Natural Heritage Information Centre
Species List for Vascular Plants
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Odonata
| Scientific Name | Common Name | GRANK | SRANK | COSEWIC | MNR | TRACK | FAMILY |
|---|---|---|---|---|---|---|---|
| Sort | Sort | Sort | Sort | Sort | Sort | Sort | Sort (Family, Taxon.) |
| Abies balsamea | Balsam Fir | G5 | S5 | N | PINACEAE | ||
| Abutilon theophrasti | Velvet-leaf | GNR | SNA | N | MALVACEAE | ||
| Acalypha virginica | Virginia Copperleaf | G5 | S5 | N | EUPHORBIACEAE | ||
| Acanthopanax sieboldianus | GNR | SNA | N | ARALIACEAE | |||
| Acanthospermum hispidum | Hispid Greenstripe | G5 | SNA | N | ASTERACEAE | ||
| Acer campestre | Hedge Maple | GNR | SNA | N | ACERACEAE | ||
| Acer ginnala | Amur Maple | GNR | SNA | N | ACERACEAE | ||
| Acer negundo | Box Elder | G5 | S5 | N | ACERACEAE | ||
| Acer nigrum | Black Maple | G5 | S4? | N | ACERACEAE | ||
| Acer pensylvanicum | Striped Maple | G5 | S5 | N | ACERACEAE | ||
| Acer platanoides | Norway Maple | GNR | SNA | N | ACERACEAE | ||
| Acer pseudoplatanus | Sycamore Maple | GNR | SNA | N | ACERACEAE | ||
| Acer rubrum | Red Maple | G5 | S5 | N | ACERACEAE | ||
| Acer saccharinum | Silver Maple | G5 | S5 | N | ACERACEAE | ||
| Acer saccharum var. saccharum | Sugar Maple | G5T5 | S5 | N | ACERACEAE | ||
| Acer spicatum | Mountain Maple | G5 | S5 | N | ACERACEAE | ||
| Acer x freemanii | Hybrid Maple | GNA | SNR | N | ACERACEAE | ||
| Achillea alpina | Siberian Yarrow | G5? | S1 | Y | ASTERACEAE | ||
| Achillea filipendulina | Fern-leaf Yarrow | GNR | SNA | N | ASTERACEAE | ||
| Achillea millefolium var. borealis | Northern Yarrow | G5T5 | SU | N | ASTERACEAE | ||
| Achillea millefolium var. lanulosa | Seaside Yarrow | G5T5 | S5 | N | ASTERACEAE | ||
| Achillea millefolium var. millefolium | Common Yarrow | G5T5? | SNA | N | ASTERACEAE | ||
| Achillea ptarmica | False Sneezewort | GNR | SNA | N | ASTERACEAE | ||
| Acinos arvensis | Spring Savory | G5 | SNA | N | LAMIACEAE | ||
| Aconitum napellus | Garden Monkshood | GNR | SNA | N | RANUNCULACEAE | ||
| Aconitum variegatum | Manchurian Monkshood | GNR | SNA | N | RANUNCULACEAE | ||
| Aconitum x bicolor | GNA | SNA | N | RANUNCULACEAE | |||
| Acorus americanus | Sweetflag | G5 | S4 | N | ACORACEAE | ||
| Acorus calamus | Sweetflag | G4? | SNA | N | ACORACEAE | ||
| Acroptilon repens | Russian Knapweed | GNR | SNA | N | ASTERACEAE | ||
| Actaea pachypoda | White Baneberry | G5 | S5 | N | RANUNCULACEAE | ||
| Actaea racemosa | Black Cohosh | G4 | S2 | Y | RANUNCULACEAE | ||
| Actaea rubra | Red Baneberry | G5 | S5 | N | RANUNCULACEAE | ||
| Actaea x ludovici | GNA | S1? | N | RANUNCULACEAE | |||
| Adenocaulon bicolor | Trail-plant | G5? | S1 | Y | ASTERACEAE | ||
| Adiantum pedatum | Northern Maidenhair-fern | G5 | S5 | N | PTERIDACEAE | ||
| Adlumia fungosa | Climbing Fumitory | G4 | S4 | N | FUMARIACEAE | ||
| Adonis annua | Pheasant's Eye | GNR | SNA | N | RANUNCULACEAE | ||
| Adoxa moschatellina | Muskroot | G5 | S1 | Y | ADOXACEAE | ||
| Aegopodium podagraria | Goutweed | GNR | SNA | N | APIACEAE | ||
| Aesculus glabra | Ohio Buckeye | G5 | S1 | Y | HIPPOCASTANACEAE | ||
| Aesculus hippocastanum | Horse Chestnut | GNR | SNA | N | HIPPOCASTANACEAE | ||
| Aethusa cynapium | Fool's-parsley | GNR | SNA | N | APIACEAE | ||
| Agalinis gattingeri | Gattinger's Agalinis | G4 | S2 | END | END | Y | SCROPHULARIACEAE |
| Agalinis paupercula | Small-flowered Agalinis | G5 | S4S5 | N | SCROPHULARIACEAE | ||
| Agalinis purpurea | Large Purple Agalinis | G5 | S1 | Y | SCROPHULARIACEAE | ||
| Agalinis skinneriana | Skinner's Agalinis | G3G4 | S1 | END | END | Y | SCROPHULARIACEAE |
| Agalinis tenuifolia | Slender Agalinis | G5 | S4S5 | N | SCROPHULARIACEAE | ||
| Agastache foeniculum | Blue Giant Hyssop | G4G5 | S4 | N | LAMIACEAE | ||
| Agastache nepetoides | Yellow Giant Hyssop | G5 | S4 | N | LAMIACEAE | ||
| Agastache scrophulariifolia | Purple Giant Hyssop | G4 | S1 | Y | LAMIACEAE | ||
| Ageratina altissima var. altissima | White Snakeroot | G5T5 | S5 | N | ASTERACEAE | ||
| Agoseris glauca | Pale False-dandelion | G5 | S4? | N | ASTERACEAE | ||
| Agrimonia eupatoria | European Groovebur | GNR | SNA | N | ROSACEAE | ||
| Agrimonia gryposepala | Tall Hairy Groovebur | G5 | S5 | N | ROSACEAE | ||
| Agrimonia parviflora | Swamp Agrimony | G5 | S4 | N | ROSACEAE | ||
| Agrimonia pubescens | Soft Groovebur | G5 | S4 | N | ROSACEAE | ||
| Agrimonia striata | Woodland Agrimony | G5 | S4? | N | ROSACEAE | ||
| Agropyron cristatum | Crested Wheatgrass | G5 | SNA | N | POACEAE | ||
| Agrostemma githago | Common Corncockle | GNR | SNA | N | CARYOPHYLLACEAE | ||
| Agrostis canina | Brown Bentgrass | G5 | SNR | N | POACEAE | ||
| Agrostis capillaris | Colonial Bentgrass | GNR | SNA | N | POACEAE | ||
| Agrostis gigantea | Black Bentgrass | G4G5 | SNA | N | POACEAE | ||
| Agrostis hyemalis | Winter Bentgrass | G5 | S1 | Y | POACEAE | ||
| Agrostis mertensii | Northern Bentgrass | G5 | S2 | Y | POACEAE | ||
| Agrostis perennans | Perenial Bentgrass | G5 | S5 | N | POACEAE | ||
| Agrostis scabra | Rough Bentgrass | G5 | S5 | N | POACEAE | ||
| Agrostis stolonifera | Spreading Bentgrass | G5 | S5 | N | POACEAE | ||
| Ailanthus altissima | Tree-of-heaven | GNR | SNA | N | SIMAROUBACEAE | ||
| Ajuga genevensis | Geneva Bugle | GNR | SNA | N | LAMIACEAE | ||
| Ajuga reptans | Carpet-bugel | GNR | SNA | N | LAMIACEAE | ||
| Alcea pallida | GNR | SNA | N | MALVACEAE | |||
| Alcea rosea | Hollyhock | GU | SNA | N | MALVACEAE | ||
| Alchemilla filicaulis | Thin-stem Lady's-mantle | G4 | SNA | N | ROSACEAE | ||
| Alchemilla monticola | A Lady's-mantle | GNR | SNA | N | ROSACEAE | ||
| Aletris farinosa | Colicroot | G5 | S2 | THR | THR | Y | LILIACEAE |
| Alisma gramineum | Narrow-leaved Water-plantain | G5 | S4 | N | ALISMATACEAE | ||
| Alisma subcordatum | Southern Water-plantain | G4G5 | S4? | N | ALISMATACEAE | ||
| Alisma triviale | Northern Water-plantain | G5 | S5 | N | ALISMATACEAE | ||
| Alliaria petiolata | Garlic Mustard | GNR | SNA | N | BRASSICACEAE | ||
| Allium canadense | Meadow Onion | G5 | S5 | N | LILIACEAE | ||
| Allium cernuum | Nodding Onion | G5 | S2 | Y | LILIACEAE | ||
| Allium oleraceum | Wild Garlic | GNR | SNA | N | LILIACEAE | ||
| Allium sativum | Garlic | GNR | SNA | N | LILIACEAE | ||
| Allium schoenoprasum var. schoenoprasum | G5T5 | SNA | N | LILIACEAE | |||
| Allium schoenoprasum var. sibiricum | Wild Chives | G5T5 | S4 | N | LILIACEAE | ||
| Allium stellatum | Prairie Onion | G5 | S4 | N | LILIACEAE | ||
| Allium tricoccum | Small White Leek | G5 | S5 | N | LILIACEAE | ||
| Allium tricoccum var. burdickii | Narrow-leaved Wild Leek | G5T4T5 | S1? | Y | LILIACEAE | ||
| Allium vineale | Field Garlic | GNR | SNA | N | LILIACEAE | ||
| Alnus glutinosa | European Alder | GNR | SNA | N | BETULACEAE | ||
| Alnus incana | Speckled Alder | G5 | S5 | N | BETULACEAE | ||
| Alnus viridis | Green Alder | G5 | S5 | N | BETULACEAE | ||
| Alopecurus aequalis | Short-awn Foxtail | G5 | S4S5 | N | POACEAE | ||
| Alopecurus geniculatus | Geniculate Foxtail | GU | SNA | N | POACEAE | ||
| Alopecurus magellanicus | Alpine Foxtail | G5 | S3 | Y | POACEAE | ||
| Alopecurus pratensis | Meadow Foxtail | GNR | SNA | N | POACEAE | ||
| Althaea hirsuta | Hairy Marsh-mallow | GNR | SNA | N | MALVACEAE | ||
| Althaea officinalis | Common Marsh-mallow | GNR | SNA | N | MALVACEAE | ||
| Alyssum alyssoides | Pale Alyssum | GNR | SNA | N | BRASSICACEAE | ||
| Alyssum murale | Yellow-tuft | GNR | SNA | N | BRASSICACEAE | ||
| Amaranthus albus | White Pigweed | GNR | SNA | N | AMARANTHACEAE | ||
| Amaranthus blitoides | Prostrate Amaranth | GNR | SNA | N | AMARANTHACEAE | ||
| Amaranthus blitum | Purple Amaranth | GNR | SNA | N | AMARANTHACEAE | ||
| Amaranthus cruentus | Purple Amaranth | GNR | SNA | N | AMARANTHACEAE | ||
| Amaranthus hybridus | Smooth Amaranth | G5? | SNA | N | AMARANTHACEAE | ||
| Amaranthus palmeri | Palmer's Amaranth | G5 | SNA | N | AMARANTHACEAE | ||
| Amaranthus powellii | Green Amaranth | G5 | SNA | N | AMARANTHACEAE | ||
| Amaranthus retroflexus | Red-root Amaranth | GNR | SNA | N | AMARANTHACEAE | ||
| Amaranthus spinosus | Spiny Amaranth | G5 | SNA | N | AMARANTHACEAE | ||
| Amaranthus tuberculatus | Rough-fruit Amaranth | G4G5 | S4 | N | AMARANTHACEAE | ||
| Ambrosia artemisiifolia | Annual Ragweed | G5 | S5 | N | ASTERACEAE | ||
| Ambrosia psilostachya | Naked-spike Ambrosia | G5 | S4 | N | ASTERACEAE | ||
| Ambrosia trifida | Great Ragweed | G5 | S5 | N | ASTERACEAE | ||
| Amelanchier alnifolia | Saskatoon Service-berry | G5 | S4? | N | ROSACEAE | ||
| Amelanchier amabilis | Beautiful Serviceberry | G4?Q | S2S3 | Y | ROSACEAE | ||
| Amelanchier arborea | Downy Serviceberry | G5 | S5 | N | ROSACEAE | ||
| Amelanchier bartramiana | Bartram Shadbush | G5 | S5 | N | ROSACEAE | ||
| Amelanchier humilis | Running Serviceberry | G5 | S4S5 | N | ROSACEAE | ||
| Amelanchier laevis | Allegheny Service-berry | G4G5Q | S5 | N | ROSACEAE | ||
| Amelanchier sanguinea var. gaspensis | Round-leaved Serviceberry | G5T4? | S4? | N | ROSACEAE | ||
| Amelanchier sanguinea var. sanguinea | G5T5 | S5? | N | ROSACEAE | |||
| Amelanchier stolonifera | Running Serviceberry | G5 | S4? | N | ROSACEAE | ||
| Amelanchier x intermedia | GNA | SU | N | ROSACEAE | |||
| Amelanchier x neglecta | GNA | SU | N | ROSACEAE | |||
| Amelanchier x quinti-martii | GNA | SU | N | ROSACEAE | |||
| Amelanchier x wiegandii | Hybrid | GNA | SU | N | ROSACEAE | ||
| Amerorchis rotundifolia | Round-leaved Orchis | G5 | S4S5 | N | ORCHIDACEAE | ||
| Ammannia robusta | Scarlet Ammannia | G5 | S1 | END | END | Y | LYTHRACEAE |
| Ammophila breviligulata | Marram Grass | G5 | S4 | N | POACEAE | ||
| Amorpha canescens | Downy Indigobush | G5 | S1 | Y | FABACEAE | ||
| Amorpha fruticosa | Indigo Bush | G5 | SNA | N | FABACEAE | ||
| Amphicarpaea bracteata | American Hog-peanut | G5 | S5 | N | FABACEAE | ||
| Anagallis arvensis | Scarlet Pimpernel | GNR | SNA | N | PRIMULACEAE | ||
| Anaphalis margaritacea | Pearly Everlasting | G5 | S5 | N | ASTERACEAE | ||
| Anchusa arvensis | Small Bugloss | GNR | SNA | N | BORAGINACEAE | ||
| Anchusa officinalis | Common Bugloss | GNR | SNA | N | BORAGINACEAE | ||
| Andromeda polifolia var. glaucophylla | Bog Rosemary | G5T5 | S5 | N | ERICACEAE | ||
| Andromeda polifolia var. jamesiana | G5TNR | SU | N | ERICACEAE | |||
| Andromeda polifolia var. polifolia | Bog Rosemary | G5T5 | S4 | N | ERICACEAE | ||
| Andropogon gerardii | Big Bluestem | G5 | S4 | N | POACEAE | ||
| Andropogon virginicus | Broom-sedge | G5 | S4 | N | POACEAE | ||
| Androsace occidentalis | Western Rock-jasmine | G5 | SH | Y | PRIMULACEAE | ||
| Androsace septentrionalis | Pygmy-flower Rock-jasmine | G5 | S4? | N | PRIMULACEAE | ||
| Anemone blanda | GNR | SNA | N | RANUNCULACEAE | |||
| Anemone canadensis | Canada Anemone | G5 | S5 | N | RANUNCULACEAE | ||
| Anemone cylindrica | Long-fruited Anemone | G5 | S4 | N | RANUNCULACEAE | ||
| Anemone multifida | Early Anemone | G5 | S5 | N | RANUNCULACEAE | ||
| Anemone parviflora | Small-flowered Anemone | G5 | S5 | Y | RANUNCULACEAE | ||
| Anemone patens | Prairie Crocus | G5 | S1 | Y | RANUNCULACEAE | ||
| Anemone quinquefolia | Wood Anemone | G5 | S5 | N | RANUNCULACEAE | ||
| Anemone richardsonii | Yellow Anemone | G5 | SH | Y | RANUNCULACEAE | ||
| Anemone virginiana | Virginia Anemone | G5 | S5 | N | RANUNCULACEAE | ||
| Anethum graveolens | Dill | GNR | SNA | N | APIACEAE | ||
| Angelica atropurpurea | Great Angelica | G5 | S5 | N | APIACEAE | ||
| Angelica lucida | Angelica | G5 | SU | N | APIACEAE | ||
| Angelica sylvestris | G5? | SNA | N | APIACEAE | |||
| Angelica venenosa | Hairy Angelica | G5 | SH | Y | APIACEAE | ||
| Anoda cristata | Crested Anoda | G5 | SNA | N | MALVACEAE | ||
| Antennaria howellii ssp. canadensis | Pussy-toes | G5T5? | SU | N | ASTERACEAE | ||
| Antennaria howellii ssp. howellii | Pussy-toes | G5T5 | SU | N | ASTERACEAE | ||
| Antennaria howellii ssp. neodioica | Pussy-toes | G5T5 | SU | N | ASTERACEAE | ||
| Antennaria howellii ssp. petaloidea | Pussy-toes | G5T4T5 | SU | N | ASTERACEAE | ||
| Antennaria microphylla | Small-leaved Pussytoes | G4G5 | SH | Y | ASTERACEAE | ||
| Antennaria neglecta | Field Pussytoes | G5 | S5 | N | ASTERACEAE | ||
| Antennaria oxyphylla | Pussy-toes | GNR | S1? | Y | ASTERACEAE | ||
| Antennaria parlinii ssp. fallax | Pussy-toes | G5?T4T5 | SU | N | ASTERACEAE | ||
| Antennaria parlinii ssp. parlinii | Pussy-toes | G5?T5? | SU | N | ASTERACEAE | ||
| Antennaria parvifolia | Small-leaved Pussytoes | G5 | S1 | Y | ASTERACEAE | ||
| Antennaria pulcherrima | Handsome Pussy-toes | G5 | S5 | N | ASTERACEAE | ||
| Antennaria rosea | Rosy Pussytoes | G5 | S1S2 | Y | ASTERACEAE | ||
| Antennaria rosea ssp. confinis | Rosy Pussy-toes | GNR | SH | Y | ASTERACEAE | ||
| Anthemis arvensis | Corn Camomile | GNR | SNA | N | ASTERACEAE | ||
| Anthemis cotula | Mayweed | G5 | SNA | N | ASTERACEAE | ||
| Anthemis tinctoria | Golden Camomile | GNR | SNA | N | ASTERACEAE | ||
| Anthoxanthum arcticum | Arctic Sweet Grass | G4G5 | S2 | Y | POACEAE | ||
| Anthoxanthum monticola | Alpine Sweet Grass | G5 | S1 | Y | POACEAE | ||
| Anthoxanthum odoratum | Sweet Vernal Grass | GNR | SNA | N | POACEAE | ||
| Anthriscus cerefolium | Common Chervil | GNR | SNA | N | APIACEAE | ||
| Anthriscus sylvestris | Wild Chervil | GNR | SNA | N | APIACEAE | ||
| Anthyllis vulneraria | Kidney-vetch | GNR | SNA | N | FABACEAE | ||
| Antirrhinum majus | Garden Snapdragon | GNR | SNA | N | SCROPHULARIACEAE | ||
| Apera interrupta | Dense Silky Bentgrass | GNR | SNA | N | POACEAE | ||
| Apera spica-venti | Silky Bentgrass | GNR | SNA | N | POACEAE | ||
| Apios americana | American Groundnut | G5 | S5 | N | FABACEAE | ||
| Aplectrum hyemale | Puttyroot | G5 | S2 | Y | ORCHIDACEAE | ||
| Apocynum androsaemifolium | Spreading Dogbane | G5 | S5 | N | APOCYNACEAE | ||
| Apocynum cannabinum | Clasping-leaf Dogbane | GNR | S5 | N | APOCYNACEAE | ||
| Apocynum sibiricum | Clasping-leaved Dogbane | G5? | S4? | N | APOCYNACEAE | ||
| Apocynum x floribundum | Hybrid | GNA | SU | N | APOCYNACEAE | ||
| Aquilegia brevistyla | Small-flower Columbine | G5 | S4 | N | RANUNCULACEAE | ||
| Aquilegia canadensis | Wild Columbine | G5 | S5 | N | RANUNCULACEAE | ||
| Aquilegia vulgaris | European Columbine | GNR | SNA | N | RANUNCULACEAE | ||
| Arabidopsis thaliana | Wall-cress | GNR | SNA | N | BRASSICACEAE | ||
| Arabis alpina | Alpine Rockcress | G5 | S1 | Y | BRASSICACEAE | ||
| Arabis arenicola var. arenicola | Rock-cress | G4G5T4Q | S1 | Y | BRASSICACEAE | ||
| Arabis arenicola var. pubescens | Rock-cress | G4G5T3?Q | S2 | Y | BRASSICACEAE | ||
| Arabis canadensis | Sicklepod | G5 | S4 | N | BRASSICACEAE | ||
| Arabis caucasica | G5? | SNA | N | BRASSICACEAE | |||
| Arabis divaricarpa | Limestone Rockcress | G5 | S5 | N | BRASSICACEAE | ||
| Arabis drummondii | Drummond Rockcress | G5 | S4 | N | BRASSICACEAE | ||
| Arabis glabra | Tower-mustard | G5 | S5 | N | BRASSICACEAE | ||
| Arabis hirsuta var. adpressipilis | Hairy Rock-cress | G5T4Q | S1 | Y | BRASSICACEAE | ||
| Arabis hirsuta var. pycnocarpa | Hairy Rock-cress | G5T5 | S5 | N | BRASSICACEAE | ||
| Arabis holboellii var. retrofracta | A Holboell Rock-cress | G5T5 | S4? | N | BRASSICACEAE | ||
| Arabis holboellii var. secunda | G5T5 | SU | Y | BRASSICACEAE | |||
| Arabis laevigata | Smooth Rock-cress | G5 | S5 | N | BRASSICACEAE | ||
| Arabis lyrata | Lyre-leaf Rockcress | G5 | S4 | N | BRASSICACEAE | ||
| Arabis lyrata var. kamchatica | Lyre-leaf Rockcress | G5T5? | SU | N | BRASSICACEAE | ||
| Aralia elata | Japanese Angelica Tree | GNR | SNA | N | ARALIACEAE | ||
| Aralia hispida | Bristly Sarsaparilla | G5 | S5 | N | ARALIACEAE | ||
| Aralia nudicaulis | Wild Sarsaparilla | G5 | S5 | N | ARALIACEAE | ||
| Aralia racemosa | American Spikenard | G4G5 | S5 | N | ARALIACEAE | ||
| Aralia spinosa | Hercules Club | G5 | SU | N | ARALIACEAE | ||
| Arceuthobium americanum | American Dwarf Mistletoe | G5 | SH | Y | VISCACEAE | ||
| Arceuthobium pusillum | Dwarf Mistletoe | G5 | S5 | N | VISCACEAE | ||
| Arctagrostis latifolia | Polar Grass | G5 | S3? | Y | POACEAE | ||
| Arctanthemum arcticum | Arctic Daisy | G5 | S3? | Y | ASTERACEAE | ||
| Arctium lappa | Greater Burdock | GNR | SNA | N | ASTERACEAE | ||
| Arctium minus ssp. minus | Common Burdock | GNRTNR | SNA | N | ASTERACEAE | ||
| Arctium minus ssp. nemorosum | GNRTNR | SNA | N | ASTERACEAE | |||
| Arctium pubens | GNR | SNA | N | ASTERACEAE | |||
| Arctium tomentosum | Woolly Burdock | GNR | SNA | N | ASTERACEAE | ||
| Arctium x nothum | GNA | SNA | N | ASTERACEAE | |||
| Arctophila fulva | Pendent Grass | G5 | S3? | Y | POACEAE | ||
| Arctostaphylos alpina | Alpine Bearberry | G5 | S4? | N | ERICACEAE | ||
| Arctostaphylos rubra | Red Manzanita | G5 | S5 | N | ERICACEAE | ||
| Arctostaphylos uva-ursi | Bearberry | G5 | S5 | N | ERICACEAE | ||
| Arenaria humifusa | Creeping Sandwort | G4 | S2S3 | Y | CARYOPHYLLACEAE | ||
| Arenaria serpyllifolia | Thyme-leaf Sandwort | GNR | SNA | N | CARYOPHYLLACEAE | ||
| Arethusa bulbosa | Swamp-pink | G4 | S4 | N | ORCHIDACEAE | ||
| Argemone mexicana | Mexican Prickly-poppy | G5 | SNA | N | PAPAVERACEAE | ||
| Argentina anserina | Silverweed | G5 | S5 | N | ROSACEAE | ||
| Arisaema dracontium | Green Dragon | G5 | S3 | SC | SC | Y | ARACEAE |
| Arisaema triphyllum | Jack-in-the-pulpit | G5 | S5 | N | ARACEAE | ||
| Aristida basiramea | Forked Three-awned Grass | G5 | S2 | END | END | Y | POACEAE |
| Aristida dichotoma | Churchmouse Three-awned Grass | G5 | S1 | Y | POACEAE | ||
| Aristida longespica var. geniculata | Geniculate Three-awned Grass | G5T5? | S2 | Y | POACEAE | ||
| Aristida longespica var. longespica | Slim-spiked Three-awned Grass | G5T5? | S2 | Y | POACEAE | ||
| Aristida oligantha | Prairie Three-awn Grass | G5 | SNA | N | POACEAE | ||
| Aristida purpurascens | Arrowfeather Three-awned Grass | G5 | S1 | Y | POACEAE | ||
| Aristolochia clematitis | Birthwort | GNR | SNA | N | ARISTOLOCHIACEAE | ||
| Aristolochia macrophylla | Pipevine | G5 | SNA | N | ARISTOLOCHIACEAE | ||
| Armeria maritima | Labrador Sea Thrift | G5 | S3? | Y | PLUMBAGINACEAE | ||
| Armoracia rusticana | Horseradish | GNR | SNA | N | BRASSICACEAE | ||
| Arnica angustifolia | Narrow-leaved Arnica | G5 | S5 | N | ASTERACEAE | ||
| Arnica chamissonis | Leafy Arnica | G5 | S5 | N | ASTERACEAE | ||
| Arnica cordifolia | Heart-leaved Arnica | G5 | S1 | Y | ASTERACEAE | ||
| Arnica lonchophylla | Long-leaved Arnica | G4 | S1 | Y | ASTERACEAE | ||
| Arnoglossum plantagineum | Tuberous Indian-plantain | G4G5 | S3 | SC | SC | Y | ASTERACEAE |
| Arrhenatherum elatius | Tall Oatgrass | GNR | SNA | N | POACEAE | ||
| Artemisia abrotanum | Southern Wormwood | GNR | SNA | N | ASTERACEAE | ||
| Artemisia absinthium | Common Wormwood | GNR | SNA | N | ASTERACEAE | ||
| Artemisia annua | Annual Wormwood | GNR | SNA | N | ASTERACEAE | ||
| Artemisia biennis | Biennial Wormwood | G5 | SNA | N | ASTERACEAE | ||
| Artemisia campestris ssp. borealis | Boreal Wormwood | G5T5 | S4? | N | ASTERACEAE | ||
| Artemisia campestris ssp. caudata | Beach Wormwood | G5T5 | S4S5 | N | ASTERACEAE | ||
| Artemisia dracunculus | Dragon Wormwood | G5 | S1 | Y | ASTERACEAE | ||
| Artemisia frigida | Prairie Sagebrush | G5 | S3 | Y | ASTERACEAE | ||
| Artemisia ludoviciana | White Sagebrush | G5 | S4? | N | ASTERACEAE | ||
| Artemisia pontica | Roman Wormwood | GNR | SNA | N | ASTERACEAE | ||
| Artemisia stelleriana | Hoary Sagebrush | G4? | SNA | N | ASTERACEAE | ||
| Artemisia tilesii | Tilesius Wormwood | G5 | S2 | Y | ASTERACEAE | ||
| Artemisia vulgaris | Common Wormwood | GU | SNA | N | ASTERACEAE | ||
| Aruncus dioicus | Common Goatsbeard | G5 | SNA | N | ROSACEAE | ||
| Asarum canadense | Canada Wild-ginger | G5 | S5 | N | ARISTOLOCHIACEAE | ||
| Asclepias exaltata | Poke Milkweed | G5 | S4 | N | ASCLEPIADACEAE | ||
| Asclepias hirtella | Green Milkweed | G5 | S1 | Y | ASCLEPIADACEAE | ||
| Asclepias incarnata | Swamp Milkweed | G5 | S5 | N | ASCLEPIADACEAE | ||
| Asclepias ovalifolia | Dwarf Milkweed | G5? | S2 | Y | ASCLEPIADACEAE | ||
| Asclepias purpurascens | Purple Milkweed | G5? | S2 | Y | ASCLEPIADACEAE | ||
| Asclepias quadrifolia | Whorled Milkweed | G5 | S1 | Y | ASCLEPIADACEAE | ||
| Asclepias sullivantii | Prairie Milkweed | G5 | S3 | Y | ASCLEPIADACEAE | ||
| Asclepias syriaca | Kansas Milkweed | G5 | S5 | N | ASCLEPIADACEAE | ||
| Asclepias tuberosa | Butterfly Milkweed | G5? | S4 | N | ASCLEPIADACEAE | ||
| Asclepias variegata | White Milkweed | G5 | SX | Y | ASCLEPIADACEAE | ||
| Asclepias verticillata | Whorled Milkweed | G5 | S4 | N | ASCLEPIADACEAE | ||
| Asclepias viridiflora | Green Cornet Milkweed | G5 | S2 | Y | ASCLEPIADACEAE | ||
| Asimina triloba | Pawpaw | G5 | S3 | Y | ANNONACEAE | ||
| Asparagus officinalis | Garden Asparagus-fern | G5? | SNA | N | LILIACEAE | ||
| Asperugo procumbens | German Madwort | GNR | SNA | N | BORAGINACEAE | ||
| Asperula arvensis | Blue Woodruff | G5 | SNA | N | RUBIACEAE | ||
| Asplenium platyneuron | Ebony Spleenwort | G5 | S4 | N | ASPLENIACEAE | ||
| Asplenium rhizophyllum | Walking-fern Spleenwort | G5 | S4 | N | ASPLENIACEAE | ||
| Asplenium ruta-muraria | Wallrue Spleenwort | G5 | S2 | Y | ASPLENIACEAE | ||
| Asplenium scolopendrium var. americanum | American Hart's-tongue Fern | G4T3 | S3 | SC | SC | Y | ASPLENIACEAE |
| Asplenium trichomanes | Maidenhair Spleenwort | G5 | S5 | N | ASPLENIACEAE | ||
| Asplenium trichomanes-ramosum | Green Spleenwort | G4 | S4 | N | ASPLENIACEAE | ||
| Aster alpinus | Alpine Aster | G5 | S1 | Y | ASTERACEAE | ||
| Astragalus adsurgens | Laxmann's Milk-vetch | G5 | SH | Y | FABACEAE | ||
| Astragalus agrestis | Meadow Milk-vetch | G5 | SH | Y | FABACEAE | ||
| Astragalus alpinus | Alpine Milkvetch | G5 | S5 | N | FABACEAE | ||
| Astragalus americanus | American Milk-vetch | G5 | SH | Y | FABACEAE | ||
| Astragalus australis | Indian Milk-vetch | G5 | S1 | Y | FABACEAE | ||
| Astragalus canadensis | Canadian Milkvetch | G5 | S4 | N | FABACEAE | ||
| Astragalus cicer | A Milk-vetch | G5 | SNA | N | FABACEAE | ||
| Astragalus eucosmus | Pretty Milk-vetch | G5 | S4S5 | N | FABACEAE | ||
| Astragalus glycyphyllos | A Milk-vetch | G5 | SNA | N | FABACEAE | ||
| Astragalus neglectus | Cooper's Milk-vetch | G4 | S3 | Y | FABACEAE | ||
| Astragalus tenellus | Loose-flowered Milk-vetch | G5 | S1 | Y | FABACEAE | ||
| Athyrium filix-femina ssp. angustum | Lady Fern | G5T5 | S5 | N | DRYOPTERIDACEAE | ||
| Athyrium filix-femina var. cyclosorum | Western Lady Fern | G5T5 | SH | Y | DRYOPTERIDACEAE | ||
| Atriplex dioica | Thick-leaved Orache | G4? | S2S3 | Y | CHENOPODIACEAE | ||
| Atriplex glabriuscula | Glabrous Orache | G4 | S2? | Y | CHENOPODIACEAE | ||
| Atriplex hortensis | Garden Orach | GNR | SNA | N | CHENOPODIACEAE | ||
| Atriplex micrantha | Two-scale Orache | G5 | SNA | N | CHENOPODIACEAE | ||
| Atriplex oblongifolia | Oblong-leaf Orache | GNR | SNA | N | CHENOPODIACEAE | ||
| Atriplex patula | Halberd-leaf Saltbush | G5 | S5 | N | CHENOPODIACEAE | ||
| Atriplex prostrata | Creeping Saltbush | G5 | S5 | N | CHENOPODIACEAE | ||
| Atriplex rosea | Tumbling Orach | GNR | SNA | N | CHENOPODIACEAE | ||
| Aureolaria flava | Yellow False Foxglove | G5 | S2? | Y | SCROPHULARIACEAE | ||
| Aureolaria pedicularia | Fern-leaved Yellow False Foxglove | G5 | S2? | Y | SCROPHULARIACEAE | ||
| Aureolaria virginica | Downy Yellow False Foxglove | G5 | S1 | Y | SCROPHULARIACEAE | ||
| Aurinia saxatilis | Basket-of-gold | GNR | SNA | N | BRASSICACEAE | ||
| Avena fatua | Wild Oat | GNR | SNA | N | POACEAE | ||
| Avena sativa | Cultivated Oat | GNR | SNA | N | POACEAE | ||
| Avena sterilis | Animated Oats | GNR | SNA | N | POACEAE | ||
| Axyris amaranthoides | Russian-pigweed | GNR | SNA | N | CHENOPODIACEAE | ||
| Azolla caroliniana | Eastern Mosquito-fern | G5 | S1? | Y | SALVINIACEAE | ||