# 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)
 - "Acer campestre" (I)
 - "Acer × freemanii" (N)
 - "Acer ginnala" (I)
 - "Acer negundo" var. "negundo" (N)
 - "Acer negundo" var. "violaceum" (N)
 - "Acer nigrum" (N)
 - "Acer palmatum" (I)
 - "Acer pensylvanicum" (N)
 - "Acer platanoides" (I)
 - "Acer rubrum" var. "rubrum" (N)
 - "Acer rubrum" var. "trilobum" (N)
 - "Acer saccharinum" (N)
 - "Acer saccharum" var. "saccharum" (N)
 - "Acer spicatum" (N)
 - "Acer tataricum" (I)
 - "Achillea millefolium" var. "occidentalis" (N)
 - "Achillea millefolium" var. "millefolium" (I)
 - "Achillea ptarmica" (I)
 - "Achyranthes japonica" var. "hachijoensis" (I)
 - "Acinos arvensis", synonym of "Clinopodium acinos" (I)
 - "Aconitum noveboracense" (N)
 - "Aconitum uncinatum" ssp. "uncinatum" (N)
 - "Acorus americanus" (N)
 - "Acorus calamus" (I)
 - "Acroptilon repens" (I)
 - "Actaea pachypoda" (N)
 - "Actaea racemosa" var. "racemosa" (N)
 - "Actaea rubra" ssp. "rubra" (N)
 - "Actinidia arguta" (I)
 - "Adenocaulon bicolor" (N)
 - "Adiantum capillus-veneris" (N)
 - "Adiantum pedatum" (N)
 - "Adlumia fungosa" (N)
 - "Aegilops cylindrica" (I)
 - "Aegopodium podagraria" (I)
 - "Aesculus flava" (N)
 - "Aesculus glabra" var. "glabra" (N)
 - "Aesculus hippocastanum" (I)
 - "Aesculus × marylandica" (N)
 - "Aethusa cynapium" (I)
 - "Agalinis auriculata" (N)
 - "Agalinis gattingeri" (N)
 - "Agalinis paupercula" var. "borealis" (N)
 - "Agalinis paupercula" var. "paupercula" (N)
 - "Agalinis purpurea" (N)
 - "Agalinis skinneriana" (N)
 - "Agalinis tenuifolia" var. "macrophylla" (N)
 - "Agalinis tenuifolia" var. "parviflora" (N)
 - "Agalinis tenuifolia" var. "tenuifolia" (N)
 - "Agastache nepetoides" (N)
 - "Agastache scrophulariifolia" (N)
 - "Ageratina altissima" var. "altissima" (N)
 - "Ageratina aromatica" var. "aromatica" (N)
 - "Agrimonia eupatoria" (I)
 - "Agrimonia gryposepala" (N)
 - "Agrimonia microcarpa" (N)
 - "Agrimonia parviflora" (N)
 - "Agrimonia pubescens" (N)
 - "Agrimonia rostellata" (N)
 - "Agrimonia striata" (N)
 - "Agropyron desertorum" (I)
 - "Agrostemma githago" (I)
 - "Agrostis avenacea" (I)
 - "Agrostis capillaris" (I)
 - "Agrostis elliottiana" (N)
 - "Agrostis gigantea" (I)
 - "Agrostis hyemalis" (N)
 - "Agrostis perennans" (N)
 - "Agrostis scabra" (N)
 - "Agrostis stolonifera" (I)
 - "Ailanthus altissima" (I)
 - "Aira caryophyllea" var. "caryophyllea" (I)
 - "Ajuga genevensis" (I)
 - "Ajuga reptans" (I)
 - "Akebia quinata" (I)
 - "Albizia julibrissin" (I)
 - "Alcea rosea" (I)
 - "Aletris farinosa" (N)
 - "Alisma subcordatum" (N)
 - "Alisma triviale" (N)
 - "Alliaria petiolata" (I)
 - "Allium ampeloprasum" (I)
 - "Allium burdickii" (N)
 - "Allium canadense" var. "canadense" (N)
 - "Allium cepa" (I)
 - "Allium cernuum" var. "cernuum" (N)
 - "Allium porrum" (I)
 - "Allium sativum" (I)
 - "Allium schoenoprasum" (I)
 - "Allium schoenoprasum" var. "sibiricum" (N)
 - "Allium tricoccum" (N)
 - "Allium vineale" ssp. "vineale" (I)
 - "Alnus × fallacina" (N)
 - "Alnus glutinosa" (I)
 - "Alnus incana" ssp. "rugosa" (N)
 - "Alnus serrulata" (N)
 - "Alopecurus aequalis" var. "aequalis" (N)
 - "Alopecurus carolinianus" (N)
 - "Alopecurus geniculatus" var. "geniculatus" (I)
 - "Alopecurus myosuroides" (I)
 - "Alopecurus myosuroides" (N)
 - "Alopecurus pratensis" (I)
 - "Althaea officinalis" (I)
 - "Alyssum alyssoides" (I)
 - "Amaranthus albus" (I)
 - "Amaranthus blitoides" (I)
 - "Amaranthus blitum" var. "emarginatus" (I)
 - "Amaranthus cruentus" (I)
 - "Amaranthus deflexus" (I)
 - "Amaranthus hybridus" (N)
 - "Amaranthus palmeri" (N)
 - "Amaranthus powellii" ssp. "powellii" (N)
 - "Amaranthus retroflexus" (N)
 - "Amaranthus spinosus" (N)
 - "Amaranthus tuberculatus" (N)
 - "Ambrosia artemisiifolia" var. "elatior" (N)
 - "Ambrosia artemisiifolia" var. "elatior" (I)
 - "Ambrosia bidentata" (N)
 - "Ambrosia × helenae" (N)
 - "Ambrosia trifida" var. "trifida" (N)
 - "Amelanchier arborea" var. "arborea" (N)
 - "Amelanchier interior" (N)
 - "Amelanchier laevis" (N)
 - "Amelanchier sanguinea" var. "sanguinea" (N)
 - "Amelanchier stolonifera" (N)
 - "Ammannia coccinea" (N)
 - "Ammannia robusta" (N)
 - "Ammophila breviligulata" (N)
 - "Amorpha fruticosa" (N)
 - "Ampelopsis aconitifolia" (I)
 - "Ampelopsis arborea" (N)
 - "Ampelopsis glandulosa" var. "brevipedunculata" (I)
 - "Ampelopsis cordata" (N)
 - "Amphiachyris dracunculoides" (N)
 - "Amphicarpaea bracteata" var. "bracteata" (N)
 - "Amphicarpaea bracteata" var. "comosa" (N)
 - "Amsinckia lycopsoides" (N)
 - "Amsonia tabernaemontana" var. "salicifolia" (N)
 - "Anagallis arvensis" ssp. "foemina" (N)
 - "Anagallis arvensis" ssp. "arvensis" (I)
 - "Anagallis arvensis" ssp. "foemina" (I)
 - "Anagallis minima" (N)
 - "Anaphalis margaritacea" (N)
 - "Anchusa arvensis" (I)
 - "Anchusa azurea" (I)
 - "Anchusa officinalis" (I)
 - "Andromeda polifolia" var. "glaucophylla" (N)
 - "Andropogon gerardi" (N)
 - "Andropogon glomeratus" var. "glomeratus" (N)
 - "Andropogon gyrans" var. "gyrans" (N)
 - "Andropogon virginicus" var. "virginicus" (N)
 - "Androsace occidentalis" (N)
 - "Anemone blanda" (I)
 - "Anemone canadensis" (N)
 - "Anemone cylindrica" (N)
 - "Anemone quinquefolia" var. "bifolia" (N)
 - "Anemone quinquefolia" var. "quinquefolia" (N)
 - "Anemone virginiana" var. "virginiana" (N)
 - "Anethum graveolens" (I)
 - "Angelica atropurpurea" (N)
 - "Angelica venenosa" (N)
 - "Anoda cristata" (N)
 - "Antennaria howellii" ssp. "canadensis" (N)
 - "Antennaria howellii" ssp. "neodioica" (N)
 - "Antennaria howellii" ssp. "petaloidea" (N)
 - "Antennaria neglecta" (N)
 - "Antennaria parlinii" ssp. "fallax" (N)
 - "Antennaria parlinii" ssp. "parlinii" (N)
 - "Antennaria plantaginifolia" (N)
 - "Antennaria solitaria" (N)
 - "Antennaria virginica" (N)
 - "Anthemis arvensis" (I)
 - "Anthemis cotula" (I)
 - "Anthemis tinctoria" (I)
 - "Anthoxanthum aristatum" (I)
 - "Anthoxanthum odoratum" ssp. "odoratum" (I)
 - "Anthriscus caucalis" (I)
 - "Anthriscus sylvestris" (I)
 - "Anthyllis vulneraria" (I)
 - "Antirrhinum majus" (I)
 - "Apera interrupta" (I)
 - "Apera spica-venti" (I)
 - "Apios americana" (N)
 - "Apium graveolens" var. "dulce" (N)
 - "Apium graveolens" var. "dulce" (I)
 - "Aplectrum hyemale" (N)
 - "Apocynum androsaemifolium" (N)
 - "Apocynum cannabinum" (N)
 - "Apocynum × floribundum" (N)
 - "Aquilegia canadensis" (N)
 - "Aquilegia vulgaris" (I)
 - "Arabidopsis thaliana" (I)
 - "Arabis canadensis" (N)
 - "Arabis × divaricarpa" (N)
 - "Arabis drummondii" (N)
 - "Arabis glabra" (N)
 - "Arabis hirsuta" var. "pycnocarpa" (N)
 - "Arabis laevigata" var. "laevigata" (N)
 - "Arabis lyrata" (N)
 - "Arabis missouriensis" (N)
 - "Arabis patens" (N)
 - "Arabis shortii" (N)
 - "Aralia elata" (I)
 - "Aralia hispida" (N)
 - "Aralia nudicaulis" (N)
 - "Aralia racemosa" ssp. "racemosa" (N)
 - "Aralia spinosa" (N)
 - "Arctium lappa" (I)
 - "Arctium minus" (I)
 - "Arctostaphylos uva-ursi" (N)
 - "Arenaria serpyllifolia" (I)
 - "Arethusa bulbosa" (N)
 - "Argemone albiflora" ssp. "albiflora" (N)
 - "Argemone mexicana" (N)
 - "Argentina anserina" (N)
 - "Arisaema dracontium" (N)
 - "Arisaema triphyllum" ssp. "pusillum" (N)
 - "Arisaema triphyllum" ssp. "stewardsonii" (N)
 - "Arisaema triphyllum" ssp. "triphyllum" (N)
 - "Aristida dichotoma" var. "dichotoma" (N)
 - "Aristida longespica" var. "geniculata" (N)
 - "Aristida longespica" var. "longespica" (N)
 - "Aristida oligantha" (N)
 - "Aristida purpurascens" var. "purpurascens" (N)
 - "Aristida ramosissima" (N)
 - "Aristolochia clematitis" (I)
 - "Aristolochia serpentaria" (N)
 - "Aristolochia tomentosa" (N)
 - "Armoracia rusticana" (I)
 - "Arnoglossum atriplicifolium" (N)
 - "Arnoglossum plantagineum" (N)
 - "Arnoglossum reniforme" (N)
 - "Arnoseris minima" (I)
 - "Arrhenatherum elatius" var. "elatius" (I)
 - "Artemisia absinthium" (I)
 - "Artemisia annua" (I)
 - "Artemisia biennis" (N)
 - "Artemisia biennis" var. "biennis" (I)
 - "Artemisia campestris" ssp. "borealis" var. "borealis" (N)
 - "Artemisia campestris" ssp. "caudata" (N)
 - "Artemisia gmelinii" (I)
 - "Artemisia ludoviciana" ssp. "albula" (N)
 - "Artemisia ludoviciana" ssp. "ludoviciana" (N)
 - "Artemisia pontica" (I)
 - "Artemisia stelleriana" (I)
 - "Artemisia stelleriana" (N)
 - "Artemisia vulgaris" (N)
 - "Artemisia vulgaris" var. "vulgaris" (I)
 - "Arthraxon hispidus" (I)
 - "Aruncus dioicus" (I)
 - "Aruncus dioicus" var. "dioicus" (N)
 - "Arundinaria gigantea" ssp. "gigantea" (N)
 - "Asarum canadense" (N)
 - "Asclepias amplexicaulis" (N)
 - "Asclepias exaltata" (N)
 - "Asclepias hirtella" (N)
 - "Asclepias incarnata" ssp. "incarnata" (N)
 - "Asclepias purpurascens" (N)
 - "Asclepias quadrifolia" (N)
 - "Asclepias sullivantii" (N)
 - "Asclepias syriaca" (N)
 - "Asclepias tuberosa" ssp. "interior" (N)
 - "Asclepias tuberosa" ssp. "tuberosa" (N)
 - "Asclepias variegata" (N)
 - "Asclepias verticillata" (N)
 - "Asclepias viridiflora" (N)
 - "Asclepias viridis" (N)
 - "Asimina triloba" (N)
 - "Asparagus officinalis" (I)
 - "Asperugo procumbens" (I)
 - "Asplenium bradleyi" (N)
 - "Asplenium × clermontiae" (N)
 - "Asplenium × ebenoides" (N)
 - "Asplenium × gravesii" (N)
 - "Asplenium × inexpectatum" (N)
 - "Asplenium × kentuckiense" (N)
 - "Asplenium montanum" (N)
 - "Asplenium pinnatifidum" (N)
 - "Asplenium platyneuron" var. "platyneuron" (N)
 - "Asplenium resiliens" (N)
 - "Asplenium rhizophyllum" (N)
 - "Asplenium ruta-muraria" var. "cryptolepis" (N)
 - "Asplenium ruta-muraria" var. "lanceolum" (N)
 - "Asplenium trichomanes" ssp. "quadrivalens" (N)
 - "Asplenium trichomanes" ssp. "trichomanes" (N)
 - "Asplenium × trudellii" (N)
 - "Aster tataricus" (I)
 - "Astragalus canadensis" var. "canadensis" (N)
 - "Astragalus neglectus" (N)
 - "Athyrium filix-femina" ssp. "angustum" (N)
 - "Athyrium filix-femina" ssp. "asplenioides" (N)
 - "Atriplex hortensis" (I)
 - "Atriplex patula" (I)
 - "Atriplex prostrata" (N)
 - "Atriplex rosea" (I)
 - "Aureolaria flava" var. "flava" (N)
 - "Aureolaria flava" var. "macrantha" (N)
 - "Aureolaria levigata" (N)
 - "Aureolaria pedicularia" var. "ambigens" (N)
 - "Aureolaria pedicularia" var. "pedicularia" (N)
 - "Aureolaria virginica" (N)
 - "Aurinia saxatilis" (I)
 - "Avena fatua" (I)
 - "Avena sativa" (I)
 - "Azolla caroliniana" (N)


## B.
 - "Ballota nigra" var. "alba" (I)
 - "Baptisia alba" var. "macrophylla" (N)
 - "Baptisia australis" var. "australis" (N)
 - "Baptisia tinctoria" (N)
 - "Barbarea verna" (I)
 - "Barbarea vulgaris" (I)
 - "Bartonia virginica" (N)
 - "Bassia hirsuta" (I)
 - "Bassia scoparia" (I)
 - "Beckmannia syzigachne" (N)
 - "Belamcanda chinensis" (I)
 - "Bellis perennis" (I)
 - "Berberis canadensis" (N)
 - "Berberis × ottawensis" (N)
 - "Berberis thunbergii" (I)
 - "Berberis vulgaris" (I)
 - "Berteroa incana" (I)
 - "Besseya bullii" (N)
 - "Betula alleghaniensis" var. "alleghaniensis" (N)
 - "Betula alleghaniensis" var. "macrolepis" (N)
 - "Betula lenta" (N)
 - "Betula nigra" (N)
 - "Betula papyrifera" var. "papyrifera" (N)
 - "Betula pendula" (I)
 - "Betula populifolia" (N)
 - "Betula pubescens" (N)
 - "Betula pubescens" ssp. "pubescens" (I)
 - "Betula pumila" var. "pumila" (N)
 - "Betula × purpusii" (N)
 - "Bidens aristosa" (N)
 - "Bidens beckii" (N)
 - "Bidens bipinnata" (N)
 - "Bidens cernua" (N)
 - "Bidens connata" (N)
 - "Bidens coronata" (N)
 - "Bidens discoidea" (N)
 - "Bidens frondosa" (N)
 - "Bidens laevis" (N)
 - "Bidens tripartita" (N)
 - "Bidens vulgata" (N)
 - "Bignonia capreolata" (N)
 - "Blephilia ciliata" (N)
 - "Blephilia hirsuta" var. "hirsuta" (N)
 - "Boehmeria cylindrica" (N)
 - "Boltonia asteroides" var. "recognita" (N)
 - "Borago officinalis" (I)
 - "Botrychium biternatum" (N)
 - "Botrychium dissectum" (N)
 - "Botrychium lanceolatum" var. "angustisegmentum" (N)
 - "Botrychium matricariifolium" (N)
 - "Botrychium multifidum" (N)
 - "Botrychium oneidense" (N)
 - "Botrychium simplex" (N)
 - "Botrychium virginianum" (N)
 - "Bouteloua curtipendula" var. "curtipendula" (N)
 - "Bouteloua gracilis" (N)
 - "Bouteloua hirsuta" var. "hirsuta" (N)
 - "Brachyelytrum erectum" (N)
 - "Brasenia schreberi" (N)
 - "Brassica juncea" (I)
 - "Brassica napus" (I)
 - "Brassica nigra" (I)
 - "Brassica oleracea" (I)
 - "Brassica rapa" var. "amplexicaulis" (I)
 - "Brassica rapa" var. "rapa" (I)
 - "Brickellia eupatorioides" var. "corymbulosa" (N)
 - "Brickellia eupatorioides" var. "eupatorioides" (N)
 - "Bromus arvensis" (I)
 - "Bromus briziformis" (I)
 - "Bromus catharticus" (I)
 - "Bromus ciliatus" var. "ciliatus" (N)
 - "Bromus erectus" (I)
 - "Bromus hordeaceus" ssp. "hordeaceus" (I)
 - "Bromus inermis" (N)
 - "Bromus inermis" ssp. "inermis" var. "inermis" (I)
 - "Bromus kalmii" (N)
 - "Bromus latiglumis" (N)
 - "Bromus nottowayanus" (N)
 - "Bromus pubescens" (N)
 - "Bromus racemosus" (I)
 - "Bromus secalinus" var. "secalinus" (I)
 - "Bromus sterilis" (I)
 - "Bromus tectorum" (I)
 - "Broussonetia papyrifera" (I)
 - "Browallia americana" (I)
 - "Brunnera macrophylla" (I)
 - "Buchnera americana" (N)
 - "Buddleja davidii" (I)
 - "Buglossoides arvensis" (I)
 - "Bulbostylis capillaris" ssp. "capillaris" (N)
 - "Bunias orientalis" (I)
 - "Bupleurum lancifolium" (I)
 - "Bupleurum rotundifolium" (I)
 - "Butomus umbellatus" (I)
 - "Buxus sempervirens" (I)


## C.
 - "Cabomba caroliniana" var. "caroliniana" (N)
 - "Cakile edentula" ssp. "edentula" var. "lacustris" (N)
 - "Cakile edentula" ssp. "edentula" (N)
 - "Calamagrostis canadensis" var. "canadensis" (N)
 - "Calamagrostis canadensis" var. "macouniana" (N)
 - "Calamagrostis coarctata" (N)
 - "Calamagrostis porteri" ssp. "insperata" (N)
 - "Calamagrostis stricta" ssp. "inexpansa" (N)
 - "Calamovilfa longifolia" var. "magna" (N)
 - "Calendula officinalis" (I)
 - "Calla palustris" (N)
 - "Callitriche heterophylla" ssp. "heterophylla" (N)
 - "Callitriche palustris" (N)
 - "Callitriche terrestris" (N)
 - "Calluna vulgaris" (I)
 - "Calopogon tuberosus" var. "tuberosus" (N)
 - "Caltha palustris" var. "palustris" (N)
 - "Calycanthus floridus" var. "glaucus" (N)
 - "Calystegia hederacea" (I)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "Conium maculatum" (I)
 - "Conoclinium coelestinum" (N)
 - "Conopholis americana" (N)
 - "Conringia orientalis" (I)
 - "Consolida ajacis" (I)
 - "Consolida regalis" (I)
 - "Convallaria majalis" (I)
 - "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)
 - "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)
 - "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)
 - "Cucumis melo" (I)
 - "Cucumis sativus" (I)
 - "Cucurbita foetidissima" (N)
 - "Cucurbita maxima" (I)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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 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)
 - "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)
 - "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)
 - "Foeniculum vulgare" (I)
 - "Fontanesia phillyreoides" ssp. "fortunei" (I)
 - "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)
 - "Frangula alnus" (I)
 - "Frangula alnus" (N)
 - "Frangula caroliniana" (N)
 - "Frasera caroliniensis" (N)
 - "Fraxinus americana" (N)
 - "Fraxinus excelsior" (I)
 - "Fraxinus nigra" (N)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "Hibiscus syriacus" (I)
 - "Hibiscus trionum" (I)
 - "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)
 - "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)
 - "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)
 - "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)
 - "Ledum groenlandicum" (N)
 - "Leersia lenticularis" (N)
 - "Leersia oryzoides" (N)
 - "Leersia virginica" (N)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "Narcissus jonquilla" (I)
 - "Narcissus × medioluteus" (I)
 - "Narcissus poeticus" (I)
 - "Narcissus pseudonarcissus" (I)
 - "Nasturtium officinale" (I)
 - "Navarretia intertexta" ssp. "propinqua" (N)
 - "Nelumbo lutea" (N)
 - "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)
 - "Papaver rhoeas" (I)
 - "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)
 - "Parthenocissus quinquefolia" (N)
 - "Parthenocissus tricuspidata" (I)
 - "Parthenocissus vitacea" (N)
 - "Pascopyrum smithii" (N)
 - "Paspalum floridanum" (N)
 - "Paspalum fluitans" (N)
 - "Paspalum laeve" (N)
 - "Paspalum pubiflorum" (N)
 - "Paspalum setaceum" (N)
 - "Passiflora incarnata" (N)
 - "Passiflora lutea" (N)
 - "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)
 - "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)
 - "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)
 - "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)
 - "Pinus banksiana" (N)
 - "Pinus echinata" (N)
 - "Pinus nigra" (I)
 - "Pinus rigida" (N)
 - "Pinus strobus" (N)
 - "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)
 - "Plantago lanceolata" (I)
 - "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)
 - "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" (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)
 - "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)
 - "Populus nigra" (I)
 - "Populus × smithii" (N)
 - "Populus tremuloides" (N)
 - "Portulaca grandiflora" (I)
 - "Portulaca oleracea" (I)
 - "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)
 - "Prunus cerasifera" (I)
 - "Prunus cerasus" (I)
 - "Prunus domestica" var. "domestica" (I)
 - "Prunus hortulana" (N)
 - "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 "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.
 - "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)
 - "Quercus palustris" (N)
 - "Quercus prinus" (N)
 - "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)
 - "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 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)
 - "Ribes nigrum" (I)
 - "Ribes oxyacanthoides" ssp. "oxyacanthoides" (N)
 - "Ribes rotundifolium" (N)
 - "Ribes rubrum" (I)
 - "Ribes triste" (N)
 - "Ribes uva-crispa" var. "sativum" (I)
 - "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)
 - "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" (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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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)
 - "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 hispidula" (N)
 - "Syringa vulgaris" (I)


## T.
 - "Taenidia integerrima" (N)
 - "Tagetes erecta" (I)
 - "Tagetes patula" (I)
 - "Tamarix chinensis" (I)
 - "Tanacetum balsamita" (I)
 - "Tanacetum coccineum" (I)
 - "Tanacetum parthenium" (I)
 - "Tanacetum vulgare" (I)
 - "Taraxacum laevigatum" (I)
 - "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)
 - "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)
 - "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)
 - "Triticum aestivum" (I)
 - "Trollius laxus" ssp. "laxus" (N)
 - "Tsuga canadensis" (N)
 - "Tulipa gesneriana" (I)
 - "Tussilago farfara" (I)
 - "Typha angustifolia" (I)
 - "Typha angustifolia" (N)
 - "Typha × glauca" (N)
 - "Typha latifolia" (N)


## U.
 - "Ulmus americana" (N)
 - "Ulmus procera" (I)
 - "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)
 - "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)
 - "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)
 - "Vigna unguiculata" (I)
 - "Vinca major" (I)
 - "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)
 - "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)