User:DCDuring/NativePlantsofNYCRegion

This includes information from a variety of sources, including A Guide to Native Plants of the New York City Region (Margaret Gargiullo) and the USDA Plants Database.

=A=
 * Species native to Westchester
 * Abies
 * Abies balsamea
 * Abies magnifica
 * Acalypha
 * - G
 * - G
 * Acalypha virginica
 * Acer
 * Acer × freemanii
 * Acer negundo - G
 * Acer nigrum
 * Acer pensylvanicum - G
 * Acer rubrum - G
 * Acer saccharinum - G
 * Acer saccharum - G
 * - G
 * Achillea
 * Achillea millefolium
 * Aconitum
 * Aconitum noveboracense
 * Acorus
 * Acorus americanus
 * Actaea
 * Actaea × ludovici
 * Actaea pachypoda
 * Actaea racemosa
 * - G
 * Adiantum
 * - G
 * Adlumia
 * Adoxa
 * Adoxa moschatellina
 * Aesculus
 * Aesculus flava
 * Aesculus glabra
 * Aesculus parviflora
 * Agalinis
 * Agalinis acuta
 * Agalinis fasciculata
 * Agalinis maritima
 * Agalinis paupercula
 * Agalinis purpurea
 * Agalinis setacea
 * Agalinis tenuifolia
 * Agastache
 * Agastache foeniculum
 * Agastache nepetoides - G
 * Agastache scrophulariifolia - G
 * Ageratina altissima
 * Ageratina aromatica
 * Agrimonia
 * Agrimonia gryposepala - G
 * Agrimonia parviflora
 * Agrimonia pubescens - G
 * Agrimonia rostellata
 * Agrimonia striata
 * Agrostis
 * Agrostis canina
 * Agrostis hyemalis - G
 * Agrostis mertensii
 * Agrostis perennans - G
 * Agrostis scabra
 * Aletris
 * Aletris farinosa - G
 * Alisma
 * Alisma gramineum
 * Alisma subcordatum - G
 * Alisma triviale - G
 * Allium
 * Allium burdickii
 * Allium canadense - G
 * Allium cernuum
 * Allium schoenoprasum
 * Allium tricoccum - G
 * Alnus
 * Alnus × fallacina
 * Alnus incana - G
 * Alnus serrulata - G
 * Alnus viridis
 * Alopecurus
 * Alopecurus aequalis - G
 * Alopecurus carolinianus
 * Amaranthus
 * Amaranthus cannabinus - G
 * Amaranthus hybridus
 * Amaranthus palmeri
 * Amaranthus powellii
 * Amaranthus pumilus
 * Amaranthus retroflexus
 * Amaranthus spinosus
 * Amaranthus tuberculatus
 * Amaranthus viridis
 * Ambrosia
 * Ambrosia artemisiifolia - G
 * Ambrosia bidentata
 * Ambrosia × helenae
 * Ambrosia psilostachya
 * Ambrosia trifida - G
 * Amelanchier
 * Amelanchier arborea - G
 * Amelanchier bartramiana
 * Amelanchier canadensis - G
 * Amelanchier humilis
 * Amelanchier interior
 * Amelanchier × intermedia
 * Amelanchier laevis
 * Amelanchier nantucketensis
 * Amelanchier × neglecta
 * Amelanchier obovalis
 * Amelanchier sanguinea
 * Amelanchier stolonifera - G
 * Amerorchis
 * Amerorchis rotundifolia
 * Amianthium
 * Amianthium muscitoxicum - G
 * Ammophila
 * Ammophila breviligulata - G
 * Ammophila champlainensis
 * Amorpha
 * Amorpha fruticosa
 * Amphicarpaea bracteata - G
 * Amphicarpum purshii
 * Amsinckia
 * Amsinckia lycopsoides
 * Amsinckia menziesii
 * Amsonia tabernaemontana
 * Anagallis
 * Anagallis minima
 * Anaphalis
 * Anaphalis margaritacea - G
 * Anrodmeda
 * Andromeda polifolia
 * Andropogon
 * Andropogon gerardii - G
 * Andropogon glomeratus
 * Andropogon virginicus - G
 * Anemone
 * Anemone canadensis - G
 * Anemone cylindrica - G
 * Anemone multifida
 * Anemone quinquefolia - G
 * Anemone virginiana - G
 * Angelica
 * Angelica atropurpurea - G
 * Angelica lucida
 * Angelica venenosa - G
 * Anoda
 * Anoda cristata
 * Antennaria
 * Antennaria howellii
 * Antennaria neglecta - G
 * Antennaria parlinii
 * Antennaria plantaginifolia - G
 * Anthoxanthum
 * Anthoxanthum monticola
 * Apios
 * Apios americana - G
 * Aplectum
 * Aplectrum hyemale
 * Apocynum
 * Apocynum androsaemifolium - G
 * Apocynum cannabinum - G
 * Apocynum × floribundum
 * Aquilegia
 * Aquilegia canadensis - G
 * Arabis
 * Arabis alpina
 * Arabis canadensis - G
 * Arabis × divaricarpa
 * Arabis drummondii
 * Arabis glabra
 * Arabis hirsuta - G
 * Arabis laevigata - G
 * Arabis lyrata - G
 * Arabis missouriensis
 * Arabis shortii
 * Aralia
 * Aralia hispida - G
 * Aralia nudicaulis - G
 * Aralia racemosa - G
 * Aralia spinosa
 * Arceuthobium
 * Arceuthobium pusillum
 * Arctostaphylos
 * Arctostaphylos uva-ursi - G
 * Arethusa
 * Arethusa bulbosa
 * Argemone
 * Argemone albiflora
 * Argemone mexicana
 * Argentina
 * Argentina anserina
 * Argentina egedii
 * Arisaema
 * Arisaema dracontium
 * Arisaema triphyllum - G
 * Aristida
 * Aristida adscensionis
 * Aristida basiramea
 * Aristida dichotoma - G
 * Aristida longespica - G
 * Aristida oligantha
 * Aristida purpurascens - G
 * Aristida tuberculosa - G
 * Aristolochia
 * Aristolochia macrophylla
 * Aristolochia serpentaria - G
 * Aristolochia tomentosa
 * Arnica
 * Arnica lanceolata
 * Arnoglossum
 * Arnoglossum atriplicifolium
 * Aronia
 * Aronia arbutifolia - G
 * - G
 * - G
 * Artemisia
 * Artemisia biennis
 * Artemisia campestris
 * Artemisia carruthii
 * Artemisia dracunculus
 * Artemisia filifolia
 * Artemisia frigida
 * Artemisia ludoviciana
 * Artemisia serrata
 * Artemisia tripartita
 * Aruncus dioicus
 * Arundinaria
 * Arundinaria tecta
 * Asarum
 * Asarum canadense - G
 * Asclepias
 * - G
 * - G
 * Asclepias incarnata - G
 * - G
 * - G
 * - G
 * - G
 * Asclepias tuberosa - G
 * - G
 * - G
 * Asclepias viridiflora - G
 * Asimina
 * Asimina triloba
 * Asplenium
 * Asplenium bradleyi
 * Asplenium × ebenoides
 * Asplenium montanum
 * - G
 * - G
 * Asplenium ruta-muraria
 * Asplenium scolopendrium
 * - G
 * Asplenium trichomanes-ramosum
 * Astragalus
 * - G
 * Astragalus neglectus
 * - G
 * Atriplex
 * Atriplex cristata
 * Atriplex glabriuscula
 * Atriplex joaquinana
 * Atriplex prostrata
 * Atriplex subspicata
 * Aureolaria flava
 * Aureolaria pedicularia
 * Aureolaria virginica
 * Azolla
 * Azolla caroliniana
 * Azolla filiculoides
 * Aureolaria flava
 * Aureolaria pedicularia
 * Aureolaria virginica
 * Azolla
 * Azolla caroliniana
 * Azolla filiculoides
 * Azolla filiculoides

=B=
 * Baccharis halimifolia
 * Baptisia
 * Baptisia alba
 * Baptisia australis
 * Baptisia tinctoria
 * Bartonia
 * Bartonia paniculata
 * Bartonia virginica
 * Beckmannia
 * Beckmannia syzigachne
 * Berula
 * Berula erecta
 * Betula
 * Betula alleghaniensis - G
 * Betula × caerulea
 * Betula glandulosa
 * Betula lenta - G
 * Betula minor
 * Betula nana
 * Betula nigra - G
 * Betula papyrifera - G
 * Betula populifolia - G
 * Betula pumila
 * Betula × purpusii
 * Bidens
 * Bidens aristosa
 * Bidens beckii
 * Bidens bidentoides
 * Bidens bipinnata
 * Bidens cernua
 * Bidens connata
 * Bidens coronata
 * Bidens discoidea
 * Bidens eatonii
 * Bidens frondosa
 * Bidens hyperborea
 * Bidens laevis
 * Bidens tenuisecta
 * Bidens tripartita
 * Bidens vulgata
 * Blephilia
 * Blephilia ciliata
 * Blephilia hirsuta
 * Boehmeria
 * Boehmeria cylindrica
 * Bolboschoenus
 * Bolboschoenus fluviatilis
 * Bolboschoenus maritimus
 * Bolboschoenus novae-angliae
 * Bolboschoenus robustus
 * Boltonia
 * Boltonia asteroides
 * Botrychium
 * Botrychium campestre
 * Botrychium dissectum
 * Botrychium lanceolatum
 * Botrychium lunaria
 * Botrychium matricariifolium
 * Botrychium minganense
 * Botrychium multifidum
 * Botrychium oneidense
 * Botrychium rugulosum
 * Botrychium simplex
 * Botrychium virginianum
 * Bouteloua
 * Bouteloua curtipendula
 * Bouteloua gracilis
 * Bouteloua hirsuta
 * Brachyelytrum
 * Brachyelytrum aristosum
 * Brachyelytrum erectum
 * Brasenia
 * Brasenia schreberi
 * Bromus
 * Bromus ciliatus
 * Bromus inermis
 * Bromus kalmii
 * Bromus latiglumis
 * Bromus marginatus
 * Bromus nottowayanus
 * Bromus pubescens
 * Buchnera
 * Buchnera americana
 * Bulbostylis
 * Bulbostylis capillaris

=C=
 * Cabomba caroliniana
 * Cakile edentula
 * Calamagrostis
 * Calamagrostis canadensis
 * Calamagrostis coarctata
 * Calamagrostis perplexa
 * Calamagrostis pickeringii
 * Calamagrostis porteri
 * Calamagrostis stricta
 * Calamovilfa longifolia
 * Calla palustris
 * Callitriche
 * Callitriche hermaphroditica
 * Callitriche heterophylla
 * Callitriche palustris
 * Callitriche terrestris
 * Calopogon tuberosus
 * Caltha palustris
 * Calycanthus floridus
 * Calypso bulbosa
 * Calystegia
 * Calystegia sepium
 * Calystegia silvatica
 * Calystegia spithamaea
 * Campanula aparinoides
 * Campanula rotundifolia
 * Campanulastrum americanum
 * Campsis radicans
 * Capsicum annuum
 * Cardamine
 * Cardamine × anomala
 * Cardamine bulbosa
 * Cardamine concatenata
 * Cardamine diphylla
 * Cardamine douglassii
 * Cardamine × incisa
 * Cardamine longii
 * Cardamine maxima
 * Cardamine oligosperma
 * Cardamine parviflora
 * Cardamine pensylvanica
 * Cardamine pratensis
 * Cardamine rotundifolia

Carex

 * Carex
 * Carex abscondita
 * Carex × aestivaliformis
 * Carex aestivalis
 * Carex aggregata
 * Carex alata
 * Carex albicans
 * Carex albolutescens
 * Carex albursina
 * Carex alopecoidea
 * Carex amphibola
 * Carex annectens
 * Carex appalachica
 * Carex aquatilis
 * Carex arcta
 * Carex arctata
 * Carex argyrantha
 * Carex atherodes
 * Carex atlantica
 * Carex atratiformis
 * Carex aurea
 * Carex backii
 * Carex baileyi
 * Carex barrattii
 * Carex bebbii
 * Carex bicknellii
 * Carex bigelowii
 * Carex billingsii
 * Carex blanda
 * Carex brevior
 * Carex bromoides
 * Carex brunnescens
 * Carex bullata
 * Carex bushii
 * Carex buxbaumii
 * Carex canescens
 * Carex capillaris
 * Carex careyana
 * Carex caroliniana
 * Carex castanea
 * Carex cephaloidea
 * Carex cephalophora
 * Carex chordorrhiza
 * Carex collinsii
 * Carex communis
 * Carex comosa
 * Carex conjuncta
 * Carex conoidea
 * Carex crawei
 * Carex crawfordii
 * Carex crinita
 * Carex cristatella
 * Carex cryptolepis
 * Carex cumulata
 * Carex davisii
 * Carex debilis
 * Carex decomposita
 * Carex deflexa
 * Carex deweyana
 * Carex diandra
 * Carex digitalis
 * Carex disperma
 * Carex eburnea
 * Carex echinata
 * Carex emoryi
 * Carex exilis
 * Carex festucacea
 * Carex flaccosperma
 * Carex flava
 * Carex folliculata
 * Carex formosa
 * Carex frankii
 * Carex garberi
 * Carex glaucodea
 * Carex gracilescens
 * Carex gracillima
 * Carex granularis
 * Carex gravida
 * Carex grayi
 * Carex grisea
 * Carex gynandra
 * Carex gynocrates
 * Carex haydenii
 * Carex hirsutella
 * Carex hirtifolia
 * Carex hitchcockiana
 * Carex hormathodes
 * Carex houghtoniana
 * Carex hyalinolepis
 * Carex hystericina
 * Carex interior
 * Carex intumescens
 * Carex jamesii
 * Carex × knieskernii
 * Carex lacustris
 * Carex laevivaginata
 * Carex lapponica
 * Carex lasiocarpa
 * Carex laxiculmis
 * Carex laxiflora
 * Carex leavenworthii
 * Carex lenticularis
 * Carex leptalea
 * Carex leptonervia
 * Carex limosa
 * Carex livida
 * Carex longii
 * Carex lucorum
 * Carex lupuliformis
 * Carex lupulina
 * Carex lurida
 * Carex magellanica
 * Carex meadii
 * Carex merritt-fernaldii
 * Carex mesochorea
 * Carex michauxiana
 * Carex mitchelliana
 * Carex molesta
 * Carex muehlenbergii
 * Carex nigra
 * Carex nigromarginata
 * Carex normalis
 * Carex novae-angliae
 * Carex oligocarpa
 * Carex oligosperma
 * Carex ormostachya
 * Carex ovalis
 * Carex pallescens
 * Carex pauciflora
 * Carex peckii
 * Carex pedunculata
 * Carex pellita
 * Carex pensylvanica
 * Carex plantaginea
 * Carex platyphylla
 * Carex polymorpha
 * Carex praegracilis
 * Carex prairea
 * Carex prasina
 * Carex projecta
 * Carex pseudocyperus
 * Carex radiata
 * Carex retroflexa
 * Carex retrorsa
 * Carex reznicekii
 * Carex richardsonii
 * Carex rosea
 * Carex rostrata
 * Carex sartwellii
 * Carex scabrata
 * Carex schweinitzii
 * Carex scirpoidea
 * Carex scoparia
 * Carex seorsa
 * Carex shortiana
 * Carex siccata
 * Carex silicea
 * Carex sparganioides
 * Carex sprengelii
 * Carex squarrosa
 * Carex sterilis
 * Carex stipata
 * Carex straminea
 * Carex striata
 * Carex striatula
 * Carex stricta
 * Carex styloflexa
 * Carex sullivantii
 * Carex swanii
 * Carex sychnocephala
 * Carex tenera
 * Carex tenuiflora
 * Carex tetanica
 * Carex texensis
 * Carex tincta
 * Carex tonsa
 * Carex torta
 * Carex tribuloides
 * Carex trichocarpa
 * Carex trisperma
 * Carex tuckermanii
 * Carex typhina
 * Carex umbellata
 * Carex utriculata
 * Carex vaginata
 * Carex venusta
 * Carex vesicaria
 * Carex vestita
 * Carex virescens
 * Carex viridula
 * Carex vulpinoidea
 * Carex wiegandii
 * Carex willdenowii
 * Carex woodii
 * Carpinus caroliniana - G
 * Carya
 * Carya cordiformis - G
 * Carya × dunbarii
 * Carya glabra - G
 * Carya laciniosa
 * Carya × laneyi
 * Carya ovalis - G
 * Carya ovata - G
 * Carya tomentosa - G
 * Castanea dentata
 * Castanea pumila
 * Castilleja coccinea
 * Catalpa bignonioides
 * Catalpa speciosa
 * Caulophyllum giganteum
 * Caulophyllum thalictroides
 * Ceanothus americanus
 * Ceanothus herbaceus
 * Celastrus scandens
 * Celtis occidentalis - G
 * Cenchrus longispinus
 * Cenchrus tribuloides
 * Centaurea americana
 * Centromadia pungens
 * Cephalanthus occidentalis
 * Cerastium arvense
 * Cerastium nutans
 * Ceratophyllum demersum
 * Ceratophyllum echinatum
 * Cercis canadensis
 * Chaenactis stevioides
 * Chaerophyllum procumbens
 * Chamaecrista fasciculata
 * Chamaecrista nictitans
 * Chamaecyparis thyoides - G
 * Chamaedaphne calyculata
 * Chamaelirium luteum
 * Chamaesyce
 * Chamaesyce glyptosperma
 * Chamaesyce hirta
 * Chamaesyce maculata
 * Chamaesyce nutans
 * Chamaesyce polygonifolia
 * Chamaesyce serpens
 * Chamaesyce serpyllifolia
 * Chamaesyce stictospora
 * Chamaesyce vermiculata
 * Chamerion angustifolium
 * Chasmanthium laxum
 * Cheilanthes lanosa
 * Chelone glabra
 * Chelone lyonii
 * Chenopodium
 * Chenopodium album
 * Chenopodium berlandieri
 * Chenopodium capitatum
 * Chenopodium foggii
 * Chenopodium fremontii
 * Chenopodium pratericola
 * Chenopodium rubrum
 * Chenopodium simplex
 * Chenopodium standleyanum
 * Chimaphila maculata
 * Chimaphila umbellata
 * Chionanthus virginicus
 * Chloris
 * Chloris ciliata
 * Chloris verticillata
 * Chloris virgata
 * Chrysanthemum arcticum
 * Chrysogonum virginianum
 * Chrysopsis mariana
 * Chrysosplenium americanum
 * Cicuta bulbifera
 * Cicuta maculata
 * Cinna arundinacea
 * Cinna latifolia
 * Circaea
 * Circaea alpina
 * Circaea × intermedia
 * Circaea lutetiana
 * Cirsium
 * Cirsium altissimum
 * Cirsium discolor
 * Cirsium horridulum
 * Cirsium muticum
 * Cirsium pumilum
 * Cladium mariscoides
 * Cladrastis kentukea
 * Clarkia amoena
 * Claytonia caroliniana
 * Claytonia virginica
 * Clematis
 * Clematis occidentalis
 * Clematis ochroleuca
 * Clematis virginiana
 * Cleome serrulata
 * Clethra alnifolia
 * Clinopodium arkansanum
 * Clinopodium vulgare
 * Clintonia borealis
 * Clintonia umbellulata
 * Clitoria mariana
 * Collinsia verna
 * Collinsonia canadensis
 * Collomia linearis
 * Comandra umbellata
 * Comarum palustre
 * Commelina
 * Commelina diffusa
 * Commelina erecta
 * Commelina virginica
 * Comptonia peregrina
 * Conioselinum chinense
 * Conoclinium coelestinum
 * Conopholis americana
 * Conyza canadensis
 * Coptis trifolia
 * Corallorhiza
 * Corallorhiza maculata
 * Corallorhiza odontorhiza
 * Corallorhiza striata
 * Corallorhiza trifida
 * Corema conradii
 * Coreopsis
 * Coreopsis grandiflora
 * Coreopsis lanceolata
 * Coreopsis major
 * Coreopsis rosea
 * Coreopsis tinctoria
 * Coreopsis tripteris
 * Coreopsis verticillata
 * Corispermum americanum
 * Cornus
 * Cornus alternifolia
 * Cornus amomum
 * Cornus canadensis
 * Cornus drummondii
 * Cornus florida - G
 * Cornus obliqua
 * Cornus racemosa
 * Cornus rugosa
 * Cornus sericea
 * Cornus × slavinii
 * Corydalis
 * Corydalis aurea
 * Corydalis flavula
 * Corydalis sempervirens
 * Corylus americana
 * Corylus cornuta
 * Crassula aquatica
 * Crataegus
 * Crataegus × anomala
 * Crataegus arcana
 * Crataegus beata
 * Crataegus berberifolia
 * Crataegus brainerdii
 * Crataegus × brevipes
 * Crataegus calpodendron
 * Crataegus chrysocarpa
 * Crataegus coccinioides
 * Crataegus compacta
 * Crataegus compta
 * Crataegus crus-galli
 * Crataegus desueta
 * Crataegus dilatata
 * Crataegus disperma
 * Crataegus dispessa
 * Crataegus dissona
 * Crataegus dodgei
 * Crataegus engelmannii
 * Crataegus flabellata
 * Crataegus fulleriana
 * Crataegus grandis
 * Crataegus holmesiana
 * Crataegus × hudsonica
 * Crataegus intricata
 * Crataegus iracunda
 * Crataegus irrasa
 * Crataegus jesupii
 * Crataegus jonesiae
 * Crataegus knieskerniana
 * Crataegus × laneyi
 * Crataegus lucorum
 * Crataegus lumaria
 * Crataegus macrosperma
 * Crataegus × maligna
 * Crataegus margarettiae
 * Crataegus menandiana
 * Crataegus mollis
 * Crataegus opulens
 * Crataegus × peckietta
 * Crataegus pedicellata
 * Crataegus pennsylvanica
 * Crataegus perjucunda
 * Crataegus persimilis
 * Crataegus phaenopyrum
 * Crataegus pringlei
 * Crataegus prona
 * Crataegus pruinosa
 * Crataegus × puberis
 * Crataegus punctata
 * Crataegus × rubrocarnea
 * Crataegus scabrida
 * Crataegus schuettei
 * Crataegus spissa
 * Crataegus submollis
 * Crataegus suborbiculata
 * Crataegus succulenta
 * Crataegus uniflora
 * Crataegus xanthophylla
 * Crotalaria sagittalis
 * Croton capitatus
 * Cryptogramma stelleri
 * Cryptotaenia canadensis
 * Cucurbita pepo
 * Cunila origanoides
 * Cuphea viscosissima
 * Cuscuta
 * Cuscuta cephalanthi
 * Cuscuta compacta
 * Cuscuta coryli
 * Cuscuta gronovii
 * Cuscuta megalocarpa
 * Cuscuta obtusiflora
 * Cuscuta pentagona
 * Cuscuta polygonorum
 * Cyclachaena xanthiifolia
 * Cycloloma atriplicifolium
 * Cynanchum laeve
 * Cynoglossum virginianum
 * Cyperus
 * Cyperus acuminatus
 * Cyperus bipartitus
 * Cyperus compressus
 * Cyperus dentatus
 * Cyperus diandrus
 * Cyperus echinatus
 * Cyperus erythrorhizos
 * Cyperus esculentus
 * Cyperus filicinus
 * Cyperus flavescens
 * Cyperus flavicomus
 * Cyperus grayi
 * Cyperus houghtonii
 * Cyperus lupulinus
 * Cyperus odoratus
 * Cyperus plukenetii
 * Cyperus polystachyos
 * Cyperus pseudovegetus
 * Cyperus retrorsus
 * Cyperus schweinitzii
 * Cyperus squarrosus
 * Cyperus strigosus
 * Cypripedium
 * Cypripedium acaule
 * Cypripedium × andrewsii
 * Cypripedium arietinum
 * Cypripedium candidum
 * Cypripedium parviflorum
 * Cypripedium reginae
 * Cystopteris
 * Cystopteris bulbifera
 * Cystopteris fragilis
 * Cystopteris protrusa
 * Cystopteris tenuis

=D=
 * Dactylorhiza viridis
 * Dalea purpurea
 * Dalibarda repens
 * Danthonia
 * Danthonia compressa
 * Danthonia spicata
 * Dasiphora fruticosa
 * Datura wrightii
 * Decodon verticillatus
 * Decumaria barbara
 * Dennstaedtia punctilobula
 * Deparia acrostichoides
 * Deschampsia
 * Deschampsia cespitosa
 * Deschampsia danthonioides
 * Deschampsia flexuosa
 * Descurainia pinnata
 * Desmodium
 * Desmodium canadense
 * Desmodium canescens
 * Desmodium ciliare
 * Desmodium cuspidatum
 * Desmodium glabellum
 * Desmodium glutinosum
 * Desmodium humifusum
 * Desmodium laevigatum
 * Desmodium marilandicum
 * Desmodium nudiflorum
 * Desmodium nuttallii
 * Desmodium obtusum
 * Desmodium paniculatum
 * Desmodium pauciflorum
 * Desmodium perplexum
 * Desmodium rotundifolium
 * Desmodium viridiflorum
 * Diapensia lapponica
 * Diarrhena obovata
 * Dicentra
 * Dicentra canadensis
 * Dicentra cucullaria
 * Dicentra eximia
 * Dichanthelium
 * Dichanthelium aciculare
 * Dichanthelium acuminatum
 * Dichanthelium boreale
 * Dichanthelium boscii
 * Dichanthelium clandestinum
 * Dichanthelium commutatum
 * Dichanthelium depauperatum
 * Dichanthelium dichotomum
 * Dichanthelium latifolium
 * Dichanthelium leibergii
 * Dichanthelium linearifolium
 * Dichanthelium longiligulatum
 * Dichanthelium meridionale
 * Dichanthelium oligosanthes
 * Dichanthelium ovale
 * Dichanthelium sabulorum
 * Dichanthelium scabriusculum
 * Dichanthelium scoparium
 * Dichanthelium sphaerocarpon
 * Dichanthelium spretum
 * Dichanthelium villosissimum
 * Dichanthelium wrightianum
 * Dichanthelium xanthophysum
 * Diervilla lonicera
 * Digitaria
 * Digitaria ciliaris
 * Digitaria cognata
 * Digitaria filiformis
 * Diodia teres
 * Dioscorea villosa
 * Diospyros virginiana - G
 * Diplazium pycnocarpon
 * Dirca palustris
 * Distichlis spicata
 * Dodecatheon meadia
 * Doellingeria
 * Doellingeria infirma
 * Doellingeria sericocarpoides
 * Doellingeria umbellata
 * Draba
 * Draba arabisans
 * Draba glabella
 * Draba reptans
 * Dracocephalum parviflorum
 * Drosera
 * Drosera × belezeana
 * Drosera filiformis
 * Drosera intermedia
 * Drosera rotundifolia
 * Dryopteris
 * Dryopteris × benedictii
 * Dryopteris × boottii
 * Dryopteris × burgessii
 * Dryopteris campyloptera
 * Dryopteris carthusiana
 * Dryopteris celsa
 * Dryopteris clintoniana
 * Dryopteris cristata
 * Dryopteris × dowellii
 * Dryopteris filix-mas
 * Dryopteris fragrans
 * Dryopteris goldieana
 * Dryopteris intermedia
 * Dryopteris × leedsii
 * Dryopteris marginalis
 * Dryopteris × mickelii
 * Dryopteris × neowherryi
 * Dryopteris × pittsfordensis
 * Dryopteris × separabilis
 * Dryopteris × slossoniae
 * Dryopteris × triploidea
 * Dryopteris × uliginosa
 * Dulichium arundinaceum
 * Dysphania
 * Dysphania ambrosioides
 * Dysphania graveolens
 * Dyssodia
 * Dyssodia papposa

=E=
 * Echinacea
 * Echinacea pallida
 * Echinacea purpurea
 * Echinochloa
 * Echinochloa muricata
 * Echinochloa walteri
 * Echinocystis lobata
 * Echinodorus tenellus
 * Eclipta prostrata
 * Elaeagnus commutata
 * Elatine
 * Elatine americana
 * Elatine minima
 * Elatine triandra
 * Eleocharis
 * Eleocharis acicularis
 * Eleocharis aestuum
 * Eleocharis compressa
 * Eleocharis diandra
 * Eleocharis elliptica
 * Eleocharis engelmannii
 * Eleocharis equisetoides
 * Eleocharis erythropoda
 * Eleocharis fallax
 * Eleocharis flavescens
 * Eleocharis halophila
 * Eleocharis intermedia
 * Eleocharis melanocarpa
 * Eleocharis microcarpa
 * Eleocharis obtusa
 * Eleocharis olivacea
 * Eleocharis palustris
 * Eleocharis parvula
 * Eleocharis quadrangulata
 * Eleocharis quinqueflora
 * Eleocharis robbinsii
 * Eleocharis rostellata
 * Eleocharis tenuis
 * Eleocharis tortilis
 * Eleocharis tricostata
 * Eleocharis tuberculosa
 * Eleocharis uniglumis
 * Eleocharis wolfii
 * Ellisia nyctelea
 * Elodea
 * Elodea bifoliata
 * Elodea canadensis
 * Elodea nuttallii
 * Elodea schweinitzii
 * Elymus
 * Elymus canadensis
 * Elymus × ebingeri
 * Elymus glaucus
 * Elymus hystrix
 * Elymus macgregorii
 * Elymus riparius
 * Elymus submuticus
 * Elymus trachycaulus
 * Elymus villosus
 * Elymus virginicus
 * Elymus wiegandii
 * Empetrum eamesii
 * Empetrum nigrum
 * Enemion biternatum
 * Epifagus virginiana
 * Epigaea repens
 * Epilobium
 * Epilobium anagallidifolium
 * Epilobium ciliatum
 * Epilobium coloratum
 * Epilobium hornemannii
 * Epilobium leptophyllum
 * Epilobium palustre
 * Epilobium strictum
 * Equisetum
 * Equisetum arvense
 * Equisetum × ferrissii
 * Equisetum fluviatile
 * Equisetum hyemale
 * Equisetum laevigatum
 * Equisetum × litorale
 * Equisetum × mackaii
 * Equisetum × nelsonii
 * Equisetum palustre
 * Equisetum pratense
 * Equisetum scirpoides
 * Equisetum sylvaticum
 * Equisetum variegatum
 * Eragrostis
 * Eragrostis capillaris
 * Eragrostis frankii
 * Eragrostis hypnoides
 * Eragrostis pectinacea
 * Eragrostis spectabilis
 * Eragrostis trichodes
 * Erechtites hieraciifolius
 * Ericameria nauseosa
 * Erigenia bulbosa
 * Erigeron
 * Erigeron annuus
 * Erigeron hyssopifolius
 * Erigeron philadelphicus
 * Erigeron pulchellus
 * Erigeron strigosus
 * Eriocaulon aquaticum
 * Eriocaulon parkeri
 * Eriochloa acuminata
 * Eriophorum
 * Eriophorum angustifolium
 * Eriophorum gracile
 * Eriophorum tenellum
 * Eriophorum vaginatum
 * Eriophorum virginicum
 * Eriophorum viridicarinatum
 * Eryngium aquaticum
 * Erysimum inconspicuum
 * Erythronium albidum
 * Erythronium americanum
 * Eschscholzia californica
 * Eubotrys racemosus
 * Eubotrys recurvus
 * Euonymus
 * Euonymus americanus
 * Euonymus atropurpureus
 * Euonymus obovatus
 * Eupatorium
 * Eupatorium album
 * Eupatorium altissimum
 * Eupatorium hyssopifolium
 * Eupatorium leucolepis
 * Eupatorium perfoliatum
 * Eupatorium pilosum
 * Eupatorium resinosum
 * Eupatorium rotundifolium
 * Eupatorium serotinum
 * Eupatorium sessilifolium
 * Eupatorium × truncatum
 * Euphorbia
 * Euphorbia corollata
 * Euphorbia cyathophora
 * Euphorbia dentata
 * Euphorbia ipecacuanhae
 * Euphorbia marginata
 * Eurybia
 * Eurybia divaricata
 * Eurybia × herveyi
 * Eurybia macrophylla
 * Eurybia radula
 * Eurybia schreberi
 * Eurybia spectabilis
 * Euthamia caroliniana
 * Euthamia graminifolia
 * Eutrochium
 * Eutrochium dubium
 * Eutrochium fistulosum
 * Eutrochium maculatum
 * Eutrochium purpureum

=F=
 * Fagus grandifolia - G
 * Festuca
 * Festuca rubra
 * Festuca saximontana
 * Festuca subverticillata
 * Filipendula rubra
 * Fimbristylis
 * Fimbristylis autumnalis
 * Fimbristylis caroliniana
 * Fimbristylis castanea
 * Fimbristylis puberula
 * Floerkea proserpinacoides
 * Fragaria
 * Fragaria × ananassa
 * Fragaria chiloensis
 * Fragaria vesca
 * Fragaria virginiana
 * Frasera caroliniensis
 * Fraxinus
 * Fraxinus americana - G
 * Fraxinus nigra - G
 * Fraxinus pennsylvanica - G
 * Fraxinus profunda
 * Froelichia floridana
 * Froelichia gracilis
 * Fuirena pumila
 * Fuirena squarrosa

=G=
 * Gaillardia aristata
 * Gaillardia pulchella
 * Galactia volubilis
 * Galax urceolata
 * Galearis spectabilis
 * Galium
 * Galium aparine
 * Galium asprellum
 * Galium boreale
 * Galium brevipes
 * Galium circaezans
 * Galium concinnum
 * Galium kamtschaticum
 * Galium labradoricum
 * Galium lanceolatum
 * Galium obtusum
 * Galium palustre
 * Galium pilosum
 * Galium tinctorium
 * Galium trifidum
 * Galium triflorum
 * Gamochaeta purpurea
 * Gaultheria hispidula
 * Gaultheria procumbens
 * Gaylussacia
 * Gaylussacia baccata
 * Gaylussacia dumosa
 * Gaylussacia frondosa
 * Gentiana
 * Gentiana andrewsii
 * Gentiana clausa
 * Gentiana linearis
 * Gentiana puberulenta
 * Gentiana saponaria
 * Gentianella quinquefolia
 * Gentianopsis crinita
 * Gentianopsis virgata
 * Geocaulon lividum
 * Geranium
 * Geranium bicknellii
 * Geranium carolinianum
 * Geranium maculatum
 * Geranium robertianum
 * Geum
 * Geum aleppicum
 * Geum × aurantiacum
 * Geum canadense
 * Geum laciniatum
 * Geum macrophyllum
 * Geum rivale
 * Geum triflorum
 * Geum vernum
 * Geum virginianum
 * Gilia achilleifolia
 * Gilia capitata
 * Gillenia stipulata
 * Gillenia trifoliata
 * Glandularia canadensis
 * Glaux maritima
 * Gleditsia aquatica
 * Gleditsia triacanthos
 * Glyceria
 * Glyceria acutiflora
 * Glyceria arkansana
 * Glyceria borealis
 * Glyceria canadensis
 * Glyceria × gatineauensis
 * Glyceria grandis
 * Glyceria laxa
 * Glyceria melicaria
 * Glyceria obtusa
 * Glyceria septentrionalis
 * Glyceria striata
 * Glycyrrhiza lepidota
 * Goodyera
 * Goodyera pubescens
 * Goodyera repens
 * Goodyera tesselata
 * Gratiola aurea
 * Gratiola neglecta
 * Grindelia squarrosa
 * Gutierrezia sarothrae
 * Gymnocarpium × brittonianum
 * Gymnocarpium dryopteris
 * Gymnocladus dioicus

=H=
 * Hackelia deflexa
 * Hackelia virginiana
 * Halenia deflexa
 * Halesia carolina
 * Halesia tetraptera
 * Hamamelis virginiana
 * Harrimanella hypnoides
 * Hasteola suaveolens
 * Hedeoma hispida
 * Hedeoma pulegioides
 * Helenium autumnale
 * Helenium flexuosum
 * Helianthemum
 * Helianthemum bicknellii
 * Helianthemum canadense
 * Helianthemum dumosum
 * Helianthemum propinquum
 * Helianthus
 * Helianthus × ambiguus
 * Helianthus angustifolius
 * Helianthus annuus
 * Helianthus decapetalus
 * Helianthus divaricatus
 * Helianthus giganteus
 * Helianthus grosseserratus
 * Helianthus hirsutus
 * Helianthus × kellermanii
 * Helianthus × laetiflorus
 * Helianthus maximiliani
 * Helianthus mollis
 * Helianthus pauciflorus
 * Helianthus petiolaris
 * Helianthus salicifolius
 * Helianthus strumosus
 * Helianthus tuberosus
 * Heliomeris multiflora
 * Heliopsis helianthoides
 * Heliotropium curassavicum
 * Helonias bullata
 * Hepatica nobilis
 * Heracleum maximum
 * Hesperostipa comata
 * Heteranthera dubia
 * Heteranthera reniformis
 * Heterotheca subaxillaris
 * Heuchera americana
 * Heuchera villosa
 * Hexastylis shuttleworthii
 * Hibiscus laevis
 * Hibiscus moscheutos
 * Hieracium
 * Hieracium gronovii
 * Hieracium kalmii
 * Hieracium marianum
 * Hieracium paniculatum
 * Hieracium scabrum
 * Hieracium umbellatum
 * Hieracium venosum
 * Hierochloe hirta
 * Hierochloe odorata
 * Hippuris vulgaris
 * Honckenya peploides
 * Hordeum
 * Hordeum brachyantherum
 * Hordeum jubatum
 * Hordeum pusillum
 * Hottonia inflata
 * Houstonia
 * Houstonia caerulea
 * Houstonia canadensis
 * Houstonia longifolia
 * Houstonia purpurea
 * Houstonia pusilla
 * Hudsonia ericoides
 * Hudsonia tomentosa
 * Humulus lupulus
 * Huperzia
 * Huperzia appalachiana
 * Huperzia × bartleyi
 * Huperzia lucidula
 * Huperzia selago
 * Hybanthus concolor
 * Hydrangea arborescens
 * Hydrastis canadensis
 * Hydrocotyle
 * Hydrocotyle americana
 * Hydrocotyle ranunculoides
 * Hydrocotyle umbellata
 * Hydrocotyle verticillata
 * Hydrophyllum canadense
 * Hydrophyllum virginianum
 * Hylotelephium telephioides
 * Hypericum
 * Hypericum adpressum
 * Hypericum ascyron
 * Hypericum boreale
 * Hypericum canadense
 * Hypericum crux-andreae
 * Hypericum densiflorum
 * Hypericum denticulatum
 * Hypericum dissimulatum
 * Hypericum ellipticum
 * Hypericum frondosum
 * Hypericum gentianoides
 * Hypericum gymnanthum
 * Hypericum hypericoides
 * Hypericum kalmianum
 * Hypericum majus
 * Hypericum mutilum
 * Hypericum prolificum
 * Hypericum punctatum
 * Hypoxis hirsuta

=I=
 * Ilex
 * Ilex glabra
 * Ilex laevigata
 * Ilex montana
 * Ilex mucronata
 * Ilex opaca - G
 * Ilex verticillata
 * Impatiens capensis
 * Impatiens pallida
 * Ionactis linariifolius
 * Ipomoea lacunosa
 * Ipomoea pandurata
 * Ipomopsis rubra
 * Iris
 * Iris prismatica
 * Iris verna
 * Iris versicolor
 * Iris virginica
 * Isoetes
 * Isoetes acadiensis
 * Isoetes × brittonii
 * Isoetes × dodgei
 * Isoetes × eatonii
 * Isoetes engelmannii
 * Isoetes × heterospora
 * Isoetes lacustris
 * Isoetes riparia
 * Isoetes tenella
 * Isoetes tuckermanii
 * Isotria medeoloides
 * Isotria verticillata
 * Iva frutescens

=J=
 * Jeffersonia diphylla
 * Juglans cinerea
 * Juglans nigra - G
 * Juncus
 * Juncus acuminatus
 * Juncus alpinoarticulatus
 * Juncus ambiguus
 * Juncus anthelatus
 * Juncus arcticus
 * Juncus articulatus
 * Juncus biflorus
 * Juncus brachycarpus
 * Juncus brachycephalus
 * Juncus brevicaudatus
 * Juncus bufonius
 * Juncus caesariensis
 * Juncus canadensis
 * Juncus debilis
 * Juncus dichotomus
 * Juncus diffusissimus
 * Juncus dudleyi
 * Juncus effusus
 * Juncus ensifolius
 * Juncus filiformis
 * Juncus gerardii
 * Juncus greenei
 * Juncus marginatus
 * Juncus militaris
 * Juncus nodosus
 * Juncus pelocarpus
 * Juncus scirpoides
 * Juncus secundus
 * Juncus stygius
 * Juncus subcaudatus
 * Juncus tenuis
 * Juncus torreyi
 * Juncus trifidus
 * Juniperus
 * Juniperus communis
 * Juniperus horizontalis
 * Juniperus virginiana - G
 * Justicia americana

=K=
 * Kalmia
 * Kalmia angustifolia
 * Kalmia latifolia
 * Kalmia polifolia
 * Koeleria macrantha
 * Kosteletzkya virginica
 * Krigia
 * Krigia biflora
 * Krigia caespitosa
 * Krigia virginica
 * Kyllinga gracillima
 * Kyllinga pumila

=L=
 * Lachnanthes caroliana
 * Lactuca
 * Lactuca biennis
 * Lactuca canadensis
 * Lactuca floridana
 * Lactuca hirsuta
 * Lactuca × morssii
 * Lactuca tatarica
 * Laportea canadensis
 * Lappula occidentalis
 * Larix laricina - G
 * Lathyrus
 * Lathyrus japonicus
 * Lathyrus ochroleucus
 * Lathyrus palustris
 * Lathyrus venosus
 * Lechea
 * Lechea intermedia
 * Lechea maritima
 * Lechea minor
 * Lechea mucronata
 * Lechea pulchella
 * Lechea racemulosa
 * Lechea tenuifolia
 * Ledum groenlandicum
 * Leersia oryzoides
 * Leersia virginica
 * Lemna
 * Lemna minor
 * Lemna obscura
 * Lemna perpusilla
 * Lemna trisulca
 * Lemna turionifera
 * Lemna valdiviana
 * Lepidium
 * Lepidium densiflorum
 * Lepidium nitidum
 * Lepidium ramosissimum
 * Lepidium virginicum
 * Leptochloa fusca
 * Lespedeza
 * Lespedeza angustifolia
 * Lespedeza × brittonii
 * Lespedeza capitata
 * Lespedeza frutescens
 * Lespedeza hirta
 * Lespedeza × longifolia
 * Lespedeza × neglecta
 * Lespedeza × nuttallii
 * Lespedeza × oblongifolia
 * Lespedeza procumbens
 * Lespedeza repens
 * Lespedeza × simulata
 * Lespedeza stuevei
 * Lespedeza violacea
 * Lespedeza virginica
 * Leucophysalis grandiflora
 * Leucospora multifida
 * Leucothoe fontanesiana
 * Liatris
 * Liatris aspera
 * Liatris cylindracea
 * Liatris pycnostachya
 * Liatris scariosa
 * Liatris spicata
 * Ligusticum scoticum
 * Lilaeopsis chinensis
 * Lilium
 * Lilium canadense
 * Lilium michiganense
 * Lilium philadelphicum
 * Lilium superbum
 * Limnobium spongia
 * Limonium carolinianum
 * Limosella australis
 * Lindera benzoin
 * Lindernia dubia
 * Linnaea borealis
 * Linum
 * Linum intercursum
 * Linum medium
 * Linum striatum
 * Linum sulcatum
 * Linum virginianum
 * Liparis liliifolia
 * Liparis loeselii
 * Lipocarpha micrantha
 * Liquidambar styraciflua - G
 * Liriodendron tulipifera - G
 * Listera
 * Listera auriculata
 * Listera australis
 * Listera convallarioides
 * Listera cordata
 * Lithospermum
 * Lithospermum canescens
 * Lithospermum caroliniense
 * Lithospermum latifolium
 * Littorella uniflora
 * Lobelia
 * Lobelia cardinalis
 * Lobelia dortmanna
 * Lobelia inflata
 * Lobelia kalmii
 * Lobelia nuttallii
 * Lobelia siphilitica
 * Lobelia spicata
 * Loiseleuria procumbens
 * Lonicera
 * Lonicera canadensis
 * Lonicera dioica
 * Lonicera hirsuta
 * Lonicera oblongifolia
 * Lonicera reticulata
 * Lonicera sempervirens
 * Lonicera villosa
 * Lotus unifoliolatus
 * Ludwigia
 * Ludwigia alternifolia
 * Ludwigia palustris
 * Ludwigia peploides
 * Ludwigia sphaerocarpa
 * Lupinus perennis
 * Lupinus polyphyllus
 * Luzula
 * Luzula acuminata
 * Luzula bulbosa
 * Luzula echinata
 * Luzula multiflora
 * Luzula parviflora
 * Luzula spicata
 * Lycopodiella
 * Lycopodiella alopecuroides
 * Lycopodiella appressa
 * Lycopodiella caroliniana
 * Lycopodiella × copelandii
 * Lycopodiella × gilmanii
 * Lycopodiella inundata
 * Lycopodium
 * Lycopodium annotinum
 * Lycopodium clavatum
 * Lycopodium complanatum
 * Lycopodium dendroideum
 * Lycopodium digitatum
 * Lycopodium × habereri
 * Lycopodium hickeyi
 * Lycopodium lagopus
 * Lycopodium obscurum
 * Lycopodium sabinifolium
 * Lycopodium sitchense
 * Lycopodium tristachyum
 * Lycopodium × zeilleri
 * Lycopus
 * Lycopus americanus
 * Lycopus amplectens
 * Lycopus asper
 * Lycopus rubellus
 * Lycopus uniflorus
 * Lycopus virginicus
 * Lygodium palmatum
 * Lyonia ligustrina
 * Lyonia mariana
 * Lysimachia
 * Lysimachia ciliata
 * Lysimachia × commixta
 * Lysimachia hybrida
 * Lysimachia × producta
 * Lysimachia quadriflora
 * Lysimachia quadrifolia
 * Lysimachia terrestris
 * Lysimachia thyrsiflora
 * Lythrum alatum
 * Lythrum lineare

=M=
 * Machaeranthera
 * Machaeranthera canescens
 * Machaeranthera gracilis
 * Machaeranthera tanacetifolia
 * Maclura pomifera
 * Madia sativa
 * Magnolia
 * Magnolia acuminata
 * Magnolia fraseri
 * Magnolia macrophylla
 * Magnolia tripetala
 * Magnolia virginiana - G
 * Mahonia aquifolium
 * Maianthemum
 * Maianthemum canadense
 * Maianthemum racemosum
 * Maianthemum stellatum
 * Maianthemum trifolium
 * Malacothrix sonchoides
 * Malaxis
 * Malaxis bayardii
 * Malaxis brachypoda
 * Malaxis unifolia
 * Malus coronaria
 * Matteuccia struthiopteris
 * Medeola virginiana
 * Melampyrum lineare
 * Menispermum canadense
 * Mentha arvensis
 * Mentha × piperita
 * Menyanthes trifoliata
 * Mertensia virginica
 * Micranthemum micranthemoides
 * Mikania scandens
 * Milium effusum
 * Mimulus
 * Mimulus alatus
 * Mimulus guttatus
 * Mimulus moschatus
 * Mimulus ringens
 * Minuartia
 * Minuartia caroliniana
 * Minuartia glabra
 * Minuartia groenlandica
 * Minuartia michauxii
 * Mirabilis
 * Mirabilis hirsuta
 * Mirabilis linearis
 * Mirabilis nyctaginea
 * Mitchella repens
 * Mitella
 * Mitella diphylla
 * Mitella × intermedia
 * Mitella nuda
 * Mitella prostrata
 * Moehringia lateriflora
 * Mollugo verticillata
 * Monarda
 * Monarda clinopodia
 * Monarda didyma
 * Monarda fistulosa
 * Monarda media
 * Monarda punctata
 * Moneses uniflora
 * Monolepis nuttalliana
 * Monotropa hypopitys
 * Monotropa uniflora
 * Morella caroliniensis
 * Morella pensylvanica
 * Morus rubra - G
 * Muhlenbergia
 * Muhlenbergia asperifolia
 * Muhlenbergia capillaris
 * Muhlenbergia frondosa
 * Muhlenbergia glomerata
 * Muhlenbergia mexicana
 * Muhlenbergia racemosa
 * Muhlenbergia schreberi
 * Muhlenbergia sobolifera
 * Muhlenbergia sylvatica
 * Muhlenbergia tenuiflora
 * Muhlenbergia torreyana
 * Muhlenbergia uniflora
 * Myosotis laxa
 * Myosotis verna
 * Myrica gale
 * Myriophyllum
 * Myriophyllum alterniflorum
 * Myriophyllum farwellii
 * Myriophyllum heterophyllum
 * Myriophyllum humile
 * Myriophyllum pinnatum
 * Myriophyllum sibiricum
 * Myriophyllum tenellum
 * Myriophyllum verticillatum

=N=
 * Najas
 * Najas flexilis
 * Najas gracillima
 * Najas guadalupensis
 * Najas marina
 * Nassella viridula
 * Nelumbo lutea
 * Neobeckia aquatica
 * Nothocalais cuspidata
 * Nuphar lutea
 * Nuttallanthus canadensis
 * Nymphaea odorata
 * Nymphoides cordata
 * Nyssa sylvatica - G

=O=
 * Oclemena
 * Oclemena acuminata
 * Oclemena × blakei
 * Oclemena nemoralis
 * Oenothera
 * Oenothera albicaulis
 * Oenothera biennis
 * Oenothera clelandii
 * Oenothera fruticosa
 * Oenothera grandiflora
 * Oenothera grandis
 * Oenothera laciniata
 * Oenothera nutans
 * Oenothera oakesiana
 * Oenothera parviflora
 * Oenothera perennis
 * Oenothera pilosella
 * Oenothera speciosa
 * Oenothera triloba
 * Oenothera villosa
 * Oldenlandia uniflora
 * Oligoneuron
 * Oligoneuron album
 * Oligoneuron houghtonii
 * Oligoneuron ohioense
 * Oligoneuron rigidum
 * Omalotheca sylvatica
 * Onoclea sensibilis
 * Onosmodium bejariense
 * Onosmodium virginianum
 * Ophioglossum pusillum
 * Ophioglossum vulgatum
 * Oplopanax horridus
 * Opuntia humifusa
 * Orobanche uniflora
 * Orontium aquaticum
 * Orthilia secunda
 * Orthocarpus bracteosus
 * Oryzopsis asperifolia
 * Osmorhiza claytonii
 * Osmorhiza longistylis
 * Osmunda
 * Osmunda cinnamomea
 * Osmunda claytoniana
 * Osmunda regalis
 * Ostrya virginiana - G
 * Oxalis
 * Oxalis corniculata
 * Oxalis dillenii
 * Oxalis montana
 * Oxalis stricta
 * Oxalis violacea
 * Oxydendrum arboreum
 * Oxypolis rigidior

=P=
 * Pachysandra procumbens
 * Packera
 * Packera anonyma
 * Packera aurea
 * Packera obovata
 * Packera paupercula
 * Packera schweinitziana
 * Panax
 * Panax quinquefolius
 * Panax trifolius
 * Panicum
 * Panicum amarum
 * Panicum anceps
 * Panicum capillare
 * Panicum dichotomiflorum
 * Panicum flexile
 * Panicum gattingeri
 * Panicum philadelphicum
 * Panicum rigidulum
 * Panicum verrucosum
 * Panicum virgatum
 * Pappophorum
 * Pappophorum bicolor
 * Pappophorum vaginatum
 * Parathelypteris noveboracensis
 * Parietaria pensylvanica
 * Parnassia glauca
 * Paronychia canadensis
 * Paronychia fastigiata
 * Parthenium integrifolium
 * Parthenocissus quinquefolia
 * Parthenocissus vitacea
 * Pascopyrum smithii
 * Paspalum laeve
 * Paspalum setaceum
 * Patis racemosa
 * Pedicularis canadensis
 * Pedicularis lanceolata
 * Pediomelum esculentum
 * Pellaea atropurpurea
 * Pellaea glabella
 * Peltandra virginica
 * Penstemon
 * Penstemon calycosus
 * Penstemon digitalis
 * Penstemon hirsutus
 * Penstemon pallidus
 * Penstemon tubaeflorus
 * Penthorum sedoides
 * Petasites frigidus
 * Phacelia
 * Phacelia campanularia
 * Phacelia ciliata
 * Phacelia dubia
 * Phalaris arundinacea
 * Phaseolus polystachios
 * Phegopteris connectilis
 * Phegopteris hexagonoptera
 * Philadelphus
 * Philadelphus floridus
 * Philadelphus inodorus
 * Philadelphus pubescens
 * Phlox
 * Phlox divaricata
 * Phlox maculata
 * Phlox paniculata
 * Phlox pilosa
 * Phlox stolonifera
 * Phlox subulata
 * Phoradendron leucarpum
 * Phragmites australis
 * Phryma leptostachya
 * Phyla lanceolata
 * Physalis
 * Physalis grisea
 * Physalis hederifolia
 * Physalis heterophylla
 * Physalis longifolia
 * Physalis pubescens
 * Physalis virginiana
 * Physocarpus opulifolius
 * Physostegia virginiana
 * Phytolacca americana
 * Picea
 * Picea glauca
 * Picea mariana
 * Picea pungens
 * Picea rubens - G
 * Picris hieracioides
 * Pilea fontana
 * Pilea pumila
 * Pinguicula vulgaris
 * Pinus
 * Pinus banksiana
 * Pinus echinata - G
 * Pinus resinosa - G
 * Pinus rigida - G
 * Pinus strobus - G
 * Pinus virginiana - G
 * Piptatheropsis canadensis
 * Piptatheropsis pungens
 * Piptochaetium avenaceum
 * Pistia stratiotes
 * Pityopsis falcata
 * Plantago
 * Plantago aristata
 * Plantago cordata
 * Plantago elongata
 * Plantago eriopoda
 * Plantago heterophylla
 * Plantago maritima
 * Plantago patagonica
 * Plantago pusilla
 * Plantago rugelii
 * Plantago virginica
 * Platanthera
 * Platanthera × andrewsii
 * Platanthera aquilonis
 * Platanthera × bicolor
 * Platanthera blephariglottis
 * Platanthera × canbyi
 * Platanthera × channellii
 * Platanthera ciliaris
 * Platanthera clavellata
 * Platanthera cristata
 * Platanthera dilatata
 * Platanthera flava
 * Platanthera grandiflora
 * Platanthera hookeri
 * Platanthera huronensis
 * Platanthera lacera
 * Platanthera leucophaea
 * Platanthera macrophylla
 * Platanthera × media
 * Platanthera obtusata
 * Platanthera orbiculata
 * Platanthera psycodes
 * Platanthera × shriveri
 * Platanus occidentalis - G
 * Pleopeltis polypodioides
 * Pluchea odorata
 * Poa
 * Poa alsodes
 * Poa chapmaniana
 * Poa cuspidata
 * Poa glauca
 * Poa laxa
 * Poa nemoralis
 * Poa paludigena
 * Poa palustris
 * Poa pratensis
 * Poa saltuensis
 * Poa sylvestris
 * Podophyllum peltatum
 * Podostemum ceratophyllum
 * Pogonia ophioglossoides
 * Polanisia dodecandra
 * Polemonium reptans
 * Polemonium vanbruntiae
 * Polygala
 * Polygala ambigua
 * Polygala cruciata
 * Polygala incarnata
 * Polygala lutea
 * Polygala mariana
 * Polygala nuttallii
 * Polygala paucifolia
 * Polygala polygama
 * Polygala sanguinea
 * Polygala senega
 * Polygala verticillata
 * Polygonatum biflorum
 * Polygonatum pubescens
 * Polygonella articulata
 * Polygonum
 * Polygonum achoreum
 * Polygonum amphibium
 * Polygonum arifolium
 * Polygonum buxiforme
 * Polygonum careyi
 * Polygonum cilinode
 * Polygonum douglasii
 * Polygonum erectum
 * Polygonum glaucum
 * Polygonum hydropiperoides
 * Polygonum lapathifolium
 * Polygonum pensylvanicum
 * Polygonum punctatum
 * Polygonum ramosissimum
 * Polygonum robustius
 * Polygonum sagittatum
 * Polygonum scandens
 * Polygonum setaceum
 * Polygonum tenue
 * Polygonum virginianum
 * Polymnia canadensis
 * Polypodium appalachianum
 * Polypodium virginianum
 * Polypogon interruptus
 * Polypremum procumbens
 * Polystichum
 * Polystichum acrostichoides
 * Polystichum braunii
 * Polystichum × hagenahii
 * Polystichum lonchitis
 * Polystichum × potteri
 * Pontederia cordata
 * Populus
 * Populus balsamifera - G
 * Populus × canadensis
 * Populus deltoides - G
 * Populus grandidentata - G
 * Populus heterophylla - G
 * Populus × jackii
 * Populus × smithii
 * Populus tremuloides - G
 * Portulaca oleracea
 * Portulaca pilosa
 * Potamogeton
 * Potamogeton alpinus
 * Potamogeton amplifolius
 * Potamogeton × argutulus
 * Potamogeton bicupulatus
 * Potamogeton confervoides
 * Potamogeton diversifolius
 * Potamogeton epihydrus
 * Potamogeton × faxonii
 * Potamogeton foliosus
 * Potamogeton friesii
 * Potamogeton gramineus
 * Potamogeton × haynesii
 * Potamogeton hillii
 * Potamogeton illinoensis
 * Potamogeton natans
 * Potamogeton × nitens
 * Potamogeton nodosus
 * Potamogeton oakesianus
 * Potamogeton obtusifolius
 * Potamogeton ogdenii
 * Potamogeton perfoliatus
 * Potamogeton praelongus
 * Potamogeton pulcher
 * Potamogeton pusillus
 * Potamogeton richardsonii
 * Potamogeton robbinsii
 * Potamogeton × sparganiifolius
 * Potamogeton × spathuliformis
 * Potamogeton spirillus
 * Potamogeton strictifolius
 * Potamogeton × subdentatus
 * Potamogeton × subobtusus
 * Potamogeton vaseyi
 * Potamogeton zosteriformis
 * Potentilla
 * Potentilla arguta
 * Potentilla canadensis
 * Potentilla norvegica
 * Potentilla paradoxa
 * Potentilla rivalis
 * Potentilla simplex
 * Prenanthella exigua
 * Prenanthes
 * Prenanthes alba
 * Prenanthes altissima
 * Prenanthes boottii
 * Prenanthes crepidinea
 * Prenanthes × mainensis
 * Prenanthes nana
 * Prenanthes racemosa
 * Prenanthes serpentaria
 * Prenanthes trifoliolata
 * Primula mistassinica
 * Proboscidea louisianica
 * Prosartes lanuginosa
 * Proserpinaca palustris
 * Proserpinaca pectinata
 * Prunella vulgaris
 * Prunus
 * Prunus alleghaniensis
 * Prunus americana - G
 * Prunus maritima
 * Prunus nigra
 * Prunus pensylvanica - G
 * Prunus pumila
 * Prunus serotina - G
 * Prunus susquehanae
 * Prunus virginiana - G
 * Pseudognaphalium
 * Pseudognaphalium helleri
 * Pseudognaphalium macounii
 * Pseudognaphalium obtusifolium
 * Pseudognaphalium stramineum
 * Pseudotsuga menziesii
 * Ptelea trifoliata
 * Pteridium aquilinum
 * Pterospora andromedea
 * Ptilimnium capillaceum
 * Puccinellia
 * Puccinellia distans
 * Puccinellia fasciculata
 * Puccinellia maritima
 * Puccinellia nuttalliana
 * Puccinellia tenella
 * Pycnanthemum
 * Pycnanthemum clinopodioides
 * Pycnanthemum incanum
 * Pycnanthemum muticum
 * Pycnanthemum tenuifolium
 * Pycnanthemum torrei
 * Pycnanthemum verticillatum
 * Pycnanthemum virginianum
 * Pyrola
 * Pyrola americana
 * Pyrola asarifolia
 * Pyrola chlorantha
 * Pyrola elliptica
 * Pyrola minor
 * Pyrularia pubera
 * Pyxidanthera barbulata

=Q=
 * Quercus
 * Quercus alba - G
 * Quercus bicolor - G
 * Quercus × brittonii
 * Quercus × bushii
 * Quercus coccinea - G
 * Quercus × deamii
 * Quercus falcata
 * Quercus × faxonii
 * Quercus × fernowii
 * Quercus × filialis
 * Quercus × giffordii
 * Quercus × hawkinsiae
 * Quercus × heterophylla
 * Quercus ilicifolia
 * Quercus imbricaria
 * Quercus × jackiana
 * Quercus macrocarpa
 * Quercus marilandica - G
 * Quercus montana - G
 * Quercus muehlenbergii - G
 * Quercus palustris - G
 * Quercus phellos - G
 * Quercus prinoides
 * Quercus × rehderi
 * Quercus × robbinsii
 * Quercus rubra - G
 * Quercus × rudkinii
 * Quercus × saulii
 * Quercus × schuettei
 * Quercus shumardii
 * Quercus stellata - G
 * Quercus velutina - G

=R=
 * Ranunculus
 * Ranunculus abortivus
 * Ranunculus acris
 * Ranunculus allegheniensis
 * Ranunculus ambigens
 * Ranunculus cymbalaria
 * Ranunculus fascicularis
 * Ranunculus flabellaris
 * Ranunculus flammula
 * Ranunculus hispidus
 * Ranunculus longirostris
 * Ranunculus micranthus
 * Ranunculus pensylvanicus
 * Ranunculus pusillus
 * Ranunculus recurvatus
 * Ranunculus sceleratus
 * Ranunculus trichophyllus
 * Ratibida columnifera
 * Ratibida pinnata
 * Rhamnus alnifolia
 * Rhexia mariana
 * Rhexia virginica
 * Rhinanthus minor
 * Rhodiola integrifolia
 * Rhodiola rosea
 * Rhododendron
 * Rhododendron arborescens
 * Rhododendron calendulaceum
 * Rhododendron canadense
 * Rhododendron lapponicum
 * Rhododendron maximum
 * Rhododendron periclymenoides
 * Rhododendron prinophyllum
 * Rhododendron viscosum
 * Rhus
 * Rhus aromatica
 * Rhus × borealis
 * Rhus copallinum
 * Rhus glabra
 * Rhus typhina
 * Rhynchospora
 * Rhynchospora alba
 * Rhynchospora capillacea
 * Rhynchospora capitellata
 * Rhynchospora cephalantha
 * Rhynchospora chalarocephala
 * Rhynchospora fusca
 * Rhynchospora globularis
 * Rhynchospora gracilenta
 * Rhynchospora inundata
 * Rhynchospora macrostachya
 * Rhynchospora nitens
 * Rhynchospora pallida
 * Rhynchospora recognita
 * Rhynchospora scirpoides
 * Rhynchospora torreyana
 * Ribes
 * Ribes americanum
 * Ribes aureum
 * Ribes cynosbati
 * Ribes glandulosum
 * Ribes hirtellum
 * Ribes lacustre
 * Ribes missouriense
 * Ribes rotundifolium
 * Ribes triste
 * Robinia
 * Robinia hispida
 * Robinia pseudoacacia
 * Robinia viscosa
 * Rorippa palustris
 * Rorippa sinuata
 * Rosa
 * Rosa acicularis
 * Rosa arkansana
 * Rosa blanda
 * Rosa carolina
 * Rosa × housei
 * Rosa nitida
 * Rosa × palustriformis
 * Rosa palustris
 * Rosa setigera
 * Rosa virginiana
 * Rotala ramosior
 * Rubus
 * Rubus adjacens
 * Rubus allegheniensis
 * Rubus alumnus
 * Rubus andrewsianus
 * Rubus aptatus
 * Rubus arenicola
 * Rubus argutus
 * Rubus baileyanus
 * Rubus bellobatus
 * Rubus biformispinus
 * Rubus bigelovianus
 * Rubus burnhamii
 * Rubus canadensis
 * Rubus chamaemorus
 * Rubus cuneifolius
 * Rubus dissimilis
 * Rubus elegantulus
 * Rubus exsularis
 * Rubus fecundus
 * Rubus felix
 * Rubus flagellaris
 * Rubus frondisentis
 * Rubus frondosus
 * Rubus furtivus
 * Rubus glandicaulis
 * Rubus gnarus
 * Rubus heterophyllus
 * Rubus hispidus
 * Rubus idaeus
 * Rubus inclinis
 * Rubus insons
 * Rubus insulanus
 * Rubus invisus
 * Rubus ithacanus
 * Rubus jacens
 * Rubus laudatus
 * Rubus lawrencei
 * Rubus longii
 * Rubus multifer
 * Rubus multiformis
 * Rubus notatus
 * Rubus noveboracus
 * Rubus obsessus
 * Rubus occidentalis
 * Rubus odoratus
 * Rubus ostryifolius
 * Rubus paganus
 * Rubus parcifrondifer
 * Rubus pensilvanicus
 * Rubus pergratus
 * Rubus permixtus
 * Rubus philadelphicus
 * Rubus plicatifolius
 * Rubus pubescens
 * Rubus pugnax
 * Rubus recurvans
 * Rubus recurvicaulis
 * Rubus regionalis
 * Rubus roribaccus
 * Rubus rosa
 * Rubus rydbergianus
 * Rubus semisetosus
 * Rubus setosus
 * Rubus signatus
 * Rubus trifrons
 * Rubus vermontanus
 * Rubus wheeleri
 * Rudbeckia
 * Rudbeckia fulgida
 * Rudbeckia hirta
 * Rudbeckia laciniata
 * Rudbeckia subtomentosa
 * Rudbeckia triloba
 * Rumex
 * Rumex acetosa
 * Rumex altissimus
 * Rumex hastatulus
 * Rumex maritimus
 * Rumex orbiculatus
 * Rumex pallidus
 * Rumex salicifolius
 * Rumex verticillatus
 * Ruppia maritima

=S=
 * Sabatia
 * Sabatia angularis
 * Sabatia campanulata
 * Sabatia dodecandra
 * Sabatia stellaris
 * Saccharum giganteum
 * Sagina decumbens
 * Sagittaria
 * Sagittaria australis
 * Sagittaria calycina
 * Sagittaria cuneata
 * Sagittaria engelmanniana
 * Sagittaria graminea
 * Sagittaria latifolia
 * Sagittaria rigida
 * Sagittaria subulata
 * Sagittaria teres
 * Salicornia bigelovii
 * Salicornia depressa
 * Salix
 * Salix amygdaloides
 * Salix bebbiana
 * Salix × bebbii
 * Salix candida
 * Salix × conifera
 * Salix cordata
 * Salix discolor
 * Salix eriocephala
 * Salix herbacea
 * Salix humilis
 * Salix interior
 * Salix lucida
 * Salix nigra - G
 * Salix pedicellaris
 * Salix petiolaris
 * Salix pyrifolia
 * Salix sericea
 * Salix serissima
 * Salix uva-ursi
 * Salvia
 * Salvia azurea
 * Salvia lyrata
 * Salvia reflexa
 * Sambucus nigra
 * Sambucus racemosa
 * Samolus valerandi
 * Sanguinaria canadensis
 * Sanguisorba annua
 * Sanguisorba canadensis
 * Sanicula
 * Sanicula canadensis
 * Sanicula marilandica
 * Sanicula odorata
 * Sanicula trifoliata
 * Sarcocornia pacifica
 * Sarcocornia perennis
 * Sarracenia purpurea
 * Sassafras albidum - G
 * Saururus cernuus
 * Saxifraga
 * Saxifraga aizoides
 * Saxifraga oppositifolia
 * Saxifraga paniculata
 * Saxifraga pensylvanica
 * Saxifraga virginiensis
 * Schedonorus × aschersonianus
 * Scheuchzeria palustris
 * Schizachne purpurascens
 * Schizachyrium littorale
 * Schizachyrium scoparium
 * Schizaea pusilla
 * Schoenoplectiella purshiana
 * Schoenoplectiella smithii
 * Schoenoplectus
 * Schoenoplectus acutus
 * Schoenoplectus americanus
 * Schoenoplectus × carinatus
 * Schoenoplectus heterochaetus
 * Schoenoplectus × oblongus
 * Schoenoplectus pungens
 * Schoenoplectus subterminalis
 * Schoenoplectus tabernaemontani
 * Schoenoplectus torreyi
 * Schwalbea americana
 * Scirpus
 * Scirpus ancistrochaetus
 * Scirpus atrocinctus
 * Scirpus atrovirens
 * Scirpus cyperinus
 * Scirpus expansus
 * Scirpus georgianus
 * Scirpus hattorianus
 * Scirpus longii
 * Scirpus microcarpus
 * Scirpus pallidus
 * Scirpus × peckii
 * Scirpus pedicellatus
 * Scirpus pendulus
 * Scirpus polyphyllus
 * Scleria
 * Scleria minor
 * Scleria muehlenbergii
 * Scleria pauciflora
 * Scleria reticularis
 * Scleria triglomerata
 * Scleria verticillata
 * Scrophularia
 * Scrophularia lanceolata
 * Scrophularia marilandica
 * Scrophularia nodosa
 * Scutellaria
 * Scutellaria elliptica
 * Scutellaria galericulata
 * Scutellaria incana
 * Scutellaria integrifolia
 * Scutellaria lateriflora
 * Scutellaria nervosa
 * Scutellaria parvula
 * Scutellaria serrata
 * Sedum ternatum
 * Selaginella
 * Selaginella apoda
 * Selaginella eclipes
 * Selaginella rupestris
 * Senecio eremophilus
 * Senna
 * Senna hebecarpa
 * Senna marilandica
 * Senna obtusifolia
 * Sericocarpus asteroides
 * Sericocarpus linifolius
 * Sesbania herbacea
 * Sesuvium maritimum
 * Setaria parviflora
 * Shepherdia argentea
 * Shepherdia canadensis
 * Sibbaldiopsis tridentata
 * Sicyos angulatus
 * Sida hermaphrodita
 * Sida spinosa
 * Sidalcea oregana
 * Silene
 * Silene antirrhina
 * Silene caroliniana
 * Silene nivea
 * Silene stellata
 * Silene virginica
 * Silphium
 * Silphium laciniatum
 * Silphium perfoliatum
 * Silphium trifoliatum
 * Sisyrinchium
 * Sisyrinchium angustifolium
 * Sisyrinchium atlanticum
 * Sisyrinchium fuscatum
 * Sisyrinchium montanum
 * Sisyrinchium mucronatum
 * Sium carsonii
 * Sium suave
 * Smallanthus uvedalius
 * Smilax
 * Smilax glauca
 * Smilax herbacea
 * Smilax pseudochina
 * Smilax pulverulenta
 * Smilax rotundifolia
 * Smilax tamnoides
 * Solanum
 * Solanum carolinense
 * Solanum ptycanthum
 * Solanum rostratum
 * Solidago
 * Solidago altissima
 * Solidago arguta
 * Solidago × asperula
 * Solidago bicolor
 * Solidago caesia
 * Solidago canadensis
 * Solidago cutleri
 * Solidago erecta
 * Solidago × erskinei
 * Solidago flexicaulis
 * Solidago gigantea
 * Solidago hispida
 * Solidago juncea
 * Solidago latissimifolia
 * Solidago macrophylla
 * Solidago nemoralis
 * Solidago odora
 * Solidago patula
 * Solidago puberula
 * Solidago rugosa
 * Solidago sempervirens
 * Solidago simplex
 * Solidago speciosa
 * Solidago squarrosa
 * Solidago uliginosa
 * Solidago ulmifolia
 * Sorbus
 * Sorbus americana
 * Sorbus decora
 * Sorghastrum nutans
 * Sparganium
 * Sparganium americanum
 * Sparganium androcladum
 * Sparganium angustifolium
 * Sparganium emersum
 * Sparganium eurycarpum
 * Sparganium fluctuans
 * Sparganium natans
 * Spartina
 * Spartina alterniflora
 * Spartina × caespitosa
 * Spartina cynosuroides
 * Spartina patens
 * Spartina pectinata
 * Spergularia canadensis
 * Spergularia salina
 * Spermolepis echinata
 * Sphenopholis
 * Sphenopholis intermedia
 * Sphenopholis nitida
 * Sphenopholis obtusata
 * Sphenopholis × pallens
 * Sphenopholis pensylvanica
 * Spiraea
 * Spiraea alba
 * Spiraea × billiardii
 * Spiraea septentrionalis
 * Spiraea tomentosa
 * Spiranthes
 * Spiranthes × borealis
 * Spiranthes casei
 * Spiranthes cernua
 * Spiranthes lacera
 * Spiranthes lucida
 * Spiranthes ochroleuca
 * Spiranthes odorata
 * Spiranthes romanzoffiana
 * Spiranthes tuberosa
 * Spiranthes vernalis
 * Spirodela polyrrhiza
 * Sporobolus
 * Sporobolus airoides
 * Sporobolus clandestinus
 * Sporobolus compositus
 * Sporobolus contractus
 * Sporobolus cryptandrus
 * Sporobolus heterolepis
 * Sporobolus neglectus
 * Sporobolus pyramidatus
 * Sporobolus vaginiflorus
 * Stachys
 * Stachys aspera
 * Stachys cordata
 * Stachys hyssopifolia
 * Stachys palustris
 * Stachys pilosa
 * Stachys tenuifolia
 * Staphylea trifolia
 * Stellaria
 * Stellaria alsine
 * Stellaria borealis
 * Stellaria corei
 * Stellaria longifolia
 * Stellaria longipes
 * Stellaria pubera
 * Stephanomeria exigua
 * Streptopus
 * Streptopus amplexifolius
 * Streptopus lanceolatus
 * Streptopus × oreopolus
 * Strophostyles helvola
 * Strophostyles umbellata
 * Stuckenia filiformis
 * Stuckenia pectinata
 * Stylosanthes biflora
 * Suaeda
 * Suaeda calceoliformis
 * Suaeda linearis
 * Suaeda maritima
 * Suaeda rolandii
 * Subularia aquatica
 * Symphiocarpos
 * Symphoricarpos albus
 * Symphoricarpos occidentalis
 * Symphoricarpos orbiculatus
 * Symphyotrichum
 * Symphyotrichum × amethystinum
 * Symphyotrichum boreale
 * Symphyotrichum ciliatum
 * Symphyotrichum ciliolatum
 * Symphyotrichum concolor
 * Symphyotrichum cordifolium
 * Symphyotrichum dumosum
 * Symphyotrichum ericoides
 * Symphyotrichum laeve
 * Symphyotrichum lanceolatum
 * Symphyotrichum lateriflorum
 * Symphyotrichum lowrieanum
 * Symphyotrichum novae-angliae
 * Symphyotrichum novi-belgii
 * Symphyotrichum oblongifolium
 * Symphyotrichum ontarionis
 * Symphyotrichum oolentangiense
 * Symphyotrichum patens
 * Symphyotrichum phlogifolium
 * Symphyotrichum pilosum
 * Symphyotrichum praealtum
 * Symphyotrichum prenanthoides
 * Symphyotrichum puniceum
 * Symphyotrichum racemosum
 * Symphyotrichum subulatum
 * Symphyotrichum tenuifolium
 * Symphyotrichum tradescantii
 * Symphyotrichum undulatum
 * Symphyotrichum urophyllum
 * Symplocarpus foetidus
 * Symplocos tinctoria

=T=
 * Taenidia integerrima
 * Taraxacum campylodes (syn. Taraxacum officinale)
 * Taxodium distichum
 * Taxus canadensis
 * Tephrosia virginiana
 * Teucrium canadense
 * Thalictrum
 * Thalictrum dasycarpum
 * Thalictrum dioicum
 * Thalictrum pubescens
 * Thalictrum revolutum
 * Thalictrum thalictroides
 * Thalictrum venulosum
 * Thaspium barbinode
 * Thaspium trifoliatum
 * Thelypteris
 * Thelypteris noveboracensis (See Parathelypteris noveboracensis)
 * Thelypteris palustris
 * Thelypteris simulata
 * Thermopsis villosa
 * Thuja occidentalis - G
 * Tiarella cordifolia
 * Tilia americana - G
 * Tipularia discolor
 * Torreyochloa pallida
 * Toxicodendron
 * Toxicodendron radicans
 * Toxicodendron rydbergii
 * Toxicodendron vernix
 * Tradescentia
 * Tradescantia occidentalis
 * Tradescantia ohiensis
 * Tradescantia subaspera
 * Tradescantia virginiana
 * Triadenum fraseri
 * Triadenum virginicum
 * Triantha glutinosa
 * Trichloris crinita
 * Trichomanes intricatum
 * Trichophorum
 * Trichophorum alpinum
 * Trichophorum cespitosum
 * Trichophorum clintonii
 * Trichophorum planifolium
 * Trichstema
 * Trichostema brachiatum
 * Trichostema dichotomum
 * Trichostema setaceum
 * Tridens flavus
 * Trientalis borealis
 * Triglochin maritima
 * Triglochin palustris
 * Trillium
 * Trillium cernuum
 * Trillium erectum
 * Trillium flexipes
 * Trillium grandiflorum
 * Trillium sessile
 * Trillium undulatum
 * Trillium viride
 * Triodanis biflora
 * Triodanis perfoliata
 * Triosteum
 * Triosteum angustifolium
 * Triosteum aurantiacum
 * Triosteum perfoliatum
 * Triphora trianthophora
 * Triplasis purpurea
 * Tripsacum dactyloides
 * Trisetum melicoides
 * Trisetum spicatum
 * Trollius laxus
 * Tsuga canadensis
 * Typha
 * Typha angustifolia
 * Typha × glauca
 * Typha latifolia

=U=
 * Ulmus
 * Ulmus americana - G
 * Ulmus rubra - G
 * Ulmus thomasii
 * Urtica
 * Urtica chamaedryoides
 * Urtica dioica
 * Urticularia
 * Utricularia cornuta
 * Utricularia geminiscapa
 * Utricularia gibba
 * Utricularia inflata
 * Utricularia intermedia
 * Utricularia juncea
 * Utricularia macrorhiza
 * Utricularia minor
 * Utricularia ochroleuca
 * Utricularia purpurea
 * Utricularia radiata
 * Utricularia resupinata
 * Utricularia striata
 * Utricularia subulata
 * Uvularia
 * Uvularia grandiflora
 * Uvularia perfoliata
 * Uvularia puberula
 * Uvularia sessilifolia

=V=
 * Vaccinium
 * Vaccinium angustifolium
 * Vaccinium × atlanticum
 * Vaccinium boreale
 * Vaccinium caesariense
 * Vaccinium cespitosum
 * Vaccinium corymbosum
 * Vaccinium × dobbinii
 * Vaccinium fuscatum
 * Vaccinium macrocarpon
 * Vaccinium × marianum
 * Vaccinium myrtilloides
 * Vaccinium oxycoccos
 * Vaccinium pallidum
 * Vaccinium stamineum
 * Vaccinium uliginosum
 * Vahlodea atropurpurea
 * Valeriana uliginosa
 * Valerianella chenopodiifolia
 * Valerianella umbilicata
 * Vallisneria americana
 * Veratrum
 * Veratrum hybridum
 * Veratrum virginicum
 * Veratrum viride
 * Verbena
 * Verbena bracteata
 * Verbena × deamii
 * Verbena × engelmannii
 * Verbena hastata
 * Verbena lasiostachys
 * Verbena × perriana
 * Verbena simplex
 * Verbena stricta
 * Verbena urticifolia
 * Verbesina alternifolia
 * Verbesina encelioides
 * Vernonia
 * Vernonia arkansana
 * Vernonia fasciculata
 * Vernonia gigantea
 * Vernonia noveboracensis
 * Veronica
 * Veronica americana
 * Veronica anagallis-aquatica
 * Veronica peregrina
 * Veronica scutellata
 * Veronica serpyllifolia
 * Veronicastrum virginicum
 * Viburnum
 * Viburnum acerifolium
 * Viburnum dentatum
 * Viburnum edule
 * Viburnum lantanoides
 * Viburnum lentago
 * Viburnum molle
 * Viburnum nudum
 * Viburnum opulus
 * Viburnum prunifolium
 * Viburnum rafinesqueanum
 * Viburnum recognitum
 * Vicia americana
 * Vicia caroliniana
 * Viola
 * Viola adunca
 * Viola affinis
 * Viola × bernardii
 * Viola bicolor
 * Viola × bissellii
 * Viola blanda
 * Viola × brauniae
 * Viola brittoniana
 * Viola canadensis
 * Viola × conjugens
 * Viola × consobrina
 * Viola × consocia
 * Viola × cordifolia
 * Viola cucullata
 * Viola × davisii
 * Viola × eclipes
 * Viola × filicetorum
 * Viola × greenmanii
 * Viola hastata
 * Viola hirsutula
 * Viola × hollickii
 * Viola × insolita
 * Viola labradorica
 * Viola lanceolata
 * Viola macloskeyi
 * Viola × malteana
 * Viola × melissifolia
 * Viola × mistura
 * Viola × modesta
 * Viola × mollicula
 * Viola × mulfordiae
 * Viola nephrophylla
 * Viola × notabilis
 * Viola novae-angliae
 * Viola × palmata
 * Viola palustris
 * Viola pedata
 * Viola × populifolia
 * Viola × porteriana
 * Viola × primulifolia
 * Viola pubescens
 * Viola × ravida
 * Viola × redacta
 * Viola renifolia
 * Viola × robinsoniana
 * Viola rostrata
 * Viola rotundifolia
 * Viola × ryoniae
 * Viola sagittata
 * Viola selkirkii
 * Viola septentrionalis
 * Viola × slavinii
 * Viola sororia
 * Viola striata
 * Viola sublanceolata
 * Vitis
 * Vitis aestivalis
 * Vitis labrusca
 * Vitis × novae-angliae
 * Vitis riparia
 * Vitis vulpina
 * Vittaria appalachiana
 * Vulpia octoflora

=W=
 * Waldsteinia fragarioides
 * Wisteria frutescens
 * Wolffia
 * Wolffia borealis
 * Wolffia brasiliensis
 * Wolffia columbiana
 * Woodsia
 * Woodsia alpina
 * Woodsia glabella
 * Woodsia ilvensis
 * Woodsia obtusa
 * Woodsia oregana
 * Woodwardia areolata
 * Woodwardia virginica

=X=
 * Xanthium strumarium
 * Xanthorhiza simplicissima
 * Xyris
 * Xyris difformis
 * Xyris montana
 * Xyris smalliana
 * Xyris torta

=Y=
 * Yucca filamentosa

=Z=
 * Zannichellia palustris
 * Zanthoxylum americanum
 * Zigadenus elegans
 * Zigadenus leimanthoides
 * Zizania aquatica
 * Zizania palustris
 * Zizia aptera
 * Zizia aurea
 * Zostera marina