List of Canadian plants by family A

Main page: List of Canadian plants by family

Families: A | B | C | D | E | F | G | H | I J K | L | M | N | O | P Q | R | S | T | U V W | X Y Z

Acanthaceae[]

Justicia americana — common water-willow

Aceraceae[]

Acer circinatum — vine maple
Acer glabrum — Douglas maple
Acer macrophyllum — bigleaf maple
Acer negundo — box-elder
Acer nigrum — black maple
Acer pensylvanicum — striped maple

Acer rubrum — red maple
Acer saccharinum — silver maple
Acer saccharum — sugar maple
Acer spicatum — mountain maple
Acer × freemanii — Freeman's maple

Acoraceae[]

Acorus americanus — sweetflag

Adelanthaceae[]

Adoxaceae[]

Adoxa moschatellina — muskroot
Viburnum acerifolium — mapleleaf viburnum
Viburnum edule — squashberry
Viburnum lantanoides — alderleaf viburnum
Viburnum lentago — nannyberry
Viburnum nudum — possum-haw viburnum
Viburnum opulus — guelder-rose viburnum
Viburnum rafinesquianum — downy arrowwood
Viburnum recognitum — northern arrowwood

Agavaceae[]

Yucca filamentosa — common yucca

Yucca glauca — small soapweed yucca

Alismataceae[]

Alisma gramineum — narrowleaf water-plantain
Alisma subcordatum — broad-leaved water-plantain
Alisma triviale — northern water-plantain
Sagittaria brevirostra — short-beaked arrowhead
Sagittaria calycina — longlobe arrowhead

Sagittaria cristata — crested arrowhead
Sagittaria cuneata — Wapatum arrowhead
Sagittaria graminea — grassleaf arrowhead
Sagittaria latifolia — broadleaf arrowhead
Sagittaria rigida — sessile-fruit arrowhead

Amaranthaceae[]

Amaranthus albus — white pigweed
Amaranthus californicus — California amaranth
Amaranthus powellii — green amaranth

Amaranthus rudis — tall amaranth
Amaranthus tuberculatus — roughfruit amaranth

Amblystegiaceae[]

Amblystegium serpens — amblystegium moss
Calliergon cordifolium — calliergon moss
Calliergon giganteum — giant calliergon moss
Calliergon richardsonii
Calliergon trifarium
Campylium polygamum — campylium moss
Campylium stellatum — yellow starry fen moss
— drepanocladus moss
Hamatocaulis vernicosus
Hygroamblystegium tenax

Hygrohypnum molle
Hygrohypnum styriacum
Leptodictyum riparium
— limprichtia moss
Palustriella commutata
Warnstorfia exannulata — warnstorfia moss
Warnstorfia fluitans — warnstorfia moss

Anacardiaceae[]

Rhus aromatica — fragrant sumac
Rhus copallinum — winged sumac
Rhus glabra — smooth sumac
Rhus trilobata — skunkbush
Rhus typhina — staghorn sumac

Toxicodendron diversilobum — western poison-oak
Toxicodendron radicans — eastern poison-ivy
Toxicodendron rydbergii — northern poison-oak
Toxicodendron vernix — poison-sumac

Andreaeaceae[]

Andreaea nivalis
Andreaea rothii
Andreaea rupestris

Andreaeobryaceae[]

Andreaeobryum macrosporum

Aneuraceae[]

Riccardia multifida — comb liverwort

Annonaceae[]

Asimina triloba — pawpaw

Anomodontaceae[]

Anomodon attenuatus

Antheliaceae[]

Anthocerotaceae[]

Anthoceros agrestis

Apiaceae[]

Angelica archangelica — Norwegian angelica
Angelica arguta — Lyall's angelica
Angelica atropurpurea — great angelica
— Dawson's angelica
Angelica genuflexa — kneeling angelica
— St. Lawrence angelica
Angelica lucida — seacoast angelica
Angelica venenosa — hairy angelica
Berula erecta — wild parsnip
— American thorowax
Chaerophyllum procumbens — spreading chervil
Chaerophyllum tainturieri — Tainturier's chervil
Cicuta bulbifera — bulb-bearing water-hemlock
Cicuta douglasii — western water-hemlock
Cicuta maculata — spotted water-hemlock
Cicuta virosa — MacKenzie's water-hemlock
Cnidium cnidiifolium — Jakutsk snow parsley
— Chinese hemlock-parsley
— western hemlock-parsley
Cryptotaenia canadensis — Canada honewort
Cymopterus acaulis — plains wavewing
Daucus pusillus — southwestern carrot
Erigenia bulbosa — harbinger-of-spring
Glehnia littoralis — American glehnia
Heracleum maximum — cow-parsnip
Hydrocotyle americana — American water-pennywort
Hydrocotyle umbellata — many-flowered pennywort
Hydrocotyle verticillata — whorled pennywort
— Calder's lovage
— Canby's wild lovage
Ligusticum scoticum — Scotch lovage
— Idaho lovage
Lilaeopsis chinensis — eastern lilæopsis
Lilaeopsis occidentalis — western lilæopsis
Lomatium ambiguum — streambank desert-parsley
Lomatium brandegeei — Brandegee's desert-parsley
Lomatium cous — cousroot desert-parsley
Lomatium dissectum — fernleaf desert-parsley
Lomatium foeniculaceum — carrotleaf desert-parsley

Lomatium geyeri — Geyer's desert-parsley
Lomatium grayi — mountain desert-parsley
Lomatium macrocarpum — largefruit desert-parsley
Lomatium martindalei — coast range lomatium
Lomatium nudicaule — nakedstem desert-parsley
— Oriental desert-parsley
— Sandberg's desert-parsley
— umbrella desert-parsley
Lomatium triternatum — ternate desert-parsley
Lomatium utriculatum — foothill desert-parsley
— wild parsley
Oenanthe sarmentosa — water-parsley
Osmorhiza berteroi — Chilean sweet-cicely
Osmorhiza claytonii — hairy sweet-cicely
Osmorhiza depauperata — bluntfruit sweet-cicely
Osmorhiza longistylis — smoother sweet-cicely
Osmorhiza occidentalis — western sweet-cicely
— purple sweet-cicely
Oxypolis occidentalis — western cowbane
Oxypolis rigidior — stiff cowbane
Perideridia gairdneri — Gairdner's yampah
— Macoun's podistera
— Yukon podistera
Sanicula arctopoides — bear's-foot sanicle
Sanicula bipinnatifida — purple black snakeroot
Sanicula canadensis — short-styled sanicle
Sanicula crassicaulis — Pacific black snakeroot
Sanicula graveolens — sierra sanicle
Sanicula marilandica — Maryland black snakeroot
Sanicula odorata — clustered black snakeroot
— large-fruited sanicle
Sium suave — hemlock water-parsnip
Taenidia integerrima — yellow pimpernel
— hairyjoint meadow-parsnip
Thaspium trifoliatum — purple meadow-parsnip
Yabea microcarpa — California hedge-parsley
Zizia aptera — golden alexanders
Zizia aurea — common alexanders

Apocynaceae[]

Apocynum androsaemifolium — spreading dogbane
Apocynum cannabinum — clasping-leaf dogbane

Apocynum × floribundum — hybrid dogbane

Aquifoliaceae[]

Ilex glabra — ink-berry
Ilex verticillata — black holly

Nemopanthus mucronatus — mountain holly

Araceae[]

Arisaema dracontium — green dragon
Arisaema triphyllum — swamp Jack-in-the-pulpit
Calla palustris — wild calla

Lysichiton americanus — yellow skunk-cabbage
Peltandra virginica — green arrow-arum
Symplocarpus foetidus — skunk-cabbage

Araliaceae[]

Aralia hispida — bristly sarsaparilla
Aralia nudicaulis — wild sarsaparilla
Aralia racemosa — American spikenard

Oplopanax horridus — Devil's-club
Panax quinquefolius — American ginseng
Panax trifolius — dwarf ginseng

Archidiaceae[]

Aristolochiaceae[]

Asarum canadense — Canada wild-ginger

Asarum caudatum — long-tailed wild-ginger

Arnelliaceae[]

Asclepiadaceae[]

Asclepias exaltata — poke milkweed
Asclepias hirtella — green milkweed
Asclepias incarnata — swamp milkweed
Asclepias lanuginosa — woolly milkweed
— dwarf milkweed
Asclepias purpurascens — purple milkweed
Asclepias quadrifolia — whorled milkweed

Asclepias speciosa — showy milkweed
Asclepias sullivantii — prairie milkweed
Asclepias syriaca — Kansas milkweed
Asclepias tuberosa — butterfly milkweed
Asclepias verticillata — whorled milkweed
Asclepias viridiflora — green milkweed

Aspleniaceae[]

— ladder spleenwort
Asplenium platyneuron — ebony spleenwort
Asplenium rhizophyllum — walking-fern spleenwort
Asplenium ruta-muraria — wallrue spleenwort

Asplenium scolopendrium — hart's-tongue fern
Asplenium trichomanes — maidenhair spleenwort
Asplenium viride — green spleenwort

Asteraceae[]

Achillea millefolium — common yarrow
Achillea sibirica — Siberian yarrow
Adenocaulon bicolor — American trail-plant
Ageratina altissima — white snakeroot
Agoseris aurantiaca — orange-flowered false-dandelion
Agoseris gaspensis — Gaspé Peninsula agoseris
Agoseris glauca — pale goat-chicory
Agoseris grandiflora — largeflower false-dandelion
Agoseris heterophylla — annual false-dandelion
Agoseris lackschewitzii — pink agoseris
Almutaster pauciflorus — marsh alkali aster
Ambrosia acanthicarpa — flatspine bursage
Ambrosia artemisiifolia — annual ragweed
Ambrosia chamissonis — silver bursage
Ambrosia coronopifolia — western ragweed
Ambrosia psilostachya — nakedspike ambrosia
Ambrosia trifida — great ragweed
Anaphalis margaritacea — pearly everlasting
Antennaria alpina — alpine pussytoes
Antennaria anaphaloides — handsome pussytoes
Antennaria aromatica — aromatic pussytoes
Antennaria corymbosa — meadow pussytoes
Antennaria densifolia — dense-leaved antennaria
Antennaria dimorpha — two-form pussytoes
Antennaria eucosma — Newfoundland pussytoes
Antennaria flagellaris — stoloniferous pussytoes
Antennaria friesiana — Fries' pussytoes
Antennaria howellii — small pussytoes
Antennaria lanata — white-margined pussytoes
Antennaria luzuloides — silvery-brown pussytoes
Antennaria media — Stony Mountain pussytoes
Antennaria microphylla — small-leaf cat's-foot
Antennaria monocephala — single-head pussytoes
Antennaria neglecta — field pussytoes
Antennaria parlinii — Parlin's pussytoes
Antennaria parvifolia — Nuttall's pussytoes
Antennaria plantaginifolia — plantainleaf pussytoes
Antennaria pulcherrima — handsome pussytoes
Antennaria racemosa — Hooker's pussytoes
Antennaria rosea — rosy pussytoes
Antennaria stenophylla — narrowleaf pussytoes
Antennaria umbrinella — brown pussytoes
Arnica amplexicaulis — streambank arnica
Arnica angustifolia — narrowleaf leopardbane
Arnica chamissonis — leafy arnica
Arnica cordifolia — heart-leaved arnica
Arnica frigida — snow leopardbane
Arnica fulgens — hillside arnica
Arnica gracilis — slender leopardbane
Arnica lanceolata
Arnica latifolia — mountain arnica
Arnica lessingii — Lessing's arnica
Arnica lonchophylla — northern arnica
Arnica longifolia — longleaf arnica
Arnica louiseana — Lake Louise arnica
Arnica mollis — hairy arnica
Arnica parryi — nodding arnica
Arnica rydbergii — subalpine arnica
Arnica sororia — twin arnica
— rayless arnica
Arnoglossum plantagineum — Indian-plantain
Artemisia alaskana — Alaska wormwood
Artemisia arctica — boreal sagebrush
Artemisia biennis — biennial wormwood
Artemisia campestris — Pacific wormwood
Artemisia cana — hoary sagebrush
Artemisia dracunculus — dragon wormwood
Artemisia frigida — prairie sagebrush
Artemisia furcata — three-fork wormwood
Artemisia globularia — arctic wormwood
— Pacific alpine wormwood
— Siberian wormwood
Artemisia lindleyana — Columbia River wormwood
Artemisia longifolia — longleaf wormwood
Artemisia ludoviciana — white sagebrush
Artemisia michauxiana — Michaux's wormwood
Artemisia rupestris — rock wormwood
Artemisia suksdorfii — coastal wormwood
Artemisia tilesii — Tilesius' wormwood
Artemisia tridentata — big sagebrush
Artemisia tripartita — three-tip sagebrush
Aster alpinus — alpine aster
Baccharis halimifolia — eastern baccharis
Balsamorhiza deltoidea — deltoid balsamroot
Balsamorhiza sagittata — arrowleaf balsamroot
Bidens amplissima — Vancouver Island beggarticks
Bidens cernua — nodding beggarticks
Bidens connata — purplestem beggarticks
Bidens coronata — tickseed sunflower
Bidens discoidea — swamp beggarticks
Bidens eatonii — Eaton's beggarticks
Bidens frondosa — Devil's beggarticks
Bidens heterodoxa — Connecticut beggarticks
Bidens hyperborea — estuary beggarticks
Bidens tripartita — three-lobe beggarticks
Bidens vulgata — tall bur-marigold
Boltonia asteroides — aster-like boltonia
Brickellia grandiflora — tassel flower
Brickellia oblongifolia — narrowleaf brickell-bush
Cacaliopsis nardosmia — silvercrown
Canadanthus modestus — great northern aster
Chaenactis douglasii — hoary pincushion
Chrysothamnus viscidiflorus — sticky-leaf rabbitbrush
Cirsium brevistylum — shortstyle thistle
Cirsium canescens — prairie thistle
Cirsium discolor — field thistle
Cirsium drummondii — Drummond's thistle
Cirsium edule — edible thistle
Cirsium flodmanii — Flodman's thistle
Cirsium foliosum — leafy thistle
Cirsium hillii — Hill's thistle
Cirsium hookerianum — Hooker's thistle
Cirsium muticum — swamp thistle
Cirsium pitcheri — dune thistle
Cirsium scariosum
Cirsium undulatum — nodding thistle
Conyza canadensis — Canada horseweed
Coreopsis lanceolata — sand coreopsis
Coreopsis rosea — rose coreopsis
Coreopsis tinctoria — golden tickseed
Coreopsis tripteris — tall tickseed
Crepis atribarba — slender hawk's-beard
Crepis elegans — elegant hawk's-beard
Crepis intermedia — smallflower hawk's-beard
Crepis modocensis — Siskiyou hawk's-beard
Crepis nana — dwarf alpine hawk's-beard
Crepis occidentalis — grey hawk's-beard
Crepis runcinata — nakedstem hawk's-beard
Crocidium multicaule — common spring-gold
— arctic daisy
Doellingeria umbellata — flat-top white aster
Echinacea angustifolia — narrow-leaved purple coneflower
Echinacea pallida — pale purple coneflower
Eclipta prostrata — false daisy
Erechtites hieraciifolia — fireweed
Ericameria nauseosa — rubber rabbitbrush
Erigeron acris — bitter fleabane
Erigeron alpiniformis — alpine fleabane
Erigeron annuus — whitetop fleabane
Erigeron asper — rough fleabane
Erigeron aureus — alpine yellow fleabane
Erigeron borealis — boreal fleabane
Erigeron caespitosus — cæspitose fleabane
Erigeron compositus — dwarf mountain fleabane
Erigeron corymbosus — longleaf fleabane
Erigeron divergens — spreading fleabane
Erigeron elatus — tall bitter fleabane
Erigeron evermannii — Evermann's fleabane
Erigeron filifolius — threadleaf fleabane
Erigeron flagellaris — running fleabane
Erigeron formosissimus — beautiful fleabane
Erigeron glabellus — smooth fleabane
Erigeron grandiflorus — largeflower fleabane
Erigeron humilis — low fleabane
Erigeron hyperboreus — hyperboreal fleabane
Erigeron hyssopifolius — daisy fleabane
Erigeron lackschewitzii — front range fleabane
Erigeron lanatus — woolly fleabane
Erigeron leibergii — Leiberg's fleabane
Erigeron linearis — linearleaf fleabane
Erigeron lonchophyllus — short-ray fleabane
Erigeron mexiae — Mex' fleabane
Erigeron ochroleucus — buff fleabane
Erigeron pallens — pale fleabane
Erigeron peregrinus — foreign fleabane
Erigeron philadelphicus — Philadelphia fleabane
Erigeron poliospermus — hairyseed fleabane
Erigeron pulchellus — robin's-plantain
Erigeron pumilus — shaggy fleabane
Erigeron purpuratus — purple fleabane
Erigeron radicatus — tap-rooted fleabane
Erigeron salishii — Salish's daisy
Erigeron scotteri — Scotter's fleabane
Erigeron speciosus — Aspen fleabane
Erigeron strigosus — daisy fleabane
Erigeron subtrinervis — three-nerve fleabane
Erigeron uniflorus — one-flower fleabane
Erigeron yukonensis — Yukon fleabane
Eriophyllum lanatum — common woolly-sunflower
Eucephalus engelmannii — Engelmann's aster
Eucephalus paucicapitatus — olympic aster
Eupatorium altissimum — tall boneset
Eupatorium dubium — joe-pye thoroughwort
Eupatorium fistulosum — hollow joe-pyeweed
Eupatorium maculatum — spotted joe-pyeweed
Eupatorium perfoliatum — common boneset
Eupatorium purpureum — sweet joe-pyeweed
Eupatorium × truncatum
Eurybia conspicua — showy aster
Eurybia divaricata — white wood-aster
Eurybia macrophylla — largeleaf wood-aster
Eurybia merita — arctic aster
— pygmy wood-aster
Eurybia radula — rough wood-aster
Eurybia radulina — roughleaf aster
Eurybia schreberi — Schreiber's aster
Eurybia sibirica — Siberian aster
Euthamia caroliniana — slender fragrant goldenrod
Euthamia galetorum — narrowleaf fragrant goldenrod
Euthamia graminifolia — flat-top fragrant goldenrod
Euthamia gymnospermoides — viscid bushy goldenrod
Euthamia occidentalis — western fragrant goldenrod
Gaillardia aristata — great blanket-flower
Gaillardia pulchella — firewheel blanket-flower
Gamochaeta ustulata — featherweed
Gnaphalium obtusifolium — fragrant cudweed
Gnaphalium palustre — western marsh cudweed
— winged cudweed
Grindelia hirsutula — hairy gumweed
Grindelia integrifolia — Puget Sound gumweed
Grindelia nana — Idaho gumweed
Grindelia nuda — curly-top gumweed
Grindelia squarrosa — broadleaf gumweed
Grindelia stricta — Oregon gumweed
Gutierrezia sarothrae — broom snakeweed
Helenium autumnale — common sneezeweed
Helianthella uniflora — Rocky Mountain rockrose
Helianthus annuus — common sunflower
Helianthus couplandii — Coupland's sunflower
Helianthus decapetalus — thin-leaved sunflower
Helianthus divaricatus — woodland sunflower
Helianthus giganteus — tall sunflower
Helianthus maximiliani — Maximillian's sunflower
Helianthus nuttallii — Nuttall's sunflower
Helianthus pauciflorus — stiff sunflower
Helianthus petiolaris — prairie sunflower
Helianthus strumosus — paleleaf sunflower
Helianthus tuberosus — Jerusalem artichoke
Helianthus × laetiflorus — hybrid prairie sunflower
Heliopsis helianthoides — smooth oxeye
Heterotheca villosa — hairy false goldenaster
Hieracium albiflorum — whiteflower hawkweed
Hieracium canadense — Canada hawkweed
Hieracium cynoglossoides — hound's-tongue hawkweed
Hieracium gracile — alpine hawkweed
Hieracium groenlandicum — Greenland hawkweed
Hieracium gronovii — hairy hawkweed

Hieracium kalmii — Kalm's hawkweed
Hieracium laevigatum — smooth hawkweed
— Maryland hawkweed
Hieracium paniculatum — panicled hawkweed
— boreal hawkweed
Hieracium robinsonii — Robinson's hawkweed
Hieracium scabrum — rough hawkweed
Hieracium scouleri — Scouler's hawkweed
Hieracium triste — woolly hawkweed
Hieracium umbellatum — umbellate hawkweed
Hieracium venosum — rattlesnake hawkweed
Hymenopappus filifolius — fineleaf woolly-white
Hymenoxys richardsonii — Richardson's bitterweed
— flaxleaf aster
Ionactis stenomeres — Rocky Mountain aster
Iva axillaris — small-flowered marsh-elder
Iva frutescens — bigleaf marsh-elder
Jaumea carnosa — fleshy jaumea
Krigia biflora — two-flower dwarf-dandelion
Krigia virginica — Virginia dwarf-dandelion
Lactuca biennis — tall blue lettuce
Lactuca canadensis — Canada lettuce
Lactuca floridana — woodland lettuce
Lactuca hirsuta — hairy lettuce
Lactuca ludoviciana — western lettuce
Lactuca tatarica — Tartarian lettuce
Lactuca terrae-novae — Newfoundland lettuce
Lasthenia maritima — maritime goldfields
Leucanthemum integrifolium — entire-leaf daisy
Liatris aspera — tall gayfeather
Liatris cylindracea — slender blazingstar
Liatris ligulistylis — strapstyle gayfeather
Liatris punctata — dotted gayfeather
— spherical gayfeather
Liatris spicata — marsh blazingstar
Luina hypoleuca — littleleaf silverback
Lygodesmia juncea — rush skeletonplant
Machaeranthera canescens — hoary tansy-aster
— western aster
— spiny goldenaster
Madia exigua — little tarweed
Madia glomerata — mountain tarweed
Madia gracilis — grassy tarweed
Madia madioides — woodland tarweed
Madia minima — smallhead tarweed
Matricaria discoidea — pineapple-weed chamomile
Megalodonta beckii — Beck's water-marigold
Microseris bigelovii — coast microseris
— northern microseris
— Lindley's silverpuffs
Microseris nutans — nodding silverpuffs
Mikania scandens — climbing hempweed
Nothocalais cuspidata — prairie false-dandelion
Nothocalais troximoides — weevil false-dandelion
Oclemena acuminata — whorled aster
Oclemena nemoralis — bog aster
— Blake's aster
Oligoneuron album — prairie goldenrod
Oligoneuron houghtonii — Houghton's goldenrod
Oligoneuron ohioense — Ohio goldenrod
Oligoneuron riddellii — Riddell's goldenrod
Oligoneuron rigidum — stiff goldenrod
— upland aster
Omalotheca norvegica — Norwegian cudweed
— alpine cudweed
Omalotheca sylvatica — woodland cudweed
Packera aurea — golden ragwort
Packera cana — silvery ragwort
— northwestern groundsel
— dwarf arctic groundsel
— boreal groundsel
Packera indecora — plains ragwort
Packera macounii — Siskiyou Mountains butterweed
— Queen Charlotte groundsel
Packera obovata — roundleaf groundsel
— Ogotoruk Creek groundsel
Packera pauciflora — few-flower ragwort
Packera paupercula — balsam ragwort
Packera plattensis — prairie ragwort
Packera pseudaurea — western golden groundsel
Packera schweinitziana — Robbin's squawweed
Packera streptanthifolia — cleftleaf ragwort
— three-tooth groundsel
Petasites frigidus — arctic butterbur
— arrowleaf sweet colt's-foot
— oppositeleaf false bahia
Polymnia canadensis — whiteflower leafcup
— western rattlesnake-root
Prenanthes alba — white rattlesnake-root
Prenanthes altissima — tall rattlesnake-root
— dwarf rattlesnake-root
— glaucous rattlesnake-root
— arrowleaf rattlesnake-root
— three-leaved rattlesnake-root
Pseudognaphalium canescens — Wright's cudweed
Psilocarphus brevissimus — round woolly-heads
Psilocarphus elatior — tall woolly-heads
Psilocarphus tenellus — slender woolly-heads
Pyrrocoma carthamoides — largeflower goldenweed
Pyrrocoma lanceolata — lance-leaved goldenweed
Pyrrocoma uniflora — plantain goldenweed
Ratibida columnifera — upright prairie coneflower
Ratibida pinnata — greyhead prairie coneflower
Rudbeckia fulgida — orange coneflower
Rudbeckia hirta — black-eyed susan
Rudbeckia laciniata — cut-leaved coneflower
Saussurea americana — American saw-wort
— narrowleaf saw-wort
— clustered saw-wort
— sticky saw-wort
Senecio congestus — marsh ragwort
— cleftleaf groundsel
— Elmer's ragwort
— desert groundsel
Senecio fremontii — Fremont's ragwort
Senecio hydrophiloides — sweet marsh ragwort
Senecio hydrophilus — great swamp ragwort
Senecio integerrimus — entire-leaf ragwort
— blacktip groundsel
— Nuttall's ragwort
— seabeach groundsel
— Mount Sheldon groundsel
Senecio triangularis — arrowleaf groundsel
Sericocarpus rigidus — Curtus' aster
Shinnersoseris rostrata — annual skeletonweed
Silphium laciniatum — compass plant
Silphium perfoliatum — cup-plant
Silphium terebinthinaceum — prairie rosinweed
— Newcombe's groundsel
Solidago altissima — tall goldenrod
Solidago arguta — cutleaf goldenrod
Solidago bicolor — white goldenrod
Solidago caesia — bluestem goldenrod
Solidago calcicola — rock goldenrod
Solidago canadensis — Canada goldenrod
Solidago cutleri — Cutler's goldenrod
Solidago flexicaulis — broad-leaved goldenrod
Solidago gigantea — smooth goldenrod
Solidago hispida — hairy goldenrod
Solidago juncea — early goldenrod
Solidago latissimifolia — Elliott's goldenrod
Solidago macrophylla — largeleaf goldenrod
Solidago missouriensis — Missouri goldenrod
Solidago mollis — ground goldenrod
Solidago multiradiata — alpine goldenrod
Solidago nemoralis — field goldenrod
Solidago patula — roundleaf goldenrod
Solidago puberula — downy goldenrod
Solidago rugosa — roughleaf goldenrod
Solidago sempervirens — seaside goldenrod
Solidago simplex — sticky goldenrod
Solidago speciosa — showy goldenrod
Solidago squarrosa — squarrose goldenrod
Solidago uliginosa — bog goldenrod
Solidago ulmifolia — elmleaf goldenrod
Solidago victorinii — Victorin's goldenrod
Stenotus acaulis — stemless mock goldenweed
Stenotus armerioides — thrift mock goldenweed
— MacLean's goldenweed
— narrowleaf skeletonplant
Stephanomeria runcinata — desert skeletonplant
— thorny wire-lettuce
Symphyotrichum anticostense — Anticosti aster
Symphyotrichum ascendens — western aster
Symphyotrichum boreale — boreal aster
Symphyotrichum campestre — western meadow-aster
Symphyotrichum ciliatum — alkali American-aster
Symphyotrichum ciliolatum — Lindley's aster
Symphyotrichum cordifolium — heartleaf aster
Symphyotrichum dumosum — bushy aster
Symphyotrichum eatonii — Eaton's aster
Symphyotrichum ericoides — white heath aster
Symphyotrichum falcatum — white prairie aster
Symphyotrichum foliaceum — leafy-bracted aster
Symphyotrichum frondosum — alkali aster
Symphyotrichum hendersonii — Henderson's American-aster
Symphyotrichum laeve — smooth blue aster
Symphyotrichum lanceolatum — panicled aster
Symphyotrichum lateriflorum — starved aster
Symphyotrichum laurentianum — St. Lawrence aster
Symphyotrichum novae-angliae — New England aster
Symphyotrichum novi-belgii — longleaf aster
Symphyotrichum ontarionis — Ontario aster
Symphyotrichum oolentangiense — sky blue aster
Symphyotrichum pilosum — white heath aster
Symphyotrichum praealtum — willow aster
Symphyotrichum prenanthoides — crooked-stem aster
Symphyotrichum puniceum — swamp aster
Symphyotrichum racemosum — small white aster
Symphyotrichum robynsianum — Robyns' American-aster
Symphyotrichum sericeum — western silvery aster
Symphyotrichum shortii — Short's aster
Symphyotrichum spathulatum — western mountain aster
Symphyotrichum subspicatum — Douglas' aster
Symphyotrichum subulatum — annual saltmarsh aster
Symphyotrichum tradescantii — Tradescant's aster
Symphyotrichum undulatum — wavyleaf aster
Symphyotrichum urophyllum — white-arrow aster
Symphyotrichum × amethystinum
Symphyotrichum yukonense — Yukon aster
— Lake Huron tansy
— pink dandelion
— wool-bearing dandelion
— alpine dandelion
Taraxacum officinale — common dandelion
— northern dandelion
— dark purple groundsel
— Kjellman's squawweed
— twice-hairy groundsel
— Yukon groundsel
Tetradymia canescens — grey horsebrush
Tetraneuris acaulis — stemless four-nerve daisy
Tetraneuris herbacea — lakeside daisy
— border goldthread
Tonestus lyallii — Lyall's haplopappus
Townsendia condensata — cushion townsend-daisy
— silky townsend-daisy
Townsendia hookeri — Hooker's townsend-daisy
— Parry's townsend-daisy
— false chamomile
Verbesina alternifolia — wingstem
Vernonia fasciculata — fascicled ironweed
Vernonia gigantea — giant ironweed
Vernonia missurica — Missouri ironweed
Xanthium strumarium — rough cocklebur

Aulacomniaceae[]

— acutetip aulacomnium moss

Aulacomnium palustre — aulacomnium moss
Aulacomnium turgidum

Aytoniaceae[]

Asterella gracilis

Reboulia hemisphaerica

Azollaceae[]

Azolla caroliniana — eastern mosquito-fern

Azolla mexicana — Mexican mosquito-fern