]]* (N)
**[[Phacelia ranunculacea]]* (N)
**[[Phalaris arundinacea]]* (N)
**[[Phalaris canariensis]]* (I)
**[[Phalaris caroliniana]]* (N)
**[[Phaseolus coccineus]]* (I)
*''Phaseolus polystachios'' var. ''polystachios'' (N)
**[[Fasulye|Phaseolus vulgaris]]* (I)
**[[Phegopteris connectilis]]* (N)
**[[Phegopteris hexagonoptera]]* (N)
**[[Phellodendron amurense]]* (I)
**[[Philadelphus coronarius]]* (I)
**[[Philadelphus inodorus]]* (N)
*''Philadelphus pubescens'' var. ''pubescens'' (N)
**[[Philadelphus tomentosus]]* (I)
**[[Phleum pratense]]* (I)
*''Phlox divaricata'' ssp. ''divaricata'' (N)
*''Phlox glaberrima'' ssp. ''triflora'' (N)
**[[Phlox latifolia]]* (N)
*''Phlox maculata'' ssp. ''maculata'' (N)
*''Phlox maculata'' ssp. ''pyramidalis'' (N)
**[[Phlox paniculata]]* (N)
*''Phlox pilosa'' ssp. ''pilosa'' (N)
**[[Phlox stolonifera]]* (N)
*''Phlox subulata'' ssp. ''brittonii'' (N)
*''Phlox subulata'' ssp. ''subulata'' (N)
**[[Phoradendron leucarpum]]* (N)
**[[Photinia floribunda]]* (N)
**[[Photinia melanocarpa]]* (N)
**[[Phragmites australis]]* (N)
**[[Phryma leptostachya]]* (N)
**[[Phyla lanceolata]]* (N)
*''Phyllanthus caroliniensis'' ssp. ''caroliniensis'' (N)
**[[Physalis alkekengi]]* (I)
**[[Physalis grisea]]* (N)
*''Physalis heterophylla'' var. ''heterophylla'' (N)
**[[Physalis hispida]]* (N)
*''Physalis longifolia'' var. ''longifolia'' (N)
*''Physalis longifolia'' var. ''subglabrata'' (N)
*''Physalis philadelphica'' var. ''immaculata'' (I)
*''Physalis pubescens'' var. ''integrifolia'' (N)
*''Physalis pubescens'' var. ''pubescens'' (N)
*''Physalis virginiana'' var. ''virginiana'' (N)
*''Physematium obtusum'' ssp. ''obtusa'' (N)
*''Physocarpus opulifolius'' var. ''intermedius'' (N)
*''Physocarpus opulifolius'' var. ''opulifolius'' (N)
*''Physostegia virginiana'' ssp. ''praemorsa'' (N)
*''Physostegia virginiana'' ssp. ''virginiana'' (N)
*''Phytolacca americana'' var. ''americana'' (N)
**[[Avrupa ladini|Picea abies]]* (I)
**[[Picris echioides]]* (I)
**[[Picris hieracioides]]* (N)
*''Picris hieracioides'' ssp. ''hieracioides'' (I)
**[[Pilea fontana]]* (N)
*''Pilea pumila'' var. ''pumila'' (N)
*''Pimpinella saxifraga'' ssp. ''saxifraga'' (I)
**[[Pinellia ternata]]* (I)
**[[Banks çamı|Pinus banksiana]]* (N)
**[[Pinus echinata]]* (N)
**[[Karaçam|Pinus nigra]]* (I)
**[[Pinus rigida]]* (N)
**[[Veymut çamı|Pinus strobus]]* (N)
**[[Sarıçam (bitki)|Pinus sylvestris]]* (I)
**[[Pinus virginiana]]* (N)
**[[Piptatherum racemosum]]* (N)
**[[Piptochaetium avenaceum]]* (N)
**[[Pistia stratiotes]]* (N)
*''Pityopsis graminifolia'' var. ''latifolia'' (N)
**[[Plantago aristata]]* (N)
**[[Plantago cordata]]* (N)
**[[Dar yapraklı sinirli ot|Plantago lanceolata]]* (I)
**[[Sinirotu|Plantago major]]* (I)
**[[Plantago patagonica]]* (N)
**[[Plantago psyllium]]* (I)
*''Plantago rugelii'' var. ''rugelii'' (N)
**[[Plantago virginica]]* (N)
**[[Platanthera × andrewsii]]* (N)
**[[Platanthera aquilonis]]* (N)
*''Platanthera blephariglottis'' var. ''blephariglottis'' (N)
**[[Platanthera ciliaris]]* (N)
**[[Platanthera clavellata]]* (N)
*''Platanthera flava'' var. ''herbiola'' (N)
**[[Platanthera grandiflora]]* (N)
**[[Platanthera hookeri]]* (N)
**[[Platanthera lacera]]* (N)
**[[Platanthera leucophaea]]* (N)
**[[Platanthera orbiculata]]* (N)
**[[Platanthera peramoena]]* (N)
**[[Platanthera psycodes]]* (N)
**[[Batı çınarı|Platanus occidentalis]]* (N)
*''Pleopeltis polypodioides'' ssp. ''michauxiana'' (N)
**[[Pluchea camphorata]]* (N)
**[[Poa alsodes]]* (N)
**[[Poa annua]]* (I)
**[[Poa arida]]* (N)
**[[Poa bulbosa]]* (I)
**[[Poa chapmaniana]]* (N)
**[[Poa compressa]]* (I)
**[[Poa cuspidata]]* (N)
**[[Poa nemoralis]]* (N)
*''Poa nemoralis'' ssp. ''nemoralis'' (I)
**[[Poa paludigena]]* (N)
**[[Poa palustris]]* (N)
**[[Poa pratensis]]* (I)
*''Poa pratensis'' ssp. ''pratensis'' (N)
**[[Poa saltuensis]]* (N)
**[[Poa sylvestris]]* (N)
**[[Poa trivialis]]* (I)
**[[Poa wolfii]]* (N)
**[[Podophyllum peltatum]]* (N)
**[[Podostemum ceratophyllum]]* (N)
**[[Pogonia ophioglossoides]]* (N)
*''Polanisia dodecandra'' ssp. ''dodecandra'' (N)
*''Polanisia dodecandra'' ssp. ''trachysperma'' (N)
**[[Polanisia jamesii]]* (N)
**[[Polemonium caeruleum]]* (I)
*''Polemonium reptans'' var. ''reptans'' (N)
*''Polemonium reptans'' var. ''villosum'' (N)
**[[Polygala ambigua (disambiguation)|Polygala ambigua]]* (N)
*''Polygala cruciata'' var. ''aquilonia'' (N)
**[[Polygala curtissii]]* (N)
**[[Polygala incarnata]]* (N)
**[[Polygala paucifolia]]* (N)
**[[Polygala polygama]]* (N)
**[[Polygala sanguinea]]* (N)
**[[Polygala senega]]* (N)
*''Polygala verticillata'' var. ''isocycla'' (N)
*''Polygala verticillata'' var. ''verticillata'' (N)
*''Polygonatum biflorum'' var. ''commutatum'' (N)
**[[Polygonatum pubescens]]* (N)
**[[Polygonum achoreum]]* (N)
*''Polygonum amphibium'' var. ''emersum'' (N)
*''Polygonum amphibium'' var. ''stipulaceum'' (N)
**[[Polygonum arenastrum]]* (I)
**[[Polygonum arifolium]]* (N)
**[[Polygonum aviculare]]* (I)
**[[Polygonum buxiforme]]* (N)
**[[Polygonum careyi]]* (N)
*''Polygonum cespitosum'' var. ''longisetum'' (I)
**[[Polygonum ciliinode]]* (N)
*''Polygonum convolvulus'' var. ''convolvulus'' (I)
**[[Polygonum erectum]]* (N)
*''Polygonum fowleri'' ssp. ''fowleri'' (N)
**[[Polygonum hydropiper]]* (I)
**[[Polygonum hydropiperoides]]* (N)
**[[Polygonum lapathifolium]]* (N)
**[[Polygonum orientale]]* (I)
**[[Polygonum pensylvanicum]]* (N)
**[[Polygonum perfoliatum]]* (I)
**[[Polygonum persicaria]]* (I)
*''Polygonum punctatum'' var. ''confertiflorum'' (N)
*''Polygonum punctatum'' var. ''punctatum'' (N)
*''Polygonum ramosissimum'' var. ''ramosissimum'' (N)
**[[Polygonum robustius]]* (N)
**[[Polygonum sachalinense]]* (I)
**[[Polygonum sagittatum]]* (N)
*''Polygonum scandens'' var. ''cristatum'' (N)
*''Polygonum scandens'' var. ''dumetorum'' (N)
*''Polygonum scandens'' var. ''scandens'' (N)
*''Polygonum scandens'' var. ''dumetorum'' (I)
**[[Polygonum setaceum]]* (N)
**[[Polygonum tenue]]* (N)
**[[Polygonum virginianum]]* (N)
**[[Polymnia canadensis]]* (N)
**[[Polypodium appalachianum]]* (N)
**[[Polypodium virginianum]]* (N)
*''Polystichum acrostichoides'' var. ''acrostichoides'' (N)
**[[Pontederia cordata]]* (N)
**[[Ak kavak|Populus alba]]* (I)
*''Populus balsamifera'' ssp. ''balsamifera'' (N)
**[[Populus × canadensis]]* (N)
**[[Populus × canescens]]* (I)
*''Populus deltoides'' ssp. ''deltoides'' (N)
*''Populus deltoides'' ssp. ''monilifera'' (N)
**[[Populus grandidentata]]* (N)
**[[Populus heterophylla]]* (N)
**[[Populus × jackii]]* (N)
**[[Kara kavak|Populus nigra]]* (I)
**[[Populus × smithii]]* (N)
**[[Populus tremuloides]]* (N)
**[[Portulaca grandiflora]]* (I)
**[[Semizotu|Portulaca oleracea]]* (I)
**[[Semizotu|Portulaca oleracea]]* (N)
**[[Potamogeton amplifolius]]* (N)
**[[Potamogeton compressus]]* (N)
**[[Potamogeton crispus]]* (I)
**[[Potamogeton diversifolius]]* (N)
**[[Potamogeton epihydrus]]* (N)
*''Potamogeton foliosus'' ssp. ''foliosus'' (N)
**[[Potamogeton friesii]]* (N)
**[[Potamogeton gramineus]]* (N)
**[[Potamogeton × hagstroemii]]* (N)
**[[Potamogeton hillii]]* (N)
**[[Potamogeton illinoensis]]* (N)
**[[Potamogeton natans]]* (N)
**[[Potamogeton nodosus]]* (N)
**[[Potamogeton perfoliatus]]* (N)
**[[Potamogeton praelongus]]* (N)
**[[Potamogeton pulcher]]* (N)
*''Potamogeton pusillus'' ssp. ''pusillus'' (N)
*''Potamogeton pusillus'' ssp. ''tenuissimus'' (N)
**[[Potamogeton × rectifolius]]* (N)
**[[Potamogeton richardsonii]]* (N)
**[[Potamogeton robbinsii]]* (N)
**[[Potamogeton spirillus]]* (N)
**[[Potamogeton strictifolius]]* (N)
**[[Potamogeton tennesseensis]]* (N)
**[[Potamogeton vaseyi]]* (N)
*''Potentilla argentea'' var. ''argentea'' (I)
*''Potentilla arguta'' ssp. ''arguta'' (N)
*''Potentilla canadensis'' var. ''canadensis'' (N)
*''Potentilla canadensis'' var. ''villosissima'' (N)
**[[Potentilla inclinata]]* (I)
**[[Potentilla intermedia]]* (I)
*''Potentilla norvegica'' ssp. ''monspeliensis'' (N)
**[[Potentilla paradoxa]]* (N)
*''Potentilla pensylvanica'' var. ''pensylvanica'' (N)
**[[Potentilla recta]]* (I)
**[[Potentilla reptans]]* (I)
**[[Potentilla simplex]]* (N)
**[[Prenanthes alba]]* (N)
**[[Prenanthes altissima]]* (N)
**[[Prenanthes aspera]]* (N)
**[[Prenanthes crepidinea]]* (N)
*''Prenanthes racemosa'' var. ''racemosa'' (N)
**[[Prenanthes serpentaria]]* (N)
**[[Prenanthes trifoliolata]]* (N)
*''Proboscidea louisianica'' ssp. ''louisianica'' (N)
**[[Prosartes lanuginosa]]* (N)
**[[Prosartes maculata]]* (N)
*''Proserpinaca palustris'' var. ''amblyogona'' (N)
*''Proserpinaca palustris'' var. ''crebra'' (N)
**[[Prunella laciniata]]* (I)
*''Prunella vulgaris'' ssp. ''lanceolata'' (N)
**[[Prunus americana]]* (N)
**[[Prunus avium]]* (I)
**[[Kiraz eriği|Prunus cerasifera]]* (I)
**[[Vişne|Prunus cerasus]]* (I)
*''Prunus domestica'' var. ''domestica'' (I)
**[[Prunus hortulana]]* (N)
**[[Mahlep|Prunus mahaleb]]* (I)
**[[Prunus mexicana]]* (N)
**[[Prunus munsoniana]]* (N)
**[[Prunus nigra]]* (N)
*''Prunus pensylvanica'' var. ''pensylvanica'' (N)
*''Prunus persica'' var. ''persica'' (I)
*''Prunus pumila'' var. ''pumila'' (N)
*''Prunus serotina'' var. ''serotina'' (N)
**[[Prunus subhirtella]]* (I)
**Prunus susquehanae* (N) (here considered a synonym of *[[Prunus pumila|P. pumila]]*)
**[[Prunus tomentosa]]* (I)
*''Prunus virginiana'' var. ''virginiana'' (N)
**[[Psammophiliella muralis]]* (syn. *Gypsophila muralis*) (I)
**[[Pseudognaphalium macounii]]* (N)
*''Pseudognaphalium obtusifolium'' ssp. ''obtusifolium'' (N)
**[[Pseudolysimachion longifolium]]* (I)
*''Ptelea trifoliata'' ssp. ''trifoliata'' var. ''trifoliata'' (N)
*''Ptelea trifoliata'' ssp. ''trifoliata'' (N)
*''Pteridium aquilinum'' var. ''latiusculum'' (N)
*''Pteridium aquilinum'' var. ''pseudocaudatum'' (N)
**[[Puccinellia distans]]* (N)
*''Puccinellia distans'' ssp. ''distans'' (I)
*''Pueraria montana'' var. ''lobata'' (I)
*''Pycnanthemum incanum'' var. ''incanum'' (N)
*''Pycnanthemum incanum'' var. ''puberulum'' (N)
**[[Pycnanthemum muticum]]* (N)
*''Pycnanthemum pycnanthemoides'' var. ''pycnanthemoides'' (N)
**[[Pycnanthemum tenuifolium]]* (N)
*''Pycnanthemum verticillatum'' var. ''pilosum'' (N)
*''Pycnanthemum verticillatum'' var. ''verticillatum'' (N)
**[[Pycnanthemum virginianum]]* (N)
**[[Pyracantha coccinea]]* (I)
**[[Pyracantha coccinea]]* (N)
**[[Pyrola americana]]* (N)
*''Pyrola asarifolia'' ssp. ''asarifolia'' (N)
**[[Pyrola chlorantha]]* (N)
**[[Pyrola elliptica]]* (N)
**[[Pyrus calleryana]]* (I)
**[[Pyrus communis]]* (I)

## Q
**[[Ak meşe|Quercus alba]]* (N)
**[[Quercus × bebbiana]]* (N)
**[[Quercus bicolor]]* (N)
**[[Quercus × bushii]]* (N)
*''Quercus coccinea'' var. ''coccinea'' (N)
*''Quercus coccinea'' var. ''tuberculata'' (N)
**[[Quercus × deamii]]* (N)
**[[Quercus ellipsoidalis]]* (N)
**[[Quercus × exacta]]* (N)
**[[Quercus falcata]]* (N)
**[[Quercus × fontana]]* (N)
**[[Quercus × hawkinsiae]]* (N)
**[[Quercus imbricaria]]* (N)
**[[Quercus × jackiana]]* (N)
**[[Quercus × leana]]* (N)
*''Quercus macrocarpa'' var. ''macrocarpa'' (N)
*''Quercus marilandica'' var. ''marilandica'' (N)
**[[Quercus muehlenbergii]]* (N)
**[[Quercus × mutabilis]]* (N)
**[[Quercus × palaeolithicola]]* (N)
**[[Bataklık meşesi|Quercus palustris]]* (N)
**[[Quercus prinus]]* (N)
**[[Saplı meşe|Quercus robur]]* (I)
*''Quercus rubra'' var. ''ambigua'' (N)
*''Quercus rubra'' var. ''rubra'' (N)
**[[Quercus × runcinata]]* (N)
**[[Quercus × saulii]]* (N)
**[[Quercus × schuettei]]* (N)
*''Quercus shumardii'' var. ''schneckii'' (N)
*''Quercus shumardii'' var. ''shumardii'' (N)
**[[Quercus stellata]]* (N)
**[[Quercus × tridentata]]* (N)
**[[Quercus velutina]]* (N)

## R
**[[Ranunculus abortivus]]* (N)
*''Ranunculus acris'' var. ''acris'' (N)
*''Ranunculus acris'' var. ''acris'' (I)
**[[Ranunculus allegheniensis]]* (N)
**[[Ranunculus ambigens]]* (N)
**[[Ranunculus arvensis]]* (I)
**[[Ranunculus bulbosus]]* (I)
**[[Ranunculus fascicularis]]* (N)
*''Ranunculus ficaria'' var. ''bulbifera'' (I)
**[[Ranunculus flabellaris]]* (N)
*''Ranunculus hispidus'' var. ''caricetorum'' (N)
*''Ranunculus hispidus'' var. ''hispidus'' (N)
*''Ranunculus hispidus'' var. ''nitidus'' (N)
**[[Ranunculus longirostris]]* (N)
**[[Ranunculus micranthus]]* (N)
**[[Ranunculus parviflorus]]* (I)
**[[Ranunculus pensylvanicus]]* (N)
*''Ranunculus pusillus'' var. ''pusillus'' (N)
*''Ranunculus recurvatus'' var. ''recurvatus'' (N)
**[[Ranunculus repens]]* (I)
*''Ranunculus sceleratus'' var. ''sceleratus'' (N)
**[[Raphanus raphanistrum]]* (I)
**[[Turp|Raphanus sativus]]* (I)
**[[Ratibida columnifera]]* (N)
**[[Ratibida pinnata]]* (N)
**[[Reseda alba]]* (I)
**[[Reseda lutea]]* (I)
**[[Reseda luteola]]* (I)
**[[Reynoutria japonica]]* (syn. *Polygonum cuspidatum*) (I)
**[[Rhamnus alnifolia]]* (N)
**[[Rhamnus cathartica]]* (I)
*''Rhamnus davurica'' ssp. ''davurica'' (I)
*''Rhamnus lanceolata'' ssp. ''glabrata'' (N)
*''Rhamnus lanceolata'' ssp. ''lanceolata'' (N)
**[[Rhamnus utilis]]* (I)
**[[Rheum|Rheum rhabarbarum]]* (I)
**[[Rhexia virginica]]* (N)
**[[Rhododendron calendulaceum]]* (N)
**[[Rhododendron maximum]]* (N)
**[[Rhododendron periclymenoides]]* (N)
**[[Rhododendron prinophyllum]]* (N)
**[[Rhodotypos scandens]]* (I)
*''Rhus aromatica'' var. ''arenaria'' (N)
*''Rhus aromatica'' var. ''aromatica'' (N)
*''Rhus copallinum'' var. ''latifolia'' (N)
**[[Rhus glabra]]* (N)
**[[Rhus pulvinata]]* (N)
**[[Rhus typhina]]* (N)
**[[Rhynchospora alba]]* (N)
**[[Rhynchospora capillacea]]* (N)
**[[Rhynchospora capitellata]]* (N)
**[[Rhynchospora recognita]]* (N)
**[[Ribes americanum]]* (N)
*''Ribes aureum'' var. ''villosum'' (N)
**[[Ribes cynosbati]]* (N)
**[[Ribes glandulosum]]* (N)
**[[Ribes hirtellum]]* (N)
**[[Ribes missouriense]]* (N)
**[[Siyah frenk üzümü|Ribes nigrum]]* (I)
*''Ribes oxyacanthoides'' ssp. ''oxyacanthoides'' (N)
**[[Ribes rotundifolium]]* (N)
**[[Ribes rubrum]]* (I)
**[[Ribes triste]]* (N)
*''Ribes uva-crispa'' var. ''sativum'' (I)
**[[Hint yağı bitkisi|Ricinus communis]]* (I)
**[[Robinia × ambigua]]* (N)
*''Robinia hispida'' var. ''fertilis'' (N)
*''Robinia hispida'' var. ''hispida'' (N)
**[[Robinia pseudoacacia]]* (N)
*''Robinia viscosa'' var. ''viscosa'' (N)
*''Rorippa palustris'' ssp. ''fernaldiana'' (N)
*''Rorippa palustris'' ssp. ''hispida'' (N)
**[[Rorippa sessiliflora]]* (N)
**[[Rorippa sylvestris]]* (I)
*''Rosa arkansana'' var. ''suffulta'' (N)
*''Rosa blanda'' var. ''blanda'' (N)
**[[Kuşburnu|Rosa canina]]* (I)
*''Rosa carolina'' var. ''carolina'' (N)
**[[Rosa centifolia]]* (I)
**[[Rosa cinnamomea]]* (I)
**[[Rosa eglanteria]]* (I)
**[[Rosa gallica]]* (I)
**[[Rosa majalis]]* (I)
**[[Rosa micrantha]]* (I)
**[[Rosa multiflora]]* (I)
**[[Rosa nitida]]* (N)
**[[Rosa × palustriformis]]* (N)
**[[Rosa palustris]]* (N)
**[[Rosa pimpinellifolia]]* (I)
**[[Rosa × rudiuscula]]* (N)
**[[Rosa rugosa]]* (I)
*''Rosa setigera'' var. ''setigera'' (N)
*''Rosa setigera'' var. ''tomentosa'' (N)
**[[Rosa wichuraiana]]* (I)
**[[Rotala ramosior]]* (N)
**[[Rubus aboriginum]]* (N)
*''Rubus allegheniensis'' var. ''allegheniensis'' (N)
*''Rubus allegheniensis'' var. ''gravesii'' (N)
**[[Rubus alumnus]]* (N)
**[[Rubus argutus]]* (N)
**[[Rubus armeniacus]]* (I)
**[[Rubus baileyanus]]* (N)
**[[Rubus bellobatus]]* (N)
**[[Rubus canadensis]]* (N)
**[[Rubus deamii]]* (N)
**[[Rubus depavitus]]* (N)
**[[Rubus fecundus]]* (N)
**[[Rubus flagellaris]]* (N)
**[[Rubus frondosus]]* (N)
**[[Rubus hispidus]]* (N)
*''Rubus idaeus'' ssp. ''strigosus'' (N)
*''Rubus idaeus'' ssp. ''idaeus'' (I)
**[[Rubus invisus]]* (N)
**[[Rubus laciniatus]]* (I)
**[[Rubus laudatus]]* (N)
**[[Rubus meracus]]* (N)
**[[Rubus michiganensis]]* (N)
**[[Rubus multifer]]* (N)
**[[Rubus occidentalis]]* (N)
*''Rubus odoratus'' var. ''odoratus'' (N)
**[[Rubus pensilvanicus]]* (N)
**[[Rubus pergratus]]* (N)
**[[Rubus philadelphicus]]* (N)
**[[Rubus phoenicolasius]]* (I)
**[[Rubus plicatifolius]]* (N)
**[[Rubus prestonensis]]* (N)
*''Rubus pubescens'' var. ''pubescens'' (N)
**[[Rubus recurvans]]* (N)
**[[Rubus recurvicaulis]]* (N)
**[[Rubus roribaccus]]* (N)
**[[Rubus rosa]]* (N)
**[[Rubus setosus]]* (N)
**[[Rubus suus]]* (N)
**[[Rubus trivialis]]* (N)
**[[Rubus uvidus]]* (N)
**[[Rubus vagus]]* (N)
*''Rudbeckia fulgida'' var. ''deamii'' (N)
*''Rudbeckia fulgida'' var. ''fulgida'' (N)
*''Rudbeckia fulgida'' var. ''speciosa'' (N)
*''Rudbeckia fulgida'' var. ''umbrosa'' (N)
*''Rudbeckia grandiflora'' var. ''grandiflora'' (N)
*''Rudbeckia hirta'' var. ''hirta'' (N)
*''Rudbeckia hirta'' var. ''pulcherrima'' (N)
*''Rudbeckia laciniata'' var. ''laciniata'' (N)
*''Rudbeckia triloba'' var. ''triloba'' (N)
*''Ruellia caroliniensis'' ssp. ''caroliniensis'' var. ''caroliniensis'' (N)
*''Ruellia caroliniensis'' ssp. ''caroliniensis'' (N)
**[[Ruellia humilis]]* (N)
**[[Ruellia strepens]]* (N)
**[[Rumex acetosa]]* (N)
*''Rumex acetosa'' ssp. ''acetosa'' (I)
**[[Rumex acetosella]]* (I)
**[[Rumex × acutus]]* (I)
**[[Rumex × acutus]]* (N)
**[[Rumex altissimus]]* (N)
**[[Rumex conglomeratus]]* (I)
*''Rumex crispus'' ssp. ''crispus'' (I)
**[[Rumex maritimus]]* (N)
**[[Rumex obtusifolius]]* (I)
*''Rumex orbiculatus'' var. ''borealis'' (N)
*''Rumex orbiculatus'' var. ''orbiculatus'' (N)
**[[Rumex patientia]]* (I)
*''Rumex salicifolius'' var. ''mexicanus'' (N)
**[[Rumex verticillatus]]* (N)
**[[Ruppia cirrhosa]]* (N)

## S
**[[Sabatia angularis]]* (N)
**[[Saccharum alopecuroides]]* (N)
**[[Saccharum ravennae]]* (I)
*''Sagina decumbens'' ssp. ''decumbens'' (N)
**[[Sagina japonica]]* (I)
**[[Sagina procumbens]]* (I)
**[[Sagina procumbens]]* (N)
**[[Sagittaria australis]]* (N)
**[[Sagittaria brevirostra]]* (N)
*''Sagittaria calycina'' var. ''calycina'' (N)
**[[Sagittaria cuneata]]* (N)
*''Sagittaria graminea'' var. ''graminea'' (N)
**[[Sagittaria latifolia]]* (N)
**[[Sagittaria platyphylla]]* (N)
**[[Sagittaria rigida]]* (N)
**[[Salicornia depressa]]* (N)
**[[Salicornia maritima]]* (N)
**[[Salix alba]]* (I)
**[[Salix amygdaloides]]* (N)
**[[Salix bebbiana]]* (N)
**[[Salix candida]]* (N)
**[[Salix caprea]]* (I)
**[[Salix caroliniana]]* (N)
**[[Salix cinerea]]* (I)
**[[Salix discolor]]* (N)
**[[Salix × ehrhartiana]]* (I)
**[[Salix × ehrhartiana]]* (N)
**[[Salix eriocephala]]* (N)
**[[Salix × fragilis|Salix fragilis]]* (I)
**[[Salix × glatfelteri]]* (N)
*''Salix humilis'' var. ''humilis'' (N)
*''Salix humilis'' var. ''tristis'' (N)
**[[Salix interior]]* (N)
*''Salix lucida'' ssp. ''lucida'' (N)
**[[Salix matsudana]]* (I)
*''Salix myricoides'' var. ''albovestita'' (N)
*''Salix myricoides'' var. ''myricoides'' (N)
**[[Salix nigra]]* (N)
**[[Salix pedicellaris]]* (N)
**[[Salix × pendulina]]* (I)
**[[Salix pentandra]]* (I)
**[[Salix petiolaris]]* (N)
**[[Salix purpurea]]* (I)
**[[Salix × rubens]]* (I)
**[[Salix sericea]]* (N)
**[[Salix serissima]]* (N)
**[[Salix viminalis]]* (I)
**[[Salsola collina]]* (I)
**[[Salsola tragus]]* (I)
*''Salvia azurea'' var. ''grandiflora'' (N)
**[[Salvia coccinea]]* (N)
**[[Salvia farinacea]]* (N)
**[[Salvia lyrata]]* (N)
**[[Ada çayı|Salvia officinalis]]* (I)
**[[Salvia pratensis]]* (I)
**[[Salvia reflexa]]* (N)
**[[Salvia splendens]]* (I)
**[[Salvia × superba]]* (I)
**[[Salvia × sylvestris]]* (I)
**[[Sambucus nigra]]* (I)
*''Sambucus nigra'' ssp. ''canadensis'' (N)
*''Sambucus racemosa'' var. ''racemosa'' (N)
**[[Samolus valerandi]]* (I)
*''Samolus valerandi'' ssp. ''parviflorus'' (N)
**[[Sanguinaria canadensis]]* (N)
**[[Sanguisorba canadensis]]* (N)
*''Sanguisorba minor'' ssp. ''balearica'' (I)
*''Sanicula canadensis'' var. ''canadensis'' (N)
*''Sanicula canadensis'' var. ''grandis'' (N)
**[[Sanicula marilandica]]* (N)
**[[Sanicula odorata]]* (N)
**[[Sanicula smallii]]* (N)
**[[Sanicula trifoliata]]* (N)
**[[Saponaria officinalis]]* (I)
*''Sarracenia purpurea'' ssp. ''purpurea'' (N)
**[[Sassafras albidum]]* (N)
**[[Mercimek Otu|Satureja hortensis]]* (I)
**[[Saururus cernuus]]* (N)
**[[Saxifraga pensylvanica]]* (N)
*''Saxifraga virginiensis'' var. ''virginiensis'' (N)
**[[Scabiosa columbaria]]* (I)
**[[Scandix pecten-veneris]]* (I)
**[[Schedonorus phoenix]]* (I)
**[[Schedonorus pratensis]]* (I)
*''Scheuchzeria palustris'' ssp. ''americana'' (N)
**[[Schizachne purpurascens]]* (N)
**[[Schizachyrium littorale]]* (N)
*''Schizachyrium scoparium'' var. ''scoparium'' (N)
*''Schoenoplectus acutus'' var. ''acutus'' (N)
**[[Schoenoplectus fluviatilis]]* (N)
*''Schoenoplectus pungens'' var. ''pungens'' (N)
**[[Schoenoplectus purshianus]]* (N)
**[[Schoenoplectus saximontanus]]* (N)
**[[Schoenoplectus smithii]]* (N)
**[[Schoenoplectus subterminalis]]* (N)
**[[Schoenoplectus tabernaemontani]]* (N)
**[[Schoenoplectus torreyi]]* (N)
**[[Scilla siberica]]* (I)
**[[Scirpus atrovirens]]* (N)
**[[Scirpus cyperinus]]* (N)
**[[Scirpus expansus]]* (N)
**[[Scirpus georgianus]]* (N)
**[[Scirpus hattorianus]]* (N)
**[[Scirpus pedicellatus]]* (N)
**[[Scirpus pendulus]]* (N)
**[[Scirpus polyphyllus]]* (N)
**[[Scleranthus annuus]]* (I)
**[[Scleria oligantha]]* (N)
*''Scleria pauciflora'' var. ''caroliniana'' (N)
*''Scleria pauciflora'' var. ''pauciflora'' (N)
**[[Scleria triglomerata]]* (N)
**[[Scleria verticillata]]* (N)
**[[Sclerochloa dura]]* (I)
**[[Sclerochloa dura]]* (N)
**[[Scrophularia lanceolata]]* (N)
**[[Scrophularia marilandica]]* (N)
*''Scutellaria elliptica'' var. ''elliptica'' (N)
*''Scutellaria elliptica'' var. ''hirsuta'' (N)
**[[Scutellaria galericulata]]* (N)
*''Scutellaria incana'' var. ''incana'' (N)
**[[Scutellaria integrifolia]]* (N)
*''Scutellaria lateriflora'' var. ''lateriflora'' (N)
**[[Scutellaria nervosa]]* (N)
*''Scutellaria ovata'' ssp. ''ovata'' (N)
*''Scutellaria parvula'' var. ''missouriensis'' (N)
*''Scutellaria parvula'' var. ''parvula'' (N)
**[[Scutellaria saxatilis]]* (N)
**[[Scutellaria serrata]]* (N)
**[[Çavdar|Secale cereale]]* (I)
**[[Securigera varia]]* (I)
**[[Sedum acre]]* (I)
**[[Sedum album]]* (I)
**[[Sedum dendroideum]]* (I)
**[[Sedum pulchellum]]* (N)
**[[Sedum reflexum]]* (I)
**[[Sedum sarmentosum]]* (I)
**[[Sedum sexangulare]]* (I)
**[[Sedum ternatum]]* (N)
**[[Selaginella apoda]]* (N)
**[[Selaginella eclipes]]* (N)
**[[Selaginella rupestris]]* (N)
**[[Senecio sylvaticus]]* (I)
**[[Senecio vulgaris]]* (I)
**[[Senna hebecarpa]]* (N)
**[[Senna marilandica]]* (N)
**[[Sericocarpus asteroides]]* (N)
**[[Sericocarpus linifolius]]* (N)
**[[Sesamum orientale]]* (I)
**[[Setaria faberi]]* (I)
**[[Setaria italica]]* (I)
**[[Setaria parviflora]]* (N)
*''Setaria pumila'' ssp. ''pumila'' (I)
**[[Setaria verticillata]]* (I)
*''Setaria viridis'' var. ''viridis'' (I)
**[[Shepherdia canadensis]]* (N)
**[[Sherardia arvensis]]* (I)
**[[Sibara virginica]]* (N)
**[[Sicyos angulatus]]* (N)
**[[Sida hermaphrodita]]* (N)
**[[Sida spinosa]]* (N)
**[[Silene antirrhina]]* (N)
**[[Silene armeria]]* (I)
*''Silene caroliniana'' ssp. ''pensylvanica'' (N)
*''Silene caroliniana'' ssp. ''wherryi'' (N)
**[[Silene conica]]* (I)
**[[Silene csereii]]* (I)
**[[Silene dichotoma]]* (I)
**[[Silene dioica]]* (I)
*''Silene latifolia'' ssp. ''alba'' (I)
**[[Silene nivea]]* (N)
**[[Silene noctiflora]]* (I)
**[[Silene nutans]]* (I)
**[[Silene regia]]* (N)
**[[Silene rotundifolia]]* (N)
**[[Silene stellata]]* (N)
*''Silene virginica'' var. ''virginica'' (N)
**[[Silene vulgaris]]* (I)
*''Silphium laciniatum'' var. ''laciniatum'' (N)
*''Silphium perfoliatum'' var. ''perfoliatum'' (N)
*''Silphium terebinthinaceum'' var. ''luciae-brauniae'' (N)
*''Silphium terebinthinaceum'' var. ''terebinthinaceum'' (N)
*''Silphium trifoliatum'' var. ''latifolium'' (N)
*''Silphium trifoliatum'' var. ''trifoliatum'' (N)
**[[Silybum marianum]]* (I)
**[[Sinapis alba]]* (I)
*''Sinapis arvensis'' ssp. ''arvensis'' (I)
**[[Sisymbrium altissimum]]* (I)
**[[Sisymbrium irio]]* (I)
**[[Sisymbrium loeselii]]* (I)
**[[Sisymbrium officinale]]* (I)
**[[Sisyrinchium albidum]]* (N)
**[[Sisyrinchium angustifolium]]* (N)
**[[Sisyrinchium atlanticum]]* (N)
*''Sisyrinchium montanum'' var. ''crebrum'' (N)
**[[Sisyrinchium mucronatum]]* (N)
**[[Sium suave]]* (N)
**[[Smallanthus uvedalia]]* (N)
**[[Smilax ecirrhata]]* (N)
**[[Smilax glauca]]* (N)
**[[Smilax herbacea]]* (N)
**[[Smilax illinoensis]]* (N)
**[[Smilax lasioneura]]* (N)
**[[Smilax pulverulenta]]* (N)
**[[Smilax rotundifolia]]* (N)
**[[Smilax tamnoides]]* (N)
*''Solanum carolinense'' var. ''carolinense'' (N)
*''Solanum dulcamara'' var. ''dulcamara'' (I)
*''Solanum lycopersicum'' var. ''lycopersicum'' (I)
**[[Solanum physalifolium]]* (I)
**[[Solanum ptychanthum]]* (N)
**[[Solanum rostratum]]* (N)
**[[Solanum triflorum]]* (N)
**[[Patates|Solanum tuberosum]]* (I)
**[[Solidago altissima]]* (N)
*''Solidago arguta'' var. ''arguta'' (N)
**[[Solidago bicolor]]* (N)
**[[Solidago caesia]]* (N)
*''Solidago canadensis'' var. ''canadensis'' (N)
*''Solidago canadensis'' var. ''gilvocanescens'' (N)
*''Solidago canadensis'' var. ''hargeri'' (N)
**[[Solidago erecta]]* (N)
**[[Solidago flexicaulis]]* (N)
**[[Solidago gigantea]]* (N)
*''Solidago hispida'' var. ''hispida'' (N)
**[[Solidago juncea]]* (N)
*''Solidago nemoralis'' var. ''nemoralis'' (N)
*''Solidago odora'' var. ''odora'' (N)
*''Solidago patula'' var. ''patula'' (N)
*''Solidago puberula'' var. ''puberula'' (N)
*''Solidago rugosa'' ssp. ''aspera'' (N)
*''Solidago rugosa'' ssp. ''rugosa'' var. ''rugosa'' (N)
*''Solidago rugosa'' ssp. ''rugosa'' var. ''villosa'' (N)
*''Solidago rugosa'' ssp. ''rugosa'' (N)
**[[Solidago rupestris]]* (N)
*''Solidago sempervirens'' var. ''sempervirens'' (N)
*''Solidago speciosa'' var. ''rigidiuscula'' (N)
*''Solidago speciosa'' var. ''speciosa'' (N)
**[[Solidago sphacelata]]* (N)
**[[Solidago squarrosa]]* (N)
*''Solidago uliginosa'' var. ''linoides'' (N)
*''Solidago uliginosa'' var. ''uliginosa'' (N)
*''Solidago ulmifolia'' var. ''ulmifolia'' (N)
*''Sonchus arvensis'' ssp. ''arvensis'' (I)
*''Sonchus arvensis'' ssp. ''uliginosus'' (I)
**[[Sonchus asper]]* (I)
**[[Sonchus oleraceus]]* (I)
**[[Sorbaria sorbifolia]]* (I)
**[[Kuş üvezi|Sorbus aucuparia]]* (I)
**[[Sorbus decora]]* (N)
**[[Sorghastrum nutans]]* (N)
*''Sorghum bicolor'' ssp. ''bicolor'' (I)
**[[Sorghum halepense]]* (I)
**[[Sparganium americanum]]* (N)
**[[Sparganium androcladum]]* (N)
**[[Sparganium emersum]]* (I)
**[[Sparganium emersum]]* (N)
**[[Sparganium eurycarpum]]* (N)
**[[Spartina pectinata]]* (N)
**[[Spergula arvensis]]* (I)
**[[Spergularia maritima]]* (I)
**[[Spergularia rubra]]* (I)
**[[Spergularia salina]]* (N)
**[[Spermacoce glabra]]* (N)
**[[Sphenopholis intermedia]]* (N)
**[[Sphenopholis nitida]]* (N)
**[[Sphenopholis obtusata]]* (N)
**[[Sphenopholis × pallens]]* (N)
**[[Sphenopholis pensylvanica]]* (N)
**[[Ispanak|Spinacia oleracea]]* (I)
*''Spiraea alba'' var. ''alba'' (N)
*''Spiraea alba'' var. ''latifolia'' (N)
*''Spiraea japonica'' var. ''fortunei'' (I)
**[[Spiraea prunifolia]]* (I)
**[[Spiraea tomentosa]]* (N)
**[[Spiraea × vanhouttei]]* (I)
**[[Spiraea virginiana]]* (N)
**[[Spiranthes cernua]]* (N)
*''Spiranthes lacera'' var. ''gracilis'' (N)
*''Spiranthes lacera'' var. ''lacera'' (N)
**[[Spiranthes lucida]]* (N)
**[[Spiranthes magnicamporum]]* (N)
**[[Spiranthes ochroleuca]]* (N)
*''Spiranthes ovalis'' var. ''erostellata'' (N)
**[[Spiranthes romanzoffiana]]* (N)
**[[Spiranthes tuberosa]]* (N)
**[[Spiranthes vernalis]]* (N)
**[[Spirodela polyrrhiza]]* (N)
*''Sporobolus compositus'' var. ''compositus'' (N)
**[[Sporobolus cryptandrus]]* (N)
**[[Sporobolus heterolepis]]* (N)
**[[Sporobolus neglectus]]* (N)
*''Sporobolus vaginiflorus'' var. ''ozarkanus'' (N)
*''Sporobolus vaginiflorus'' var. ''vaginiflorus'' (N)
**[[Stachys aspera]]* (N)
**[[Stachys cordata]]* (N)
**[[Stachys germanica]]* (I)
**[[Stachys palustris]]* (N)
*''Stachys pilosa'' var. ''arenicola'' (N)
**[[Stachys sylvatica]]* (I)
**[[Stachys tenuifolia]]* (N)
**[[Staphylea trifolia]]* (N)
**[[Stellaria alsine]]* (N)
**[[Stellaria corei]]* (N)
**[[Stellaria graminea]]* (I)
**[[Stellaria holostea]]* (I)
*''Stellaria longifolia'' var. ''longifolia'' (N)
*''Stellaria media'' ssp. ''media'' (I)
*''Stellaria media'' ssp. ''pallida'' (I)
**[[Stellaria pubera]]* (N)
*''Stenanthium gramineum'' var. ''gramineum'' (N)
*''Stenanthium gramineum'' var. ''robustum'' (N)
*''Stenaria nigricans'' var. ''nigricans'' (N)
**[[Stenosiphon linifolius]]* (N)
*''Streptopus lanceolatus'' var. ''lanceolatus'' (N)
*''Streptopus lanceolatus'' var. ''roseus'' (N)
**[[Strophostyles helvola]]* (N)
**[[Strophostyles leiosperma]]* (N)
**[[Strophostyles umbellata]]* (N)
*''Stuckenia filiformis'' ssp. ''alpina'' (N)
**[[Stuckenia pectinata]]* (N)
**[[Stuckenia vaginata]]* (N)
**[[Stylophorum diphyllum]]* (N)
**[[Stylosanthes biflora]]* (N)
**[[Japon soforası|Styphnolobium japonicum]]* (I)
**[[Styrax americanus]]* (N)
**[[Styrax grandifolius]]* (N)
**[[Suaeda calceoliformis]]* (N)
**[[Sullivantia sullivantii]]* (N)
*''Symphoricarpos albus'' var. ''albus'' (N)
*''Symphoricarpos albus'' var. ''laevigatus'' (N)
**[[Symphoricarpos occidentalis]]* (N)
**[[Symphoricarpos orbiculatus]]* (N)
**[[Symphyotrichum boreale]]* (N)
**[[Symphyotrichum ciliatum]]* (N)
**[[Symphyotrichum cordifolium]]* (N)
*''Symphyotrichum drummondii'' var. ''drummondii'' (N)
*''Symphyotrichum dumosum'' var. ''strictior'' (N)
*''Symphyotrichum ericoides'' var. ''ericoides'' (N)
*''Symphyotrichum laeve'' var. ''laeve'' (N)
*''Symphyotrichum lanceolatum'' ssp. ''lanceolatum'' var. ''hirsuticaule'' (N)
*''Symphyotrichum lanceolatum'' ssp. ''lanceolatum'' var. ''interior'' (N)
*''Symphyotrichum lanceolatum'' ssp. ''lanceolatum'' var. ''lanceolatum'' (N)
*''Symphyotrichum lanceolatum'' ssp. ''lanceolatum'' var. ''latifolium'' (N)
*''Symphyotrichum lanceolatum'' ssp. ''lanceolatum'' (N)
*''Symphyotrichum lateriflorum'' var. ''lateriflorum'' (N)
**[[Symphyotrichum lowrieanum]]* (N)
**[[Symphyotrichum novae-angliae]]* (N)
**[[Symphyotrichum oblongifolium]]* (N)
**[[Symphyotrichum ontarionis]]* (N)
*''Symphyotrichum oolentangiense'' var. ''oolentangiense'' (N)
*''Symphyotrichum patens'' var. ''patens'' (N)
**[[Symphyotrichum phlogifolium]]* (N)
*''Symphyotrichum pilosum'' var. ''pilosum'' (N)
*''Symphyotrichum pilosum'' var. ''pringlei'' (N)
*''Symphyotrichum praealtum'' var. ''praealtum'' (N)
**[[Symphyotrichum prenanthoides]]* (N)
*''Symphyotrichum puniceum'' var. ''puniceum'' (N)
**[[Symphyotrichum racemosum]]* (N)
**[[Symphyotrichum sericeum]]* (N)
**[[Symphyotrichum shortii]]* (N)
**[[Symphyotrichum subulatum]]* (N)
**[[Symphyotrichum undulatum]]* (N)
**[[Symphyotrichum urophyllum]]* (N)
**[[Symphytum asperum]]* (I)
**[[Symphytum officinale]]* (I)
**[[Symplocarpus foetidus]]* (N)
**[[Synandra|Synandra hispidula]]* (N)
**[[Hakiki leylak|Syringa vulgaris]]* (I)

## T
**[[Taenidia integerrima]]* (N)
**[[Kadife çiçeği|Tagetes erecta]]* (I)
**[[Kadife çiçeği|Tagetes patula]]* (I)
**[[Tamarix chinensis]]* (I)
**[[Tanacetum balsamita]]* (I)
**[[Tanacetum coccineum]]* (I)
**[[Tanacetum parthenium]]* (I)
**[[Tanacetum vulgare]]* (I)
**[[Taraxacum laevigatum]]* (I)
**[[Karahindiba|Taraxacum officinale]]* (N)
*''Taraxacum officinale'' ssp. ''officinale'' (I)
**[[Taxodium distichum]]* (N)
**[[Taxus canadensis]]* (N)
**[[Taxus cuspidata]]* (I)
**[[Tephrosia virginiana]]* (N)
**[[Tetradium daniellii]]* (I)
**[[Tetragonia tetragonioides]]* (I)
**[[Tetraneuris herbacea]]* (N)
*''Teucrium canadense'' var. ''canadense'' (N)
*''Teucrium canadense'' var. ''occidentale'' (N)
**[[Thalictrum dasycarpum]]* (N)
**[[Thalictrum dioicum]]* (N)
**[[Thalictrum pubescens]]* (N)
**[[Thalictrum revolutum]]* (N)
**[[Thalictrum thalictroides]]* (N)
**[[Thaspium barbinode]]* (N)
*''Thaspium trifoliatum'' var. ''aureum'' (N)
*''Thaspium trifoliatum'' var. ''trifoliatum'' (N)
**[[Thelypteris noveboracensis]]* (N)
*''Thelypteris palustris'' var. ''pubescens'' (N)
**[[Thlaspi alliaceum]]* (I)
**[[Thlaspi arvense]]* (I)
**[[Batı mazısı|Thuja occidentalis]]* (N)
**[[Thymelaea passerina]]* (I)
**[[Thymelaea passerina]]* (N)
*''Thymus praecox'' ssp. ''arcticus'' (I)
*''Tiarella cordifolia'' var. ''cordifolia'' (N)
*''Tilia americana'' var. ''americana'' (N)
*''Tilia americana'' var. ''heterophylla'' (N)
**[[Tilia × europaea]]* (I)
**[[Tipularia discolor]]* (N)
*''Torilis arvensis'' ssp. ''arvensis'' (N)
*''Torilis arvensis'' ssp. ''arvensis'' (I)
**[[Torilis japonica]]* (I)
*''Torreyochloa pallida'' var. ''pallida'' (N)
*''Toxicodendron radicans'' ssp. ''negundo'' (N)
**[[Toxicodendron rydbergii]]* (N)
**[[Toxicodendron vernix]]* (N)
**[[Tradescantia ohiensis]]* (N)
*''Tradescantia subaspera'' var. ''subaspera'' (N)
**[[Tradescantia virginiana]]* (N)
**[[Tragopogon dubius]]* (I)
**[[Tragopogon lamottei]]* (I)
**[[Tragopogon porrifolius]]* (I)
**[[Triadenum fraseri]]* (N)
**[[Triadenum tubulosum]]* (N)
**[[Triadenum virginicum]]* (N)
**[[Triadenum walteri]]* (N)
**[[Triantha glutinosa]]* (N)
**[[Tribulus terrestris]]* (I)
**[[Trichomanes boschianum]]* (N)
**[[Trichomanes intricatum]]* (N)
**[[Trichophorum planifolium]]* (N)
**[[Trichostema brachiatum]]* (N)
**[[Trichostema dichotomum]]* (N)
**[[Trichostema setaceum]]* (N)
*''Tridens flavus'' var. ''flavus'' (N)
*''Trientalis borealis'' ssp. ''borealis'' (N)
**[[Trifolium ambiguum]]* (I)
**[[Trifolium arvense]]* (I)
**[[Trifolium aureum]]* (I)
**[[Trifolium campestre]]* (I)
**[[Trifolium dubium]]* (I)
**[[Trifolium hybridum]]* (I)
**[[Kırmızı üçgül|Trifolium incarnatum]]* (I)
**[[Trifolium pratense]]* (I)
**[[Trifolium reflexum]]* (N)
**[[Trifolium repens]]* (I)
**[[Trifolium resupinatum]]* (I)
**[[Trifolium stoloniferum]]* (N)
**[[Triglochin maritima]]* (N)
**[[Triglochin palustris]]* (N)
**[[Trillium cernuum]]* (N)
**[[Trillium erectum]]* (N)
**[[Trillium flexipes]]* (N)
**[[Trillium grandiflorum]]* (N)
**[[Trillium nivale]]* (N)
**[[Trillium recurvatum]]* (N)
**[[Trillium sessile]]* (N)
**[[Trillium undulatum]]* (N)
**[[Triodanis perfoliata]]* (N)
**[[Triosteum angustifolium]]* (N)
*''Triosteum aurantiacum'' var. ''aurantiacum'' (N)
*''Triosteum aurantiacum'' var. ''glaucescens'' (N)
*''Triosteum aurantiacum'' var. ''illinoense'' (N)
**[[Triosteum perfoliatum]]* (N)
**[[Triphora trianthophora]]* (N)
**[[Triplasis purpurea]]* (N)
**[[Tripleurospermum maritimum]]* (N)
*''Tripleurospermum maritimum'' ssp. ''maritimum'' (I)
**[[Tripsacum dactyloides]]* (N)
**[[Buğday|Triticum aestivum]]* (I)
*''Trollius laxus'' ssp. ''laxus'' (N)
**[[Tsuga canadensis]]* (N)
**[[Tulipa gesneriana]]* (I)
**[[Öksürük otu|Tussilago farfara]]* (I)
**[[Typha angustifolia]]* (I)
**[[Typha angustifolia]]* (N)
**[[Typha × glauca]]* (N)
**[[Typha latifolia]]* (N)

## U
**[[Ulmus americana]]* (N)
**[[Ulmus procera]]* (I)
**[[Sibirya karaağacı|Ulmus pumila]]* (I)
**[[Ulmus rubra]]* (N)
**[[Ulmus thomasii]]* (N)
**[[Urtica chamaedryoides]]* (N)
*''Urtica dioica'' ssp. ''gracilis'' (N)
*''Urtica dioica'' ssp. ''dioica'' (I)
**[[Utricularia cornuta]]* (N)
**[[Utricularia geminiscapa]]* (N)
**[[Utricularia gibba]]* (N)
**[[Utricularia intermedia]]* (N)
**[[Utricularia macrorhiza]]* (N)
**[[Utricularia minor]]* (N)
**[[Uvularia grandiflora]]* (N)
**[[Uvularia perfoliata]]* (N)
**[[Uvularia sessilifolia]]* (N)

## V
**[[Vaccaria hispanica]]* (I)
**[[Vaccinium angustifolium]]* (N)
**[[Vaccinium corymbosum]]* (N)
**[[Vaccinium fuscatum]]* (N)
**[[Vaccinium macrocarpon]]* (N)
**[[Vaccinium myrtilloides]]* (N)
**[[Vaccinium oxycoccos]]* (N)
**[[Vaccinium pallidum]]* (N)
**[[Vaccinium simulatum]]* (N)
**[[Vaccinium stamineum]]* (N)
*''Valeriana edulis'' var. ''ciliata'' (N)
**[[Kedi otu|Valeriana officinalis]]* (I)
**[[Valeriana pauciflora]]* (N)
**[[Valeriana uliginosa]]* (N)
**[[Valerianella chenopodiifolia]]* (N)
**[[Valerianella locusta]]* (I)
**[[Valerianella radiata]]* (N)
**[[Valerianella umbilicata]]* (N)
**[[Vallisneria americana]]* (N)
**[[Veratrum virginicum]]* (N)
**[[Veratrum viride]]* (N)
**[[Veratrum woodii]]* (N)
**[[Verbascum blattaria]]* (I)
**[[Verbascum phlomoides]]* (I)
**[[Mor sığırkuyruğu|Verbascum phoeniceum]]* (I)
**[[Verbascum thapsus]]* (I)
**[[Verbascum virgatum]]* (I)
**[[Verbena bracteata]]* (N)
**[[Verbena × engelmannii]]* (N)
*''Verbena hastata'' var. ''hastata'' (N)
**[[Verbena × moechina]]* (N)
**[[Verbena simplex]]* (N)
**[[Verbena stricta]]* (N)
*''Verbena urticifolia'' var. ''leiocarpa'' (N)
*''Verbena urticifolia'' var. ''urticifolia'' (N)
**[[Verbesina alternifolia]]* (N)
**[[Verbesina helianthoides]]* (N)
**[[Verbesina occidentalis]]* (N)
*''Verbesina virginica'' var. ''virginica'' (N)
**[[Vernonia arkansana]]* (N)
*''Vernonia fasciculata'' ssp. ''fasciculata'' (N)
*''Vernonia gigantea'' ssp. ''gigantea'' (N)
**[[Vernonia × illinoensis]]* (N)
**[[Vernonia missurica]]* (N)
**[[Vernonia noveboracensis]]* (N)
**[[Veronica agrestis]]* (I)
**[[Veronica americana]]* (N)
**[[Veronica anagallis-aquatica]]* (N)
**[[Veronica arvensis]]* (I)
*''Veronica austriaca'' ssp. ''teucrium'' (I)
**[[Veronica beccabunga]]* (I)
**[[Veronica chamaedrys]]* (I)
**[[Veronica filiformis]]* (I)
**[[Veronica hederifolia]]* (I)
*''Veronica officinalis'' var. ''officinalis'' (I)
*''Veronica peregrina'' ssp. ''peregrina'' (N)
*''Veronica peregrina'' ssp. ''xalapensis'' (N)
**[[Veronica persica]]* (I)
**[[Veronica polita]]* (I)
**[[Veronica scutellata]]* (N)
**[[Veronica serpyllifolia]]* (N)
*''Veronica serpyllifolia'' ssp. ''serpyllifolia'' (I)
**[[Veronica verna]]* (I)
**[[Veronicastrum virginicum]]* (N)
**[[Viburnum acerifolium]]* (N)
**[[Viburnum buddleifolium]]* (I)
*''Viburnum dentatum'' var. ''dentatum'' (N)
*''Viburnum dentatum'' var. ''venosum'' (N)
**[[Viburnum lantana]]* (I)
**[[Viburnum lantanoides]]* (N)
**[[Viburnum lentago]]* (N)
**[[Viburnum molle]]* (N)
*''Viburnum nudum'' var. ''cassinoides'' (N)
*''Viburnum opulus'' var. ''americanum'' (N)
*''Viburnum opulus'' var. ''opulus'' (I)
**[[Viburnum plicatum]]* (I)
**[[Viburnum prunifolium]]* (N)
**[[Viburnum rafinesqueanum]]* (N)
**[[Viburnum recognitum]]* (N)
**[[Viburnum × rhytidophylloides]]* (I)
**[[Viburnum rufidulum]]* (N)
*''Vicia americana'' ssp. ''americana'' (N)
**[[Vicia caroliniana]]* (N)
*''Vicia cracca'' ssp. ''cracca'' (I)
**[[Vicia hirsuta]]* (I)
*''Vicia sativa'' ssp. ''nigra'' (I)
*''Vicia sativa'' ssp. ''sativa'' (I)
**[[Vicia tetrasperma]]* (I)
*''Vicia villosa'' ssp. ''varia'' (I)
*''Vicia villosa'' ssp. ''villosa'' (I)
**[[Börülce|Vigna unguiculata]]* (I)
**[[Vinca major]]* (I)
**[[Küçük Cezayir menekşesi|Vinca minor]]* (I)
**[[Viola affinis]]* (N)
**[[Viola arvensis]]* (I)
**[[Viola × bernardii]]* (N)
**[[Viola bicolor]]* (N)
**[[Viola × bissellii]]* (N)
*''Viola blanda'' var. ''blanda'' (N)
*''Viola blanda'' var. ''palustriformis'' (N)
**[[Viola × brauniae]]* (N)
*''Viola canadensis'' var. ''canadensis'' (N)
**[[Viola × conjugens]]* (N)
**[[Viola × consobrina]]* (N)
**[[Viola × cooperrideri]]* (N)
**[[Viola × cordifolia]]* (N)
**[[Viola cucullata]]* (N)
**[[Viola × eclipes]]* (N)
**[[Viola × filicetorum]]* (N)
**[[Viola hastata]]* (N)
**[[Viola hirsutula]]* (N)
**[[Viola labradorica]]* (N)
*''Viola lanceolata'' ssp. ''lanceolata'' (N)
*''Viola macloskeyi'' ssp. ''pallens'' (N)
**[[Viola × malteana]]* (N)
**[[Viola missouriensis]]* (N)
**[[Viola nephrophylla]]* (N)
**[[Viola odorata]]* (I)
**[[Viola × palmata]]* (N)
**[[Viola pedata]]* (N)
**[[Viola pedatifida]]* (N)
**[[Viola × populifolia]]* (N)
**[[Viola × primulifolia]]* (N)
*''Viola pubescens'' var. ''pubescens'' (N)
*''Viola pubescens'' var. ''scabriuscula'' (N)
**[[Viola × ravida]]* (N)
**[[Viola rostrata]]* (N)
**[[Viola rotundifolia]]* (N)
*''Viola sagittata'' var. ''ovata'' (N)
*''Viola sagittata'' var. ''sagittata'' (N)
**[[Viola selkirkii]]* (N)
**[[Viola × slavinii]]* (N)
**[[Viola sororia]]* (N)
**[[Viola striata]]* (N)
**[[Hercai menekşe|Viola tricolor]]* (I)
*''Viola triloba'' var. ''dilatata'' (N)
*''Viola triloba'' var. ''triloba'' (N)
**[[Viola tripartita]]* (N)
**[[Viola walteri]]* (N)
**[[Viola × wittrockiana]]* (I)
*''Vitex negundo'' var. ''heterophylla'' (I)
*''Vitis aestivalis'' var. ''aestivalis'' (N)
*''Vitis aestivalis'' var. ''bicolor'' (N)
*''Vitis cinerea'' var. ''baileyana'' (N)
**[[Vitis labrusca]]* (N)
**[[Vitis riparia]]* (N)
**[[Vitis vulpina]]* (N)
**[[Vittaria appalachiana]]* (N)
**[[Vulpia bromoides]]* (I)
**[[Vulpia myuros]]* (I)
*''Vulpia octoflora'' var. ''glauca'' (N)

## W
*''Waldsteinia fragarioides'' ssp. ''fragarioides'' (N)
**[[Wisteria floribunda]]* (I)
**[[Wisteria frutescens]]* (N)
**[[Wolffia borealis]]* (N)
**[[Wolffia brasiliensis]]* (N)
**[[Wolffia columbiana]]* (N)
**[[Wolffiella gladiata]]* (N)
**[[Woodsia ilvensis]]* (N)
**[[Woodwardia virginica]]* (N)

## X
**[[Xanthium spinosum]]* (I)
*''Xanthium strumarium'' var. ''canadense'' (N)
*''Xanthium strumarium'' var. ''glabratum'' (N)
**[[Xanthorhiza simplicissima]]* (N)
*''Xyris difformis'' var. ''difformis'' (N)
**[[Xyris torta]]* (N)

## Y
**[[Yucca filamentosa]]* (N)

## Z
**[[Zannichellia palustris]]* (N)
**[[Zanthoxylum americanum]]* (N)
*''Zea mays'' ssp. ''mays'' (I)
**[[Zelkova serrata]]* (I)
*''Zigadenus elegans'' ssp. ''glaucus'' (N)
*''Zizania aquatica'' var. ''aquatica'' (N)
*''Zizania palustris'' var. ''interior'' (N)
**[[Zizia aptera]]* (N)
**[[Zizia aurea]]* (N)

## Ayrıca bakınız
* Flora

## Kaynakça
USDA PLANTS Database

## Dış bağlantılar
* Ohio's top ten invasive plants
* Rare Native Ohio Plants 2006-2007
* Bibliography - Ohio State University Extension
* ''Flora of North America''