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Families: 141
Genera: 529
Species: 1242
Total Taxa (details): 1295

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Acalypha gracilens A. Gray - Slender Three-Seed-Mercury
Acalypha rhomboidea Raf. - Common Three-Seed-Mercury
Acalypha virginica L. - Virginia Three-Seed-Mercury
Acer nigrum F. Michx. - Black Maple
Acer rubrum L. - Red Maple
Acer saccharinum L. - Silver Maple
Achillea millefolium L. - common yarrow
Acorus calamus L. - Single-Vein Sweetflag
Actaea pachypoda Elliott - White Baneberry
Adiantum pedatum L. - Northern Maidenhair
Aegilops cylindrica Host - Jointed Goat Grass
Aesculus glabra Willd. - Ohio Buckeye
Agalinis paupercula (A. Gray) Britton - Small-Flower False Foxglove
Agalinis paupercula var. borealis Pennell - Small-Flower False Foxglove
Agalinis paupercula var. paupercula - Small-Flower False Foxglove
Agalinis purpurea (L.) Pennell - Purple False Foxglove
Agalinis tenuifolia (Vahl) Raf. - Slender-Leaf False Foxglove
Agalinis tenuifolia var. tenuifolia - Slender-Leaf False Foxglove
Agastache nepetoides (L.) Kuntze - Yellow Giant-Hyssop
Agrimonia gryposepala Wallr. - Tall Hairy Grooveburr
Agrimonia pubescens Wallr. - Soft Grooveburr
Agrimonia rostellata Wallr. - Beaked Grooveburr
Agrostis scabra Willd. - Thermal Bent
Agrostis stolonifera L. - Spreading Bent
Aletris farinosa L. - White Colicroot
Alisma subcordatum Raf. - American Water-Plantain
Alisma triviale Pursh - Northern Water-Plantain
Allium canadense L. - Meadow Garlic
Allium cernuum Roth - Nodding Onion
Allium vineale L. - Crow Garlic
Alnus incana (L.) Moench - Speckled Alder
Alopecurus aequalis Sobol. - Short-Awn Meadow-Foxtail
Alopecurus aequalis var. aequalis - Short-Awn Meadow-Foxtail
Alopecurus carolinianus Walter - Tufted Meadow-Foxtail
Amaranthus albus L. - Tumbleweed
Amaranthus hybridus L. - Smooth Amaranth
Ambrosia trifida L. - Great Ragweed
Amelanchier arborea (Michx. f.) Fernald - Intermediate Service-Berry
Amelanchier interior E. L. Nielsen - Inland Service-Berry
Amelanchier laevis Wiegand - Allegheny Service-Berry
Amelanchier sanguinea (Pursh) DC. - Round-Leaf Service-Berry
Amelanchier spicata (Lam.) K. Koch - Running Service-Berry
Amorpha fruticosa L. - False Indigo-Bush
Andromeda polifolia L. - Bog-Rosemary
Androsace occidentalis Pursh - Western Rock-Jasmine
Anemone acutiloba (DC.) G. Lawson - Sharp-Lobe Hepatica
Anemone americana (DC.) H. Hara - Round-Lobe Hepatica
Anemone canadensis L. - Canadian False Thimbleweed
Anemone cylindrica A. Gray - Long-Head Thimbleweed
Anemone virginiana L. - Tall Thimbleweed
Antennaria neglecta Greene - Field Pussytoes
Antennaria parlinii Fernald - Parlin's Pussytoes
Anthemis cotula L. - Stinking Chamomile
Apocynum androsaemifolium L. - Spreading Dogbane
Aquilegia canadensis L. - Red Columbine
Arabis pycnocarpa M. Hopkins - Hairy Eared Rockcress
Aralia hispida Vent. - Bristly Sarsaparilla
Aralia nudicaulis L. - Wild Sarsaparilla
Aralia racemosa L. - American Spikenard
Arctium minus (Hill) Bernh. - Lesser Burrdock
Arenaria serpyllifolia L. - Thyme-Leaf Sandwort
Arisaema triphyllum (L.) Schott - Jack-in-the-Pulpit
Aristida oligantha Michx. - Prairie Three-Awn
Aristida purpurascens Poir. - Arrow-Feather Three-Awn
Aristida tuberculosa Nutt. - Seaside Three-Awn
Arnoglossum plantagineum Raf. - Groove-Stem Indian-Plantain
Artemisia biennis Willd. - Biennial Wormwood
Artemisia campestris L. - Pacific Wormwood
Artemisia ludoviciana Nutt. - White Sagebrush
Asarum canadense L. - Canadian Wild Ginger
Asclepias amplexicaulis Sm. - Clasping Milkweed
Asclepias incarnata L. - Swamp Milkweed
Asclepias purpurascens L. - Purple Milkweed
Asclepias syriaca L. - Common Milkweed
Asclepias tuberosa L. - Butterfly Milkweed
Asclepias verticillata L. - Whorled Milkweed
Asclepias viridiflora Raf. - Green Comet Milkweed
Astragalus canadensis L. - Canadian Milk-Vetch
Atriplex littoralis L. - Grass-Leaf Orache
Atriplex patula L. - Halberd-Leaf Orache
Aureolaria flava (L.) Farw. - Smooth Yellow False Foxglove
Aureolaria flava var. flava - Smooth Yellow False Foxglove
Aureolaria flava var. macrantha Pennell - Smooth Yellow False Foxglove
Aureolaria pedicularia (L.) Raf. - Fern-Leaf Yellow False Foxglove
Aureolaria pedicularia var. pedicularia - Fern-Leaf Yellow False Foxglove
Aureolaria virginica (L.) Pennell - Downy Yellow False Foxglove
Azolla cristata Kaulf. - Crested Mosquito Fern
Baptisia bracteata Elliott - Long-Bract Wild Indigo
Baptisia lactea (Raf.) Thieret - Largeleaf Wild Indigo
Baptisia lactea var. lactea - Largeleaf Wild Indigo
Baptisia × deamii Larisey - Hybrid Wild Indigo
Barbarea vulgaris W. T. Aiton - Garden Yellow-Rocket
Berberis canadensis Mill. - American Barberry
Berteroa incana (L.) DC. - Hoary False Madwort
Besseya bullii (Eaton) Rydb. - Bull's Coraldrops
Betula nigra L. - River Birch
Betula pendula Roth - European Weeping Birch
Betula pumila L. - Bog Birch
Bidens bipinnata L. - Spanish-Needles
Bidens cernua L. - Nodding Burr-Marigold
Bidens connata Muhl. ex Willd. - Purplestem Beggarticks
Bidens frondosa L. - Devil's-Pitchfork
Bidens tripartita L. - Three-Lobe Beggarticks
Bidens vulgata Greene - Tall Beggarticks
Blephilia ciliata (L.) Benth. - Downy Pagoda-Plant
Boehmeria cylindrica (L.) Sw. - Small-Spike False Nettle
Brassica juncea (L.) Czern. - Chinese Mustard
Bromus inermis Leyss. - Smooth Brome
Bromus kalmii A. Gray - Kalm's Brome
Bromus nottowayanus Fernald - Nottoway Valley Brome
Bromus pubescens Muhl. ex Willd. - Hairy Woodland Brome
Bromus tectorum L. - Cheat Grass
Calamagrostis stricta (Timm) Koel. - Slim-Stem Reed Grass
Callitriche heterophylla Pursh - Greater Water-Starwort
Caltha palustris L. - Yellow Marsh-Marigold
Calystegia silvatica (Kit.) Griseb. - Short-Stalk False Bindweed
Campanula aparinoides Pursh - Marsh Bellflower
Campanula rotundifolia L. - Bluebell-of-Scotland
Cardamine parviflora L. - Sand Bittercress
Carex alata Torr. - Broad-Wing Sedge
Carex albursina E. Sheld. - White Bear Sedge
Carex amphibola Steud. - Eastern Narrow-Leaf Sedge
Carex atlantica L. H. Bailey - Prickly Bog Sedge
Carex aurea Nutt. - Golden-Fruit Sedge
Carex bicknellii Britton - Bicknell's Sedge
Carex blanda Dewey - Eastern Woodland Sedge
Carex buxbaumii Wahlenb. - Brown Bog Sedge
Carex communis L. H. Bailey - Fibrous-Root Sedge
Carex comosa Boott - Bearded Sedge
Carex crawei Dewey - Crawe's Sedge
Carex diandra Schrank - Lesser Tussock Sedge
Carex disperma Dewey - Soft-Leaf Sedge
Carex frankii Kunth - Frank's Sedge
Carex granularis Muhl. ex Willd. - Limestone-Meadow Sedge
Carex grayi J. Carey - Gray's Sedge
Carex grisea Wahlenb. - Inflated Narrow-Leaf Sedge
Carex haydenii Dewey - Cloud Sedge
Carex hirsutella Mack. - Fuzzy-Wuzzy Sedge
Carex hirtifolia Mack. - Pubescent Sedge
Carex inops L. H. Bailey - Long-Stolon Sedge
Carex jamesii Schwein. - James' Sedge
Carex lacustris Willd. - Lakebank Sedge
Carex lasiocarpa Ehrh. - Woolly-Fruit Sedge
Carex leavenworthii Dewey - Leavenworth's Sedge
Carex leptalea Wahlenb. - Bristly-Stalk Sedge
Carex leptalea subsp. leptalea - Bristlystalked Sedge
Carex longii Mack. - Long's Sedge
Carex meadii Dewey - Mead's Sedge
Carex molesta Mack. ex Bright - Troublesome Sedge
Carex normalis Mack. - Greater Straw Sedge
Carex oligosperma Michx. - Few-Seed Sedge
Carex pensylvanica Lam. - Pennsylvania Sedge
Carex radiata (Wahlenb.) Small - Eastern Star Sedge
Carex sartwellii Dewey - Sartwell's Sedge
Carex scoparia Schkuhr ex Willd. - Pointed Broom Sedge
Carex shortiana Dewey - Short's Sedge
Carex siccata Dewey - Dry-Spike Sedge
Carex squarrosa L. - Squarrose Sedge
Carex sterilis Willd. - Dioecious Sedge
Carex stipata Muhl. ex Willd. - Stalk-Grain Sedge
Carex stipata var. stipata - Stalk-Grain Sedge
Carex straminea Willd. - Eastern Straw Sedge
Carex stricta Lam. - Uptight Sedge
Carex suberecta (Olney) Britton - Prairie Straw Sedge
Carex tenera Dewey - Quill Sedge
Carex tribuloides Wahlenb. - Blunt Broom Sedge
Carex utriculata Boott - Northwest Territory Sedge
Carex vesicaria L. - Lesser Bladder Sedge
Carex viridula Michx. - Little Green Sedge
Carex viridula var. viridula - Little Green Sedge
Carex vulpinoidea Michx. - Common Fox Sedge
Carpinus caroliniana Walter - American Hornbeam
Carya ovata (Mill.) K. Koch - Shag-Bark Hickory
Carya tomentosa (Poir.) Nutt. - Mockernut Hickory
Castilleja coccinea (L.) Spreng. - Scarlet Indian-Paintbrush
Ceanothus americanus L. - New Jersey-Tea
Celastrus scandens L. - American Bittersweet
Celtis occidentalis L. - Common Hackberry
Cephalanthus occidentalis L. - Common Buttonbush
Cerastium fontanum Baumg. - Common Mouse-Ear Chickweed
Cerastium nutans Raf. - Nodding Mouse-Ear Chickweed
Cerastium nutans var. nutans - Nodding Mouse-Ear Chickweed
Chelone glabra L. - White Turtlehead
Chenopodium album L. - Lamb's-Quarters
Chenopodium berlandieri Moq. - Pit-Seed Goosefoot
Chenopodium standleyanum Aellen - Standley's Goosefoot
Cicuta bulbifera L. - Bulblet-Bearing Water-Hemlock
Cicuta maculata L. - Spotted Water-Hemlock
Cinna arundinacea L. - Sweet Wood-Reed
Circaea canadensis (L.) Hill - Broad-Leaf Enchanter's-Nightshade
Cirsium arvense (L.) Scop. - Canadian Thistle
Cirsium muticum Michx. - Swamp Thistle
Cirsium pumilum Spreng. - Pasture Thistle
Claytonia virginica L. - Virginia Springbeauty
Coleataenia longifolia (Torr.) Soreng - Long-Leaf Cut-Throat Grass
Coleataenia longifolia subsp. longifolia - Long-Leaf Cut-Throat Grass
Coleataenia rigidula subsp. rigidula - Red-Top Cut-Throat Grass
Collinsia verna Nutt. - Spring Blue-Eyed Mary
Comarum palustre L. - Purple Marshlocks
Commelina erecta L. - White-Mouth Dayflower
Conium maculatum L. - Poison-Hemlock
Convolvulus arvensis L. - Field Bindweed
Coptis trifolia (L.) Salisb. - Three-Leaf Goldthread
Coreopsis lanceolata L. - Lance-Leaf Tickseed
Coreopsis palmata Nutt. - Stiff Tickseed
Coreopsis tripteris L. - Tall Tickseed
Cornus alternifolia L. f. - Alternate-Leaf Dogwood
Cornus drummondii C. A. Mey. - Rough-Leaf Dogwood
Cornus florida L. - Flowering Dogwood
Cornus obliqua Raf. - Pale Dogwood
Cornus racemosa Lam. - Gray Dogwood
Corylus americana Walter - American Hazelnut
Crataegus coccinea L. - Scarlet Hawthorn
Crataegus crus-galli L. - Cock-Spur Hawthorn
Crocanthemum canadense (L.) Britton - Long-Branch Frostweed
Croton glandulosus L. - Vente-Conmigo
Cuscuta cephalanthi Engelm. - Buttonbush Dodder
Cuscuta coryli Engelm. - Hazel Dodder
Cuscuta pentagona Engelm. - Bush-Clover Dodder
Cuscuta polygonorum Engelm. - Smartweed Dodder
Cyperus bipartitus Torr. - Shining Flat Sedge
Cyperus dentatus Torr. - Toothed Flat Sedge
Cyperus diandrus Torr. - Umbrella Flat Sedge
Cyperus erythrorhizos Muhl. - Red-Root Flat Sedge
Cyperus ferax Rich. - Rusty Flat Sedge
Cyperus lupulinus (Spreng.) Marcks - Great Plains Flat Sedge
Cyperus lupulinus subsp. lupulinus - Great Plains Flat Sedge
Cyperus schweinitzii Torr. - Sand Flat Sedge
Cyperus squarrosus L. - Awned Flat Sedge
Cyperus strigosus L. - Straw-Color Flat Sedge
Cyperus × mesochorus Geise - Hybrid Flatsedge
Cypripedium parviflorum Salisb. - Yellow Lady's-Slipper
Cystopteris bulbifera (L.) Bernh. - Bulblet Bladder Fern
Dalea candida Michx. ex Willd. - White Prairie-Clover
Dalea candida var. candida - White Prairie Clover
Dalea purpurea Vent. - Violet Prairie-Clover
Daucus carota L. - Queen Anne's-Lace
Descurainia pinnata (Walter) Britton - Western Tansy-Mustard
Desmodium canadense (L.) DC. - Showy Tick-Trefoil
Desmodium canescens (L.) DC. - Hoary Tick-Trefoil
Desmodium ciliare (Muhl. ex Willd.) DC. - Hairy Small-Leaf Tick-Trefoil
Desmodium glabellum (Michx.) DC. - Dillenius' Tick-Trefoil
Desmodium illinoense A. Gray - Illinois Tick-Trefoil
Desmodium marilandicum (L.) DC. - Small-Leaf Tick-Trefoil
Desmodium paniculatum (L.) DC. - Panicled-Leaf Tick-Trefoil
Desmodium paniculatum var. paniculatum - Panicled-Leaf Tick-Trefoil
Desmodium perplexum B. G. Schub. - Perplexed Tick-Trefoil
Dianthus armeria L. - Deptford Pink
Diarrhena americana P. Beauv. - American Beakgrain
Dichanthelium clandestinum (L.) Gould - Deer-Tongue Witch Grass
Dichanthelium latifolium (L.) Harvill - Broad-Leaf Witch Grass
Dichanthelium ovale subsp. ovale - Egg-Leaf Witch Grass
Diervilla lonicera Mill. - Northern Bush-Honeysuckle
Digitaria cognata (Schult.) Pilg. - Carolina Crab Grass
Diphasiastrum tristachyum (Pursh) Holub - Deep-Root Creeping-Cedar
Dodecatheon meadia L. - Pride-of-Ohio
Drosera intermedia Hayne - Spoon-Leaf Sundew
Echinacea pallida (Nutt.) Nutt. - Pale Purple-Coneflower
Echinacea purpurea (L.) Moench - Eastern Purple-Coneflower
Echinochloa walteri (Pursh) A. Heller - Long-Awn Cock's-Spur Grass
Eleocharis compressa Sull. - Flat-Stem Spike-Rush
Eleocharis elliptica Kunth - Elliptic Spike-Rush
Eleocharis engelmannii Steud. - Engelmann's Spike-Rush
Eleocharis intermedia Schult. - Intermediate Spike-Rush
Eleocharis melanocarpa Torr. - Black-Fruit Spike-Rush
Eleocharis microcarpa Torr. - Small-Fruit Spike-Rush
Eleocharis robbinsii Oakes - Robbins' Spike-Rush
Eleusine indica (L.) Gaertn. - Indian Goose Grass
Elodea canadensis Michx. - Canadian Waterweed
Elymus canadensis L. - Nodding Wild Rye
Elymus hystrix L. - Eastern Bottle-Brush Grass
Elymus repens (L.) Gould - Creeping Wild Rye
Elymus riparius Wiegand - River-Bank Wild Rye
Elymus virginicus L. - Virginia Wild Rye
Endodeca serpentaria (L.) Raf. - Virginia-Snakeroot
Enemion biternatum Raf. - Eastern False Rue-Anemone
Epilobium coloratum Biehler - Purple-Leaf Willowherb
Equisetum arvense L. - Field Horsetail
Equisetum fluviatile L. - Water Horsetail
Equisetum hyemale L. - Tall Scouring-Rush
Equisetum laevigatum A. Braun - Smooth Scouring-Rush
Erigenia bulbosa (Michx.) Nutt. - Harbinger-of-Spring
Erigeron annuus (L.) Pers. - Eastern Daisy Fleabane
Erigeron philadelphicus L. - Philadelphia Fleabane
Erigeron pulchellus Michx. - Robin's-Plantain
Eriocaulon aquaticum (Hill) Druce - Seven-Angle Pipewort
Eriophorum virginicum L. - Tawny Cotton-Grass
Erysimum cheiranthoides L. - Worm-Seed Wallflower
Euonymus obovatus Nutt. - Running Strawberry-Bush