Abies balsamea  |
Balsam Fir |
| Acalypha rhomboidea |
Three-Seeded Mercury |
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 |
| Achillea millefolium |
Alaskan Yarrow |
| Achillea sibirica |
Siberian Yarrow |
| Achnatherum hymenoides |
Indian Ricegrass |
| Acorus americanus |
Sweetflag |
| Acorus calamus |
Sweet Flag |
| Actaea pachypoda |
Doll's Eyes |
| Actaea rubra |
Red Baneberry |
| Actaea rubra ssp rubra |
Red Baneberry |
| Adenocaulon bicolor |
American Trailplant |
| Adiantum pedatum |
Maidenhair Fern |
| Adlumia fungosa |
Allegheny Vine |
| Adoxa moschatellina |
Little Musk |
| Aesculus glabra |
Ohio Buckeye |
| Agalinis aspera |
Tall False Foxglove |
| Agalinis auriculata |
Earleaf False Foxglove |
| Agalinis gattingeri |
Roundstem False Foxglove |
| Agalinis paupercula |
Smallflower False Foxglove |
| Agalinis purpurea |
Purple False Foxglove |
| Agalinis skinneriana |
Skinner's False Foxglove |
| Agalinis tenuifolia |
Slenderleaf False Foxglove |
| Agastache foeniculum |
Anise Hyssop |
| Agastache nepetoides |
Yellow Giant Hyssop |
| Agastache scrophulariaefolia |
Purple Giant Hyssop |
| Ageratina altissima |
White Snakeroot |
| Agoseris glauca |
Prairie Dandelion |
| Agrimonia gryposepala |
Common Agrimony |
| Agrimonia rostellata |
Beaked Agrimony |
| Agrimonia striata |
Roadside Agrimony |
| Agrostis canina |
Velvet Bentgrass |
| Agrostis hyemalis |
Winter Bentgrass |
| Agrostis perennans |
Upland Bentgrass |
| Agrostis scabra |
Rough Bentgrass |
| Agrostis stolonifera |
Creeping Bentgrass |
| Alisma gramineum |
Narrowleaf Water Plantain |
| Alisma subcordatum |
American Water Plantain |
| Alisma triviale |
Northern Water Plantain |
| Allium burdickii |
Narrowleaf Wild Leek |
| Allium canadense |
Wild Garlic |
| Allium cernuum |
Nodding Wild Onion |
| Allium stellatum |
Prairie Onion |
| Allium textile |
Textile Onion |
| Allium tricoccum |
Wild Leek |
| Alnus incana |
Speckled Alder |
| Alnus viridis |
Green Alder |
| Alnus viridis ssp crispa |
Mountain Alder |
| Alopecurus aequalis |
Shortawn Foxtail |
| Alopecurus carolinianus |
Carolina Foxtail |
| Amaranthus albus |
Prostrate Pigweed |
| Amaranthus hybridus |
Slim Amaranth |
| Amaranthus powellii |
Powell's Amaranth |
| Amaranthus rudis |
Tall Amaranth |
| Amaranthus spinosus |
Spiny Amaranth |
| Amaranthus tuberculatus |
Tubercled Amaranth |
| Ambrosia acanthicarpa |
Flatspine Burr Ragweed |
| Ambrosia artemisiifolia |
Annual Ragweed |
| Ambrosia bidentata |
Lanceleaf Ragweed |
| Ambrosia psilostachya |
Western Ragweed |
| Ambrosia trifida |
Giant Ragweed |
| Amelanchier alnifolia |
Saskatoon Serviceberry |
| Amelanchier arborea |
Juneberry |
| Amelanchier bartramiana |
Oblongfruit Serviceberry |
| Amelanchier humilis |
Huron Juneberry |
| Amelanchier interior |
Pacific Serviceberry |
| Amelanchier laevis |
Smooth Juneberry |
| Amelanchier sanguinea |
Roundleaf Serviceberry |
| Amelanchier stolonifera |
Running Serviceberry |
| Amerorchis rotundifolia |
Small Round-Leaved Orchis |
| Ammannia coccinea |
Scarlet Ammannia |
| Ammannia robusta |
Grand Redstem |
| Ammophila breviligulata |
American Beachgrass |
| Amorpha canescens |
Lead Plant |
| Amorpha fruticosa |
False Indigo |
| Amorpha nana |
Fragrant False Indigo |
| Amphicarpaea bracteata |
Hog Peanut |
| Amsonia illustris |
Blue Star |
| Anagallis minima |
Chaffweed |
| Anaphalis margaritacea |
Pearly Everlasting |
| Andromeda polifolia |
Bog Rosemary |
| Andropogon gerardii |
Big Bluestem |
| Andropogon hallii |
Sand Bluestem |
| Androsace occidentalis |
Western Rockjasmine |
| Androsace septentrionalis |
Pygmyflower Rockjasmine |
| Androsace septentrionalis ssp puberulenta |
Pygmyflower Rockjasmine |
| Anemone canadensis |
Canada Mayflower |
| Anemone caroliniana |
Thimbleweed |
| Anemone cylindrica |
Thimbleweed |
| Anemone multifida |
Pacific Anemone |
| Anemone quinquefolia |
Wood Anemone |
| Anemone virginiana |
Tall Thimbleweed |
| Angelica atropurpurea |
Angelica |
| Angelica venenosa |
Hairy Angelica |
| Antennaria howellii |
Howell's Pussytoes |
| Antennaria howellii ssp canadensis |
Canadian Pussytoes |
| Antennaria howellii ssp neodioica |
Howell's Pussytoes |
| Antennaria howellii ssp petaloidea |
Small Pussytoes |
| Antennaria microphylla |
Littleleaf Pussytoes |
| Antennaria neglecta |
Pussy Toes |
| Antennaria parlinii |
Parlin's Pussytoes |
| Antennaria parlinii ssp fallax |
Parlin's Pussytoes |
| Antennaria parlinii ssp parlinii |
Parlin's Pussytoes |
| Antennaria parvifolia |
Small Leaf Pussytoes |
| Antennaria plantaginifolia |
Plantain-Leaved Pussytoes |
| Antennaria rosea |
Rosy Pussytoes |
| Antennaria rosea ssp rosea |
Rosy Pussytoes |
| Apios americana |
Groundnut |
| Aplectrum hyemale |
Puttyroot |
| Apocynum androsaemifolium |
Spreading Dogbane |
| Apocynum cannabinum |
Indian Hemp |
| Aquilegia brevistyla |
Smallflower Columbine |
| Aquilegia canadensis |
Wild Columbine |
| Arabis canadensis |
Sicklepod |
| Arabis divaricarpa |
Spreadingpod Rockcress |
| Arabis drummondii |
Drummond's Rockcress |
| Arabis glabra |
Tower Rockcress |
| Arabis hirsuta |
Hairy Rockcress |
| Arabis holboellii |
Holboell's Rockcress |
| Arabis laevigata |
Smooth Rock Cress |
| Arabis lyrata |
Lyrate Rockcress |
| Arabis shortii |
Stellate Rock Cress |
| Aralia hispida |
Bristly Sarsasparilla |
| Aralia nudicaulis |
Wild Sarsaparilla |
| Aralia racemosa |
American Spikenard |
| Aralia racemosa ssp racemosa |
American Spikenard |
| Arceuthobium pusillum |
Eastern Dwarf Mistletoe |
| Arctostaphylos uva-ursi |
Kinnikinnick |
| Arethusa bulbosa |
Dragon's Mouth |
| Argentina anserina |
Silverweed Cinquefoil |
| Arisaema dracontium |
Green Dragon |
| Arisaema triphyllum |
Jack-In-The-Pulpit |
| Arisaema triphyllum ssp pusillum |
Jack In The pulpit |
| Arisaema triphyllum ssp stewardsonii |
Jack In The pulpit |
| Arisaema triphyllum ssp triphyllum |
Jack In The pulpit |
| Aristida basiramea |
Base-Branched Three-Awn |
| Aristida dichotoma |
Churchmouse Threeawn |
| Aristida longispica |
Slimspike Threeawn |
| Aristida oligantha |
Prairie Threeawn |
| Aristida purpurea |
Red Three-Awn |
| Aristida tuberculosa |
Sea-Beach Needle Grass |
| Arnica lonchophylla |
Longleaf Arnica |
| Arnica lonchophylla ssp lonchophylla |
Longleaf Arnica |
| Arnoglossum atriplicifolium |
Pale Indian Plaintain |
| Arnoglossum muehlenbergii |
Great Indian Plaintain |
| Arnoglossum plantagineum |
Tuberous Indian Plantain |
| Artemisia biennis |
Biennial Wormwood |
| Artemisia campestris |
Tall Wormwood |
| Artemisia campestris ssp borealis |
Field Sagewort |
| Artemisia campestris ssp caudata |
Field Sagewort |
| Artemisia cana |
Silver Sagebrush |
| Artemisia cana ssp cana |
Silver Sagebrush |
| Artemisia dracunculus |
Tarragon |
| Artemisia frigida |
Prairie Sagewort |
| Artemisia ludoviciana |
Prairie Sage |
| Artemisia ludoviciana ssp ludoviciana |
White Sagebrush |
| Artemisia serrata |
Leafy Mugwort |
| Artemisia stelleriana |
Oldwoman |
| Artemisia vulgaris |
Common Wormwood |
| Asarum canadense |
Wild Ginger |
| Asclepias amplexicaulis |
Blunt-leaved Milkweed |
| Asclepias exaltata |
Poke Milkweed |
| Asclepias hirtella |
Tall Green Milkweed |
| Asclepias incarnata |
Swamp Milkweed |
| Asclepias incarnata ssp incarnata |
Swamp Milkweed |
| Asclepias lanuginosa |
Sidecluster Milkweed |
| Asclepias ovalifolia |
Oval-Leaved Milkweed |
| Asclepias purpurascens |
Purple Milkweed |
| Asclepias quadrifolia |
Fourleaf Milkweed |
| Asclepias speciosa |
Showy Milkweed |
| Asclepias stenophylla |
Narrow Leaved Milkweed |
| Asclepias sullivantii |
Prairie Milkweed |
| Asclepias syriaca |
Common Milkweed |
| Asclepias tuberosa |
Butterfly Milkweed |
| Asclepias tuberosa ssp interior |
Butterfly Milkweed |
| Asclepias verticillata |
Whorled Milkweed |
| Asclepias viridiflora |
Short Green Milkweed |
| Asplenium platyneuron |
Ebony Spleenwort |
| Asplenium rhizophyllum |
Walking Fern |
| Asplenium trichomanes |
Maidenhair Spleenwort |
| Asplenium trichomanes ssp trichomanes |
Maidenhair Spleenwort |
| Astragalus agrestis |
Purple Milkvetch |
| Astragalus alpinus |
Alpine Milkvetch |
| Astragalus canadensis |
Canadian Milkvetch |
| Astragalus crassicarpus |
Ground Plum |
| Astragalus flexuosus |
Flexile Milkvetch |
| Astragalus laxmannii |
Laxmann's Milkvetch |
| Astragalus lotiflorus |
Lotus Milkvetch |
| Astragalus missouriensis |
Missouri Milkvetch |
| Astragalus neglectus |
Cooper's Milkvetch |
| Astragalus racemosus |
Cream Milkvetch |
| Astragalus tenellus |
Looseflower Milkvetch |
| Athyrium filix-femina |
Lady Fern |
| Athyrium filix-femina ssp angustum |
Subarctic Ladyfern |
| Atriplex patula |
Spear Saltbush |
