Authors: Paul E Rothrock
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Families: 135
Genera: 520
Species: 1205
Total Taxa (details): 1247

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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. - western yarrow
Acorus calamus L. - Single-Vein Sweetflag
Actaea pachypoda Elliott - White Baneberry
Actaea racemosa L. - Black Bugbane
Adiantum pedatum L. - Northern Maidenhair
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
Alisma subcordatum Raf. - American Water-Plantain
Allium canadense L. - Meadow Garlic
Allium cernuum Roth - Nodding Onion
Alopecurus aequalis Sobol. - Short-Awn Meadow-Foxtail
Alopecurus aequalis var. aequalis - Short-Awn Meadow-Foxtail
Alopecurus carolinianus Walter - Tufted Meadow-Foxtail
Alopecurus pratensis L. - Field Meadow-Foxtail
Amaranthus hybridus L. - Smooth Amaranth
Amaranthus spinosus L. - Spiny Amaranth
Ambrosia trifida L. - Great Ragweed
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
Anthoxanthum odoratum L. - Large Sweet Vernal Grass
Apocynum androsaemifolium L. - Spreading Dogbane
Aquilegia canadensis L. - Red Columbine
Arabis pycnocarpa M. Hopkins - Hairy Eared Rockcress
Aralia nudicaulis L. - Wild Sarsaparilla
Aralia racemosa L. - American Spikenard
Arenaria serpyllifolia L. - Thyme-Leaf Sandwort
Arethusa bulbosa L. - Dragon's-Mouth
Artemisia annua L. - Annual Wormwood
Asarum canadense L. - Canadian Wild Ginger
Asclepias exaltata L. - Poke Milkweed
Asclepias incarnata L. - Swamp Milkweed
Asclepias purpurascens L. - Purple Milkweed
Asclepias quadrifolia Jacq. - Four-Leaf Milkweed
Asclepias syriaca L. - Common Milkweed
Asclepias tuberosa L. - Butterfly Milkweed
Asclepias verticillata L. - Whorled 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
Baptisia lactea (Raf.) Thieret - Largeleaf Wild Indigo
Baptisia lactea var. lactea - Largeleaf Wild Indigo
Barbarea vulgaris W. T. Aiton - Garden Yellow-Rocket
Berberis thunbergii DC. - Japanese Barberry
Berteroa incana (L.) DC. - Hoary False Madwort
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
Blitum nuttallianum Schult. - Nuttall's Poverty-Weed
Boehmeria cylindrica (L.) Sw. - Small-Spike False Nettle
Bromus ciliatus L. - Fringed Brome
Bromus inermis Leyss. - Smooth Brome
Bromus japonicus Thunb. - Japanese brome
Bromus nottowayanus Fernald - Nottoway Valley Brome
Bromus pubescens Muhl. ex Willd. - Hairy Woodland Brome
Bromus tectorum L. - Cheat Grass
Caltha palustris L. - Yellow Marsh-Marigold
Calystegia sepium (L.) R. Br. - Hedge False Bindweed
Calystegia silvatica (Kit.) Griseb. - Short-Stalk False Bindweed
Campanula aparinoides Pursh - Marsh Bellflower
Campanula rapunculoides L. - Creeping Bellflower
Cardamine douglassii Britton - Limestone Bittercress
Cardamine hirsuta L. - Hairy Bittercress
Carduus nutans L. - Nodding Plumeless-Thistle
Carex aggregata Mack. - Glomerate Sedge
Carex albursina E. Sheld. - White Bear Sedge
Carex alopecoidea Tuck. - Fox-Tail Sedge
Carex amphibola Steud. - Eastern Narrow-Leaf 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 decomposita Muhl. - Cypress-Knee 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 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 lurida Wahlenb. - Sallow Sedge
Carex meadii Dewey - Mead's Sedge
Carex mesochorea Mack. - Midland Sedge
Carex molesta Mack. ex Bright - Troublesome Sedge
Carex normalis Mack. - Greater Straw Sedge
Carex pensylvanica Lam. - Pennsylvania Sedge
Carex prasina Wahlenb. - Drooping Sedge
Carex radiata (Wahlenb.) Small - Eastern Star Sedge
Carex scoparia Schkuhr ex Willd. - Pointed Broom Sedge
Carex shortiana Dewey - Short's 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 stricta Lam. - Uptight Sedge
Carex tribuloides Wahlenb. - Blunt Broom Sedge
Carex tuckermanii Dewey - Tuckerman's Sedge
Carex typhina Michx. - Cat-Tail Sedge
Carex utriculata Boott - Northwest Territory Sedge
Carex vulpinoidea Michx. - Common Fox Sedge
Carex woodii Dewey - Pretty Sedge
Carpinus caroliniana Walter - American Hornbeam
Carya ovata (Mill.) K. Koch - Shag-Bark Hickory
Castilleja coccinea (L.) Spreng. - Scarlet Indian-Paintbrush
Ceanothus americanus L. - New Jersey-Tea
Celastrus scandens L. - American Bittersweet
Celtis occidentalis L. - Common Hackberry
Centaurea jacea L. - Brown-Ray Knapweed
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 pumilum W. Curtis - European 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
Chelone obliqua L. - Red 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 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
Claytonia virginica L. - Virginia Springbeauty
Clematis terniflora DC. - Sweet Autumn Virgin's-Bower
Clematis virginiana L. - Devil's-Darning-Needles
Coeloglossum viride (L.) Hartm. - Long-Bract Frog Orchid
Collinsia verna Nutt. - Spring Blue-Eyed Mary
Comarum palustre L. - Purple Marshlocks
Commelina communis L. - Asiatic Dayflower
Conium maculatum L. - Poison-Hemlock
Consolida ajacis (L.) Schur - Doubtful Knight's-Spur
Convolvulus arvensis L. - Field Bindweed
Coptis trifolia (L.) Salisb. - Three-Leaf Goldthread
Coreopsis lanceolata L. - Lance-Leaf 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
Cornus sericea L. - redosier dogwood
Corylus americana Walter - American Hazelnut
Crataegus crus-galli L. - Cock-Spur Hawthorn
Crataegus macrosperma Ashe - Big-Fruit Hawthorn
Crataegus margarettae Ashe - Margarett's Hawthorn
Crataegus punctata Jacq. - Dotted Hawthorn
Crataegus × disperma Ashe - Hybrid Hawthorn
Crepis capillaris (L.) Wallr. - Smooth Hawk's-Beard
Crocanthemum canadense (L.) Britton - Long-Branch Frostweed
Cuscuta cephalanthi Engelm. - Buttonbush Dodder
Cuscuta polygonorum Engelm. - Smartweed Dodder
Cyperus bipartitus Torr. - Shining Flat Sedge
Cyperus erythrorhizos Muhl. - Red-Root Flat Sedge
Cyperus lupulinus (Spreng.) Marcks - Great Plains Flat Sedge
Cyperus odoratus L. - Rusty Flat Sedge
Cyperus squarrosus L. - Awned Flat Sedge
Cyperus strigosus L. - Straw-Color Flat Sedge
Cypripedium acaule Aiton - Pink Lady's-Slipper
Cypripedium parviflorum Salisb. - Yellow Lady's-Slipper
Cystopteris bulbifera (L.) Bernh. - Bulblet Bladder Fern
Dactylis glomerata L. - Orchard Grass
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 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
Diarrhena americana P. Beauv. - American Beakgrain
Dicentra cucullaria (L.) Bernh. - Dutchman's-Breeches
Dichanthelium clandestinum (L.) Gould - Deer-Tongue Witch Grass
Dipsacus fullonum L. - Fuller's Teasel
Dirca palustris L. - Eastern Leatherwood
Dodecatheon meadia L. - Pride-of-Ohio
Draba verna L. - Spring Whitlow-Grass
Drosera rotundifolia L. - Round-Leaf Sundew
Echium vulgare L. - Common Viper's-Bugloss
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
Eragrostis minor Host - Little Love Grass
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
Eriophorum vaginatum L. - Tussock Cotton-Grass
Eriophorum virginicum L. - Tawny Cotton-Grass
Erysimum cheiranthoides L. - Worm-Seed Wallflower
Erysimum repandum L. - Spreading Wallflower
Erythronium albidum Nutt. - Small White Fawn-Lily
Erythronium americanum Ker Gawl. - American Trout-Lily
Euonymus europaeus L. - European Spindletree
Euonymus obovatus Nutt. - Running Strawberry-Bush
Eupatorium altissimum L. - Tall Thoroughwort
Eupatorium serotinum Michx. - Late-Flowering Thoroughwort
Euphorbia corollata L. - Flowering Spurge
Euphorbia cyparissias L. - Cypress Spurge
Euphorbia davidii Subils - David's Spurge
Euphorbia dentata Michx. - Toothed Spurge
Euphorbia maculata L. - Spotted Sandmat
Euphorbia marginata Pursh - Snow-on-the-Mountain
Euphorbia peplus L. - Petty Spurge
Eurybia macrophylla (L.) Cass. - Large-Leaf Wood-Aster
Eutrochium purpureum (L.) E. E. Lamont - Sweet-Scented Joe-Pye-Weed
Eutrochium purpureum var. purpureum - Sweetscented Joe Pye Weed
Fagopyrum esculentum Moench - Garden Buckwheat
Fagus grandifolia Ehrh. - American Beech
Fallopia scandens (L.) Holub - Climbing Black-Bindweed
Fragaria vesca L. - Woodland Strawberry
Fragaria virginiana Mill. - Virginia Strawberry
Frangula alnus Mill. - Glossy False Buckthorn