Authors: Paul E Rothrock

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Families: 148
Genera: 697
Species: 1876
Total Taxa (details): 1956

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Acalypha gracilens A. Gray - Slender Three-Seed-Mercury
Acalypha rhomboidea Raf. - Common Three-Seed-Mercury
Acer negundo L. - Ash-Leaf Maple
Acer platanoides L. - Norway Maple
Acer rubrum L. - Red Maple
Acer saccharinum L. - Silver Maple
Achillea millefolium L. - common yarrow
Acmispon americanus var. americanus - American Bird's-Foot Trefoil
Acorus americanus (Raf.) Raf. - Several-Vein Sweetflag
Acorus calamus L. - Single-Vein Sweetflag
Actaea pachypoda Elliott - White Baneberry
Adiantum pedatum L. - Northern Maidenhair
Aegilops cylindrica Host - Jointed Goat Grass
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
Agastache nepetoides (L.) Kuntze - Yellow Giant-Hyssop
Agrimonia gryposepala Wallr. - Tall Hairy Grooveburr
Agrimonia pubescens Wallr. - Soft Grooveburr
Agrimonia rostellata Wallr. - Beaked Grooveburr
Agropyron cristatum (L.) Gaertn. - Crested Wheat Grass
Agrostemma githago L. - Common Corncockle
Agrostis stolonifera L. - Spreading Bent
Ajuga reptans L. - Carpet Bugle
Alcea rosea L. - Hollyhock
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
Alopecurus geniculatus L. - Marsh Meadow-Foxtail
Alopecurus pratensis L. - Field Meadow-Foxtail
Amaranthus hybridus L. - Smooth Amaranth
Ambrosia psilostachya DC. - Perennial Ragweed
Ambrosia trifida L. - Great Ragweed
Amelanchier arborea (Michx. f.) Fernald - Intermediate Service-Berry
Amelanchier laevis Wiegand - Allegheny Service-Berry
Amelanchier sanguinea (Pursh) DC. - Round-Leaf Service-Berry
Amelanchier spicata (Lam.) K. Koch - Running Service-Berry
Ammophila breviligulata Fernald - American beachgrass
Amorpha fruticosa L. - False Indigo-Bush
Andropogon virginicus L. - Chalky Bluestem
Androsace occidentalis Pursh - Western Rock-Jasmine
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 arvensis L. - Corn Chamomile
Anthemis cotula L. - Stinking Chamomile
Anthoxanthum odoratum L. - Large Sweet Vernal Grass
Apocynum androsaemifolium L. - Spreading Dogbane
Aquilegia canadensis L. - Red Columbine
Aralia hispida Vent. - Bristly Sarsaparilla
Aralia nudicaulis L. - Wild Sarsaparilla
Aralia racemosa L. - American Spikenard
Arctium lappa L. - Greater Burrdock
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
Aristida tuberculosa Nutt. - Seaside Three-Awn
Arnoglossum plantagineum Raf. - Groove-Stem Indian-Plantain
Artemisia biennis Willd. - Biennial Wormwood
Artemisia campestris L. - Pacific Wormwood
Artemisia vulgaris L. - Common 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 grandiflora (Benth.) Pennell - Large-Flower Yellow False Foxglove
Aureolaria grandiflora var. pulchra Pennell - Large-Flower Yellow False Foxglove
Aureolaria pedicularia (L.) Raf. - Fern-Leaf Yellow False Foxglove
Azolla cristata Kaulf. - Crested Mosquito Fern
Baptisia alba R.Br. - White Wild Indigo
Baptisia leucophaea Nutt. - Longbract Wild Indigo
Baptisia × deamii Larisey - Hybrid Wild Indigo
Barbarea vulgaris W. T. Aiton - Garden Yellow-Rocket
Berberis aquifolium Pursh - Holly-Leaf Oregon-Grape
Berberis thunbergii DC. - Japanese Barberry
Berteroa incana (L.) DC. - Hoary False Madwort
Betula nigra L. - River Birch
Betula pendula Roth - European Weeping Birch
Betula pumila L. - Bog Birch
Bidens aristosa (Michx.) Britton - Bearded Beggarticks
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 polylepis S. F. Blake - Bearded Beggarticks
Bidens tripartita L. - Three-Lobe Beggarticks
Bidens vulgata Greene - Tall Beggarticks
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 sterilis L. - Poverty Brome
Bromus tectorum L. - Cheat Grass
Buchnera americana L. - American Bluehearts
Calla palustris L. - Water-Dragon
Callitriche heterophylla Pursh - Greater Water-Starwort
Caltha palustris L. - Yellow Marsh-Marigold
Calystegia sepium (L.) R. Br. - Hedge False Bindweed
Calystegia silvatica (Kit.) Griseb. - Short-Stalk 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 hirsuta L. - Hairy Bittercress
Cardamine impatiens L. - Narrow-Leaf Bittercress
Cardamine parviflora L. - Sand Bittercress
Cardamine pratensis L. - Cuckoo-Flower
Carduus nutans L. - Nodding Plumeless-Thistle
Carex alata Torr. - Broad-Wing Sedge
Carex albolutescens Schwein. - Green-White Sedge
Carex albursina E. Sheld. - White Bear Sedge
Carex alopecoidea Tuck. - Fox-Tail Sedge
Carex amphibola Steud. - Eastern Narrow-Leaf Sedge
Carex aquatilis Wahlenb. - Leafy Tussock Sedge
Carex arctata Boott - Drooping Woodland 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 bushii Mack. - Bush's 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 crawei Dewey - Crawe's Sedge
Carex crawfordii Fernald - Crawford's 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 eburnea Boott - Bristle-Leaf Sedge
Carex emoryi Dewey - Emory's Sedge
Carex flava L. - Yellow-Green Sedge
Carex folliculata L. - Northern Long 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 haydenii Dewey - Cloud Sedge
Carex hirsutella Mack. - Fuzzy-Wuzzy Sedge
Carex hirtifolia Mack. - Pubescent Sedge
Carex hitchcockiana Dewey - Hitchcock's Sedge
Carex hyalinolepis Steud. - Shoreline Sedge
Carex inops L. H. Bailey - Long-Stolon 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 leptalea Wahlenb. - Bristly-Stalk Sedge
Carex leptalea subsp. leptalea - Bristlystalked Sedge
Carex leptonervia (Fernald) Fernald - Nerveless Woodland 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 praegracilis W. Boott - Clustered Field Sedge
Carex prairea Dewey - Prairie Sedge
Carex prasina Wahlenb. - Drooping Sedge
Carex projecta Mack. - Necklace Sedge
Carex pseudocyperus L. - Cypress-Like Sedge
Carex radiata (Wahlenb.) Small - Eastern Star Sedge
Carex richardsonii R. Br. - Richardson's 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 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 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
Carpinus caroliniana Walter - American Hornbeam
Carum carvi L. - Caraway
Carya ovata (Mill.) K. Koch - Shag-Bark Hickory
Castilleja coccinea (L.) Spreng. - Scarlet Indian-Paintbrush
Catalpa bignonioides Walter - Southern Catalpa
Ceanothus americanus L. - New Jersey-Tea
Ceanothus herbaceus Raf. - Prairie Redroot
Celastrus orbiculatus Thunb. - Asian Bittersweet
Celastrus scandens L. - American Bittersweet
Celtis occidentalis L. - Common Hackberry
Celtis tenuifolia Nutt. - Dwarf Hackberry
Centaurea cyanus L. - Garden Cornflower
Centaurium erythraea Rafn - European Centaury
Cephalanthus occidentalis L. - Common Buttonbush
Cerastium fontanum Baumg. - Common Mouse-Ear Chickweed
Cerastium glomeratum Thuill. - Sticky Mouse-Ear Chickweed
Cerastium nutans Raf. - Nodding Mouse-Ear Chickweed
Cerastium pumilum W. Curtis - European Mouse-Ear Chickweed
Cerastium semidecandrum L. - Five-Stamen Mouse-Ear Chickweed
Cerastium tomentosum L. - Snow-in-Summer
Chaerophyllum tainturieri Hook. - Hairy-Fruit Chervil
Chamaemelum nobile (L.) All. - Garden Dog-Fennel
Chelidonium majus L. - Greater Celandine
Chelone glabra L. - White Turtlehead
Chenopodium album L. - Lamb's-Quarters
Chenopodium berlandieri Moq. - Pit-Seed Goosefoot
Chenopodium glaucum L. - Oak-Leaf Eurasian-Goosefoot
Chenopodium glaucum var. glaucum - Oak-Leaf Eurasian-Goosefoot
Chenopodium standleyanum Aellen - Standley's Goosefoot
Chimaphila maculata (L.) Pursh - Striped Prince's-Pine
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 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 terniflora DC. - Sweet Autumn Virgin's-Bower
Clematis virginiana L. - Devil's-Darning-Needles
Clintonia borealis (Aiton) Raf. - Yellow Bluebead-Lily
Coeloglossum viride (L.) Hartm. - Long-Bract Frog Orchid
Coleataenia rigidula subsp. rigidula - Red-Top Cut-Throat Grass
Collinsia verna Nutt. - Spring Blue-Eyed Mary
Collomia linearis Nutt. - Narrow-Leaf Mountain-Trumpet
Comarum palustre L. - Purple Marshlocks
Commelina communis L. - Asiatic Dayflower
Commelina erecta L. - White-Mouth Dayflower
Conium maculatum L. - Poison-Hemlock
Consolida regalis Gray - Royal Knight's-Spur
Convallaria majalis L. - European Lily-of-the-Valley
Convolvulus arvensis L. - Field Bindweed
Coptis trifolia (L.) Salisb. - Three-Leaf Goldthread
Coreopsis grandiflora Hogg ex Sweet - Large-Flower Tickseed
Coreopsis lanceolata L. - Lance-Leaf Tickseed
Coreopsis palmata Nutt. - Stiff Tickseed
Coreopsis tripteris L. - Tall Tickseed
Corispermum pallasii Steven - Siberian Bugseed
Cornus alternifolia L. f. - Alternate-Leaf Dogwood
Cornus canadensis L. - Canadian Bunchberry
Cornus florida L. - Flowering Dogwood