Authors: Na.J. Pilla
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Families: 146
Genera: 617
Species: 1497 (species rank)
Total Taxa: 1656 (including subsp. and var.)

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Ruellia humilis - fringeleaf wild petunia
Acorus calamus - sweetflag
Viburnum acerifolium - mapleleaf viburnum
Viburnum dentatum var. lucidum - northern arrow-wood
Viburnum lentago - nannyberry
Viburnum opulus - European cranberrybush
Viburnum opulus var. americanum - American cranberrybush
Viburnum recognitum - northern arrow-wood
Alisma subcordatum - American water plantain
Alisma triviale - northern water plantain
Sagittaria brevirostra - short-beak arrowhead
Sagittaria graminea - grassy arrowhead
Sagittaria latifolia - broadleaf arrowhead
Sagittaria rigida - sessile-fruited arrowhead
Amaranthus albus - prostrate pigweed
Amaranthus blitoides - mat amaranth
Amaranthus hybridus - slim amaranth
Amaranthus powellii - Powell's amaranth
Amaranthus retroflexus - redroot amaranth
Amaranthus tuberculatus - rough-fruited water-hemp
Atriplex patula - spear orach
Chenopodium album - lambsquarters
Chenopodium pratericola - desert goosefoot
Chenopodium simplex - maple-leaf goosefoot
Chenopodium standleyanum - Standley's goosefoot
Dysphania botrys - Jerusalem oak
Froelichia gracilis - slender snakecotton
Kochia scoparia - mock cypress
Suaeda calceoliformis - Pursh seepweed
Allium canadense - meadow onion
Allium cernuum - nodding onion
Allium tricoccum var. burdickii - narrowleaf wild leek
Allium vineale - wild garlic
Leucojum aestivum - summer snowflake
Narcissus poeticus - poet's narcissus
Cotinus coggygria - Smoke Tree
Rhus aromatica - fragrant sumac
Rhus glabra - smooth sumac
Rhus typhina - staghorn sumac
Toxicodendron rydbergii - western poison ivy
Toxicodendron vernix - poison sumac
Angelica atropurpurea - purplestem angelica
Anthriscus caucalis - burr chervil
Chaerophyllum procumbens - spreading chervil
Cicuta bulbifera - bulblet-bearing water hemlock
Cicuta maculata - spotted water hemlock
Cryptotaenia canadensis - Canadian honewort
Daucus carota - Queen Anne's lace
Erigenia bulbosa - harbinger of spring
Eryngium yuccifolium - rattlesnake master
Osmorhiza claytonii - Clayton's sweetroot
Osmorhiza longistylis - longstyle sweetroot
Oxypolis rigidior - stiff cowbane
Pastinaca sativa - wild parsnip
Polytaenia nuttallii - Nuttall's prairie parsley
Sanicula canadensis - Canadian blacksnakeroot
Sanicula marilandica - Maryland black-snakeroot
Sanicula odorata - clustered blacksnakeroot
Sanicula trifoliata - largefruit blacksnakeroot
Sium suave - hemlock waterparsnip
Taenidia integerrima - yellow pimpernell
Thaspium barbinode - hairyjoint meadowparsnip
Thaspium trifoliatum - purple meadowparsnip
Torilis japonica - erect hedgeparsley
Zizia aurea - golden zizia
Apocynum androsaemifolium - spreading dogbane
Asclepias amplexicaulis - clasping milkweed
Asclepias exaltata - poke milkweed
Asclepias hirtella - tall-green milkweed
Asclepias incarnata - Marsh milkweed
Asclepias purpurascens - purple milkweed
Asclepias sullivantii - Sullivant's milkweed
Asclepias syriaca - common milkweed
Asclepias tuberosa - butterfly milkweed
Asclepias verticillata - whorled milkweed
Asclepias viridiflora - green comet milkweed
Vinca minor - common periwinkle
Vincetoxicum nigrum - black swallow-wort
Ilex mucronata - catberry
Ilex opaca - American holly
Ilex verticillata - Winterberry Holly
Arisaema dracontium - green-dragon
Arisaema triphyllum - Jack-in-the-pulpit
Calla palustris - water arum
Lemna minor - common duckweed
Lemna minuta - least duckweed
Lemna trisulca - star duckweed
Lemna turionifera - turion duckweed
Spirodela polyrrhiza - common duckmeat
Symplocarpus foetidus - skunk cabbage
Wolffia columbiana - Columbian watermeal
Aralia hispida - bristly sarsaparilla
Aralia nudicaulis - wild sarsaparilla
Aralia racemosa - American spikenard
Hedera helix - English ivy
Hydrocotyle umbellata - manyflower marshpennywort
Panax quinquefolius - American ginseng
Panax trifolius - dwarf ginseng
Aristolochia serpentaria - Virginia snakeroot
Asarum canadense - Canadian wild ginger
Asparagus officinalis - garden asparagus
Camassia scilloides - Atlantic camas
Convallaria majalis - European lily of the valley
Hyacinthoides non-scripta - English bluebell
Maianthemum canadense - Canada mayflower
Maianthemum racemosum - feathery false lily of the vally
Maianthemum stellatum - starry false lily of the vally
Muscari neglectum - starch grape hyacinth
Ornithogalum umbellatum - star-of-Bethlehem
Polygonatum biflorum - McKittrick's Solomon's seal
Polygonatum pubescens - hairy Solomon's seal
Scilla siberica - Siberian squill
Yucca flaccida - weak-leaf yucca
Asplenium platyneuron - ebony spleenwort
Achillea millefolium - western yarrow
Achillea ptarmica - sneezeweed
Ambrosia artemisiifolia - annual ragweed
Ambrosia psilostachya - Cuman ragweed
Ambrosia trifida - great ragweed
Antennaria neglecta - field pussytoes
Antennaria plantaginifolia - plantainleaf pussytoes
Anthemis cotula - stinking chamomile
Arctium lappa - greater burrdock
Arctium minus - lesser burdock
Arnoglossum atriplicifolium - pale Indian plaintain
Arnoglossum plantagineum - groovestem Indian plantain
Artemisia absinthium - common sagewort
Artemisia biennis - biennial wormwood
Bidens aristosa - bearded beggarticks
Bidens bipinnata - Spanish needles
Bidens cernua - nodding beggartick
Bidens connata - purplestem beggarticks
Bidens discoidea - small beggarticks
Bidens frondosa - devil's beggartick
Bidens polylepis - bearded beggarticks
Bidens trichosperma - crowned beggarticks
Bidens tripartita - threelobe beggarticks
Bidens vulgata - big devil
Carduus nutans - nodding plumeless thistle
Cirsium altissimum - tall thistle
Cirsium arvense - Canada thistle
Cirsium discolor - field thistle
Cirsium muticum - swamp thistle
Cirsium pitcheri - Pitcher's thistle
Cirsium vulgare - bull thistle
Conoclinium coelestinum - blue mistflower
Conyza canadensis - Canadian horseweed
Conyza ramosissima - dwarf horseweed
Coreopsis lanceolata - lanceleaf tickseed
Coreopsis palmata - stiff tickseed
Coreopsis tripteris - tall tickseed
Crepis capillaris - smooth hawk's-beard
Crepis tectorum - narrow-leaf hawk's-beard
Doellingeria umbellata - tall flat-topped white aster
Erechtites hieraciifolius - American burnweed
Erigeron annuus - annual fleabane
Erigeron philadelphicus - Philadelphia fleabane
Erigeron pulchellus - poor robin fleabane
Erigeron strigosus - prairie fleabane
Eupatorium altissimum - tall thoroughwort
Eupatorium perfoliatum - common boneset
Eupatorium serotinum - lateflowering thoroughwort
Eurybia furcata - forked aster
Eurybia macrophylla - bigleaf aster
Euthamia graminifolia - common goldentop
Euthamia gymnospermoides - Great Plains goldentop
Eutrochium fistulosum - hollow Joe-pye-weed
Eutrochium maculatum - spotted Joe-Pye-weed
Eutrochium purpureum - sweetscented Joe-Pye-weed
Galinsoga quadriradiata - shaggy soldier
Helenium autumnale - common sneezeweed
Helenium flexuosum - purplehead sneezeweed
Helianthus annuus - common sunflower
Helianthus decapetalus - thinleaf sunflower
Helianthus divaricatus - woodland sunflower
Helianthus giganteus - tall sunflower
Helianthus grosseserratus - sawtooth sunflower
Helianthus hirsutus - hairy sunflower
Helianthus mollis - ashy sunflower
Helianthus occidentalis - western sunflower
Helianthus petiolaris - prairie sunflower
Helianthus strumosus - rough sunflower
Helianthus tuberosus - Jerusalem artichoke
Hieracium aurantiacum - orange hawkweed
Hieracium caespitosum - Gronovis hawkweed
Hieracium gronovii - yellow hawkeye
Hieracium longipilum - longbeard hawkweed
Hieracium scabrum - rough hawkweed
Hieracium umbellatum - narrowleaf hawkweed
Hypochaeris radicata - hairy cat's ear
Inula helenium - elecampane inula
Ionactis linariifolia - flaxleaf whitetop aster
Krigia biflora - twoflower dwarfdandelion
Krigia virginica - Virginia dwarfdandelion
Lactuca biennis - tall blue lettuce
Lactuca canadensis - Canada lettuce
Lactuca floridana - woodland lettuce
Lactuca hirsuta - hairy lettuce
Lactuca serriola - prickly lettuce
Liatris aspera - tall blazing star
Liatris cylindracea - Ontario blazing star
Liatris scariosa var. nieuwlandii - Nieuwland's blazing star
Liatris spicata - dense blazing star
Madia sativa - Chile tarweed
Matricaria discoidea - disc mayweed
Packera aurea - golden ragwort
Packera glabella - butterweed
Packera paupercula - balsam groundsel
Packera plattensis - prairie groundsel
Prenanthes alba - white rattlesnakeroot
Prenanthes altissima - tall rattlesnakeroot
Prenanthes aspera - rough rattlesnakeroot
Prenanthes crepidinea - nodding rattlesnakeroot
Prenanthes racemosa - purple rattlesnakeroot
Pseudognaphalium obtusifolium - Eastern rabbit-tobacco
Ratibida pinnata - pinnate prairie coneflower
Rudbeckia hirta - black-eyed Susan
Rudbeckia laciniata - cutleaf coneflower
Rudbeckia subtomentosa - sweet coneflower
Rudbeckia triloba - brown-eyed Susan
Senecio suaveolens - false Indian plantain
Silphium laciniatum - compass plant
Solidago altissima - late goldenrod
Solidago caesia - blue-stem goldenrod
Solidago canadensis - Canada goldenrod
Solidago flexicaulis - zigzag goldenrod
Solidago gigantea - giant goldenrod
Solidago juncea - early goldenrod
Solidago missouriensis - Missouri goldenrod
Solidago nemoralis - gray goldenrod
Solidago ohioensis - Ohio goldenrod
Solidago patula - rough-leaved goldenrod
Solidago ptarmicoides - upland white aster
Solidago riddellii - Riddell’s goldenrod
Solidago rigida - stiff-leaved goldenrod
Solidago rugosa - wrinkle-leaf goldnenrod
Solidago sempervirens - seaside goldenrod
Solidago speciosa - showy goldenrod
Solidago uliginosa - bog goldenrod
Solidago ulmifolia - elm-leaf goldenrod
Sonchus asper - spiny sowthistle
Sonchus oleraceus - common sowthistle
Symphyotrichum boreale - northern bog aster
Symphyotrichum cordifolium - common blue wood aster
Symphyotrichum firmum - glossy-leaved aster
Symphyotrichum pilosum var. pilosum - hairy white oldfield aster
Symphyotrichum racemosum - smooth white oldfield aster
Symphyotrichum sericeum - western silver aster
Tanacetum vulgare - common tansy
Taraxacum officinale - common dandelion
Thelesperma megapotamicum - Hopi tea greenthread
Tragopogon dubius - yellow salsify
Tragopogon pratensis - meadow salsify
Vernonia fasciculata - prairie ironweed
Vernonia gigantea - giant ironweed
Vernonia missurica - Missouri ironweed
Xanthium strumarium - rough cocklebur
Impatiens pallida - pale touch-me-not
Berberis aquifolium - hollyleaved barberry
Berberis thunbergii - Japanese barberry
Alnus glutinosa - European alder
Betula nigra - river birch
Betula papyrifera - paper birch
Betula pendula - European white birch
Betula pumila - bog birch
Corylus americana - American hazelnut
Ostrya virginiana - Eastern hop hornbeam
Campsis radicans - trumpet creeper
Catalpa speciosa - northern catalpa
Woodwardia areolata - netted chainfern
Woodwardia virginica - Virginia chain fern
Echium vulgare - common vipersbugloss
Ellisia nyctelea - false babyblueeyes
Hackelia virginiana - beggar's lice
Hydrophyllum appendiculatum - notchbract waterleaf
Hydrophyllum virginianum - Virginia waterleaf
Myosotis laxa - bay forget-me-not
Myosotis scorpioides - true forget-me-not
Myosotis stricta - small-flowered forget- me-not
Myosotis verna - spring forget-me-not
Alliaria petiolata - garlic mustard
Arabidopsis thaliana - mouse-ear cress
Barbarea vulgaris - winter cress
Berteroa incana - hoary alyssum
Boechera laevigata - smooth rockcress
Brassica nigra - black mustard
Brassica rapa - field mustard
Cakile edentula - American searocket
Capsella bursa-pastoris - shepherd's purse
Cardamine bulbosa - bulbous bittercress
Cardamine concatenata - cutleaf toothwort
Cardamine douglassii - limestone bittercress
Cardamine hirsuta - hairy bittercress
Cardamine impatiens - narrowleaf bittercress
Cardamine parviflora - sand bittercress
Cardamine pensylvanica - Quaker bittercress
Descurainia sophia - herb sophia
Diplotaxis muralis - annual wallrocket
Draba reptans - Carolina draba
Draba verna - whitlow grass
Erysimum cheiranthoides - wormseed mustard
Erysimum repandum - spreading wallflower
Hesperis matronalis - dame's rocket
Lepidium campestre - field pepperweed
Lepidium densiflorum - common pepperweed
Lepidium draba - globed-podded hoarycress or whitetop
Lepidium virginicum - Virginia pepperweed
Lunaria annua - annual honesty
Rapistrum rugosum - annual bastardcabbage
Rorippa sessiliflora - stalkless yellowcress
Sinapis arvensis - charlock mustard
Sisymbrium altissimum - tall tumblemustard
Teesdalia nudicaulis - barestem teesdalia
Thlaspi arvense - field pennycress
Turritis glabra - tower rockcress
Pachysandra terminalis - Japanese pachysandra
Brasenia schreberi - Schreber's watershield
Opuntia humifusa - pricklypear
Campanula americana - American bellflower
Campanula aparinoides - marsh bellflower
Campanula rapunculoides - creeping bellflower
Campanula rotundifolia - bluebell bellflower
Lobelia cardinalis - cardinalflower
Lobelia inflata - Indian tobacco
Lobelia kalmii - brook lobelia
Lobelia siphilitica - great blue lobelia
Lobelia spicata - pale-spike lobelia
Triodanis perfoliata - clasping Venus' looking-glass
Cannabis sativa - marijuana
Celtis occidentalis - common hackberry
Celtis tenuifolia - Georgia hackberry
Humulus japonicus - Japanese hop
Humulus lupulus - common hop
Dipsacus fullonum - Fuller's teasel
Lonicera dioica - limber honeysuckle
Lonicera japonica - Japanese honeysuckle
Lonicera maackii - Amur honeysuckle bush
Lonicera reticulata - grape honeysuckle
Lonicera ruprechtiana - Manchurian honeysuckle
Lonicera tatarica - bush honeysuckle
Lonicera x bella - Bell's honeysuckle
Lonicera x minutiflora - smallflower honeysuckle
Lonicera x xylosteoides - fly honeysuckle
Symphoricarpos orbiculatus - Indiancurrant coralberry
Triosteum aurantiacum - orangefruit horse-gentian
Valerianella chenopodiifolia - goosefoot cornsalad
Arenaria serpyllifolia - thymeleaf sandwort
Cerastium brachypodum - shortstalk chickweed
Cerastium semidecandrum - five-stamen mouse-ear chickweed
Dianthus armeria - deptford pink
Dianthus barbatus - sweetwilliam
Gypsophila scorzonerifolia - glandular baby's-breath
Holosteum umbellatum - jagged chickweed
Minuartia tenella - slender stitchwort
Moehringia lateriflora - bluntleaf sandwort
Myosoton aquaticum - giant chickweed
Scleranthus annuus - annual knawel
Silene antirrhina - sleepy silene
Silene armeria - Sweet-William catchfly
Silene coronaria - rose campion
Silene csereii - biennial campion
Silene dioica - red campion
Silene latifolia - white campion
Silene noctiflora - night-flowering catchfly
Silene stellata - starry campion
Silene vulgaris - bladder campion
Spergularia media - greater sea-spurrey
Stellaria graminea - common starwort
Stellaria longifolia - longleaf starwort
Stellaria media - common chickweed
Celastrus orbiculatus - oriental bittersweet
Euonymus alatus - winged burning bush
Euonymus europaeus - European spindletree
Euonymus fortunei - winter creeper
Euonymus hamiltonianus - Hamilton's strawberry bush
Euonymus obovatus - running strawberry bush
Parnassia glauca - fen grass of Parnassus
Helianthemum bicknellii - hoary frostweed
Helianthemum canadense - Canada frostweed
Hudsonia tomentosa - sand golden-heather
Lechea minor - thymeleaved pinweed
Lechea mucronata - hairy pinweed
Lechea pulchella - Leggett's pinweed
Lechea stricta - prairie pinweed
Lechea tenuifolia - narrowleaf pinweed
Lechea villosa - hairy pinweed
Uvularia grandiflora - large-flower bellwort
Uvularia sessilifolia - sessile-leaf bellwort
Commelina communis - Asiatic dayflower
Commelina erecta - whitemouth dayflower
Tradescantia ohiensis - Ohio spiderwort
Tradescantia subaspera - zigzag spiderwort
Calystegia sepium subsp. sepium - hedge false bindweed
Calystegia spithamaea - low false bindweed
Convolvulus arvensis - field bindweed
Cuscuta cephalanthi - buttonbush dodder
Cuscuta coryli - hazel dodder
Cuscuta glomerata - rope dodder
Cuscuta pentagona - fiveangled dodder
Cuscuta polygonorum - smartweed dodder
Ipomoea hederacea - ivyleaf morning-glory
Ipomoea pandurata - bigroot morningglory
Ipomoea purpurea - tall morning-glory
Cornus alternifolia - alternate-leaf dogwood
Cornus canadensis - Canadian bunchberry
Cornus florida - flowering dogwood
Cornus racemosa - gray dogwood
Cornus rugosa - round-leaf dogwood