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Families: 142
Genera: 592
Species: 1490
Total Taxa (details): 1561

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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 negundo L. - Ash-Leaf Maple
Acer rubrum L. - Red Maple
Acer saccharinum L. - Silver Maple
Achillea millefolium L. - Woolly Yarrow
Acorus americanus (Raf.) Raf. - Several-Vein Sweetflag
Acorus calamus L. - Single-Vein Sweetflag
Actaea pachypoda Elliott - White Baneberry
Adiantum pedatum L. - Northern Maidenhair
Agalinis gattingeri (Small) Small - Round-Stem False Foxglove
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
Agrostemma githago L. - Common Corncockle
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 hybridus L. - Smooth Amaranth
Ambrosia trifida L. - Great Ragweed
Amelanchier arborea (Michx. f.) Fernald - Intermediate Service-Berry
Amelanchier laevis Wiegand - Allegheny Service-Berry
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
Angelica atropurpurea L. - Purple-Stem Angelica
Antennaria howellii Greene - Small Pussytoes
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
Arabis viridis Harger - Green False Rockcress
Aralia nudicaulis L. - Wild Sarsaparilla
Aralia racemosa L. - American Spikenard
Aralia spinosa L. - Devil's-Walkingstick
Arenaria serpyllifolia L. - Thyme-Leaf Sandwort
Arethusa bulbosa L. - Dragon's-Mouth
Aristida oligantha Michx. - Prairie Three-Awn
Aristida purpurascens Poir. - Arrow-Feather Three-Awn
Arnoglossum plantagineum Raf. - Groove-Stem Indian-Plantain
Artemisia campestris L. - Pacific Wormwood
Asarum canadense L. - Canadian Wild Ginger
Asclepias amplexicaulis Sm. - Clasping Milkweed
Asclepias exaltata L. - Poke 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 patula L. - Halberd-Leaf Orache
Aureolaria flava (L.) Farw. - Smooth Yellow False Foxglove
Aureolaria flava var. flava - Smooth Yellow False Foxglove
Aureolaria pedicularia (L.) Raf. - Fern-Leaf Yellow False Foxglove
Aureolaria virginica (L.) Pennell - Downy Yellow False Foxglove
Baptisia lactea (Raf.) Thieret - Largeleaf Wild Indigo
Baptisia lactea var. lactea - Largeleaf Wild Indigo
Barbarea verna (Mill.) Asch. - Early Yellow-Rocket
Barbarea vulgaris W. T. Aiton - Garden Yellow-Rocket
Berberis aquifolium Pursh - Holly-Leaf Oregon-Grape
Berteroa incana (L.) DC. - Hoary False Madwort
Besseya bullii (Eaton) Rydb. - Bull's Coraldrops
Betula nigra L. - River Birch
Betula pumila L. - Bog Birch
Bidens beckii Torr. ex Spreng. - Beck's Water-Marigold
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 vulgata Greene - Tall Beggarticks
Blephilia ciliata (L.) Benth. - Downy Pagoda-Plant
Boehmeria cylindrica (L.) Sw. - Small-Spike False Nettle
Bromus ciliatus L. - Fringed Brome
Bromus inermis Leyss. - Smooth Brome
Bromus japonicus Thunb. - Japanese 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
Calla palustris L. - Water-Dragon
Callitriche terrestris Raf. - Terrestrial Water-Starwort
Caltha palustris L. - Yellow Marsh-Marigold
Calystegia catesbeiana Pursh - Catesby's False Bindweed
Calystegia pubescens Lindl. - Hairy False Bindweed
Calystegia sepium (L.) R. Br. - Hedge False Bindweed
Camelina microcarpa Andrz. ex DC. - Little-Pod False Flax
Campanula aparinoides Pursh - Marsh Bellflower
Campanula rapunculoides L. - Creeping Bellflower
Campanula rotundifolia L. - Bluebell-of-Scotland
Cardamine douglassii Britton - Limestone Bittercress
Cardamine pratensis L. - Cuckoo-Flower
Carex acutiformis Ehrh. - Lesser Pond Sedge
Carex alata Torr. - Broad-Wing Sedge
Carex albolutescens Schwein. - Green-White Sedge
Carex albursina E. Sheld. - White Bear Sedge
Carex amphibola Steud. - Eastern Narrow-Leaf Sedge
Carex aquatilis Wahlenb. - Leafy Tussock Sedge
Carex atlantica L. H. Bailey - Prickly Bog Sedge
Carex bicknellii Britton - Bicknell's Sedge
Carex blanda Dewey - Eastern Woodland Sedge
Carex buxbaumii Wahlenb. - Brown Bog Sedge
Carex canescens L. - Hoary Sedge
Carex communis L.H. Bailey - Fibrous-Root Sedge
Carex comosa Boott - Bearded Sedge
Carex conjuncta Boott - Soft Fox Sedge
Carex crinita Lam. - Fringed Sedge
Carex cryptolepis Mack. - Northeastern Sedge
Carex debilis Michx. - White-Edge Sedge
Carex diandra Schrank - Lesser Tussock Sedge
Carex digitalis Willd. - Slender Woodland Sedge
Carex digitalis var. digitalis - Slender Woodland Sedge
Carex disperma Dewey - Soft-Leaf Sedge
Carex emoryi Dewey - Emory's Sedge
Carex flava L. - Yellow-Green Sedge
Carex frankii Kunth - Frank's Sedge
Carex gracilescens Steud. - Slender Loose-Flower Sedge
Carex granularis Muhl. ex Willd. - Limestone-Meadow Sedge
Carex grayi J. Carey - Gray's Sedge
Carex grisea Wahlenb. - Inflated Narrow-Leaf Sedge
Carex hirsutella Mack. - Fuzzy-Wuzzy Sedge
Carex hirtifolia Mack. - Pubescent Sedge
Carex hitchcockiana Dewey - Hitchcock's Sedge
Carex hyalinolepis Steud. - Shoreline Sedge
Carex intumescens Rudge - Greater Bladder Sedge
Carex lacustris Willd. - Lakebank Sedge
Carex lasiocarpa Ehrh. - Woolly-Fruit Sedge
Carex laxiculmis Schwein. - Spreading Sedge
Carex laxiflora Lam. - Broad Loose-Flower Sedge
Carex leavenworthii Dewey - Leavenworth's Sedge
Carex leptalea Wahlenb. - Bristly-Stalk Sedge
Carex leptalea subsp. harperi - Bristly-Stalk Sedge
Carex leptalea subsp. leptalea - Bristlystalked Sedge
Carex limosa L. - Mud Sedge
Carex longii Mack. - Long's Sedge
Carex lurida Wahlenb. - Sallow 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 plantaginea Lam. - Plantain-Leaf Sedge
Carex prairea Dewey - Prairie Sedge
Carex prasina Wahlenb. - Drooping Sedge
Carex radiata (Wahlenb.) Small - Eastern Star Sedge
Carex retrorsa Schwein. - Retrorse Sedge
Carex sartwellii Dewey - Sartwell's Sedge
Carex scabrata Schwein. - Eastern Rough Sedge
Carex scoparia Schkuhr ex Willd. - Pointed Broom Sedge
Carex seorsa Howe - Weak Stellate Sedge
Carex siccata Dewey - Dry-Spike 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 tribuloides Wahlenb. - Blunt Broom Sedge
Carex trisperma Dewey - Three-Seed Sedge
Carex tuckermanii Dewey - Tuckerman's Sedge
Carex typhina Michx. - Cat-Tail 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
Carex woodii Dewey - Pretty Sedge
Carex L. - 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
Catalpa bignonioides Walter - Southern Catalpa
Ceanothus americanus L. - New Jersey-Tea
Celastrus scandens L. - American Bittersweet
Celtis occidentalis L. - Common Hackberry
Celtis tenuifolia Nutt. - Dwarf Hackberry
Centaurea cyanus L. - Garden Cornflower
Cephalanthus occidentalis L. - Common Buttonbush
Cerastium arvense L. - Field Mouse-Ear Chickweed
Cerastium fontanum Baumg. - Common Mouse-Ear Chickweed
Cerastium nutans Raf. - Nodding Mouse-Ear Chickweed
Cerastium velutinum Raf. - Large Mouse-Ear Chickweed
Cerastium velutinum var. velutinum - Large Mouse-Ear Chickweed
Chelidonium majus L. - Greater Celandine
Chelone glabra L. - White Turtlehead
Chenopodium album L. - Lamb's-Quarters
Chenopodium berlandieri Moq. - Pit-Seed Goosefoot
Chenopodium standleyanum Aellen - Standley's Goosefoot
Chloris verticillata Nutt. - Tumble Windmill Grass
Cicuta bulbifera L. - Bulblet-Bearing Water-Hemlock
Cicuta maculata L. - Spotted Water-Hemlock
Cinna arundinacea L. - Sweet Wood-Reed
Circaea alpina L. - Small Enchanter's-Nightshade
Circaea alpina subsp. alpina - Small Enchanter's-Nightshade
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
Clematis virginiana L. - Devil's-Darning-Needles
Coeloglossum viride (L.) Hartm. - Long-Bract Frog Orchid
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 palmata Nutt. - Stiff Tickseed
Coreopsis tinctoria Nutt. - Golden Tickseed
Coreopsis tripteris L. - Tall Tickseed
Cornus alternifolia L. f. - Alternate-Leaf Dogwood
Cornus florida L. - Flowering Dogwood
Cornus obliqua Raf. - Pale Dogwood
Cornus racemosa Lam. - Gray Dogwood
Cornus rugosa Lam. - Round-Leaf Dogwood
Corylus americana Walter - American Hazelnut
Cosmos bipinnatus Cav. - Garden Cosmos
Crataegus coccinea L. - Scarlet Hawthorn
Crataegus intricata Lange - Copenhagen Hawthorn
Crataegus macrosperma Ashe - Big-Fruit Hawthorn
Crataegus margarettae Ashe - Margarett's Hawthorn
Crataegus prona Ashe - Illinois Hawthorn
Crataegus punctata Jacq. - Dotted Hawthorn
Crepis tectorum L. - Narrow-Leaf Hawk's-Beard
Crocanthemum canadense (L.) Britton - Long-Branch Frostweed
Cuscuta cephalanthi Engelm. - Buttonbush Dodder
Cuscuta pentagona Engelm. - Bush-Clover Dodder
Cyperus bipartitus Torr. - Shining Flat Sedge
Cyperus diandrus Torr. - umbrella flatsedge
Cyperus erythrorhizos Muhl. - Red-Root Flat Sedge
Cyperus lupulinus (Spreng.) Marcks - Great Plains Flat Sedge
Cyperus lupulinus subsp. lupulinus - Great Plains flatsedge
Cyperus odoratus L. - Rusty Flat Sedge
Cyperus squarrosus L. - Awned Flat Sedge
Cyperus strigosus L. - Straw-Color Flat Sedge
Cyperus × deamii O’Neill - Hybrid Flatsedge
Cypripedium acaule Aiton - Pink Lady's-Slipper
Cypripedium candidum Muhl. ex Willd. - Small White Lady's-Slipper
Cypripedium parviflorum Salisb. - Yellow Lady's-Slipper
Cypripedium reginae Walter - Showy Lady's-Slipper
Cystopteris bulbifera (L.) Bernh. - Bulblet Bladder Fern
Dactylis glomerata L. - Orchard Grass
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
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 cuspidatum var. cuspidatum - Large-Bract 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
Desmodium rotundifolium DC. - Prostrate Tick-Trefoil
Dianthus armeria L. - Deptford Pink
Dicentra cucullaria (L.) Bernh. - Dutchman's-Breeches
Dichanthelium clandestinum (L.) Gould - Deer-Tongue Witch Grass
Diervilla lonicera Mill. - Northern Bush-Honeysuckle