Native Flowering Plants of Ontario

see also 

• Ontario native Conifers, Trees, Shrubs and Vines
• Ontario native Ferns
• Ontario native Grasses, Reeds and Sedges

Extracted from NatureServe Explorer http://www.natureserve.org/explorer/aboutd.htm

Acalypha rhomboidea Common Copperleaf
Achillea millefolium Common Yarrow	Achillea millefolium var. borealis Northern Yarrow	Achillea millefolium var. nigrescens Yarrow	Achillea millefolium var. occidentalis Western Yarrow	Achillea sibirica Siberian Yarrow
Acorus americanus Sweetflag
Actaea pachypoda White Baneberry	Actaea racemosa Black Bugbane	Actaea racemosa var. racemosa Black Cohosh	Actaea rubra Red Baneberry	Actaea rubra ssp. rubra Red Baneberry	Actaea x ludovici
Adenocaulon bicolor American Trail-plant
Adlumia fungosa Climbing Fumitory
Adonis annua Pheasant's Eye
Adoxa moschatellina Musk-root
Agalinis gattingeri Round-stem False Foxglove	Agalinis paupercula Small-flower False Foxglove	Agalinis paupercula var. borealis Small-flower False Foxglove	Agalinis paupercula var. paupercula Small-flower False Foxglove	Agalinis purpurea Large-purple False Foxglove	Agalinis skinneriana Pale False Foxglove
	Agalinis tenuifolia Slender False Foxglove	Agalinis tenuifolia var. macrophylla Bessey's False Foxglove	Agalinis tenuifolia var. parviflora Slender False Foxglove	Agalinis tenuifolia var. tenuifolia Slender False Foxglove
Agastache foeniculum Blue Giant-hyssop	Agastache nepetoides Yellow Giant-hyssop	Agastache scrophulariifolia Purple Giant-hyssop
Ageratina altissima White Snakeroot	Ageratina altissima var. altissima White Snakeroot
Agoseris glauca Pale Goat-chicory	Agoseris glauca var. glauca
Agrimonia gryposepala Tall Hairy Groovebur	Agrimonia parviflora Swamp Agrimony	Agrimonia pubescens Soft Groovebur	Agrimonia striata Woodland Agrimony
Alchemilla filicaulis ssp. vestita Thin-stem Lady's-mantle
Aletris farinosa White-tubed Colicroot
Alisma gramineum Narrow-leaf Water-plantain	Alisma subcordatum Broad-leaved Water-plantain	Alisma triviale Northern Water-plantain
Allium burdickii Narrow-leaved Wild Leek	Allium canadense Meadow Onion	Allium canadense var. canadense Meadow Garlic	Allium cernuum Nodding Onion	Allium cernuum var. cernuum Nodding Onion	Allium schoenoprasum Chives
	Allium schoenoprasum var. sibiricum Wild Chives	Allium stellatum Glade Onion	Allium tricoccum Small White Leek
Ambrosia artemisiifolia Annual Ragweed	Ambrosia artemisiifolia var. artemisiifolia Ragweed	Ambrosia artemisiifolia var. elatior Annual Ragweed	Ambrosia psilostachya Naked-spike Ambrosia	Ambrosia trifida Great Ragweed	Ambrosia trifida var. trifida
Amerorchis rotundifolia Round-leaved Orchis
Ammannia robusta Grand Redstem
Amorpha canescens Downy Indigobush	Amorpha fruticosa False Indigobush
Amphicarpaea bracteata American Hog-peanut	Amphicarpaea bracteata var. bracteata American Hog-peanut	Amphicarpaea bracteata var. comosa Hog-peanut
Anaphalis margaritacea Pearly Everlasting
Andromeda polifolia Bog Rosemary	Andromeda polifolia var. glaucophylla Bog Rosemary	Andromeda polifolia var. polifolia Bog-rosemary
Androsace occidentalis Western Rock-jasmine	Androsace septentrionalis Pygmy-flower Rock-jasmine	Androsace septentrionalis ssp. septentrionalis Pygmy-flower Rock-jasmine
Anemone canadensis Canada Anemone	Anemone cylindrica Long-fruited Anemone	Anemone multifida Hudson Bay Anemone	Anemone multifida var. hudsoniana Hudson Bay Anemone	Anemone multifida var. richardsiana Hudson Bay Anemone	Anemone parviflora Small-flower Anemone
	Anemone parviflora var. parviflora Small-flower Anemone	Anemone quinquefolia Wood Anemone	Anemone quinquefolia var. bifolia Wood Anemone	Anemone quinquefolia var. quinquefolia Nightcaps	Anemone richardsonii Yellow Anemone
	Anemone virginiana Virginia Anemone	Anemone virginiana var. cylindroidea Tall Thimbleweed	Anemone virginiana var. riparia River Anemone	Anemone virginiana var. virginiana Tall Thimbleweed
Angelica atropurpurea Great Angelica	Angelica lucida Seacoast Angelica	Angelica venenosa Hairy Angelica
Antennaria alpina Alpine Pussytoes	Antennaria howellii Small Pussytoes	Antennaria howellii ssp. canadensis Small Pussytoes	Antennaria howellii ssp. howellii Small Pussytoes	Antennaria howellii ssp. neodioica Small Pussytoes	Antennaria howellii ssp. petaloidea Small Pussytoes
	Antennaria microphylla Small-leaf Cat's-foot	Antennaria neglecta Field Pussytoes	Antennaria parlinii Parlin's Pussytoes	Antennaria parlinii ssp. fallax Parlin's Pussytoes	Antennaria parlinii ssp. parlinii Parlin's Pussytoes
	Antennaria parvifolia Nuttall's Pussytoes	Antennaria pulcherrima Handsome Pussytoes	Antennaria rosea Rosy Pussytoes	Antennaria rosea ssp. rosea Rosy Pussytoes
Apios americana American Groundnut
Aplectrum hyemale Puttyroot (orchid)
Apocynum androsaemifolium Spreading Dogbane	Apocynum androsaemifolium ssp. androsaemifolium Spreading Dogbane	Apocynum androsaemifolium var. incanum Spreading Dogbane	Apocynum cannabinum Clasping-leaf Dogbane	Apocynum x floribundum Hybrid
Aquilegia brevistyla Small-flower Columbine	Aquilegia canadensis Wild Columbine
Arabidopsis salsuginea Saltwater Cress
Arabis alpina Alpine Rockcress	Arabis arenicola Arctic Rockcress	Arabis canadensis Sicklepod	Arabis drummondii Drummond's Rockcress	Arabis glabra Tower-mustard	Arabis hirsuta Western Hairy Rockcress
	Arabis hirsuta var. adpressipilis Hairy Rockcress	Arabis hirsuta var. pycnocarpa Western Hairy Rockcress	Arabis holboellii Holboell's Rockcress	Arabis holboellii var. retrofracta Holboell's Rockcress	Arabis laevigata Smooth Rockcress
	Arabis laevigata var. laevigata Smooth Rockcress	Arabis lyrata Lyreleaf Rockcress	Arabis lyrata var. kamchatica Lyre-leaf Rockcress	Arabis lyrata var. lyrata Lyre-leaf Rockcress	Arabis shortii Short's Rockcress
	Arabis x divaricarpa
Aralia hispida Bristly Sarsaparilla	Aralia nudicaulis Wild Sarsaparilla	Aralia racemosa American Spikenard	Aralia racemosa ssp. racemosa American Spikenard
Arceuthobium americanum American Mistletoe	Arceuthobium pusillum Dwarf Mistletoe
Arctostaphylos alpina Alpine Manzanita	Arctostaphylos alpina var. alpina Alpine Manzanita	Arctostaphylos rubra Red Manzanita	Arctostaphylos uva-ursi Bearberry
Arenaria humifusa Creeping Sandwort
Arethusa bulbosa Swamp-pink (orchid)
Argentina anserina Silverweed	Argentina egedii Egede's Cinquefoil	Argentina egedii ssp. egedii Pacific Silverweed
Arisaema dracontium Green Dragon	Arisaema triphyllum Swamp Jack-in-the-pulpit	Arisaema triphyllum ssp. pusillum Small Jack-in-box-pulpit	Arisaema triphyllum ssp. triphyllum Jack-in-the-Pulpit
Armeria maritima Western Thrift	Armeria maritima ssp. sibirica Sea Pink
Armoracia lacustris Lake-cress
Arnica angustifolia Narrowleaf Leopardbane	Arnica angustifolia ssp. angustifolia Narrowleaf Leopardbane	Arnica chamissonis Leafy Arnica	Arnica chamissonis ssp. foliosa Leafy Leopardbane	Arnica cordifolia Heart-leaved Arnica	Arnica lonchophylla Northern Arnica
	Arnica lonchophylla ssp. lonchophylla Seep Leopardbane
Arnoglossum plantagineum Indian-plantain
Artemisia campestris Pacific Wormwood	Artemisia campestris ssp. borealis Boreal Wormwood	Artemisia campestris ssp. caudata Beach Wormwood	Artemisia campestris var. borealis Pacific Wormwood	Artemisia campestris var. scouleriana	Artemisia dracunculus Dragon Wormwood
	Artemisia frigida Prairie Sagebrush	Artemisia ludoviciana White Sagebrush	Artemisia ludoviciana ssp. ludoviciana White Sagebrush	Artemisia tilesii Tilesius Wormwood	Artemisia tilesii ssp. elatior
Aruncus dioicus var. dioicus Common Goat's-beard
Asarum canadense Canada Wild-ginger
Asclepias exaltata Poke Milkweed	Asclepias hirtella Green Milkweed	Asclepias incarnata Swamp Milkweed	Asclepias incarnata ssp. incarnata Purple Milkweed	Asclepias incarnata ssp. pulchra Swamp Milkweed	Asclepias ovalifolia Dwarf Milkweed
	Asclepias purpurascens Purple Milkweed	Asclepias quadrifolia Whorled Milkweed	Asclepias sullivantii Prairie Milkweed	Asclepias syriaca Kansas Milkweed	Asclepias tuberosa Butterfly Milkweed
	Asclepias tuberosa ssp. interior Butterflyweed	Asclepias tuberosa ssp. tuberosa Butterfly Milkweed	Asclepias variegata White Milkweed	Asclepias verticillata Whorled Milkweed	Asclepias viridiflora Green Milkweed
Aster alpinus Alpine Aster	Aster alpinus var. vierhapperi Alpine Aster
Astragalus adsurgens Rattle Milk-vetch	Astragalus adsurgens var. robustior Rattle Milk-vetch	Astragalus agrestis Don Meadow Milk-vetch	Astragalus alpinus Alpine Milk-vetch	Astragalus alpinus var. alpinus Alpine Milk-vetch	Astragalus americanus American Milk-vetch
	Astragalus australis Indian Milk-vetch	Astragalus canadensis Canadian Milk-vetch	Astragalus canadensis var. canadensis Canadian Milk-vetch	Astragalus eucosmus Pretty Milk-vetch	Astragalus neglectus Cooper's Milk-vetch
	Astragalus tenellus Loose-flower Milk-vetch
Atriplex glabriuscula Northeastern Saltbush	Atriplex patula Halberd-leaf Orache	Atriplex prostrata Creeping Saltbush	Atriplex subspicata Orache
Aureolaria flava Smooth Yellow False Foxglove	Aureolaria flava var. flava	Aureolaria flava var. macrantha	Aureolaria pedicularia Fernleaf Yellow False Foxglove	Aureolaria pedicularia var. intercedens Fernleaf Yellow False Foxglove	Aureolaria pedicularia var. pedicularia Fernleaf Yellow False Foxglove
	Aureolaria virginica Downy False-foxglove
Baptisia alba Prairie False Indigo	Baptisia alba var. macrophylla White Wild Indigo	Baptisia tinctoria Yellow Wild Indigo
Barbarea orthoceras American Winter-cress
Bartonia paniculata Twining Bartonia	Bartonia paniculata ssp. paniculata	Bartonia virginica Yellow Screwstem	Bartsia alpina Alpine Bartsia
Berula erecta Wild Parsnip
Bidens cernua Nodding Beggarticks	Bidens connata Purple-stem Swamp Beggarticks	Bidens coronata Tickseed Sunflower	Bidens discoidea Swamp Beggarticks	Bidens frondosa Devil's Beggarticks	Bidens hyperborea Estuary Beggarticks
	Bidens hyperborea var. hyperborea Estuary Beggarticks	Bidens tripartita Three-lobe Beggarticks	Bidens vulgata Tall Bur-marigold
Blephilia ciliata Downy Woodmint	Blephilia hirsuta Hairy Woodmint	Blephilia hirsuta var. hirsuta Hairy Woodmint
Boehmeria cylindrica False Nettle
Brasenia schreberi Watershield
Braya humilis Low Braya
Buchnera americana Bluehearts
Cakile edentula American Sea-rocket	Cakile edentula ssp. edentula Sea-rocket	Cakile edentula var. lacustris American Sea-rocket
Calla palustris Wild Calla
Callitriche hermaphroditica Autumnal Water-starwort	Callitriche heterophylla Large Water-starwort	Callitriche heterophylla ssp. heterophylla Northern Water-starwort	Callitriche palustris Vernal Water Starwort
Calopogon tuberosus Tuberous Grass-pink	Calopogon tuberosus var. tuberosus Tuberous Grass-pink
Caltha natans Floating Marsh-marigold	Caltha palustris Marsh-marigold	Caltha palustris var. palustris Marsh-marigold
Calypso bulbosa Fairy Slipper	Calypso bulbosa var. americana Fairy Slipper
Calystegia sepium Hedge Bindweed	Calystegia sepium ssp. americana American Bindweed	Calystegia sepium ssp. angulata Wild Morning Glory	Calystegia sepium ssp. erratica Wild Morning Glory	Calystegia sepium ssp. sepium Hedge False Bindweed	Calystegia spithamaea Low Bindweed
	Calystegia spithamaea ssp. spithamaea
Camassia scilloides Wild Hyacinth
Campanula aparinoides Marsh Bellflower	Campanula rotundifolia American Harebell
Campanulastrum americanum Tall Bellflower
Campsis radicans Trumpet-creeper
Canadanthus modestus Great Northern Aster
Cardamine bulbosa Bulbous Bitter-cress	Cardamine concatenata Cutleaf Toothwort	Cardamine diphylla Two-leaf Toothwort	Cardamine douglassii Purple Cress	Cardamine maxima Large Toothwort	Cardamine parviflora Small-flower Bittercress
	Cardamine pensylvanica Pennsylvania Bittercress	Cardamine pratensis Cuckoo-flower	Cardamine pratensis var. angustifolia Cuckoo-flower	Cardamine x anomala
Castilleja coccinea Scarlet Indian-paintbrush	Castilleja miniata Greater Red Indian-paintbrush	Castilleja miniata ssp. miniata Greater Red Indian-paintbrush	Castilleja raupii Raup's Indian-paintbrush	Castilleja septentrionalis Labrador Indian-paintbrush
Catabrosa aquatica Brook Grass	Catabrosa aquatica var. aquatica Brook Grass	Catabrosa aquatica var. laurentiana Brook Grass
Caulophyllum giganteum Blue Cohosh	Caulophyllum thalictroides Blue Cohosh
Celastrus scandens Climbing Bittersweet
Cenchrus longispinus Long-spine Sandbur
Centaurea nigra Black Starthistle
Cerastium alpinum Alpine Chickweed	Cerastium alpinum ssp. alpinum Alpine Chickweed	Cerastium alpinum ssp. lanatum Alpine Chickweed	Cerastium alpinum var. alpinum Alpine Chickweed	Cerastium alpinum var. glanduliferum Alpine Chickweed	Cerastium alpinum var. lanatum Alpine Chickweed
	Cerastium arvense Mouse-ear Chickweed	Cerastium arvense ssp. strictum Field Chickweed	Cerastium arvense ssp. velutinum Field Chickweed	Cerastium arvense var. villosum Field Chickweed	Cerastium beeringianum Bering Sea Chickweed
	Cerastium brachypodum Mouse-ear Chickweed	Cerastium nigrescens Black Mouse-ear Chickweed	Cerastium nutans Nodding Chickweed	Cerastium nutans var. nutans Nodding Chickweed
Ceratophyllum demersum Common Hornwort	Ceratophyllum echinatum Prickly Hornwort
Chaerophyllum procumbens Spreading Chervil	Chaerophyllum procumbens var. procumbens Spreading Chervil	Chaerophyllum procumbens var. shortii Wild Chervil
Chamaedaphne calyculata Leatherleaf
Chamaelirium luteum Devil's-bit
Chamaerhodos erecta Rose Chamaerhodos
Chamaesyce nutans Eyebane Broomspurge	Chamaesyce polygonifolia Seaside Spurge	Chamaesyce serpyllifolia ssp. serpyllifolia Thyme-leaf Broomspurge	Chamaesyce vermiculata Worm Seeded Spurge
Chelone glabra White Turtlehead
Chenopodium album var. missouriense Missouri Goosefoot	Chenopodium album var. stevensii White Goosefoot	Chenopodium berlandieri Pit-seed Goosefoot	Chenopodium berlandieri var. boscianum Bosc's Goosefoot	Chenopodium berlandieri var. bushianum	Chenopodium berlandieri var. zschackii Pit-seed Goosefoot
	Chenopodium capitatum Strawberry Goosefoot	Chenopodium foggii Fogg's Goosefoot	Chenopodium leptophyllum Narrowleaf Goosefoot	Chenopodium pratericola Desert Goosefoot	Chenopodium salinum Rocky Mountain Goosefoot
	Chenopodium simplex Giant-seed Goosefoot	Chenopodium standleyanum Standley's Goosefoot
Chimaphila maculata Spotted Wintergreen	Chimaphila umbellata Common Wintergreen	Chimaphila umbellata ssp. cisatlantica Common Wintergreen	Chimaphila umbellata ssp. occidentalis Wesern Pipsissewa
Chrysosplenium americanum American Golden-saxifrage	Chrysosplenium tetrandrum Northern Golden-carpet
Cicuta bulbifera Bulb-bearing Water-hemlock	Cicuta maculata Spotted Water-hemlock	Cicuta maculata var. angustifolia Spotted Water-hemlock	Cicuta maculata var. maculata Southern Poison-hemlock	Cicuta virosa Mackenzie's Water-hemlock
Circaea alpina Small Enchanter's-nightshade	Circaea alpina ssp. alpina Small Enchanter's-nightshade	Circaea lutetiana Southern Broadleaf Enchanter's-nightshade	Circaea lutetiana ssp. canadensis Intermediate Enchanter's-nightshade	Circaea x intermedia Intermediate Enchanter's-nightshade
Cirsium discolor Field Thistle	Cirsium drummondii Drummond's Thistle	Cirsium flodmanii Flodman Thistle	Cirsium hillii Hill's Thistle	Cirsium muticum Swamp Thistle	Cirsium pitcheri Dune Thistle
Cladium mariscoides Twig-rush
Claytonia caroliniana Carolina Springbeauty	Claytonia caroliniana var. caroliniana Carolina Springbeauty	Claytonia virginica Narrowleaf Springbeauty	Claytonia virginica var. virginica Narrowleaf Springbeauty
Clematis occidentalis Purple Clematis	Clematis occidentalis var. occidentalis Purple Clematis	Clematis virginiana Virginia Virgin-bower
Clinopodium arkansanum Low Calamint	Clinopodium vulgare Field Basil
Clintonia borealis Clinton Lily
Cochlearia groenlandica Greenland Cochlearia
Coeloglossum viride Long-bract Green Orchis	Coeloglossum viride var. virescens Long-bract Green Orchis	Coeloglossum viride var. viride Long-bract Green Orchis
Collinsia parviflora Small-flower Blue-eyed Mary	Collinsia verna Spring Blue-eyed Mary
Collinsonia canadensis Canada Horse-balm
Collomia linearis Narrow-leaved Collomia
Comandra umbellata Umbellate Bastard Toad-flax	Comandra umbellata ssp. umbellata Umbellate Bastard Toad-flax
Comarum palustre Marsh Cinquefoil
Comptonia peregrina Sweetfern
Conioselinum chinense Chinese Hemlock-parsley
Conopholis americana American Cancer-root
Conyza canadensis Canada Horseweed	Conyza canadensis var. canadensis Canada Horseweed	Conyza ramosissima Dwarf Conyza
Coptis trifolia Goldthread	Coptis trifolia ssp. groenlandica Goldthread
Corallorhiza maculata Spotted Coralroot	Corallorhiza maculata var. maculata Spotted Coralroot	Corallorhiza maculata var. occidentalis Spotted Coralroot	Corallorhiza odontorhiza Autumn Coralroot	Corallorhiza odontorhiza var. odontorhiza Autumn Coralroot	Corallorhiza odontorhiza var. pringlei Autumn Coralroot
	Corallorhiza striata Striped Coralroot	Corallorhiza striata var. striata Striped Coralroot	Corallorhiza trifida Early Coralroot
Coreopsis lanceolata Sand Coreopsis	Coreopsis tinctoria var. tinctoria Golden Tickseed	Coreopsis tripteris Tall Tickseed
Corispermum americanum American Bugseed	Corispermum americanum var. americanum American Bugseed	Corispermum hookeri Hooker's Bugseed	Corispermum hookeri var. hookeri Hooker's Bugseed	Corispermum pallasii Pallas' Bugseed	Corispermum villosum Hairy Bugseed
Corydalis aurea Golden Corydalis	Corydalis aurea ssp. aurea Golden Corydalis	Corydalis flavula Yellow Corydalis	Corydalis sempervirens Pale Corydalis
Crassula aquatica Water Pygmyweed
Croton capitatus var. capitatus Woolly Croton
Cryptotaenia canadensis Canada Honewort
Cuscuta cephalanthi Button-bush Dodder	Cuscuta coryli Hazel Dodder	Cuscuta gronovii Gronovius Dodder	Cuscuta gronovii var. gronovii Gronovius Dodder	Cuscuta pentagona var. pentagona Field Dodder	Cuscuta polygonorum Smartweed Dodder
Cycloloma atriplicifolium Winged Pigweed
Cynoglossum virginianum Wild Comfrey	Cynoglossum virginianum var. boreale Northern Wild Comfrey
Cypripedium acaule Pink Lady's-slipper	Cypripedium arietinum Ram's-head Lady's-slipper	Cypripedium candidum Small White Lady's-slipper	Cypripedium parviflorum American Yellow Lady's-slipper	Cypripedium parviflorum var. makasin Northern Yellow Lady's-slipper	Cypripedium parviflorum var. pubescens Large Yellow Lady's-slipper
	Cypripedium passerinum Sparrow's-egg Lady's-slipper	Cypripedium reginae Showy Lady's-slipper	Cypripedium x andrewsii Andrews' Lady-slipper (a Hybrid)	Cypripedium x favillianum	Cypripedium x landonii
Dalea candida White Prairie-clover	Dalea candida var. candida White Prairie-clover	Dalea purpurea Purple Prairie-clover	Dalea purpurea var. purpurea Purple Prairie-clover
Dalibarda repens Robin-run-away
Dasiphora fruticosa Golden-Hardhack (Potentilla fruticosa)	Dasiphora fruticosa ssp. floribunda Shrubby Cinquefoil
Decodon verticillatus Hairy Swamp Loosestrife
Dendranthema arcticum Arctic Daisy	Dendranthema arcticum ssp. polare Arctic Daisy
Descurainia incana Mountain Tansy-mustard	Descurainia incana ssp. incana Richardson's Tansy-mustard	Descurainia pinnata Pinnate Tansy-mustard	Descurainia pinnata ssp. brachycarpa Pinnate Tansy-mustard	Descurainia pinnata ssp. filipes Pinnate Tansy-mustard
Desmodium canadense Showy Tick-trefoil	Desmodium canescens Hoary Tick-trefoil	Desmodium ciliare Hairy Small-leaf Tick-trefoil	Desmodium ciliare var. ciliare Hairy Small-leaf Tick-trefoil	Desmodium cuspidatum Toothed Tick-trefoil	Desmodium cuspidatum var. cuspidatum Large-bract Tick-trefoil
	Desmodium cuspidatum var. longifolium Toothed Tick-trefoil	Desmodium glutinosum Large Tick-trefoil	Desmodium illinoense Illinois Tick-trefoil	Desmodium marilandicum Maryland Tick-trefoil	Desmodium nudiflorum Bare-stemmed Tick-trefoil
	Desmodium paniculatum Narrowleaf Tick-trefoil	Desmodium paniculatum var. paniculatum Narrowleaf Tick-trefoil	Desmodium rotundifolium Prostrate Tick-trefoil	Desmodium sessilifolium Sessileleaf Tick-trefoil
Dicentra canadensis Squirrel-corn	Dicentra cucullaria Dutchman's Breeches
Diervilla lonicera Northern Bush-honeysuckle
Digitaria cognata Mountain Hairgrass	Digitaria cognata var. cognata Mountain Hairgrass
Dioscorea quaternata Fourleaf Yam
Dirca palustris Eastern Leatherwood
Distichlis spicata Seashore Saltgrass
Doellingeria umbellata Flat-top White Aster	Doellingeria umbellata var. pubens Flat-top White Aster	Doellingeria umbellata var. umbellata Parasol Whitetop
Draba alpina Alpine Whitlow-grass	Draba arabisans Rock Whitlow-grass	Draba aurea Golden Draba	Draba cana Hoary Draba	Draba cinerea Gray-leaf Whitlow-grass	Draba cinerea var. cinerea Gray-leaf Whitlow-grass
	Draba glabella Rock Whitlow-grass	Draba glabella var. glabella Rock Whitlow-grass	Draba glabella var. megasperma Rock Whitlow-grass	Draba incana Hoary Whitlow-grass	Draba incana var. incana Hoary Whitlow-grass
	Draba lactea Milky Whitlow-grass	Draba nemorosa Wood Whitlow-grass	Draba nemorosa var. leiocarpa	Draba nemorosa var. nemorosa Wood Whitlow-grass	Draba nivalis Yellow Arctic Whitlow-grass
	Draba nivalis var. nivalis	Draba norvegica Norwegian Whitlow-grass	Draba norvegica var. norvegica Norwegian Whitlow-grass	Draba reptans Carolina Whitlow-grass
Dracocephalum parviflorum American Dragonhead
Drosera anglica English Sundew	Drosera intermedia Spoon-leaved Sundew	Drosera linearis Slenderleaf Sundew	Drosera rotundifolia Roundleaf Sundew	Drosera rotundifolia var. rotundifolia Roundleaf Sundew
Dryas drummondii Yellow Mountain-avens	Dryas drummondii var. drummondii Yellow Mountain-avens	Dryas integrifolia Entire-leaved Mountain-avens	Dryas integrifolia ssp. integrifolia Entire-leaved Mountain-avens
Echinacea pallida Pale Purple Coneflower
Echinocystis lobata Wild Mock-cucumber
Eclipta prostrata False Daisy
Elatine americana American Waterwort	Elatine minima Small Waterwort	Elatine triandra Longstem Water-wort
Elodea canadensis Broad Waterweed	Elodea nuttallii Nuttall's Waterweed
Empetrum eamesii Rock Crowberry	Empetrum eamesii ssp. atropurpureum Purple Crowberry	Empetrum nigrum Black Crowberry	Empetrum nigrum ssp. hermaphroditum Black Crowberry
Endolepis dioica Suckley's Saltbush
Enemion biternatum False Rue-anemone
Epifagus virginiana Beechdrops
Epigaea repens Trailing Arbutus
Epilobium angustifolium Fireweed	Epilobium angustifolium ssp. angustifolium Fireweed	Epilobium angustifolium ssp. circumvagum Fireweed	Epilobium brachycarpum Panicled Willowherb	Epilobium ciliatum Hairy Willowherb	Epilobium ciliatum ssp. ciliatum Hairy Willowherb
	Epilobium ciliatum ssp. glandulosum Hairy Willowherb	Epilobium ciliatum ssp. watsonii Fringed Willowherb	Epilobium coloratum Purpleleaf Willowherb	Epilobium davuricum Dahuria Willowherb	Epilobium hornemannii Hornemann's Willowherb
	Epilobium latifolium River Beauty	Epilobium leptophyllum Linear-leaved Willowherb	Epilobium palustre Marsh Willowherb	Epilobium saximontanum Rocky Mountain Willowherb	Epilobium strictum Downy Willowherb
	Epilobium x wisconsinense
Erechtites hieraciifolia Fireweed	Erechtites hieraciifolia var. hieraciifolia American Burnweed
Erigenia bulbosa Harbinger-of-Spring
Erigeron acris Bitter Fleabane	Erigeron acris ssp. politus Northern Daisy	Erigeron annuus White-top Fleabane	Erigeron elatus Tall Bitter Fleabane	Erigeron glabellus Smooth Fleabane	Erigeron glabellus var. glabellus
	Erigeron humilis Low Fleabane	Erigeron hyssopifolius Daisy Fleabane	Erigeron hyssopifolius var. hyssopifolius	Erigeron lonchophyllus Short-ray Fleabane	Erigeron philadelphicus Philadelphia Fleabane
	Erigeron philadelphicus var. philadelphicus Philadelphia Fleabane	Erigeron philadelphicus var. provancheri Philadelphia Fleabane	Erigeron pulchellus Robin's-plantain	Erigeron pulchellus var. pulchellus Robin's-plantain	Erigeron strigosus Daisy Fleabane
	Erigeron strigosus var. strigosus Daisy Fleabane	Erigeron uniflorus One-flower Fleabane	Erigeron uniflorus ssp. eriocephalus One-flower Fleabane
Eriocaulon aquaticum Seven-angle Pipewort
Erysimum inconspicuum Small-flower Prairie Wallflower	Erysimum inconspicuum var. inconspicuum Small-flower Prairie Wallflower
Erythronium albidum White Trout-lily	Erythronium americanum Yellow Trout-lily	Erythronium americanum ssp. americanum Trout-lily
Eupatorium altissimum Tall Boneset	Eupatorium maculatum Spotted Joe-pyeweed	Eupatorium maculatum var. bruneri Joe-pyeweed	Eupatorium maculatum var. foliosum Spotted Joe-pyeweed	Eupatorium maculatum var. maculatum Spotted Joe-pyeweed	Eupatorium perfoliatum Common Boneset
	Eupatorium perfoliatum var. perfoliatum	Eupatorium purpureum Sweet Joe-pyeweed	Eupatorium purpureum var. purpureum Sweet Joe-pyeweed	Eupatorium x truncatum
Euphorbia commutata Wood Spurge	Euphorbia corollata Flowering Spurge	Euphorbia davidii David's Spurge	Euphorbia spathulata Reticulate-seeded Spurge
Euphrasia hudsoniana Hudson's Eyebright	Euphrasia hudsoniana var. hudsoniana	Euphrasia hudsoniana var. ramosior Hudson's Eyebright	Euphrasia nemorosa Common Eyebright	Euphrasia vinacea Glacier Eyebright
Eurybia divaricata White Wood-aster	Eurybia macrophylla Largeleaf Wood-aster	Eurybia radula Rough Wood-aster	Eurybia schreberi Schreiber's Aster
Euthamia caroliniana Slender Fragrant Goldenrod	Euthamia graminifolia Flat-top Fragrant Goldenrod	Euthamia graminifolia var. graminifolia Flat-top Fragrant Goldenrod	Euthamia gymnospermoides Viscid Bushy Golden-rod
Floerkea proserpinacoides False Mermaidweed
Fragaria vesca Woodland Strawberry	Fragaria vesca ssp. americana American Woodland Strawberry	Fragaria virginiana Virginia Strawberry	Fragaria virginiana ssp. glauca Virginia Strawberry	Fragaria virginiana ssp. virginiana Virginia Strawberry
Frasera caroliniensis Carolina Gentian
Gaillardia pulchella var. pulchella Fire-wheel Blanket-flower
Galearis spectabilis Showy Orchis
Galium aparine Catchweed Bedstraw	Galium asprellum Rough Bedstraw	Galium boreale Northern Bedstraw	Galium brevipes Limestone Swamp Bedstraw	Galium circaezans Wild Licorice	Galium circaezans var. circaezans Licorice Bedstraw
	Galium circaezans var. hypomalacum	Galium concinnum Shining Bedstraw	Galium kamtschaticum Boreal Bedstraw	Galium labradoricum Bog Bedstraw	Galium lanceolatum Torrey's Wild Licorice
	Galium obtusum Bluntleaf Bedstraw	Galium obtusum ssp. obtusum Large Marsh Bedstraw	Galium palustre Marsh Bedstraw	Galium pilosum Hairy Bedstraw	Galium pilosum var. pilosum Hairy Bedstraw
	Galium tinctorium Stiff Marsh Bedstraw	Galium trifidum Small Bedstraw	Galium trifidum ssp. subbiflorum Three-petal Bedstraw	Galium trifidum ssp. trifidum Small Bedstraw	Galium triflorum Sweet-scent Bedstraw
Gamochaeta purpurea Purple Cudweed
Gaultheria hispidula Creeping Snowberry	Gaultheria procumbens Teaberry
Gaura biennis Biennial Gaura
Gentiana alba Yellow Gentian	Gentiana andrewsii Fringe-top Bottle Gentian	Gentiana andrewsii var. andrewsii Closed Gentian	Gentiana linearis Narrowleaf Gentian	Gentiana puberulenta Downy Gentian	Gentiana rubricaulis Closed Gentian
	Gentiana x billingtonii	Gentiana x grandilacustris	Gentiana x pallidocyanea
Gentianella amarella Northern Gentian	Gentianella amarella ssp. acuta Autumn Dwarf Gentian	Gentianella propinqua Four-part Gentian	Gentianella propinqua ssp. propinqua Four-part Gentian	Gentianella quinquefolia Stiff Gentian	Gentianella quinquefolia ssp. occidentalis Stiff Gentian
	Gentianella quinquefolia ssp. quinquefolia	Gentianella tenella Dane's Gentian	Gentianella tenella ssp. tenella Slender Gentian
Gentianopsis crinita Fringed Gentian	Gentianopsis detonsa Sheared Gentian	Gentianopsis detonsa ssp. raupii Sheared Gentian	Gentianopsis macounii Macoun's Gentian	Gentianopsis nesophila Island Gentian	Gentianopsis procera Lesser Fringed Gentian
Geocaulon lividum Northern Comandra
Geranium bicknellii Bicknell's Northern Crane's-bill	Geranium bicknellii var. bicknellii Bicknell's Northern Crane's-bill	Geranium bicknellii var. longipes Bicknell's Northern Crane's-bill	Geranium carolinianum Carolina Crane's-bill	Geranium carolinianum var. confertiflorum Carolina Cranesbill	Geranium carolinianum var. sphaerospermum Carolina Crane's-bill
	Geranium maculatum Wild Crane's-bill
Geum aleppicum Yellow Avens	Geum calthifolium Caltha-leaf Avens	Geum canadense White Avens	Geum canadense var. camporum White Avens	Geum canadense var. canadense White Avens	Geum laciniatum Rough Avens
	Geum laciniatum var. laciniatum Rough Avens	Geum laciniatum var. trichocarpum Rough Avens	Geum macrophyllum Largeleaf Avens	Geum macrophyllum var. macrophyllum Largeleaf Avens	Geum macrophyllum var. perincisum Large-leaved Avens
	Geum rivale Purple Avens	Geum triflorum Prairie-smoke	Geum triflorum var. triflorum Prairie-smoke	Geum vernum Spring Avens	Geum virginianum Pale Avens
	Geum x aurantiacum	Geum x pulchrum
Glaux maritima Sea Milkwort	Glaux maritima ssp. maritima Sea Milkwort	Glaux maritima ssp. obtusifolia Sea Milkwort
Glycyrrhiza lepidota Wild Licorice
Gnaphalium obtusifolium Fragrant Cudweed	Gnaphalium obtusifolium var. obtusifolium Fragrant Cudweed	Gnaphalium viscosum Winged Cudweed
Goodyera oblongifolia Giant Rattlesnake-plantain	Goodyera pubescens Downy Rattlesnake-plantain	Goodyera repens Dwarf Rattlesnake-plantain	Goodyera tesselata Checkered Rattlesnake-plantain
Gratiola aurea Golden Hedge-hyssop	Gratiola neglecta Clammy Hedge-hyssop
Grindelia nuda Curly-top Gumweed	Grindelia nuda var. nuda Curly-top Gumweed	Grindelia squarrosa var. quasiperennis	Grindelia squarrosa var. serrulata Tar Weed
Hackelia deflexa Northern Stickseed	Hackelia deflexa var. americana Northern Stickseed	Hackelia floribunda Davis Mountain Stickseed	Hackelia virginiana Virginia Stickseed
Halenia deflexa Spurred Gentian	Halenia deflexa ssp. deflexa Spurred Gentian
Hedeoma hispida Rough False Pennyroyal	Hedeoma pulegioides American False Pennyroyal
Hedysarum alpinum Alpine Sweet-vetch	Hedysarum boreale Boreal Sweet-vetch	Hedysarum boreale ssp. mackenziei Boreal Sweet-vetch
Helenium autumnale Common Sneezeweed	Helenium autumnale var. autumnale Common Sneezeweed	Helenium autumnale var. montanum Autumn Sneezeweed
Helianthemum bicknellii Plains Frostweed	Helianthemum canadense Canada Frostweed
Helianthus couplandii Coupland's Sunflower	Helianthus decapetalus Thin-leaved Sunflower	Helianthus divaricatus Woodland Sunflower	Helianthus giganteus Tall Sunflower	Helianthus nuttallii Nuttall's Sunflower	Helianthus nuttallii ssp. nuttallii
	Helianthus nuttallii ssp. rydbergii Nuttall's Sunflower	Helianthus pauciflorus Stiff Sunflower	Helianthus pauciflorus ssp. subrhomboideus	Helianthus strumosus Pale-leaf Sunflower	Helianthus tuberosus Jerusalem Artichoke
	Helianthus x luxurians Sunflower
Heliopsis helianthoides Smooth Oxeye	Heliopsis helianthoides var. helianthoides Smooth Oxeye	Heliopsis helianthoides var. occidentalis Smooth Oxeye	Heliopsis helianthoides var. scabra
Hepatica nobilis Round-lobe Hepatica	Hepatica nobilis var. acuta Sharp-lobed Hepatica	Hepatica nobilis var. obtusa Round-leaved Liverleaf
Heracleum maximum Cow-parsnip
Heterotheca villosa Hairy False Goldenaster	Heterotheca villosa var. ballardii Hairy False Goldenaster
Heuchera americana American Alumroot	Heuchera americana var. americana American Alumroot	Heuchera richardsonii Richardson's Alumroot
Hibiscus laevis Halberd-leaf Rosemallow	Hibiscus moscheutos Swamp Rosemallow	Hibiscus moscheutos ssp. moscheutos Eastern Rosemallow
Hieracium canadense Canada Hawkweed	Hieracium canadense var. canadense Canada Hawkweed	Hieracium gronovii Hairy Hawkweed	Hieracium kalmii Kalm's Hawkweed	Hieracium kalmii var. fasciculatum Kalm's Hawkweed	Hieracium kalmii var. kalmii Kalm's Hawkweed
	Hieracium longipilum Hairy Hawkweed	Hieracium marianum Maryland Hawkweed	Hieracium paniculatum Panicled Hawkweed	Hieracium scabrum Rough Hawkweed	Hieracium scabrum var. scabrum Rough Hawkweed
	Hieracium scabrum var. tonsum Rough Hawkweed	Hieracium venosum Rattlesnake Hawkweed	Hieracium x dutillyanum
Hippuris tetraphylla Fourleaf Mare's-tail	Hippuris vulgaris Common Mare's-tail
Honckenya peploides Seabeach Sandwort	Honckenya peploides ssp. diffusa Seabeach Sandwort	Honckenya peploides ssp. peploides Seabeach Sandwort
Houstonia caerulea Quaker-ladies	Houstonia canadensis Longleaf Bluets	Houstonia longifolia Longleaf Bluet
Hudsonia tomentosa Sand-heather	Hudsonia tomentosa var. intermedia Long-pedicelled Sand-heather	Hudsonia tomentosa var. tomentosa Sand-heather
Hybanthus concolor Green Violet
Hydrastis canadensis Goldenseal
Hydrocotyle americana American Water-pennywort
Hydrophyllum appendiculatum Appendage Waterleaf	Hydrophyllum canadense Blunt-leaf Waterleaf	Hydrophyllum virginianum John's-cabbage
Hypericum ascyron Great St. John's-wort	Hypericum boreale Northern St. John's-wort	Hypericum canadense Canadian St. John's-wort	Hypericum dissimulatum Disguised St. John's-wort	Hypericum ellipticum Pale St. John's-wort	Hypericum gentianoides Orange-grass St. John's-wort
	Hypericum kalmianum Kalm's St. John's-wort	Hypericum majus Larger Canadian St. John's-wort	Hypericum mutilum Slender St. John's-wort	Hypericum prolificum Shrubby St. John's-wort	Hypericum punctatum Common St. John's-wort
	Hypericum sphaerocarpum Roundfruit St. John's-wort
Hypoxis hirsuta Eastern Yellow Star-grass
Impatiens capensis Spotted Jewel-weed	Impatiens pallida Pale Jewel-weed
Ipomoea pandurata Big-root Morning-glory
Iris brevicaulis Lamance Iris	Iris lacustris Dwarf Lake Iris	Iris versicolor Blueflag	Iris virginica Virginia Blueflag	Iris virginica var. shrevei Southern Blueflag	Iris x robusta
Isotria medeoloides Small Whorled Pogonia	Isotria verticillata Large Whorled Pogonia
Jeffersonia diphylla Twinleaf
Justicia americana Common Water-willow
Koenigia islandica Island Koenigia
Krigia biflora Two-flower Dwarf-dandelion	Krigia biflora var. biflora Two-flower Dwarf-dandelion	Krigia virginica Virginia Dwarf-dandelion
Lactuca biennis Tall Blue Lettuce	Lactuca canadensis Canada Lettuce	Lactuca floridana Woodland Lettuce	Lactuca floridana var. floridana Woodland Lettuce	Lactuca floridana var. villosa Woodland Lettuce	Lactuca hirsuta Hairy Lettuce
	Lactuca hirsuta var. hirsuta Hairy Lettuce	Lactuca hirsuta var. sanguinea Hairy Wild Lettuce	Lactuca tatarica Tartarian Lettuce	Lactuca tatarica var. pulchella Blue Lettuce
Laportea canadensis Canada Wood-nettle
Lathyrus japonicus Beach Pea	Lathyrus japonicus var. maritimus Beach Peavine	Lathyrus japonicus var. parviflorus Beach Peavine	Lathyrus japonicus var. pellitus Beach Peavine	Lathyrus ochroleucus Pale Vetchling Peavine	Lathyrus palustris Vetchling Peavine
	Lathyrus venosus Smooth Veiny Peavine
Lechea intermedia Narrowleaf Pinweed	Lechea intermedia var. intermedia Narrowleaf Pinweed	Lechea intermedia var. laurentiana Narrowleaf Pinweed	Lechea maritima Beach Pinweed	Lechea maritima var. maritima Beach Pinweed	Lechea minor Thymeleaf Pinweed
	Lechea mucronata Hairy Pinweed	Lechea pulchella Leggett's Pinweed	Lechea pulchella var. moniliformis Bead Pinweed	Lechea pulchella var. pulchella Leggett's Pinweed	Lechea stricta Upright Pinweed
Lemna minor Lesser Duckweed	Lemna trisulca Star Duckweed	Lemna turionifera Turion Duckweed
Lepidium densiflorum var. densiflorum Dense-flower Pepper-grass	Lepidium virginicum Poor-man's Pepper-grass	Lepidium virginicum var. virginicum Poor-man's Pepper-grass
Leptochloa fusca Bearded Sprangletop
Lespedeza capitata Roundhead Bushclover	Lespedeza hirta Hairy Bushclover	Lespedeza hirta ssp. hirta Hairy Bushclover	Lespedeza intermedia Wand Bushclover	Lespedeza procumbens Trailing Bushclover	Lespedeza violacea Violet Bushclover
	Lespedeza virginica Slender Bushclover	Lespedeza x longifolia	Lespedeza x nuttallii Nuttall's Bushclover (a Hybrid)
Leucophysalis grandiflora Large-flowered Ground-cherry
Leucospora multifida Cliff Conobea
Liatris aspera Tall Gayfeather	Liatris aspera var. intermedia Rough Blazingstar	Liatris cylindracea Slender Blazingstar	Liatris spheroidea Spherical Gayfeather	Liatris spicata Marsh Blazingstar	Liatris spicata var. spicata Marsh Blazingstar
	Liatris x creditonensis	Liatris x gladewitzii
Ligusticum scoticum Scotch Lovage
Ligusticum scoticum ssp. scoticum
Lilium canadense Canada Lily	Lilium canadense ssp. canadense Yellow Canada Lily	Lilium canadense ssp. editorum Red Canada Lily	Lilium michiganense Michigan Lily	Lilium philadelphicum Wood Lily	Lilium philadelphicum var. andinum Wood Lily
	Lilium philadelphicum var. philadelphicum Wood Lily
Limosella aquatica Northern Mudwort
Lindernia dubia var. anagallidea Yellowseed False Pimpernel	Lindernia dubia var. dubia Yellowseed False Pimpernel
Linnaea borealis Twinflower	Linnaea borealis ssp. americana Twinflower
Linum lewisii Prairie Flax	Linum lewisii var. lepagei	Linum lewisii var. lewisii Prairie Flax	Linum medium Stiff Yellow Flax	Linum medium var. medium Wild Flax	Linum medium var. texanum Wild Flax
	Linum striatum Ridged Yellow Flax	Linum sulcatum Grooved Yellow Flax	Linum sulcatum var. sulcatum Glade Flax	Linum virginianum Virginia Flax
Liparis liliifolia Large Twayblade
Liparis loeselii Loesel's Twayblade
Listera auriculata Auricled Twayblade	Listera australis Southern Twayblade	Listera borealis Northern Twayblade	Listera convallarioides Broad-leaved Twayblade	Listera cordata Heartleaf Twayblade	Listera cordata var. cordata Heartleaf Twayblade
	Listera x veltmanii
Lithospermum canescens Hoary Puccoon	Lithospermum caroliniense Golden Puccoon	Lithospermum incisum Narrow-leaved Puccoon	Lithospermum latifolium American Gromwell
Lobelia cardinalis Cardinal-flower	Lobelia dortmanna Water Lobelia	Lobelia inflata Indian-tobacco	Lobelia kalmii Kalm's Lobelia	Lobelia siphilitica Great Blue Lobelia	Lobelia siphilitica var. siphilitica Great Blue Lobelia
	Lobelia spicata Pale-spike Lobelia	Lobelia spicata var. campanulata Pale-spike Lobelia	Lobelia spicata var. hirtella Spiked Lobelia	Lobelia spicata var. spicata Pale-spike Lobelia	Lobelia x speciosa
	Lobelia x speciosa var. schneckii	Lobelia x speciosa var. speciosa
Lomatogonium rotatum Marsh Felwort
Ludwigia alternifolia Bushy Seedbox	Ludwigia palustris Marsh Seedbox	Ludwigia polycarpa Many-fruit False-loosestrife
Lupinus perennis Sundial Lupine	Lupinus perennis ssp. perennis Sundial Lupine	Lupinus perennis var. occidentalis Sundial Lupine	Lupinus perennis var. perennis	Lupinus polyphyllus ssp. polyphyllus	Lupinus polyphyllus var. polyphyllus Large-leaf Lupine
Lycopus americanus American Bugleweed	Lycopus asper Rough Bugleweed	Lycopus rubellus Taperleaf Bugleweed	Lycopus uniflorus Northern Bugleweed	Lycopus uniflorus var. uniflorus	Lycopus virginicus Virginia Bugleweed
	Lycopus x sherardii
Lysimachia ciliata Fringed Loosestrife	Lysimachia hybrida Lance-leaf Loosestrife	Lysimachia lanceolata Lanceleaf Loosestrife	Lysimachia quadriflora Four-flower Loosestrife	Lysimachia quadrifolia Whorled Loosestrife	2.141713 Lysimachia terrestris Swamp Loosestrife
	Lysimachia thyrsiflora Water Loosestrife	Lysimachia x commixta Loosestrife	Lysimachia x producta
Lythrum alatum Winged-loosestrife	Lythrum alatum var. alatum Winged-loosestrife
Maianthemum canadense Wild Lily-of-the-Valley	Maianthemum racemosum Solomon's Plume	Maianthemum racemosum ssp. racemosum Solomon's-plume	Maianthemum stellatum Starflower Solomon's-plume	Maianthemum trifolium Three-leaf Solomon's-plume
Malaxis brachypoda White Adder's-mouth	Malaxis paludosa Bog Adder's-mouth	Malaxis unifolia Green Adder's-mouth
Medeola virginiana Indian Cucumber-root
Megalodonta beckii Beck's Water-marigold	Megalodonta beckii var. beckii Beck Water-marigold
Melampyrum lineare American Cow-wheat	Melampyrum lineare var. latifolium Cow-wheat	Melampyrum lineare var. lineare American Cow-wheat
Menispermum canadense Canada Moonseed
Mentha arvensis Corn Mint	Mentha canadensis Canadian Mint
Menyanthes trifoliata Bog Buckbean
Mertensia maritima Sea Bluebells	Mertensia maritima var. maritima Sea Bluebells	Mertensia paniculata Tall Bluebells	Mertensia paniculata var. paniculata Tall Bluebells	Mertensia virginica Virginia Bluebells
Mikania scandens Climbing Hempweed
Mimulus alatus Sharp-wing Monkeyflower	Mimulus glabratus Roundleaf Monkeyflower	Mimulus glabratus var. jamesii Roundleaf Monkeyflower	Mimulus moschatus Muskflower	Mimulus moschatus var. moschatus Muskflower	Mimulus ringens Square-stem Monkeyflower
	Mimulus ringens var. ringens Monkey Flower
Minuartia dawsonensis Rock Stitchwort	Minuartia groenlandica Mountain Sandwort	Minuartia michauxii Michaux's Stitchwort	Minuartia michauxii var. michauxii Michauxs Stitchwort	Minuartia rubella Boreal Stitchwort	Minuartia stricta Rock Sandwort
Mirabilis nyctaginea Wild Four-o'clock
Mitchella repens Partridge-berry
Mitella diphylla Twoleaf Bishop's-cap	Mitella nuda Naked Bishop's-cap
Moehringia lateriflora Grove Sandwort	Moehringia macrophylla Largeleaf Sandwort
Monarda didyma Oswego-tea	Monarda fistulosa Wild Bergamot Beebalm	Monarda fistulosa ssp. fistulosa Wild Bergamot Beebalm	Monarda fistulosa var. fistulosa Wild Bergamot Beebalm	Monarda fistulosa var. longepetiolata Wild Bergamot Beebalm	Monarda fistulosa var. maheuxii Wild Bergamot Beebalm
	Monarda fistulosa var. menthifolia Oswego-tea	Monarda fistulosa var. mollis Wild Bergamot	Monarda media Purple Bergamot	Monarda punctata Spotted Beebalm	Monarda punctata ssp. punctata Spotted Beebalm
	Monarda punctata var. villicaulis Horsemint
Moneses uniflora One-flower Wintergreen
Monotropa hypopithys American Pinesap	Monotropa uniflora Indian-pipe
Montia fontana Fountain Miner's-lettuce	Montia fontana ssp. fontana Fountain Miner's-lettuce
Myosotis laxa Small Forget-me-not	Myosotis macrosperma Large-seed Forget-me-not	Myosotis verna Spring Forget-me-not
Myosurus minimus Eastern Mousetail
Myriophyllum alterniflorum Alternate-flowered Water Milfoil	Myriophyllum farwellii Farwell's Water-milfoil	Myriophyllum heterophyllum Broadleaf Water-milfoil	Myriophyllum sibiricum Common Water-milfoil	Myriophyllum tenellum Slender Water-milfoil	Myriophyllum verticillatum Whorled Water-milfoil
Najas flexilis Slender Naiad	Najas gracillima Thread-like Naiad	Najas guadalupensis Southern Naiad	Najas guadalupensis ssp. guadalupensis Southern Naiad	Najas guadalupensis ssp. olivacea Southern Naiad	Najas marina Holly-leaved Naiad
Nelumbo lutea American Lotus
Nuphar lutea Yellow Pond-lily	Nuphar lutea ssp. advena Broadleaf Pond-lily	Nuphar lutea ssp. pumila Yellow Cow-lily	Nuphar lutea ssp. rubrodisca	Nuphar lutea ssp. variegata Yellow Cow-lily
Nuttallanthus canadensis Old-field Toadflax
Nymphaea leibergii Dwarf Water-lily	Nymphaea odorata American Water-lily	Nymphaea odorata ssp. odorata American Water-lily	Nymphaea odorata ssp. tuberosa American Water-lily
Nymphoides cordata Little Floatingheart
Oclemena acuminata Whorled Aster	Oclemena nemoralis Bog Aster	Oclemena x blakei Blake's Aster
Oenothera biennis Common Evening-primrose	Oenothera clelandii Lesser Four-point Evening-primros	Oenothera fruticosa Narrowleaf Sundrops	Oenothera fruticosa ssp. glauca Shrubby Sundrops	Oenothera oakesiana Oake's Evening-primrose	Oenothera parviflora Northern Evening-primrose
	Oenothera perennis Small Sundrops	Oenothera pilosella Evening Primrose	Oenothera pilosella ssp. pilosella Meadow Evening-primrose	Oenothera villosa Hairy Evening-primrose	Oenothera villosa ssp. strigosa
	Oenothera villosa ssp. villosa Hairy Evening-primrose
Oligoneuron album Prairie Goldenrod	Oligoneuron houghtonii Houghton's Goldenrod	Oligoneuron ohioense Ohio Goldenrod	Oligoneuron riddellii Riddell's Goldenrod	Oligoneuron rigidum Prairie Goldenrod	Oligoneuron rigidum var. rigidum Prairies Bold Goldenrod
	Oligoneuron x krotkovii	Oligoneuron x lutescens Upland Aster
Omalotheca sylvatica Woodland Cudweed
Onosmodium molle Soft-hairy False Gromwell	Onosmodium molle ssp. hispidissimum Hairy False Gromwell	Onosmodium molle ssp. occidentale Western False Gromwell
Oplopanax horridus Devil's-club
Opuntia fragilis Brittle Prickly-pear	Opuntia fragilis var. fragilis Brittle Prickly-pear	Opuntia humifusa Eastern Prickly-pear	Opuntia humifusa var. humifusa Eastern Prickly-pear
Orobanche fasciculata Clustered Broomrape	Orobanche uniflora One-flowered Broomrape
Orthilia secunda One-side Wintergreen
Oxalis dillenii Dillen's Woodsorrel	Oxalis montana White Woodsorrel	Oxalis stricta Upright Yellow Wood Sorrel
Oxypolis rigidior Stiff Cowbane
Oxytropis borealis Boreal Locoweed	Oxytropis borealis var. hudsonica Boreal Locoweed	Oxytropis borealis var. viscida Sticky Crazyweed	Oxytropis campestris Northern Yellow Point-vetch	Oxytropis campestris var. johannensis St. John's Oxytrope	Oxytropis campestris var. minor Northern Yellow Point-vetch
	Oxytropis deflexa Pendant-pod Point-vetch	Oxytropis deflexa var. foliolosa Pendent-pod Crazyweed	Oxytropis deflexa var. sericea Blue Pendant-pod Oxytrope	Oxytropis splendens Showy Point-vetch
Packera aurea Golden Ragwort	Packera glabella Grassleaf Ragwort	Packera indecora Plains Ragwort	Packera obovata Roundleaf Groundsel	Packera pauciflora Few-flower Ragwort	Packera paupercula Balsam Ragwort
	Packera plattensis Prairie Ragwort
Panax quinquefolius American Ginseng	Panax trifolius Dwarf Ginseng
Parietaria pensylvanica Pennsylvania Pellitory	Parietaria pensylvanica var. pensylvanica Pennsylvania Pellitory
Parnassia glauca Carolina Grass-of-Parnassus	Parnassia kotzebuei Kotzebue's Grass-of-Parnassus	Parnassia palustris Marsh Grass-of-Parnassus	Parnassia palustris var. parviflora Small-flower Grass-of-Parnassus	Parnassia palustris var. tenuis Marsh Grass-of-Parnassus
Paronychia canadensis Forked Nailwort	Paronychia fastigiata Cluster-stemmed Nailwort	Paronychia fastigiata var. fastigiata Cluster-stemmed Nailwort
Parthenocissus quinquefolia Virginia Creeper	Parthenocissus vitacea Woodbine
Pedicularis canadensis Early Wood Lousewort	Pedicularis canadensis ssp. canadensis Canadian Lousewort	Pedicularis flammea Red-tip Lousewort	Pedicularis groenlandica Bull Elephant's-head		Pedicularis labradorica Labrador Lousewort
	Pedicularis labradorica var. labradorica Labrador Lousewort	Pedicularis lanceolata Swamp Lousewort	Pedicularis lapponica Northern Lousewort	Pedicularis macrodonta Muskeg Lousewort	Pedicularis parviflora Small-flower Lousewort
	Pedicularis parviflora ssp. parviflora Small-flower Lousewort	Pedicularis sudetica Sudetan Lousewort	Pedicularis sudetica ssp. interioides Sudetan Lousewort
Peltandra virginica Green Arrow-arum
Penstemon digitalis Foxglove Beardtongue	Penstemon gracilis Slender Beardtongue	Penstemon gracilis var. gracilis	Penstemon hirsutus Hairy Beardtongue
Penthorum sedoides Ditch-stonecrop
Petasites frigidus Arctic Butter-bur	Petasites frigidus var. palmatus Sweet Colt's-foot	Petasites sagittatus Arrowleaf Sweet-colt's-foot	Petasites x vitifolius
Phacelia franklinii Franklin's Phacelia		Phacelia purshii Miami-mist
Phlox divaricata Wild Blue Phlox	Phlox divaricata ssp. divaricata Wild Blue Phlox	Phlox pilosa Downy Phlox	Phlox pilosa ssp. pilosa Downy Phlox	Phlox subulata Moss Phlox
Phryma leptostachya American Lopseed
Phyla lanceolata Fog-fruit
Phyllodoce caerulea Blue Mountain-heath
Physalis heterophylla Clammy Ground-cherry	Physalis heterophylla var. heterophylla Clammy Ground-cherry	Physalis longifolia Longleaf Ground-cherry	Physalis longifolia var. subglabrata Longleaf Ground-cherry	Physalis philadelphica Mexican Ground-cherry	Physalis virginiana Virginia Ground-cherry
	Physalis virginiana var. virginiana Virginia Ground-cherry
Physostegia virginiana False Dragon-head	Physostegia virginiana ssp. virginiana Obedient Plant
Phytolacca americana Common Pokeweed	Phytolacca americana var. americana Common Pokeweed
Pilea fontana Springs Clearweed	Pilea pumila Canada Clearweed	Pilea pumila var. pumila Canada Clearweed
Pinguicula villosa Hairy Butterwort	Pinguicula vulgaris Common Butterwort
Piperia unalascensis Alaska Rein Orchid
Plantago cordata Heartleaf Plantain	Plantago maritima Seaside Plantain	Plantago maritima var. juncoides Seaside Plantain	Plantago rugelii Black-seed Plantain	Plantago rugelii var. rugelii Black-seed Plantain
Platanthera blephariglottis White-fringe Orchis	Platanthera blephariglottis var. blephariglottis White-fringe Orchis	Platanthera ciliaris Yellow-fringe Orchid	Platanthera clavellata Small Green Woodland Orchid	Platanthera dilatata Leafy White Orchis	Platanthera dilatata var. dilatata Leafy White Orchis
	Platanthera flava Southern Rein Orchid	Platanthera flava var. herbiola Pale Green Orchid	Platanthera grandiflora Large Purple-fringe Orchis	Platanthera hookeri Hookers Orchis	Platanthera hyperborea Leafy Northern Green Orchid
	Platanthera hyperborea var. huronensis Green Orchid	Platanthera hyperborea var. hyperborea Leafy Northern Green Orchid	Platanthera lacera Green-fringe Orchis	Platanthera leucophaea Eastern Prairie White-fringed Orchid	Platanthera obtusata Small Northern Bog Orchid
	Platanthera orbiculata Large Roundleaf Orchid	Platanthera orbiculata var. macrophylla Large Roundleaf Orchid	Platanthera orbiculata var. orbiculata Large Roundleaf Orchid	Platanthera psycodes Small Purple-fringe Orchis	Platanthera x andrewsii
	Platanthera x hollandiae	Platanthera x media	Platanthera x reznicekii
Pluchea odorata var. succulenta Saltmarsh Fleabane
Podophyllum peltatum Mayapple
Podostemum ceratophyllum Threadfoot
Pogonia ophioglossoides Rose Pogonia
Polanisia dodecandra Common Clammyweed	Polanisia dodecandra ssp. dodecandra Common Clammyweed
Polemonium reptans var. reptans Jacob's-ladder
Polygala cruciata Crossleaf Milkwort	Polygala cruciata var. aquilonia Cross Polygala	Polygala incarnata Pink Milkwort	Polygala paucifolia Gay-wing Milkwort	Polygala polygama Racemed Milkwort	Polygala polygama var. obtusata Purple Milwort
	Polygala polygama var. polygama Racemed Milkwort	Polygala sanguinea Field Milkwort	Polygala senega Seneca Snakeroot	Polygala senega var. senega Seneca Snakeroot	Polygala verticillata Whorled Milkwort
	Polygala verticillata var. verticillata Whorled Milkwort
Polygonatum biflorum Common Solomon's-seal	Polygonatum biflorum var. commutatum Giant Solomon's-seal	Polygonatum biflorum var. melleum Honey-flowered Solomon's-seal	Polygonatum pubescens Downy Solomon's-seal	Polygonella articulata Eastern Jointweed
Polygonum achoreum Leathery Knotweed	Polygonum amphibium Water Smartweed	Polygonum amphibium var. emersum Water Smartweed	Polygonum amphibium var. stipulaceum Water Smartweed	Polygonum arifolium Halberd-leaf Tearthumb	Polygonum bellardii Narrow-leaf Knotweed
	Polygonum buxiforme Small's Knotweed	Polygonum careyi Carey's Smartweed	Polygonum caurianum Alaska Knotweed	Polygonum cilinode Fringed Black-bindweed	Polygonum douglasii Douglas' Knotweed
	Polygonum douglasii ssp. douglasii	Polygonum erectum Erect Knotweed	Polygonum fowleri Fowler's Knotweed	Polygonum franktonii Nova Scotia Knotweed	Polygonum hudsonianum Hudson Bay Knotweed
	Polygonum hydropiperoides Mild Water-pepper	Polygonum lapathifolium Dock-leaf Smartweed	Polygonum pensylvanicum Pennsylvania Smartweed	Polygonum punctatum Dotted Smartweed	Polygonum punctatum var. confertiflorum Dotted Smartweed
	Polygonum ramosissimum var. prolificum Bushy Knotweed	Polygonum ramosissimum var. ramosissimum Bushy Knotweed	Polygonum robustius Stout Smartweed	Polygonum sagittatum Arrowleaf Tearthumb	Polygonum scandens Climbing False Buckwheat
	Polygonum scandens var. scandens Climbing False Buckwheat	Polygonum tenue Slender Knotweed	Polygonum virginianum Virginia Knotweed	Polygonum viviparum Viviparous Knotweed
Polymnia canadensis White-flower Leafcup
Pontederia cordata Pickerelweed
Porteranthus trifoliatus Bowman's-root
Portulaca oleracea ssp. granulatostellulata Common Purslane	Portulaca oleracea ssp. nitida Common Purslane	Portulaca oleracea ssp. stellata Common Purslane
Potamogeton alpinus Northern Pondweed	Potamogeton amplifolius Largeleaf Pondweed	Potamogeton bicupulatus Snail-seed Pondweed	Potamogeton confervoides Algae-like Pondweed	Potamogeton epihydrus Nuttall's Pondweed	Potamogeton filiformis Slender Pondweed
	Potamogeton filiformis var. alpinus Northern Slender Pondweed	Potamogeton filiformis var. occidentalis Slender Pondweed	Potamogeton foliosus Leafy Pondweed	Potamogeton foliosus ssp. foliosus Leafy Pondweed	Potamogeton friesii Fries' Pondweed
	Potamogeton gramineus Grassy Pondweed	Potamogeton hillii Hill's Pondweed	Potamogeton illinoensis Illinois Pondweed	Potamogeton natans Floating Pondweed	Potamogeton nodosus Longleaf Pondweed
	Potamogeton oakesianus Oake's Pondweed	Potamogeton obtusifolius Blunt-leaf Pondweed	Potamogeton ogdenii Ogden's Pondweed	Potamogeton pectinatus Sago Pondweed	Potamogeton perfoliatus Clasping-leaf Pondweed
	Potamogeton praelongus White-stem Pondweed	Potamogeton pulcher Spotted Pondweed	Potamogeton pusillus Slender Pondweed	Potamogeton pusillus ssp. pusillus Slender Pondweed	Potamogeton pusillus ssp. tenuissimus Slender Pondweed
	Potamogeton richardsonii Redheadgrass	Potamogeton robbinsii Flatleaf Pondweed	Potamogeton spirillus Spiral Pondweed	Potamogeton strictifolius Straightleaf Pondweed	Potamogeton subsibiricus Yenisei River Pondweed
	Potamogeton vaginatus Sheathed Pondweed	Potamogeton vaseyi Vasey's Pondweed	Potamogeton x hagstroemii	Potamogeton x haynesii	Potamogeton x nericus
	Potamogeton x nitens	Potamogeton x scoliophyllus	Potamogeton x spathuliformis	Potamogeton zosteriformis Flatstem Pondweed
Potentilla arguta Tall Cinquefoil	Potentilla arguta ssp. arguta Tall Cinquefoil	Potentilla canadensis Canada Cinquefoil	Potentilla canadensis var. canadensis Canada Cinquefoil	Potentilla canadensis var. villosissima Canada Cinquefoil	Potentilla gracilis Fanleaf Cinquefoil
	Potentilla gracilis var. gracilis Fanleaf Cinquefoil	Potentilla hippiana Horse Cinquefoil	Potentilla hippiana var. hippiana	Potentilla multifida Divided Cinquefoil	Potentilla neumanniana Spring Cinquefoil
	Potentilla nivea Snow Cinquefoil	Potentilla nivea var. nivea Snow Cinquefoil	Potentilla norvegica Norwegian Cinquefoil	Potentilla norvegica ssp. hirsuta Norwegian Cinquefoil	Potentilla norvegica ssp. monspeliensis Norwegian Cinquefoil
	Potentilla norvegica ssp. norvegica	Potentilla paradoxa Bushy Cinquefoil	Potentilla pensylvanica Pennsylvania Cinquefoil	Potentilla pensylvanica var. litoralis	Potentilla pensylvanica var. pensylvanica
	Potentilla pulchella Pretty Cinquefoil	Potentilla pulchella var. pulchella Pretty Cinquefoil	Potentilla pulcherrima Soft Cinquefoil	Potentilla rivalis Brook Cinquefoil	Potentilla rivalis var. millegrana
	Potentilla rivalis var. rivalis Brook Cinquefoil	Potentilla simplex Old-field Cinquefoil	Potentilla tabernaemontani Spotted Cinquefoil
Prenanthes alba White Rattlesnake-root	Prenanthes altissima Tall Rattlesnake-root	Prenanthes racemosa Glaucous Rattlesnake-root	Prenanthes racemosa ssp. multiflora Glaucous Rattlesnake-root	Prenanthes racemosa ssp. racemosa Glaucous Rattlesnake-root	Prenanthes racemosa var. pinnatifida Glaucous Rattlesnake-root
	Prenanthes racemosa var. racemosa Glaucous Rattlesnake-root
Primula egaliksensis Greenland Primrose		Primula incana Jones Primrose	Primula mistassinica Bird's-eye Primrose	Primula stricta Stiff Primrose
Prosartes lanuginosa Yellow Mandarin	Prosartes trachycarpa Rough-fruited Mandarin
Proserpinaca palustris Marsh Mermaidweed	Proserpinaca palustris var. amblyogona Marsh Mermaidweed	Proserpinaca palustris var. crebra Marsh Mermaidweed	Proserpinaca palustris var. palustris Marsh Mermaidweed
Prunella vulgaris Self-heal	Prunella vulgaris ssp. lanceolata Self-heal
Pterospora andromedea Giant Pinedrops
Pulsatilla patens American Pasqueflower	Pulsatilla patens ssp. multifida American Pasqueflower
Pycnanthemum incanum Hoary Mountainmint	Pycnanthemum incanum var. incanum Hoary Mountainmint	Pycnanthemum tenuifolium Slender Mountainmint	Pycnanthemum verticillatum Whorled Mountainmint	Pycnanthemum verticillatum var. pilosum Whorled Mountainmint	Pycnanthemum verticillatum var. verticillatum Whorled Mountain-mint
	Pycnanthemum virginianum Virginia Mountainmint
Pyrola americana American Wintergreen	Pyrola asarifolia Pink Wintergreen	Pyrola asarifolia ssp. asarifolia California Wintergreen	Pyrola chlorantha Green-flower Wintergreen	Pyrola elliptica Shinleaf	Pyrola grandiflora Arctic Wintergreen
	Pyrola minor Lesser Wintergreen
Ranunculus abortivus Kidneyleaf Buttercup	Ranunculus ambigens Water-plantain Spearwort	Ranunculus cymbalaria Seaside Crowfoot	Ranunculus cymbalaria var. cymbalaria Seaside Crowfoot	Ranunculus fascicularis Early Buttercup	Ranunculus flabellaris Yellow Water-crowfoot
	Ranunculus flammula Lesser Spearwort	Ranunculus flammula var. filiformis Greater Creeping Spearwort	Ranunculus flammula var. flammula Lesser Spearwort	Ranunculus gmelinii Small Yellow Water-crowfoot	Ranunculus gmelinii var. purshii Small Yellow Water-crowfoot
	Ranunculus hispidus Hispid Buttercup	Ranunculus hispidus var. caricetorum Bristly Buttercup	Ranunculus hispidus var. hispidus Bristly Buttercup	Ranunculus hispidus var. nitidus Hispid Buttercup	Ranunculus hyperboreus Arctic Buttercup
	Ranunculus hyperboreus var. hyperboreus Arctic Buttercup	Ranunculus lapponicus Lapland Buttercup	Ranunculus longirostris Eastern White Water Crowfoot	Ranunculus macounii Macoun's Buttercup	Ranunculus pallasii Pallas Buttercup
	Ranunculus pedatifidus Northern Buttercup	Ranunculus pedatifidus var. affinis Northern Buttercup	Ranunculus pensylvanicus Bristly Crowfoot	Ranunculus recurvatus Hooked Crowfoot	Ranunculus rhomboideus Prairie Buttercup
	Ranunculus sceleratus Cursed Crowfoot	Ranunculus sceleratus var. multifidus Cursed Crowfoot	Ranunculus sceleratus var. sceleratus Cursed Crowfoot	Ranunculus trichophyllus Northeastern White Water Crowfoot	Ranunculus trichophyllus var. eradicatus Northeastern White Water Crowfoot
	Ranunculus trichophyllus var. trichophyllus Threadleaf Water Crowfoot
Ratibida pinnata Gray-head Prairie Coneflower
Rhexia virginica Virginia Meadowbeauty
Rhinanthus minor Little Yellow-rattle	Rhinanthus minor ssp. groenlandicus Little Yellow-rattle
Rorippa palustris Bog Yellowcress	Rorippa palustris ssp. fernaldiana Marsh Yellowcress	Rorippa palustris ssp. hispida Bog Yellowcress	Rorippa palustris ssp. palustris Bog Yellowcress
Rotala ramosior Toothcup
Rudbeckia fulgida Orange Coneflower	Rudbeckia fulgida var. speciosa Orange Coneflower	Rudbeckia hirta Black-eyed-Susan	Rudbeckia hirta var. hirta Black-eyed-Susan	Rudbeckia hirta var. pulcherrima Black-eyed-Susan	Rudbeckia laciniata Cut-leaved Coneflower
	Rudbeckia laciniata var. laciniata Green-head Coneflower
Rumex altissimus Tall Dock	Rumex aquaticus Western Dock	Rumex aquaticus var. fenestratus Western Dock	Rumex conglomeratus Clustered Green Dock	Rumex maritimus Sea-side Dock	Rumex orbiculatus Water Dock
	Rumex orbiculatus var. borealis Water Dock	Rumex orbiculatus var. orbiculatus Water Dock	Rumex salicifolius Willow Dock	Rumex salicifolius var. mexicanus Willow Dock	Rumex verticillatus Swamp Dock
Sabatia angularis Square-stemmed Rose Pink
Sagina decumbens Small-flowered Pearlwort	Sagina decumbens ssp. decumbens Small-flowered Pearlwort	Sagina maxima Sticky-stem Pearlwort	Sagina maxima ssp. maxima Sticky-stem Pearlwort	Sagina nodosa Knotted Pearlwort	Sagina nodosa ssp. borealis Knotted Pearlwort
Sagittaria cristata Crested Arrow-head	Sagittaria cuneata Wapatum Arrowhead	Sagittaria graminea Grassleaf Arrowhead	Sagittaria graminea var. graminea Grassleaf Arrowhead	Sagittaria latifolia Broadleaf Arrowhead	Sagittaria latifolia var. latifolia Broadleaf Arrowhead
	Sagittaria latifolia var. pubescens Hairy Arrowhead	Sagittaria rigida Sessile-fruit Arrowhead
Salicornia maritima Jointed Glasswort
Samolus valerandi Valerand's Brookweed
Samolus valerandi ssp. parviflorus Water Pimpernel
Sanguinaria canadensis Bloodroot
Sanicula canadensis Short-styled Sanicle	Sanicula canadensis var. canadensis Canadian Black Snakeroot	Sanicula canadensis var. grandis Canadian Black Snakeroot	Sanicula marilandica Maryland Black Snakeroot	Sanicula odorata Clustered Black Snakeroo	Sanicula trifoliata Large-fruited Sanicle
Sarracenia purpurea Northern Pitcherplant	Sarracenia purpurea ssp. gibbosa Purple Pitcherplant
Saururus cernuus Lizard's-tail
Saxifraga aizoides Yellow Mountain Saxifrage	Saxifraga cernua Nodding Saxifrage	Saxifraga cespitosa Tufted Saxifrage	Saxifraga cespitosa ssp. cespitosa Tufted Saxifrage	Saxifraga cespitosa ssp. exaratoides Tufted Saxifrage	Saxifraga cespitosa var. cespitosa Tufted Saxifrage
	Saxifraga hirculus Yellow Marsh Saxifrage	Saxifraga hirculus ssp. hirculus Yellow Marsh Saxifrage	Saxifraga hirculus ssp. propinqua Yellow Marsh Saxifrage	Saxifraga oppositifolia Purple Mountain Saxifrage	Saxifraga oppositifolia ssp. oppositifolia Purple Mountain Saxifrage
	Saxifraga paniculata White Mountain Saxifrage	Saxifraga paniculata ssp. neogaea White Mountain Saxifrage	Saxifraga rivularis Alpine Brook Saxifrage	Saxifraga tricuspidata Prickly Saxifrage	Saxifraga virginiensis Virginia Saxifrage
	Saxifraga virginiensis var. virginiensis Virginia Saxifrage
Scrophularia lanceolata Hare Figwort	Scrophularia marilandica Carpenter's Square Figwort
Scutellaria galericulata Hooded Skullcap	Scutellaria lateriflora Mad-dog Skullcap	Scutellaria lateriflora var. lateriflora Mad-dog Skullcap	Scutellaria nervosa Veined Skullcap	Scutellaria parvula Small Skullcap	Scutellaria parvula var. missouriensis Shale-barren Skullcap
	Scutellaria parvula var. parvula Small Skullcap
Senecio congestus Marsh Ragwort	Senecio eremophilus Desert Groundsel	Senecio eremophilus var. eremophilus Desert Groundsel
Senna hebecarpa Wild Senna
Sibbaldiopsis tridentata Three-toothed Cinquefoil
Sicyos angulatus One-seed Bur-cucumber
Sida hermaphrodita Virginia Mallow
Silene acaulis Moss Campion	Silene antirrhina Sleepy Catchfly	Silene involucrata Arctic Catchfly	Silene involucrata ssp. involucrata Arctic Catchfly	Silene tayloriae Peel River Catchfly	Silene uralensis Apetalous Catchfly
	Silene uralensis ssp. uralensis Apetalous Catchfly	Silene virginica var. virginica Fire-pink	Silene x hampeana
Silphium laciniatum Compass Plant	Silphium laciniatum var. laciniatum Compass Plant	Silphium perfoliatum Cup-plant	Silphium perfoliatum var. perfoliatum	Silphium terebinthinaceum Prairie Rosinweed	Silphium terebinthinaceum var. terebinthinaceum Prairie Rosinweed
Sisyrinchium albidum White Blue-eyed-grass	Sisyrinchium angustifolium Pointed Blue-eyed-grass	Sisyrinchium montanum Strict Blue-eyed-grass	Sisyrinchium montanum var. crebrum Strict Blue-eyed-grass	Sisyrinchium mucronatum Michaux's Blue-eyed-grass
Sium suave Hemlock Water-parsnip
Smilax ecirrata Upright Greenbrier	Smilax herbacea Smooth Herbaceous Greenbrier	Smilax illinoensis Illinois Greenbrier	Smilax lasioneura Herbaceous Greenbrier	Smilax rotundifolia Common Greenbrier	Smilax tamnoides Halberd-leaf Greenbrier
Solanum carolinense var. carolinense Carolina Horse-nettle	Solanum ptychanthum Black Nightshade
Solidago altissima Tall Goldenrod	Solidago arguta Cutleaf Goldenrod	Solidago arguta var. arguta Cutleaf Goldenrod	Solidago bicolor White Goldenrod	Solidago caesia Bluestem Goldenrod	Solidago canadensis Canada Goldenrod
	Solidago canadensis var. canadensis Canadian Goldenrod	Solidago canadensis var. gilvocanescens Canadian Goldenrod	Solidago canadensis var. hargeri Canadian Goldenrod	Solidago canadensis var. salebrosa	Solidago flexicaulis Broad-leaved Goldenrod
	Solidago gigantea Smooth Goldenrod	Solidago hispida Hairy Goldenrod	Solidago hispida var. hispida Hairy Goldenrod	Solidago hispida var. huronensis Hairy Goldenrod	Solidago hispida var. lanata Hairy Goldenrod
	Solidago juncea Early Goldenrod	Solidago macrophylla Largeleaf Goldenrod	Solidago missouriensis Missouri Goldenrod	Solidago missouriensis var. fasciculata Missouri Goldenrod	Solidago multiradiata Alpine Goldenrod
	Solidago multiradiata var. multiradiata Alpine Goldenrod	Solidago nemoralis Field Goldenrod	Solidago nemoralis var. longipetiolata Field Goldenrod	Solidago nemoralis var. nemoralis Gray Goldenrod	Solidago patula Roundleaf Goldenrod
	Solidago patula var. patula Roughleaf Goldenrod	Solidago puberula Downy Goldenrod	Solidago puberula var. puberula Downy Goldenrod	Solidago rugosa Rough-leaf Goldenrod	Solidago rugosa ssp. aspera Rough-leaf Goldenrod
	Solidago rugosa ssp. rugosa	Solidago rugosa var. rugosa	Solidago rugosa var. sphagnophila Rough-leaf Goldenrod	Solidago rugosa var. villosa Rough-leaf Goldenrod	Solidago sempervirens var. sempervirens Seaside Goldenrod
	Solidago simplex Sticky Goldenrod	Solidago simplex ssp. randii Sticky Goldenrod	Solidago simplex ssp. simplex Sticky Goldenrod	Solidago simplex var. gillmanii Dune Goldenrod	Solidago simplex var. nana Sticky Goldenrod
	Solidago simplex var. ontarioensis Sticky Goldenrod	Solidago simplex var. racemosa Lake Ontario Goldenrod	Solidago simplex var. simplex Sticky Goldenrod	Solidago speciosa Showy Goldenrod	Solidago speciosa var. rigidiuscula Showy Goldenrod
	Solidago squarrosa Squarrose Goldenrod	Solidago uliginosa Bog Goldenrod	Solidago uliginosa var. levipes Bog Goldenrod	Solidago uliginosa var. linoides Bog Goldenrod	Solidago uliginosa var. uliginosa Bog Goldenrod
	Solidago ulmifolia Elmleaf Goldenrod	Solidago ulmifolia var. ulmifolia Elmleaf Goldenrod	Solidago x beaudryi	Solidago x luteus
Spergularia canadensis Canada Sandspurry	Spergularia canadensis var. canadensis	Spergularia salina Saltmarsh Sandspurry	Spergularia salina var. salina Saltmarsh Sandspurry
Spiranthes casei Case's Ladies'-tresses	Spiranthes casei var. casei Case's Ladie's-tresses	Spiranthes cernua Nodding Ladies'-tresses	Spiranthes lacera Ladies'-tresses	Spiranthes lacera var. gracilis Southern Slender Ladies'-tresses	Spiranthes lacera var. lacera Southern Slender Ladie's-tresses
	Spiranthes lucida Shining Ladies'-tresses	Spiranthes magnicamporum Great Plains Ladies'-tresses	Spiranthes ochroleuca Yellow Nodding Ladies'-tresses	Spiranthes ovalis Lesser Ladies'-tresses	Spiranthes ovalis var. erostellata Lesser Ladie's-tresses
	Spiranthes romanzoffiana Hooded Ladies'-tresses	Spiranthes x intermedia	Spiranthes x simpsonii
Spirodela polyrrhiza Common Water-flaxseed
Stachys pilosa Hairy Hedge-nettle	Stachys pilosa var. arenicola Marsh Hedge-nettle	Stachys pilosa var. pilosa Hairy Hedge-nettle	Stachys tenuifolia Smooth Hedge-nettle
Stellaria borealis Northern Stitchwort	Stellaria borealis ssp. borealis	Stellaria crassifolia Fleshy Stitchwort	Stellaria crassifolia var. crassifolia Fleshy Stitchwort	Stellaria crassipes Tundra Starwort	Stellaria humifusa Creeping Sandwort
	Stellaria longifolia Longleaf Stitchwort	Stellaria longifolia var. atrata Longleaf Stitchwort	Stellaria longifolia var. eciliata Longleaf Stitchwort	Stellaria longifolia var. longifolia Longleaf Stitchwort	Stellaria longipes Long-stalked Stitchwort
	Stellaria longipes ssp. longipes Long-stalk Starwort
Streptopus amplexifolius Clasping Twisted-stalk	Streptopus amplexifolius var. amplexifolius White Twisted-stalk	Streptopus lanceolatus Rosy Twisted-stalk	Streptopus lanceolatus var. lanceolatus Rosy Twisted-stalk	Streptopus lanceolatus var. longipes Rosy Twisted-stalk	Streptopus lanceolatus var. roseus Rosy Twisted-stalk
	Streptopus x oreopolus Twisted Stalk Hybrid
Strophostyles helvula Trailing Wild Bean
Stylophorum diphyllum Celandine Poppy
Suaeda calceoliformis American Sea-blite	Suaeda maritima Herbaceous Seepweed
Subularia aquatica Water Awlwort	Subularia aquatica var. americana Water Awlwort
Symphyotrichum boreale Boreal Aster	Symphyotrichum ciliatum Alkali American-aster	Symphyotrichum ciliolatum Lindley's Aster	Symphyotrichum cordifolium Heart-leaf Aster	Symphyotrichum dumosum Bushy Aster	Symphyotrichum dumosum var. dumosum Rice Button American-aster
	Symphyotrichum dumosum var. strictior Tradescant Aster	Symphyotrichum ericoides White Heath Aster	Symphyotrichum ericoides var. ericoides White Heath Aster	Symphyotrichum ericoides var. pansum White Heath Aster	Symphyotrichum ericoides var. prostratum White Heath Aster
	Symphyotrichum falcatum var. commutatum White Prairie Aster	Symphyotrichum laeve Smooth Blue Aster	Symphyotrichum laeve var. laeve Smooth Blue Aster	Symphyotrichum lanceolatum Panicled Aster	Symphyotrichum lanceolatum ssp. hesperium Siskiyou Aster
	Symphyotrichum lanceolatum ssp. lanceolatum Panicled Aster	Symphyotrichum lanceolatum var. hesperium	Symphyotrichum lanceolatum var. hirsuticaule Panicled Aster	Symphyotrichum lanceolatum var. interior	Symphyotrichum lanceolatum var. lanceolatum Panicled Aster
	Symphyotrichum lanceolatum var. latifolium Panicled Aster	Symphyotrichum lateriflorum Starved Aster	Symphyotrichum lateriflorum var. angustifolium Starved Aster	Symphyotrichum lateriflorum var. lateriflorum Calico Aster	Symphyotrichum lateriflorum var. tenuipes Starved Aster
	Symphyotrichum novae-angliae New England Aster	Symphyotrichum novi-belgii var. villicaule Longleaf Aster	Symphyotrichum ontarionis Ontario Aster	Symphyotrichum oolentangiense Sky Blue Aster	Symphyotrichum oolentangiense var. oolentangiense Sky Blue Aster
	Symphyotrichum pilosum White Heath Aster	Symphyotrichum pilosum var. pilosum White Heath Aster	Symphyotrichum pilosum var. pringlei White Heath Aster	Symphyotrichum praealtum Willow Aster	Symphyotrichum praealtum var. praealtum Willow Aster
	Symphyotrichum prenanthoides Crooked-stem Aster	Symphyotrichum puniceum Swamp Aster	Symphyotrichum puniceum var. puniceum Swamp Aster	Symphyotrichum robynsianum Robyns' American-aster	Symphyotrichum sericeum Western Silvery Aster
	Symphyotrichum shortii Short's Aster	Symphyotrichum urophyllum White-arrow Aster	Symphyotrichum x amethystinum Hybrid
Symplocarpus foetidus Skunk-cabbage
Taenidia integerrima Yellow Pimpernel
Tanacetum bipinnatum Lake Huron Tansy	Tanacetum bipinnatum ssp. huronense Lake Huron Tansy
Taraxacum eriophorum Wool-bearing Dandelion	Taraxacum officinale ssp. ceratophorum Common Dandelion
Tephrosia virginiana Goat's-rue
Tetraneuris herbacea Lakeside Daisy
Teucrium canadense American Germander	Teucrium canadense var. canadense American Germander	Teucrium canadense var. occidentale American Germander
Thalictrum dasycarpum Purple Meadowrue	Thalictrum dioicum Early Meadowrue	Thalictrum pubescens Tall Meadowrue	Thalictrum revolutum Waxleaf Meadowrue	Thalictrum sparsiflorum Few-flower Meadowrue	Thalictrum sparsiflorum var. richardsonii Few-flower Meadowrue
	Thalictrum thalictroides Windflower	Thalictrum venulosum Veined Meadowrue
Thaspium barbinode Hairy-joint Meadow-parsnip	Thaspium trifoliatum Purple Meadow-parsnip	Thaspium trifoliatum var. aureum Purple Meadow-parsnip
Tiarella cordifolia Heartleaf Foamflow	Tiarella cordifolia var. cordifolia Heartleaf Foamflow
Tofieldia coccinea Northern False-asphodel	Tofieldia pusilla Scotch False-asphodel
Toxicodendron radicans Eastern Poison-ivy	Toxicodendron radicans ssp. negundo Poison-ivy
Tradescantia ohiensis Ohio Spiderwort
Tragopogon x crantzii
Triadenum fraseri Marsh St. John's-wort	Triadenum virginicum Marsh St. John's-wort
Triantha glutinosa Sticky Bog-asphodel	Triantha occidentalis ssp. brevistyla Short-style Sticky Tofieldia
Trichostema brachiatum False Pennyroyal
Trichostema dichotomum Forked Bluecurls
Trientalis borealis Northern Starflower	Trientalis borealis ssp. borealis Northern Starflower
Trifolium reflexum Buffalo Clover
Trillium cernuum Nodding Trillium	Trillium erectum Ill-scent Trillium	Trillium flexipes Nodding Trillium	Trillium grandiflorum Large-flower Trillium	Trillium undulatum Painted Trillium
Triodanis perfoliata Claspingleaf Venus'-looking-glass	Triodanis perfoliata var. perfoliata Claspingleaf Venu's-looking-glass
Triosteum angustifolium Yellowleaf Tinker's-weed	Triosteum aurantiacum Coffee Tinker's-weed	Triosteum aurantiacum var. aurantiacum Coffee Tinker's-wee	Triosteum perfoliatum Perfoliate Tinker's-weed
Triphora trianthophora Nodding Pogonia
Tripleurospermum maritima False Chamomile	Tripleurospermum maritima ssp. phaeocephala False Chamomile
Urtica dioica Stinging Nettle	Urtica dioica ssp. gracilis Stinging Nettle
Utricularia cornuta Horned Bladderwort	Utricularia geminiscapa Hidden-fruited Bladderwort	Utricularia gibba Humped Bladderwort	Utricularia intermedia Flatleaf Bladderwort	Utricularia macrorhiza Greater Bladderwort	Utricularia minor Lesser Bladderwort
	Utricularia ochroleuca Northern Bladderwort	Utricularia purpurea Purple Bladderwort	Utricularia resupinata Northeastern Bladderwort
Uvularia grandiflora Large-flower Bellwort	Uvularia perfoliata Perfoliate Bellwort	Uvularia sessilifolia Sessile-leaf Bellwort
Valeriana dioica Wood Valerian	Valeriana dioica var. sylvatica Wood Valerian	Valeriana edulis Hairy Valerian	Valeriana edulis var. ciliata Hairy Valerian	Valeriana sitchensis Marsh Valerian	Valeriana uliginosa Marsh Valerian
	Valerianella chenopodiifolia Goose-foot Corn-salad	Valerianella umbilicata Navel-shape Corn-salad
Verbena bracteata Large-bract Vervain	Verbena hastata Blue Vervain	Verbena hastata var. hastata Blue Vervain	Verbena simplex Narrowleaf Vervain	Verbena stricta Hoary Vervain	Verbena urticifolia White Vervain
	Verbena urticifolia var. urticifolia White Vervain	Verbena x deamii	Verbena x engelmannii	Verbena x perriana	Verbena x rydbergii
Verbesina alternifolia Wingstem
Vernonia gigantea Giant Ironweed	Vernonia gigantea ssp. gigantea Giant Ironweed	Vernonia missurica Missouri Ironweed
Veronica americana American Speedwell	Veronica officinalis var. officinalis Gypsy-weed	Veronica peregrina Purslane Speedwell	Veronica peregrina ssp. peregrina	Veronica peregrina ssp. xalapensis Neckweed	Veronica scutellata Marsh-speedwell
	Veronica serpyllifolia Thyme-leaved Speedwell	Veronica serpyllifolia ssp. humifusa	Veronica wormskjoldii Alpine Speedwell	Veronica wormskjoldii var. wormskjoldii Alpine Speedwell
Veronicastrum virginicum Culver's-root
Vicia americana American Purple Vetch	Vicia americana ssp. americana American Purple Vetch	Vicia caroliniana Carolina Wood Vetch
Viola adunca Sand Violet	Viola adunca var. adunca Sand Violet	Viola affinis Le Conte's Violet	Viola bicolor Field Pansy	Viola blanda Smooth White Violet	Viola blanda var. palustriformis Large-leaf White Violet
	Viola canadensis Canada Violet	Viola canadensis var. canadensis Canada Violet	Viola canadensis var. rugulosa Canada Violet	Viola conspersa American Bog Violet	Viola cucullata Marsh Blue Violet
	Viola epipsila Northern Marsh Violet	Viola epipsila ssp. repens Northern Marsh Violet	Viola labradorica Labrador Violet	Viola lanceolata Lanceleaf Violet	Viola lanceolata ssp. lanceolata Lanceleaf Violet
	Viola macloskeyi Smooth White Violet	Viola macloskeyi ssp. pallens Smooth White Violet	Viola missouriensis Missouri Violet	Viola nephrophylla Northern Bog Violet	Viola nephrophylla var. nephrophylla Northern Bog Violet
	Viola novae-angliae New England Violet	Viola palustris var. palustris Alpine Marsh Violet	Viola pedata Bird's-foot Violet	Viola pedatifida Prairie Violet	Viola primulifolia Primrose-leaf Violet
	Viola pubescens Downy Yellow Violet	Viola pubescens var. leiocarpon Yellow Violet	Viola pubescens var. peckii Yellow Violet	Viola pubescens var. pubescens Yellow Violet	Viola renifolia Kidneyleaf White Violet
	Viola rostrata Long-spur Violet	Viola rotundifolia Roundleaf Violet	Viola sagittata Arrowleaf Violet	Viola sagittata var. ovata Arrowleaf Violet	Viola sagittata var. sagittata Arrowleaf Violet
	Viola selkirkii Great-spurred Violet	Viola septentrionalis var. septentrionalis Northern Blue Violet	Viola sororia Woolly Blue Violet	Viola striata Striped Violet	Viola triloba Three-lobed Violet
	Viola triloba var. dilatata Cleft Violet	Viola triloba var. triloba Three-lobed Violet	Viola x bissellii	Viola x brauniae Hybrid: Viola Rostrata X Striata	Viola x eclipes
	Viola x filicetorum	Viola x malteana	Viola x melissifolia	Viola x palmata Early Blue Violet	Viola x populifolia
	Viola x porteriana Stone's Violet	Viola x sublanceolata
Waldsteinia fragarioides Barren Strawberry	Waldsteinia fragarioides ssp. fragarioides Barren Strawberry
Wolffia arrhiza Spotless Water-flaxseed	Wolffia borealis Dotted Watermeal	Wolffia brasiliensis Pointed Watermeal	Wolffia columbiana Columbian Watermeal
Xanthium strumarium Rough Cocklebur	Xanthium strumarium var. canadense Cocklebur	Xanthium strumarium var. glabratum Rough Cocklebur
Xyris difformis Carolina Yellow-eyed-grass		Xyris difformis var. difformis Bog Yellow-eyed-grass	Xyris montana Northern Yellow-eyed-grass
Yucca filamentosa Common Yucca
Zannichellia palustris Horned Pondweed
Zigadenus elegans White Camas		Zigadenus elegans ssp. glaucus White Camas
Zizia aptera Golden Alexanders	Zizia aurea Common Alexanders
Zostera marina Sea-wrack