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Families: 116
Genera: 488
Species: 1133 (species rank)
Total Taxa: 1170 (including subsp. and var.)

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Sambucus racemosa - scarlet elderberry
Viburnum acerifolium L. - maple-leaved viburnum
Viburnum lentago L. - sheepberry
Viburnum opulus L. - high-bush cranberry
Viburnum trilobum Marshall - high-bush cranberry
Alisma subcordatum Raf. - southern water-plantain
Alisma triviale Pursh - northern water-plantain
Sagittaria sp. L. - Arrowhead
Sagittaria cristata Engelm. - crested arrow-head
Sagittaria graminea subsp. graminea - grass-leaved sagittaria
Amaranthus albus L. - white amaranth
Amaranthus blitoides S.Watson - prostrate pigweed
Amaranthus hypochondriacus L. - Prince-of-Wales'-feather
Amaranthus retroflexus L. - wild-beet amaranth
Bassia hyssopifolia (Pall.) Kuntze - fivehorn smotherweed
Chenopodium glaucum var. glaucum - oak-leaved goosefoot
Chenopodium simplex (Torr.) Raf. - maple-leaved goosefoot
Chenopodium strictum Roth - late-flowering goosefoot
Salsola tragus L. - tumbleweed
Allium cernuum Roth - nodding wild onion
Rhus typhina L. - staghorn sumac
Carum carvi L. - caraway
Cicuta bulbifera L. - bulblet water-hemlock
Cicuta maculata L. - spotted water-hemlock
Daucus carota L. - wild carrot
Heracleum maximum W.Bartram - American cow-parsnip
Osmorhiza berteroi DC. - tapering sweet-root
Osmorhiza longistylis (Torr.) DC. - smooth sweet cicely
Pastinaca sativa L. - wild parsnip
Pimpinella saxifraga L. - solid-stem burnet-saxifrage
Sanicula canadensis L. - Canadian sanicle
Sanicula marilandica L. - Maryland sanicle
Sium suave Walter - water-parsnip
Apocynum androsaemifolium L. - spreading dogbane
Asclepias verticillata L. - whorled milkweed
Vinca minor L. - running-myrtle
Vincetoxicum nigrum (L.) Moench - black swallow-wort
Ilex verticillata (L.) A.Gray - common winterberry
Calla palustris L. - wild calla
Lemna minor L. - small duckweed
Lemna trisulca L. - star duckweed
Lemna turionifera Landolt - Turion duckweed
Aralia hispida Vent. - bristly sarsaparilla
Aralia nudicaulis L. - wild sarsaparilla
Aralia racemosa L. - life-of-man
Panax trifolius L. - groundnut
Asarum canadense L. - wild-ginger
Asparagus officinalis L. - garden asparagus
Convallaria majalis var. majalis - European lily-of-the-valley
Maianthemum canadense Desf. - wild lily-of-the-valley
Maianthemum canadense var. canadense - wild lily-of-the-valley
Maianthemum stellatum (L.) Link - starry false Solomon's-seal
Maianthemum trifolium (L.) Sloboda - three-leaf Solomon's-plume
Muscari botryoides (L.) Mill. - common grape-hyacinth
Asplenium trichomanes L. - maidenhair spleenwort
Ambrosia psilostachya DC. - western ragweed
Ambrosia trifida L. - horse-cane
Antennaria neglecta Greene - field pussy-toes
Anthemis cotula L. - stinking-cotula
Arctium tomentosum Mill. - woolly burdock
Artemisia biennis Willd. - biennial wormwood
Artemisia stelleriana Besser - dusty-miller sage-wort
Bellis perennis L. - lawn daisy
Bidens sp. L. - Beggarticks
Bidens cernua L. - nodding bur-marigold
Bidens connata Muhl. ex Willd. - purple-stemmed tickseed
Bidens frondosa L. - devil's beggar-ticks
Bidens tripartita L. - swamp tickseed
Bidens vulgata Greene - tall beggar-ticks
Centaurea jacea L. - brown-ray knapweed
Centaurea montana L. - mountain cornflower
Cirsium muticum Michx. - swamp thistle
Coreopsis lanceolata L. - sand tickseed
Doellingeria umbellata (Mill.) Nees - tall flat-topped white aster
Erigeron sp. L. - Fleabane
Erigeron annuus (L.) Pers. - eastern daisy fleabane
Erigeron philadelphicus - Philadelphia daisy
Eurybia macrophylla (L.) Cass. - large-leaved aster
Euthamia graminifolia (L.) Nutt. - grass-leaved goldenrod
Eutrochium maculatum L. - spotted Joe-Pye-weed
Galinsoga sp. - Quickweed
Hasteola suaveolens (L.) Pojark. - sweet Indian-plantain
Helenium autumnale L. - common sneezeweed
Helianthus decapetalus L. - thin-leaved sunflower
Helianthus maximiliani Schrad. - Maximilian's sunflower
Helianthus strumosus L. - pale-leaved woodland sunflower
Helianthus tuberosus L. - woodland sunflower
Heliopsis helianthoides (L.) Sweet - sunflower-everlasting
Hieracium sp. L. - Hawkweed
Hieracium caespitosum Dumort. - yellow king-devil
Hieracium murorum L. - wall hawkweed
Hieracium scabrum Michx. - sticky hawkweed
Hieracium umbellatum L. - northern hawkweed
Hypochaeris radicata L. - spotted cat's-ear
Lactuca canadensis L. - wild lettuce
Lapsana communis L. - nipplewort
Leucanthemum sp. - Ox-Eye Daisy
Liatris aspera Michx. - rough gayfeather
Packera aurea (L.) A.Löve & D.Löve - heart-leaved groundsel
Petasites frigidus - northern sweet-colt's-foot
Prenanthes alba L. - white rattlesnakeroot
Ratibida pinnata (Vent.) Barnhart - pinnate prairie coneflower
Rudbeckia hirta - black-eyed Susan
Rudbeckia laciniata L. - wild golden-glow
Rudbeckia triloba var. triloba - three-lobed coneflower
Senecio vulgaris L. - common groundsel
Solidago sp. L. - Goldenrod
Solidago canadensis L. - common goldenrod
Solidago flexicaulis L. - zigzag goldenrod
Solidago gigantea Aiton - smooth goldenrod
Solidago juncea Aiton - early goldenrod
Solidago nemoralis Aiton - old-field goldenrod
Solidago riddellii Frank - Riddell's goldenrod
Solidago rigida L. - stiff goldenrod
Solidago uliginosa Nutt. - northern bog goldenrod
Sonchus sp. L. - Sow-Thistle
Sonchus arvensis L. - perennial sow-thistle
Sonchus arvensis subsp. arvensis L. - perennial sow-thistle
Sonchus asper (L.) Hill - spiny-leaf sow-thistle
Sonchus oleraceus L. - field sow-thistle
Tanacetum balsamita L. - mint-geranium
Tephroseris palustris (L.) Rchb. - northern swamp groundsel
Tragopogon dubius Scop. - yellow salsify
Tragopogon pratensis L. - yellow goat's-beard
Vernonia fasciculata Michx. - smooth ironweed
Xanthium strumarium L. - rough cocklebur
Impatiens capensis Meerb. - spotted touch-me-not
Berberis thunbergii DC. - Japanese barberry
Podophyllum peltatum L. - wild mandrake
Betula cordifolia Regel - mountain white birch
Betula pumila L. - swamp birch
Betula x sandbergii Britton - Sandberg's birch
Corylus cornuta - beaked hazelnut
Cynoglossum boreale Fernald - northern wild comfrey
Echium vulgare L. - viper's-bugloss
Hydrophyllum virginianum L. - Virginia waterleaf
Lithospermum latifolium Michx. - broad-leaved gromwell
Lithospermum officinale L. - European gromwell
Myosotis sp. L. - Scorpion Grass
Myosotis arvensis (L.) Hill - field forget-me-not
Myosotis scorpioides L. - water scorpion-grass
Myosotis sylvatica Ehrh. ex Hoffm. - woodland forget-me-not
Arabis sp. L. - Rockcress
Arabis caucasica Willd. - garden rock-cress
Arabis pycnocarpa M.Hopkins - hairy rock-cress
Barbarea sp. - Yellow-Rocket
Berteroa incana (L.) DC. - hoary-alyssum
Boechera stricta (Graham) Al-Shehbaz - Drummond's rock-cress
Brassica sp. L. - Mustard
Cakile edentula (Bigelow) Hook. - American sea-rocket
Camelina microcarpa Andrz. ex DC. - small-fruited false flax
Camelina sativa (L.) Crantz - large-seed false flax
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Draba arabisans Michx. - rock whitlow-grass
Draba verna L. - vernal whitlow-grass
Erysimum sp. L. - Wallflower
Erysimum cheiranthoides L. - worm-seed wallflower
Hesperis matronalis L. - dame's rocket
Lepidium densiflorum Schrad. - small peppergrass
Rorippa palustris (L.) Besser - common yellow-cress
Sinapis arvensis L. - charlock mustard
Sisymbrium altissimum L. - tall tumble mustard
Thlaspi arvense L. - field pennycress
Turritis glabra L. - tower rock-cress
Campanula aparinoides Pursh - marsh bellflower
Campanula glomerata L. - Dane's blood
Campanula persicifolia L. - peach-leaved bellflower
Campanula rapunculoides L. - rover bellflower
Lobelia inflata L. - Indian-tobacco
Lobelia kalmii L. - Ontario lobelia
Lobelia siphilitica L. - great blue lobelia
Lobelia spicata Lam. - spiked lobelia
Diervilla lonicera Mill. - northern bush-honeysuckle
Dipsacus laciniatus L. - cut-leaved teasel
Lonicera sp. L. - Honeysuckle
Lonicera dioica L. - red honeysuckle
Lonicera hirsuta Eaton - hairy honeysuckle
Lonicera morrowii A.Gray - Morrow's honeysuckle
Lonicera oblongifolia (Goldie) Hook. - swamp fly honeysuckle
Lonicera tatarica L. - Tartarian honeysuckle
Lonicera X bella Zabel - white-bell honeysuckle
Lonicera xylosteum L. - European fly honeysuckle
Triosteum aurantiacum var. aurantiacum - orange-fruit horse-gentian
Valeriana officinalis L. - garden valerian
Arenaria serpyllifolia - thyme-leaved sandwort
Atocion armeria (L.) Raf. - sweet-William silene
Cerastium fontanum - common mouse-ear chickweed
Cerastium nutans - nodding mouse-ear chickweed
Cerastium tomentosum L. - snow-in-summer
Dianthus armeria - Deptford pink
Dianthus barbatus - sweet-William
Dianthus deltoides - meadow pink
Dianthus plumarius - garden pink
Petrorhagia saxifraga - saxifrage pink
Silene antirrhina L. - sleepy silene
Silene latifolia Poir. - white cockle
Silene noctiflora L. - sticky cockle
Spergula arvensis L. - corn spurry
Stellaria longifolia Muhl. ex Willd. - long-leaved stitchwort
Stellaria media (L.) Vill. - common chickweed
Celastrus scandens L. - climbing bittersweet
Euonymus alatus (Thunb.) Siebold - winged spindle-tree
Parnassia glauca Raf. - fen grass-of-Parnassus
Uvularia grandiflora Sm. - large-flowered bellwort
Commelina communis L. - common dayflower
Calystegia sepium (L.) R.Br. - hedge false bindweed
Convolvulus arvensis L. - field bindweed
Ipomoea purpurea (L.) Roth - tall morning-glory
Cornus alternifolia L.f. - pagoda dogwood
Cornus canadensis L. - dwarf cornel
Cornus rugosa Lam. - round-leaved dogwood
Cornus sericea L. - red osier dogwood
Sedum acre L. - yellow sedum
Juniperus communis L. - common juniper
Thuja occidentalis L. - northern white-cedar
Carex sp. L. - Sedge
Carex albursina E.Sheld. - white bear sedge
Carex arcta Boott - northern clustered sedge
Carex arctata Boott - drooping woodland sedge
Carex aurea Nutt. - golden-fruited sedge
Carex backii W.Boott - Rocky Mountain sedge
Carex blanda Dewey - wood sedge
Carex brevior (Dewey) Mack. - plains oval sedge
Carex brunnescens - green bog sedge
Carex buxbaumii Wahlenb. - Buxbaum's sedge
Carex canescens L. - silvery sedge
Carex capillaris L. - hair-like sedge
Carex castanea Wahlenb. - chestnut woodland sedge
Carex communis var. communis - fibrous-root sedge
Carex comosa Boott - bristly sedge
Carex concinna R.Br. - low northern sedge
Carex crawei Dewey - early fen sedge
Carex cryptolepis Mack. - small yellow sedge
Carex deweyana - Dewey's sedge
Carex diandra Schrank - lesser panicled sedge
Carex disperma Dewey - two-seeded bog sedge
Carex eburnea Boott - bristle-leaf sedge
Carex flava L. - yellow sedge
Carex foenea Willd. - bronze-headed oval sedge
Carex garberi Fernald - false golden sedge
Carex gracillima Schwein. - purple-sheathed graceful sedge
Carex granularis Muhl. ex Willd. - limestone meadow sedge
Carex grayi J.Carey - Gray's sedge
Carex hirtifolia Mack. - pubescent sedge
Carex hitchcockiana Dewey - Hitchcock's sedge
Carex interior L.H.Bailey - inland star sedge
Carex intumescens Rudge - swollen sedge
Carex lacustris Willd. - rip-gut sedge
Carex leptonervia (Fernald) Fernald - nerveless woodland sedge
Carex limosa L. - mud sedge
Carex ormostachya Wiegand - necklace-spike wood sedge
Carex peckii Howe - Peck's sedge
Carex pellita Willd. - broad-leaved woolly sedge
Carex pensylvanica Lam. - Pennsylvania sedge
Carex plantaginea Lam. - plantain-leaved wood sedge
Carex prairea Dewey - prairie sedge
Carex prasina Wahlenb. - leek-green sedge
Carex pseudocyperus L. - false bristly sedge
Carex radiata (Wahlenb.) Small - straight-styled wood sedge
Carex retrorsa Schwein. - retrorse sedge
Carex richardsonii R.Br. - Richardson's sedge
Carex sartwellii Dewey - Sartwell's sedge
Carex scoparia var. scoparia - lance-fruited oval sedge
Carex sparganioides Muhl. ex Willd. - loose-headed bracted sedge
Carex sterilis Willd. - fen star sedge
Carex stipata - owl-fruit sedge
Carex stricta Lam. - uptight sedge
Carex sychnocephala J.Carey - many-headed sedge
Carex tenera Dewey - narrow-leaved oval sedge
Carex tonsa var. rugosperma (Mack.) Crins - wrinkled-seeded oak sedge
Carex tonsa var. tonsa - smooth-fruited oak sedge
Carex trisperma Dewey - three-seeded sedge
Carex tuckermanii Dewey - Tuckerman's sedge
Carex utriculata Boott - Northwest Territory sedge
Carex vaginata Tauscher - sheathed sedge
Carex vesicaria L. - tufted lake sedge
Carex woodii Dewey - Wood's stiff sedge
Cyperus bipartitus Torr. - slender flat sedge
Cyperus odoratus L. - rusty flat sedge
Cyperus schweinitzii Torr. - Schweinitz's flat sedge
Eleocharis compressa var. compressa - flat-stemmed spike-rush
Eleocharis elliptica Kunth - elliptic spike-rush
Eriophorum vaginatum L. - tussock cotton-grass
Eriophorum virginicum L. - tawny cotton-grass
Rhynchospora sp. - Beak Sedge
Rhynchospora alba (L.) Vahl - white beak-rush
Rhynchospora capillacea Torr. - needle beak sedge
Schoenoplectus pungens (Vahl) Palla - common three-square bulrush
Scirpus atrocinctus Fernald - black-girdled wool-grass
Scirpus atrovirens Willd. - dark-green bulrush
Drosera rotundifolia L. - round-leaved sundew
Cystopteris sp. Bernh. - Bladder Fern
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris fragilis (L.) Bernh. - northern fragile fern
Cystopteris laurentiana (Weath.) Blasdell - St. Lawrence bladder fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Onoclea sensibilis L. - sensitive fern
Shepherdia canadensis (L.) Nutt. - russet buffalo-berry
Equisetum sp. L. - Scouring-Rush
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum laevigatum A.Braun - smooth scouring rush
Equisetum palustre L. - marsh horsetail