A
135 plants
- Aberdeen dewberry
- Adam-and-eve; Puttyroot
- Adam's needle
- Addison's rosette grass
- Alder buckthorn
- Alfalfa
- Alkali cordgrass
- Alkali grass
- Alkali sacaton
- Allegheny annual stonecrop
- Allegheny barberry; American barberry
- Allegheny blackberry
- Allegheny chinquapin
- Allegheny chinquapin
- Allegheny spurge
- Allegheny vine; Climbing fumitory
- Alsike clover
- American basswood
- American beak grass
- American beech
- American bellflower
- American bindweed
- American bindweed; Typical hedge bindweed
- American bird's-foot-trefoil
- American brooklime; American speedwell
- American bur reed
- American burnet
- American chestnut
- American columbia
- American columbo
- American dragonhead
- American elm
- American field mint
- American field pansy; Wild pansy; Johnny-jump-up; Field pansy
- American filbert; American hazelnut
- American fly honeysuckle
- American germander
- American germander
- American gromwell
- American holly
- American holly
- American hops
- American hops
- American hops
- American larch; Tamarack
- American linden; American basswood
- American lotus
- American manna grass
- American mountain ash
- American orpine; Allegheny annual stonecrop
- American pennyroyal
- American pennywort
- American plum
- American pondweed; Long-leaved pondweed
- American purple vetch
- American red raspberry
- American reed
- American spikenard
- American spikenard
- American storax; American snowbell
- American sweet flag; Several-veined sweet flag
- American vetch
- American water speedwell
- American wisteria
- American wormseed; Mexican tea
- American yew; Canadian yew; Ground hemlock
- Amethyst aster
- Amur cork; Amur corktree
- Amur honeysuckle
- Amur maple; Siberian maple; Flame amur maple
- Andrew's Lady's slipper
- Andrew's Lady's slipper
- Angel's trumpet; Sacred thorn-apple
- Angle-fruited milk vine
- Angle-stemmed primrose willow
- Angled spike rush; Square-stemmed spike-rush
- Anise root
- Annual bedstraw; Cleavers
- Annual black-eyed Susan
- Annual blue grass
- Annual fleabane; Eastern daisy fleabane
- Annual foxtail; Tufted meadow-foxtail
- Annual knawel
- Annual purple bladderwort; Small purple bladderwort
- Annual wild buckwheat
- Annual wildrice
- Annual wormwood; Sweet wormwood
- Appalachain bugbane
- Appalachian filmy fern
- Appalachian filmy fern; Appalachian bristle fern; Filmy fern
- Appalachian Vittaria, Appalachian shoestring fern; Appalachian gametophyte
- Apple
- Apple
- Apple mint
- Apple mint; Round-leaved apple-mint
- Apple-of-peru
- Apricot
- Arbor vitae
- Arching dewberry; Southern dewberry
- Aridland dessicatum; Aridland goosefoot
- Aromatic aster
- Aromatic sumac
- Arrow arum
- Arrow feather
- Arrow grass; American scheuchzeria
- Arrow grass; American scheuchzeria
- Arrow-leaved aster
- Arrow-leaved tear-thumb
- Arrow-leaved violet
- Arrow-leaved violet
- Arumleaf arrowhead
- Ascendent-flowered dewberry; Dryslope dewberry
- Ashe's panic grass; Variable rosette grass
- Ashy hydrangea
- Ashy sunflower
- Asian flatsedge
- Asian Net-veined holly fern
- Atlantic star sedge
- Atlantic wormseed
- Atlantic wormseed
- Aunt lucy
- Autumn bent grass
- Autumn bent grass
- Autumn blue grass
- Autumn olive
- Autumn sedge; Slender fimbry
- Autumn willow
- Awl-fruited oval sedge
- Awned bent grass; Elliott bentgrass
- Awned flat sedge
- Awned graceful sedge; Davis's sedge
- Awned oval sedge; Eastern straw sedge
- Awned wheat grass; Bearded wheatgrass
- Axil flower
- Axil flower
B
310 plants
- Bachelor's button
- Bailey's dewberry
- Bald cypress
- Baldwin's fimbristylis; Annual fimbry
- Baldwin's ironweed
- Ball mustard; Yellow ball mustard
- Balloon vine
- Balsam poplar
- Balsam ragwort
- Bare-stemmed tick trefoil
- Barnady's thistle; Yellow star thistle
- Barnyard grass
- Barnyard grass
- Barren strawberry
- Bartley's clubmoss
- Basil bee balm; White bergamot
- Basil mountain mint
- Basket oak; Swamp chestnut oak
- Basket willow
- Bastard toadflax
- Bastard toadflax
- Bay-leaved willow
- Beach grass
- Beach pea
- Beach peavine
- Beach peavine
- Beach sumac
- Beach three-awn grass; Seaside three-awn
- Beach wormwood
- Beach wormwood
- Beak-seeded knotweed; Leathery knotweed
- Beaked black snakeroot; Large-fruited black snakeroot
- Beaked corn salad
- Beaked panic grass
- Beaked panic grass
- Beaked tussock sedge; Twisted sedge
- Beaked willow; Gray willow
- Bear's foot; Yellow-flowered leafcup
- Bearberry
- Beard grass; Bearded skeleton grass
- Bearded panic grass; Bosc's rosette grass
- Bearded sprangle top
- Beardless wild rye
- Bebb's oval sedge
- Beck’s Water Marigold
- Beech drops
- Beech wood sedge; Broad loose-flowered sedge
- Beefsteak plant
- Beggar's lice; Two-rowed stickseed
- Beginner's pondweed
- Bent bracted sedge; Reflexed sedge
- Bent-seeded hop sedge; Tuckerman's sedge
- Bermuda grass
- Bermuda grass
- Bernard's violet
- Bessey's false foxglove
- Bessey's sand cherry
- Bicknell's oval sedge
- Bicknell's witch grass
- Biennial gaura
- Biennial wormwood
- Big baby's breath; Garden baby's-breath
- Big bluestem grass
- Big shellbark hickory
- Big-fruited hawthorn; Large-seeded hawthorn
- Big-leaved aster
- Big-tooth aspen
- Bigpod sesbania
- Biltmore ash
- Biltmore's hawthorn
- Bird's foot violet
- Bird's rape; Turnip
- Bird's-eye speedwell
- Birdseed grass
- Birdsfoot trefoil
- Birthwort; Virginia snakeroot
- Bishop's cap
- Bitter dock
- Bitternut hickory
- Bittersweet nightshade
- Bittersweet nightshade
- Bitterweed
- Bitterweed
- Black alder; European alder
- Black ash
- Black bindweed
- Black bugbane
- Black cherry
- Black chokeberry
- Black cohosh
- Black grass; Round-fruited rush
- Black gum
- Black haw; Smooth black haw
- Black henbane
- Black hickory
- Black huckleberry
- Black knapweed; Lesser knapweed
- Black locust
- Black maple
- Black medick
- Black mulberry
- Black mustard
- Black nightshade
- Black oak
- Black oat grass
- Black quillwort
- Black raspberry
- Black snakeroot
- Black swallow-wort
- Black walnut
- Black willow
- Black-eyed pea
- Black-eyed pea
- Black-eyed susan
- Black-eyed susan
- Black-eyed Susan
- Black-fruited spike rush
- Black-seeded rice grass
- Black-stemmed speenwort; Black-stalked spleenwort
- Blackberry lily
- Blackjack oak
- Blackjack oak
- Bladder campion
- Bladdernut; American bladdernut
- Blade duckweed; Sword bogmat
- Blazing star
- Blazing star
- Blighted goldenrod; Short-pappused goldenrod
- Bloodleaf
- Bloodroot
- Bloody cranesbill
- Blue ash
- Blue beech
- Blue beech; American hornbeam
- Blue cohosh
- Blue curls; Forked bluecurls
- Blue field madder
- Blue giant hyssop
- Blue grama
- Blue hearts
- Blue hosta
- Blue joint grass
- Blue joint grass
- Blue lettuce; Woodland blue lettuce
- Blue mud-plantain
- Blue phlox
- Blue phlox
- Blue sage
- Blue sedge
- Blue skullcap
- Blue star; Willow amsonia
- Blue toadflax
- Blue vervain
- Blue water iris; Zigzag iris
- Blue waxweed
- Blue wild indigo
- Blue wild indigo
- Blue-eyed mary
- Blue-eyed pearlwort
- Blue-leaved willow
- Bluebead; Yellow bluebeard-lily
- Bluebottle; Starch grape hyacinth
- Bluestem goldenrod
- Bluestem goldenrod
- Bluets; Yellow-eyed bluet
- Bluevine; Sandvine
- Blunt mountain mint; Clustered mountain-mint
- Blunt spike rush
- Blunt-flowered dodder; Southern dodder
- Blunt-leaf sandwort
- Blunt-leaved bedstraw
- Blunt-leaved senna
- Blunt-leaved spurge
- Blunt-lobed cliff-fern
- Blunt-lobed grape-fern
- Blunt-scaled oak sedge; White-tinged sedge
- Blunt-scaled wood sedge; White bear sedge
- Bog bedstraw
- Bog bladderwort; Hidden-fruited bladderwort
- Bog clearweed; Black-fruited clearweed
- Bog clubmoss; Northern bog club moss
- Bog goldenrod
- Bog lobelia; Kalm's lobelia
- Bog panicled sedge; Lesser tussock sedge
- Bog reed grass; Slim-stem reed grass
- Bog rosemary
- Bog spike rush; Robbins's spike-rush
- Bog willow
- Bohemian knotweed
- Boott's woodfern
- Border privet
- Border privet
- Border privet
- Boreal-bog sedge
- Boston ivy
- Bottlebrush grass
- Bottlebrush sedge; Sallow sedge
- Bottomland broomrape; Louisiana broomrape
- Bouncing bet
- Bowman's root
- Boxelder
- Boxelder
- Boxelder
- Boxwood knotweed; Prairie knotweed
- Bracken fern
- Bracted green orchid
- Bracted green orchid; Long-bracted green-orchid
- Bradford pear; Callery pear
- Bradley's spleenwort
- Branched bur reed
- Branched horseweed; Dwarf horseweed
- Braun's violet
- Brazilian waterweed
- Bridal wreath
- Bridalwreath
- Bristleless dark-green bulrush
- Bristly aster
- Bristly aster
- Bristly blackberry
- Bristly blackberry; Missouri dewberry
- Bristly carrail sedge; Frank's sedge
- Bristly crowfoot; Pennsylvania buttercup
- Bristly foxtail
- Bristly green brier
- Bristly locust
- Bristly locust
- Bristly locust
- Bristly sarsaparilla
- Bristly sedge; Bearded sedge
- Bristly sunflower; Oblong sunflower
- Bristly wood grass
- Brittle fragile fern; Brittle bladder fern
- Brittle naiad
- Britton's bushclover
- Broad beech fern
- Broad-leaved cattail
- Broad-leaved cow wheat; American cow-wheat
- Broad-leaved goldenrod; Zigzag goldenrod
- Broad-leaved oval sedge; Awl-fruited oval sedge
- Broad-leaved panic grass
- Broad-leaved panicled sedge; Cypress-knee sedge
- Broad-leaved pepper cress
- Broad-leaved purple coneflower; Eastern purple coneflower
- Broad-leaved small pondweed
- Broad-leaved spiderwort
- Broad-leaved spurge
- Broad-leaved wild rice
- Broad-leaved wood sedge
- Broadleaf signalgrass
- Brome hummock sedge
- Broom corn millet
- Broom corn millet
- Broom panic grass; Velvety panicgrass
- Broom sedge
- Broom sedge
- Broomweed; Broom snakeroot
- Brown beak rush
- Brown fox sedge
- Brown fox sedge
- Brown-eyed susan
- Brown-fruited rush
- Brown-headed fox sedge; Fox-tail sedge
- Brown-rayed knapweed
- Brownish sedge
- Brownish sedge
- Brownish sedge
- Buckbean
- Buckley's goldenrod
- Buckwheat
- Buffalo berry
- Buffalo bur; Horned nightshade
- Buffalo clover
- Buffalo current; Golden currant
- Bugle weed; Virginia bugleweed
- Bulb bittercress; White spring cress
- Bulblet bladder fern, Bladder fern
- Bulblet-bearing water hemlock
- Bulbous blue grass
- Bulbous buttercup
- Bulbous wood rush
- Bull brier; Saw greenbrier
- Bull thistle
- Bullhead lily; Variegated spatterdock
- Bulrush; Woodland bulrush
- Bunch flower
- Bunchberry
- Bur buttercup
- Bur chervil
- Bur cucumber; One-seeded burr-cucumber
- Bur oak
- Bur oak
- Burrweed marsh elder
- Bushy aster
- Bushy bluestem
- Bushy knotweed
- Bushy knotweed
- Bushy pinweed; Upright pinweed
- Buttercup phacelia
- Butterfly pea
- Butterfly pea; Atlantic pigeonwings
- Butterflyweed
- Butterflyweed
- Butterflyweed
- Butternut; White walnut
- Butterweed
- Buttonbush
- Buttonbush dodder
- Buttonweed
- Buttonweed; Velvetleaf
- Buzzy-Lizzy
C
383 plants
- Caley pea
- Callery pear
- Callery pear
- Callery pear
- Callery pear
- Camphor weed
- Camphorweed; Telegraph-plant
- Canada blueberry; Velvet-leaved bluebrry
- Canada clearweed
- Canada goldenrod
- Canada goldenrod
- Canada hawkweed
- Canada lily
- Canada manna grass
- Canada mayflower
- Canada plum
- Canada summer bluet
- Canada violet
- Canada violet; Canada white violet; Tall white violet
- Canada waterleaf; Broad-leaved waterleaf
- Canada wild ginger
- Canada wild rye
- Canada wild rye
- Canada wood nettle
- Canadian black snakeroot
- Canadian black snakeroot
- Canadian black snakeroot
- Canadian blue grass
- Canadian milk vetch
- Canadian milk vetch
- Canadian rush
- Canadian St. John's wort
- Canadian wild ginger
- Cancer root; One-flowered broomrape
- Cancer root; Squawroot
- Cancer weed; Lyre-leaved sage
- Candle anemone; Long-headed thimbleweed
- Caraway
- Cardinal flower
- Carey's heartsease; Carey's smartweed
- Carey's wood sedge
- Carolina anemone
- Carolina buckthorn
- Carolina cranesbill
- Carolina figwort
- Carolina leaf-flower
- Carolina mosquito fern
- Carolina panic grass; Cypress rosette grass
- Carolina phlox; Thick-leaved phlox
- Carolina puccoon
- Carolina rose
- Carolina rose
- Carolina thistle
- Carolina willow
- Carolina woollywhite
- Carolina yellow-eyed grass
- Carpet bugle
- Carpet weed; Green carpetweed
- Castor aralia
- Castor bean
- Cat brier; Round-leaved greenbrier
- Cat's foot; Field pussytoes
- Catbird grape
- Catchfly grass
- Catesby's hedge bindweed
- Catesby's hedge bindweed; Catesby's low bindweed
- Catnip
- Celandine
- Celandine poppy; Wood poppy
- Chaffweed
- Chairmaker's bulrush
- Chameleon plant
- Changing forget-me-not
- Chapman's meadow parsnip
- Charlock
- Cheat grass; Downy chess
- Checkerberry; True wintergreen
- Chee reedgrass
- Cheeses; Dwarf mallow
- Cherry bark oak
- Cherry silverberry
- Chesnut sedge
- Chick-pea milk vetch
- Chickasaw plum
- Chicory
- Chinese buckthron
- Chinese fountain grass
- Chinese matrimony vine
- Chinese peony
- Chinese silver grass
- Chinese wisteria
- Chinese yam
- Chinkapin oak
- Chocolate vine
- Choke cherry
- Christmas fern
- Cigar tree; Northern catalpa
- Ciliate crab grass
- Cinnamon fern
- Cinnamon willow herb
- Citronella horse balm; Northern horse-balm
- City goosefoot
- Clammy chickweed
- Clammy cudweed
- Clammy false foxglove
- Clammy ground cherry
- Clammy ground cherry
- Clammy hedge hyssop
- Clammy locust
- Clammy locust
- Clammy weed; Red-whiskered clammyweed
- Clammy weed; Red-whiskered clammyweed
- Clasping mullein
- Clasping pepperwort; Clasping cress
- Clasping St. John's wort
- Cleft phlox
- Cleft phlox
- Cleft violet; Three-lobed violet
- Cliff adder's tongue fern; Limestone adder's-tongue
- Cliff clubmoss; Rock club moss
- Cliff onion; Prairie onion
- Climbing bittersweet; American bittersweet
- Climbing day flower; Creeping dayflower
- Climbing day flower; Creeping dayflower
- Climbing dogbane
- Climbing false buckwheat
- Climbing false buckwheat
- Climbing fern
- Climbing hempweed
- Climbing milkweed; Climbing angle-pod
- Clingman's hedge nettle
- Clinton's wood fern
- Closed bottle gentian
- Closed gentian
- Clustered black snakeroot
- Clustered broom rape
- Clustered dock
- Clustered false foxglove
- Clustered poppy mallow
- Clustered wild bean; Pink fuzzy-bean
- Coarse smartweed
- Coastal sandbur
- Cock-spur hawthorn
- Cock-spur hawthorn
- Cock-spur hawthorn
- Cocklebur
- Cockscomb
- Cockspur grass; Long-awn cock's-spur grass
- Coffee senna
- Colic root
- Colorado bluestem
- Coltsfoot
- Columbine; Wild Columbine
- Comb pondweed; Sago false-pondweed
- Comb-leaved cow wheat; American cow-wheat
- Common alder; Smooth alder
- Common alfalfa
- Common alumroot
- Common arrowhead
- Common baby's breath; Tall baby's-breath
- Common balm; Lemon balm
- Common barberry; European barberry
- Common barley
- Common barley
- Common beech sedge;
- Common beech sedge; Fibrous-rooted sedge
- Common beggar's tick
- Common blackberry
- Common bladderwort; Great bladderwort
- Common blue violet; Dooryard viole; Downy blue violet
- Common blue-eyed grass
- Common bog arrow grass
- Common boneset
- Common buckthorn; European buckthorn
- Common bugseed; Pallas's bugseed
- Common bur reed; Giant burr-reed
- Common bur sedge; Gray's sedge
- Common burdock
- Common carrion flower
- Common catalpa; Southern catalpa
- Common cattail sedge
- Common centaury; European centaury
- Common chickweed
- Common chickweed
- Common chickweed
- Common choke cherry
- Common cinquefoil; Old-field cinquefoil
- Common comfrey
- Common corncockle
- Common dandelion
- Common day flower; Asiatic dayflower
- Common dewberry; Whiplash dewberry
- Common dodder; Gronovius's dodder
- Common dodder; Gronovius's dodder
- Common dodder; Gronovius's dodder
- Common elderberry
- Common enchanger's nightshade; Broad-leaf enchanter's nightshade
- Common evening primrose
- Common fig
- Common flax; Annual blue flax
- Common flowering quince
- Common fly honeysuckle
- Common fly honeysuckle
- Common forget-me-not; True forget-me-not
- Common fox sedge; Stalk-grained sedge
- Common Globe Amaranth
- Common goat's beard
- Common grape hyacinth
- Common groundsel
- Common hop sedge
- Common hops; European hops
- Common hoptree
- Common horehound
- Common horsetail, Field horsetail
- Common hound's tongue
- Common ironweed
- Common juniper
- Common juniper; Ground juniper
- Common knotweed; Yard knotweed
- Common lady fern
- Common lake sedge; Lakebank sedge
- Common maidenhair
- Common matrimony vine
- Common milfoil; Common yarrow
- Common milkweed
- Common morning glory
- Common mountain mint; Virginia mountain-mint
- Common mouse-ear chickweed
- Common mouse-ear chickweed
- Common naiad; Slender naiad
- Common ninebark; Eastern ninebark
- Common nipplewort
- Common panic grass
- Common pepper grass
- Common pepper grass; Poor-man's pepperwort
- Common periwinkle; Myrtle
- Common plantain; Great plantain
- Common polypody
- Common pondweed; Floating-leaved pondweed
- Common privet
- Common purpletop
- Common purpletop
- Common purslane
- Common pussy toes; Small plaintain-leaved pussytoes
- Common ragweed
- Common red raspberry; European red raspberry
- Common reed
- Common reed
- Common reed
- Common rockrose; Long-branched frostweed
- Common rush; Lamp rush
- Common rusty nut sedge; Rusty flat-sedge
- Common satin grass
- Common selfheal
- Common sneezeweed
- Common sneezeweed
- Common sow thistle
- Common sow thistle; Store-front sow thistle
- Common speedwell
- Common speedwell
- Common spiderwort; Smooth spiderwort
- Common St. John's wort
- Common star-of-bethlehem
- Common stiff sedge; Rigid sedge
- Common streambank chervil; Wild chervil
- Common sunflower
- Common sunflower
- Common tansy
- Common teasel
- Common tussock sedge; Upright sedge
- Common valerian; Hairy valerian
- Common water horehound; American bugleweed
- Common water hyacinth
- Common water plantain; Small-flowered water plantain
- Common water starwort
- Common waterweed
- Common white violet; Striped white violet
- Common whitlow cress
- Common wild comfrey
- Common wild yam
- Common wood fern; Evergreen wood fern
- Common wood reed
- Common wood rush
- Common wood rush
- Common wood rush; Hedgehog wood-rush
- Common wood sedge; Eastern woodland sedge
- Common woodsia
- Common wooly sedge; Broad-leaved woolly sedge
- Common wormwood
- Common yellow cress
- Common yellow cress; Marsh cress
- Common yellow lake sedge; Northwest territory sedge
- Compact dodder
- Compact dodder
- Compass plant
- Concealed sedge; Cumberland sedge
- Coontail
- Coppery St. John's wort
- Copse false buckwheat, Climbing false buckwheat
- Coralberry
- Cordroot sedge; Creeping sedge
- Corn
- Corn
- Corn chamomile
- Corn cockle
- Corn gromwell
- Corn poppy
- Corn salad; Navel corn-salad
- Corn speedwell
- Corn spurrey
- Cosmopolitan bulrush
- Costmary
- Coville's phacelia
- Cow herb; Cow-cockle
- Cow parsnip
- Cow vetch
- Cow vetch
- Cowbane
- Cowslip; Marsh marigold
- Crack willow
- Crane-fly orchid
- Cranesbill; Dove's-foot crane's-bill
- Crape myrtle
- Crawford's oval sedge
- Creek plum
- Creeping bent grass
- Creeping bracted sedge; Social sedge
- Creeping burhead
- Creeping bush clover
- Creeping buttercup
- Creeping cotoneaster
- Creeping cucumber
- Creeping juniper
- Creeping love grass; Creeping eragrostis
- Creeping primrose willow; Floating primrose willow
- Creeping smartweed
- Creeping vervain; Long-bracted verbena
- Creeping wood sorrel
- Creeping yellow cress
- Crested anoda
- Crested coral root
- Crested coral root
- Crested dog-tail grass
- Crested oval sedge
- Crested wheat grass
- Crested wheat grass
- Crested wood fern
- Crimson clover
- Crooked aster
- Cross milkwort
- Cross vine
- Crow poison
- Crowded oval sedge; Clustered sedge
- Crowfoot fox sedge; Raven-footed fox sedge
- Crowfoot grass; Goosegrass
- Cuckoo flower
- Cucumber magnolia
- Cultivated apple
- Cultivated tobacco
- Cultivated tobacco
- Culver's root
- Cup plant
- Cup plant
- Cupseed
- Curly dock
- Curly dock
- Curly-styled bracted sedge; Rosy sedge
- Cursed buttercup
- Cursed crowfoot
- Curtis's mouse-ear chickweed
- Curytop lady's thumb; Dock-leaved smartweed
- Cusped blue grass
- Cut-leaved blackberry
- Cut-leaved coneflower
- Cut-leaved grape-fern; Oblique grape fern; Dissected grape fern; Lace-fronded grape fern
- Cut-leaved teasel
- Cutleaf geranium
- Cutleaf groundcherry
- Cylindrical blazing star
- Cypress rosette grass
- Cypress rosette grass
- Cypress spurge
- Cypress-vine
D
109 plants
- Daffodil
- Dahurian buckthorn
- Dainties
- Daisy fleabane
- Daisy-leaf grape fern; Daisy-leaved moonwort
- Dalmation toadflax
- Dame's rocket
- Dark-green bulrush
- Dark-green carrion flower; Downy carrionflower
- Dark-scaled sedge; Brown bog sedge
- David's spurge
- Deam's beard tongue
- Deam's coneflower
- Deam's day flower; Erect dayflower
- Deam's dewberry
- Deam's oak
- Deam's phlox; Downy phlox
- Deam's rock cress
- Deam's rosin weed
- Deam's sedge
- Declined trillium; Drooping trillium
- Deep-Rooted club moss
- Deer vetch
- Deer-tongue grass
- Deerberry
- Deflexed bottlebrush sedge; Retrorse sedge
- Delta bulrush
- Dense cotton grass; Tussock cotton-grass
- Denseflower knotweed
- Deptford pink
- Devil's paint brush; Orange hawkweed
- Devil's walking stick
- Dewberry; Posey county blackberry
- Dill
- Dillenius's speedwell
- Dinky duckweed; Least duckweed
- Ditch stonecrop
- Dittany
- Divided crinkleroot; Divided toothwort
- Dodge's hawthorn
- Dog fennel; Stinking chanomile
- Dog mint
- Dog mustard
- Dog rose
- Dog violet; American dog violet
- Dogbane; American indian hemp
- Doll's-eyes; White baneberry
- Dotted hawthorn
- Doubtful mouse-ear chickweed
- Douglas-fir; Oregon pine
- Downy arrowwood
- Downy arrowwood; Soft-leaved arrow-wood
- Downy cinquefoil
- Downy corymbose dewberry; Short-stalked dewberry
- Downy false foxglove
- Downy gentian
- Downy green sedge; Swan's sedge
- Downy hawthorn
- Downy hawthorn
- Downy hawthorn
- Downy lens grass
- Downy lobelia
- Downy mock orange
- Downy phlox
- Downy racemose dewberry; Seedy blackberry
- Downy skullcap
- Downy solomon's seal; Hairy solomon's-seal
- Downy sunflower
- Downy wafer ash
- Downy willow herb
- Downy yellow violet
- Downy yellow violet
- Dragon's mouth; Arethusa
- Drooping woodreed
- Drumheads
- Drummond's aster
- Drummond's aster
- Drummond's aster
- Drummond's half-chaff sedge
- Drummond's red maple
- Drummond's rock cress
- Drummond's rock cress
- Dudley's rush
- Dune goldenrod; Sticky goldenrod
- Dune sand cherry
- Dune thistle
- Dune willow; Heart-leaved willow
- Dutchman's breeches
- Dutchman's pipe; Woolly dutchman's-pipe
- Dwarf bindweed
- Dwarf bindweed; Low bindweed
- Dwarf birch
- Dwarf bird's-eye speedwell; Wayside speedwell
- Dwarf bracted sedge; Leavenworth's sedge
- Dwarf bur reed; Green-fruited burr-reed
- Dwarf chinkapin oak
- Dwarf crested iris
- Dwarf ginseng
- Dwarf grape fern; Least moonwort
- Dwarf grass pink orchid; Oklahoma grass-pink
- Dwarf hackberry
- Dwarf honeysuckle; Northern bush-honeysuckle
- Dwarf iris
- Dwarf larkspur
- Dwarf mallow; Low mallow
- Dwarf plantain
- Dwarf raspberry
- Dwarf snapdragon
- Dwarf sumac; Winged sumac
E
95 plants
- Eared cress
- Eared false foxglove
- Early buttercup
- Early coral root
- Early cudweed
- Early dark-green bulrush; Mosquito bulrush
- Early fen sedge; Crawe's sedge
- Early figwort; Lance-leaved figwort
- Early goldenrod
- Early horse gentian
- Early horse gentian
- Early horse gentian
- Early horse gentian
- Early ladies' tresses; Shining ladies' tresses
- Early low blueberry; Narrow-leaved low blueberry
- Early meadow rue
- Early oak sedge; Parasol sedge
- Early saxifrage
- Early white-haired panic grass; Egg-leaf rosette grass
- Early wild rose; Smooth rose
- Early winter cress
- Early-leaved brome
- Earthnut vetchling
- Eastern blue-eyed grass
- Eastern cottonwood
- Eastern cottonwood
- Eastern cottonwood
- Eastern hay-scented fern, Hay-scented fern
- Eastern manna grass
- Eastern milk-pea
- Eastern ninebark
- Eastern poison ivy
- Eastern poison ivy, Common poison ivy, Poison ivy
- Eastern prickly pear
- Eastern prickly pear
- Eastern red cedar
- Eastern red cedar
- Eastern redbud
- Eastern redbud
- Eastern sand cherry
- Eastern sea rocket; American sea rocket
- Eastern shooting star
- Eastern trailing tick trefoil
- Eastern wahoo; Eastern burning-bush
- Ebinger's wild rye
- Ebony spleenwort
- Ecotone blackberry
- Eel grass; American eel-grass
- Eggleston's violet; Glade violet
- Elecampane
- Elephant's foot
- Elliot's broom sedge; Elliot beardgrass
- Elliot's broom sedge; Elliot beardgrass
- Elliott's broom sedge
- Elliptic-leaved blackberry; Oldfield blackberry
- Elm-leaved goldenrod
- Elm-leaved goldenrod
- Engelmann's quillwort; Appalachian quilwort
- Engelmann's spike rush
- Engleman's verbena
- English daisy
- English ivy
- English plantain
- Entire-leaved rosinweed
- Erect knotweed
- Erect primrose willow; Wing-stemmed primrose willow
- European bellflower
- European bird cherry
- European columbine
- European corn salad
- European elderberry
- European gooseberry
- European gromwell; Common gromwell
- European high-bush cranberry
- European honeysuckle
- European Lady's-thumb
- European lake sedge; Lesser pond sedge
- European meadowsweet; Queen-of-the-meadow
- European mountain ash
- European smoketree
- European spindletree
- European sweet flag; One-veined sweet flag
- European verbena
- European vervain
- European water clover
- European water horehound; European bugleweed
- European water milfoil
- European weeping birch
- European white birch
- Evening campion
- Evening primrose; Stemless evening-primrose
- Everlasting pea
- Expressway aster
- Expressway aster
- Expressway sedge; Clustered field sedge
F
184 plants
- Fairground grass
- Fairy wand; Devil's-bit
- Fall coral root
- Fall coral root; Autumn coralroot
- Fall coral root; Autumn coralroot
- Fall dandelion
- Fall panicum
- Fall panicum
- Fall panicum
- Fall witch grass; Carolina crab grass
- False aloe; Virginia tube rose
- False arrow feather; Red three-awn
- False aster
- False aster
- False bluecurls
- False boneset
- False boneset
- False bonset
- False bristly sedge; Cypress-like sedge
- False bugbane
- False bugbane; Carolina tassle-rue
- False dandelion
- False foxglove
- False foxtail; False timothy
- False golden ragwort; Western heart-leaved ragwort
- False golden ragwort; Western heart-leaved ragwort
- False golden sedge; Elk sedge
- False grass sedge; Shy sedge
- False gray sedge; Eastern narrow-leaved sedge
- False green flat sedge; Marsh flat-sedge
- False heather; Woolly sand-heather
- False hellebore; Wood's bunchflower
- False indigo bush
- False loosetrife; Cylindric-fruited primrose willow
- False loosetrife; Many-fruited primrose willow
- False melic grass
- False mermaid weed
- False mermaidweed; Marsh mermaidweed
- False mermaidweed; Marsh mermaidweed
- False mermaidweed; Marsh mermaidweed
- False nettle; Small-spiked false nettle
- False pimpernel; Yellow-seeded flase pimpernell
- False rue anemone
- False rusty nut sedge
- False sunflower
- False sunflower
- False sunflower
- False white-haired panic grass; Egg-leaf rosette grass
- False wild stonecrop; Two-rowed stonecrop
- False woolly ragwort
- False-spiraea
- Fame flower; Prairie fame-flower
- Far-eastern smartweed
- Farkleberry
- Fat-hen saltbush; Lance-leaved orach
- Feather windmill grass
- Featherbells; Eastern featherbells
- Featherfoil
- Feathery false solomon seal
- Feathery false solomon seal; Feathery solomon's-plume
- Fen betony; Swamp lousewort
- Fen panicled sedge; Prairie sedge
- Fen star sedge
- Fen thistle; Swamp thistle
- Fen willow herb
- Fern pondweed
- Fern-leaf verbena
- Fern-leaved yarrow
- Fern-leaved yellow false foxglove
- Fern-leaved yellow false foxglove
- Fern-leaved yellow false foxglove
- Fescue oval sedge
- Fetid marigold
- Fetid pepper grass
- Feverfew
- Few-flowered bog sedge
- Few-flowered nut rush
- Few-flowered nut rush
- Few-flowered nut rush
- Few-flowered panic grass; Heller's rosette grass
- Few-flowered spike rush
- Few-flowered tick trefoil
- Few-fruited gray sedge; Rich-woods sedge
- Few-nerved wood sedge
- Field bindweed
- Field cress; Field pepper grass
- Field dodder
- Field garlic
- Field hawkweed
- Field hedge parsley
- Field milkwort
- Field nut sedge; Chufa
- Field oval sedge; Troublesome sedge
- Field penny cress
- Field pumpkin
- Field sorrel
- Field thistle; Canadian thistle
- Field-mouse-ear chickweed
- Fine-leaved sheep fescue
- Finger speedwell
- Fireberry hawthorn
- Fireberry hawthorn
- Fireweed
- Fireweed; Narrow-leaved fireweed
- Firewheels
- Five leaves; Large whorled-pogonia
- Five-leaved aralia
- Flat pea
- Flat-leaved bladderwort
- Flat-Sedge, Midland Sand
- Flat-spiked gray sedge
- Flat-stemmed pondweed
- Flat-stemmed spike rush
- Flat-stemmed spike rush
- Flat-top aster
- Flax-leaved aster
- Fleshy hawthorn
- Fleshy hawthorn
- Fleshy hawthorn
- Flixweed
- Floating bladderwort; Small swollen bladderwort
- Floating bur reed; Small burr-reed
- Floating manna grass
- Floating marsh pennywort
- Florida crown grass
- Flower-of-an-hour
- Flowering dogwood
- Flowering rush
- Flowering spurge
- Flowering wintergreen; Gaywings
- Fluellin; Sharp-leaved cancerwort
- Fly honeysuckle
- Fly honeysuckle
- Fly honeysuckle; Yellow downy fly-honeysuckle
- Fogg's goosefoot
- Follicle sedge; Northern long sedge
- Fool's parsley
- Forbes' saxifrage
- Forked aster
- Forked catchfly
- Forked catchfly
- Forked duckweed
- Forked panic grass; Cypress rosette grass
- Forked-tip three-awn grass
- Four o'clock
- Four o'clock
- Four-angled rose gentian; Slender rose-gentian
- Four-leaf wild yam
- Four-rowed bead grass
- Four-rowed bead grass
- Four-seeded vetch; Lentil vetch
- Fowl blue grass
- Fowl manna grass
- Fox grape
- Foxglove beard tongue
- Foxtail
- Foxtail millet
- Foxtail mint
- Foxtail prairie clover
- Foxtail; Short-awn foxtail
- Fragrant Sumac
- Fragrant water lily
- Fragrant water lily
- Fragrant water lily
- Fraser's St. John's wort; Fraser's marsh St.John's-wort
- Free pink; Fire pink
- Freeman's maple
- French grass
- French rose
- French's shooting star
- Fries's pondweed; Flat-stalked pondweed
- Fringed bindweed
- Fringed brome
- Fringed gentian
- Fringed loosestrife
- Fringed puccoon; Narrow-leaved puccoon
- Fringed sedge
- Fringed sedge
- Frog's bit
- Frost grape
- Frosted Hawthorn
- Frostweed
- Fuller's bristly dewberry
- Fumitory
G
163 plants
- Gama grass
- Garden annual stonecrop
- Garden asparagus
- Garden balsam
- Garden bleeding hearts
- Garden bleeding-hearts
- Garden chamomile
- Garden cosmos
- Garden dewberry
- Garden garlic
- Garden heliotrope
- Garden lettuce
- Garden loosestrife
- Garden onion
- Garden orach
- Garden petunia
- Garden petunia; Hybrid garden petunia
- Garden phlox; Fall phlox
- Garden pink
- Garden snowberry
- Garden vetch
- Garden vetch
- Garlic
- Garlic mustard
- Gattinger's hawthorn
- Gattinger's panicgrass
- German chamomile
- German iris
- Germander speedwell
- Geyer's spurge
- Giant cane; Southern cane
- Giant chickweed
- Giant foxtail grass
- Giant green foxtail grass
- Giant hogweed
- Giant ragweed; Great ragweed
- Giant reed
- Giant sunflower
- Giant sunflower
- Ginseng; American ginseng
- Glade fern; Narrow-leaved glade-fern
- Glade fern; Narrow-leaved glade-fern
- Glade mallow
- Glaucous campion
- Glaucous tick trefoil; Smooth tick-trefoil
- Glaucous white lettuce
- Globe beak rush
- Globe-fruited primrose loosestrife
- Globose water meal; Common watermeal
- Glossy buckthorn
- Glove beak rush; Globe beak-rush
- Goat willow
- Goat's rue
- Goat's-beard
- Goat's-beard
- Gold-of-pleasure; Large-seeded false
- Golden alexanders
- Golden aster; Lemon yellow false golden aster
- Golden bell
- Golden cassia
- Golden cassia; Large-flowered partridge pea
- Golden cattail sedge
- Golden chamomile
- Golden coreopsis; Golden tickseed
- Golden ragwort; Heart-leaved golden ragwort
- Golden rain tree
- Golden saxifrage
- Golden seal
- Golden sedge; Golden-fruited sedge
- Golden St. John's wort
- Golden-seeded spike rush; Elliptic spike-rush
- Goldie fern; Goldie's wood-fern
- Goldthread
- Goose-foot cornsalad
- Goose-neck loosestrife
- Goutweed; Bishop's goutweed
- Graham's rock cress
- Grainless field sorrel
- Grand hawthorn
- Grape honeysuckle
- Grass beak rush
- Grass pink orchid; Tuberous grass-pink
- Grass pink orchid; Tuberous grass-pink
- Grass sedge; James's sedge
- Grass-leaved arrowhead
- Grass-leaved goldenrod; Common flat-topped goldenrod
- Grass-leaved orach; Entire-leaved orach
- Grass-leaved pondweed
- Grass-leaved rush
- Grass-of-parnassus
- Gray beak rush; Brown beak-rush
- Gray birch
- Gray bog sedge; Hoary sedge
- Gray dogwood
- Gray germander; American germander
- Gray goldenrod
- Gray goldenrod
- Gray mouse-ear chickweed
- Gray poplar
- Gray willow
- Gray-barked grape
- Gray-barked grape
- Gray's polypody; Resurrection-fern
- Graybark grape
- Grayish evening primrose
- Great angelica; Purple-stemmed angelica
- Great blue lobelia
- Great blue lobelia
- Great bulrush; Soft-stemmed club-bulrush
- Great burdock
- Great chickweed; Star chickweed
- Great duckweed
- Great fox sedge; Stalk-grained sedge
- Great globe thistle
- Great indian plantain
- Great lakes corn salad; Goose-foot corn-salad
- Great lakes sea rocket; American sea rocket
- Great plains flat sedge
- Great plains ladies' tresses
- Great spike rush; Common spike-rush
- Great St. John's wort
- Great tickseed; Forrest tickseed
- Great water dock
- Great waterleaf; Appendaged waterleaf
- Great white lettuce
- Great yellow wood sorrel
- Greater chickweed
- Greater hop sedge; Large sedge
- Greater marsh bellflower
- Greater nodding fescue; Short's fescue
- Grecian foxglove
- Green adder's mouth
- Green amaranth
- Green ash
- Green brier; Glacous-leaved greenbrier
- Green bristlegrass
- Green dragon
- Green field speedwell
- Green foxtail grass
- Green fringed orchid
- Green hawthorn
- Green hawthorn
- Green milkweed; Green-flowered milkweed
- Green shinleaf
- Green thread
- Green twayblade; Lossel's twayblade
- Green violet
- Green yellow sedge
- Green-flowered milkweed; Short green milkweed
- Green-flowered tick trefoil; Velvet-leaved tick-trefoil
- Green-headed fox sedge; Soft fox sedge
- Greene's rush
- Greenish yellow sedge, Little green sedge
- Greenstar sedge
- Grooved yellow flax
- Grooved yellow flax
- Ground cedar
- Ground ivy; Gill-over-the-ground
- Ground nut; American groundnut
- Ground pine; Flat-branched tree club moss
- Ground pine; Flat-branched tree club moss
- Grove blue grass
- Gum plant; Curly-cupped gumweed
H
196 plants
- Haberer’s ground cedar
- Hackberry
- Hair beak rush; Needle beak-rush
- Hair bladderwort; Zigzag bladderwort
- Hair grass
- Hair grass; Ticklegrass
- Hair sedge; Dense-tufted hair-sedge
- Hair spike rush; Small-fruited spike-rush
- Hair star sedge; Howe's star sedge
- Hairy aster
- Hairy beard tongue
- Hairy bedstraw
- Hairy bedstraw
- Hairy bitter cress
- Hairy bracted tick trefoil; Large-bracted tick-trefoil
- Hairy brome; Hairy chess
- Hairy bush clover
- Hairy bushclover
- Hairy buttercup; Sardinia buttercup
- Hairy crab grass
- Hairy cupgrass
- Hairy false golden aster; Lemon yellow false golden aster
- Hairy fimbry
- Hairy forked nailwort
- Hairy gentian
- Hairy gray sedge; Hitchcock's sedge
- Hairy green sedge; Fuzzy-wuzzy sedge
- Hairy ground cherry; Downy ground cherry
- Hairy hawkweed
- Hairy hedge nettle
- Hairy lens grass
- Hairy lip fern
- Hairy lip fern, Woolly lip fern
- Hairy marsh yellow cress; Common yellow cress
- Hairy meadow parsnip
- Hairy nightshade
- Hairy nightshade
- Hairy pinweed
- Hairy puccoon
- Hairy rock cress
- Hairy rock cress
- Hairy rock cress
- Hairy rock cress
- Hairy rock cress
- Hairy rose mallow
- Hairy ruellia; Sessile-leaved hairy ruellia
- Hairy skullcap
- Hairy skullcap
- Hairy skullcap
- Hairy small-leaved tick trefoil
- Hairy spurge
- Hairy sweet cicely
- Hairy tick trefoil
- Hairy veiny vetchling
- Hairy white goldenrod
- Hairy white oldfield aster
- Hairy wild lettuce
- Hairy wild rye
- Hairy willow herb
- Hairy willow herb
- Hairy wood rush
- Hairy wood rush
- Hairy wood sedge; Pubescent sedge
- Hairy-fruited lake sedge
- Hairy-leaved dewberry
- Hairy-leaved lake sedge; Awned sedge
- Hairy-seeded nut rush; Muehlenberg's nut-rush
- Halberd-leaved orach
- Halberd-leaved rose mallow
- Halbred-leaved tear-thumb
- Hall's tufted bulrush
- Handsome harry; Wing-stemmed meadow-beauty
- Harbinger-of-spring
- Hard fescue
- Hard-stemmed bulrush
- Hard-stemmed bulrush
- Hardhack
- Hardy rubber-tree
- Hare's-ear mustard
- Harebell
- Harger's goldenrod
- Harvey's buttercup
- Hashish; Indian hemp
- Hawk's beard
- Hawk's beard
- Hawkbit
- Hawkins's oak
- Hawkins's oak
- Hawkseed mustard
- Hawkweed oxtongue
- Hawthorn
- Hawthorn-of-the-hills
- Hawthorn-of-the-hills; Hillside hawthorn
- Hazel dodder
- Heart-leaved aster
- Heart-leaved birch, Mountain paper birch
- Heart-leaved hedge nettle
- Heart-leaved meadow parsnip; Heart-leaved golden alexanders
- Heart-leaved plantain
- Heart-leaved skullcap
- Heart-leaved skullcap
- Heart-leaved violet
- Heart-leaved willow; Missouri willow
- Heart-podded hoary cress
- Heath aster
- Heath aster
- Hedge apple; Osage-orange
- Hedge maple
- Hedge mustard; Common hedge mustard
- Hedgehog club rush; Globe flat-sedge
- Helleborine orchid
- Helleborine orchid
- Heller's old-field balsam
- Hemlock
- Hemlock panic grass; Hemlock rosette grass
- Hemlock parsley
- Hen-and-chickens
- Henbit
- Herb robert
- Herb robert
- Hickey's clubmoss
- Hickey's clubmoss
- High mallow
- High-bush cranberry; American highbrush-cranberry
- Highbush blackberry
- Highbush blackberry; Saw-toothed blackberry
- Highbush blueberry
- Highbush cranberry
- Highland doghobble
- Hill's oak; Northern pin oak
- Hill's thistle
- Hill's thistle
- Hillside strawberry; Woodland strawberry
- Himalaya blackberry
- Hirsute sedge
- Hispid swamp buttercup
- Hoary alyssum
- Hoary beard tongue; Eastern gray beardtongue
- Hoary cinquefoil; Ashy cinquefoil
- Hoary cress
- Hoary fogfruit
- Hoary mountain mint
- Hoary puccoon
- Hoary sedge
- Hoary sedge
- Hoary tick trefoil
- Hoary vervain
- Hoary willow; Sage willow
- Hobblebush
- Hog peanut; American hog peanut
- Hogwort
- Hogwort; Woolly croton
- Hollow joe pye weed; Purple-stemmed joe-pye-weed
- Holly-leaved barberry
- Holly-leaved naiad
- Hollyhock
- Holm's hawthorn
- Honesty
- Honewort
- Honey locust
- Honeyweed
- Hooded ladies' tresses
- Hooked buttercup
- Hooked buttercup
- Hooked monkshood; Southern blue monkshood
- Hooker's orchid
- Hop hornbeam; Ironwood
- Horned beak rush
- Horned bladderwort
- Horned pondweed; American horned-pondweed
- Horse chestnut
- Horse nettle
- Horse nettle
- Horse radish
- Horsemint
- Horsetail milkweed; Whorled milkweed
- Horsetail spike rush
- Horseweed
- Humped bladderwort
- Hungarian brome; Smooth brome
- Hungarian speedwell
- Hybrid alfalfa
- Hybrid alpine rush
- Hybrid black willow
- Hybrid cattail
- Hybrid crack willow
- Hybrid dward birch
- Hybrid elm
- Hybrid fly honeysuckle
- Hybrid pussy willow
- Hybrid sumac
- Hyssop hedge nettle; Hyssop-leaved hedge-nettle
- Hyssop loosestrife
- Hyssop-leaved boneset
- Hyssop-leaved boneset
- Hyssop-leaved boneset
I
38 plants
- Ice cream grass; Sand love grass
- Ill-scented trillium
- Illinois bundle flower
- Illinois carrion flower
- Illinois hawthorn
- Illinois pondweed
- Illinois rose; Climbing prairie rose
- Illinois tick trefoil
- Illinois wood sorrel
- India lovegrass
- Indian balsam; Ornamental jewelweed
- Indian cucumber root
- Indian grass
- Indian heliotrope
- Indian hemp; Prairie indian hemp
- Indian mustard
- Indian paintbrush
- Indian physic
- Indian pink; Woodland pinkroot
- Indian pipe; One-flowered indian-pipe
- Indian strawberry
- Indian tobacco
- Indian turnip; Jack-in-the-pulpit
- Indian wood oats; Broadleaf uniola
- Indiana dewberry
- Inland meadow beauty; Maryland meadow-beauty
- Inland new jersey tea; Prairie redroot
- Inland rush
- Interior horned beak rush; Short-bristled beak-rush
- Intermediate dogbane
- Interrupted fern
- Iowa crab; Prairie crabapple
- Italian rye grass
- Itch-grass
- Ithaca blackberry
- Ivory sedge; Ebony sedge
- Ivy-leaved morning glory
- Ivy-leaved speedwell
J
45 plants
- Jack oak; Shingle oak
- Jack pine
- Jack's poplar
- Jacob's ladder
- Jacob's ladder; Greek valerian
- Jagged chickweed
- Jagged chickweed
- James's clammyweed
- Japanese barberry
- Japanese bindweed
- Japanese chaff flower
- Japanese chess
- Japanese hedge parsley
- Japanese honeysuckle
- Japanese hops
- Japanese juniper
- Japanese knotweed
- Japanese knotweed
- Japanese lawn grass
- Japanese lespedeza; Japanese annual-bushclover
- Japanese mazus
- Japanese meadowsweet
- Japanese raspberry; Australian raspberry
- Japanese rose
- Japanese rose; Multiflora rose
- Japanese snowball bush
- Japanese spindle tree
- Japanese spindle tree; Hamilton's strawberry-bush
- Japanese spurge
- Japanese tree lilac
- Japanese wisteria
- Java water dropwort
- Jerusalem artichoke
- Jerusalem oak
- Jetbead
- Jimsonweed
- Johnny-jump-up
- Johnson grass
- Joint rush; Knotted rush
- Jointed goat grass
- Jointed rush
- Jointweed
- Joliet horsetail; Ferriss's horsetail
- June grass
- Juneberry; Downy serviceberry
K
22 plants
- Kalm's St. John's wort
- Kankakee mallow
- Kansas arrowhead
- Kansas mugmort
- Kellogg's hawthorn
- Kellogg's hawthorn
- Kenilworth ivy
- Kentucky blue grass
- Kentucky blue grass
- Kentucky coffee tree
- Kentucky spleenwort
- King devil; Glaucous hawkweek
- Kiss-me-over-the-garden-gate; Prince's-feather
- Kiss-Me-Quick
- Kitten-tails
- Knawel
- Knee spike rush; Capitate spike-rush
- Knobbed hop sedge; False hop sedge
- Knotweed dodder; Smartweed dodder
- Korean clover; Korean annual-bushclover
- Kral's sedge
- Kudzu
L
187 plants
- Lace grass
- Lady fern; Northern lady fern
- Lake cress
- Lake shore rush
- Lake shore rush; Baltic rush
- Lamb's quarters
- Lamb's quarters
- Lance-fruited oval sedge
- Lance-fruited oval sedge
- Lance-leaved buckthorn
- Lance-leaved buckthorn
- Lance-leaved ground cherry
- Lance-leaved loosestrife
- Lance-leaved violet
- Lance-leaved wild licorice
- Lanceleaf ragweed
- Large butter-and-eggs
- Large buttonweed
- Large Cottonweed, Plains Snake Cotton
- Large cranberry
- Large houstonia; Large bluet
- Large houstonia; Large bluet
- Large houstonia; Large bluet
- Large marsh St. John's wort; Lesser marsh St. John's-wort
- Large passion flower; Purple passion flower
- Large plantain-leaved pussytoes
- Large plantain-leaved pussytoes
- Large plantain-leaved pussytoes
- Large poverty rush
- Large seeded dodder
- Large seeded dodder
- Large water starwort
- Large water starwort
- Large white trillium
- Large yellow fox sedge; Yellow-fruited sedge
- Large yellow lady's slipper
- Large yellow sedge
- Large yellow vetch
- Large-flower bellwort
- Large-flowered baby-blue-eyes
- Large-flowered beard tongue
- Large-flowered blanket flower
- Large-flowered coreopsis; Large-flowered tickseed
- Large-flowered evening primrose
- Large-flowered periwinkle; Large-flowered myrtle
- Large-flowered water plantain; Northern water plantain
- Large-flowered yellow loosestrife
- Large-fruited star sedge
- Large-fruited star sedge; Little prickly sedge
- Large-leaf waterleaf
- Large-leaved phlox; Wide-leaved phlox
- Large-leaved pondweed
- Large-leaved shinleaf; Elliptical-leaved shinleaf
- Large-leaved storax; Large-leaved snowbell
- Large-whorled mallow
- Late alumroot; Small-flowered alumroot
- Late alumroot; Small-flowered alumroot
- Late alumroot; Small-flowered alumroot
- Late boneset
- Late figwort
- Late goldenrod
- Late horse gentian; Clasping-leaved horse-gentian
- Late low blueberry; Pale low blueberry
- Late meadow rue; Tall meadow-rue
- Late purple aster
- Late purple aster
- Lawn prunella; Common selfheal
- Lawn water pennywort
- Lead plant
- Lead-colored stiff sedge; Livid sedge
- Leafy phacelia; Loose-flowered phacelia
- Leafy pondweed
- Leafy pondweed
- Leafy satin grass
- Leafy satin grass
- Leafy white orchis; Leafy white bog-orchid
- Leafy wool grass
- Leafy-stemmed plantain
- Least duckweed; Minute duckweed
- Leather flower
- Leatherflower; Thin-leaved leatherflower
- Leatherleaf
- Leatherleaf viburnum
- Leatherwood
- Leathery grape-fern
- Leconte's violet, Sand violet
- Leek sedge; Drooping sedge
- Leggett's pinweed
- Lemon day lily; Yellow day lily
- Lemon mint; Orange mint; Bergamot Mint
- Lemon yellow false golden aster
- Lentil
- Lesquereaux's mustard
- Lesser celandine
- Lesser celandine
- Lesser fringed gentian
- Lesser hawkbit
- Lesser love grass
- Lesser quickweed
- Lesser salt spurrey; Salt-marsh sand-spurrey
- Lesser wild basil
- Lesser yellow lady's slipper
- Licorice bedstraw
- Licorice bedstraw
- Licorice milk vetch
- Lilac chaste-tree
- Lilac sage
- Lilac; Common lilac
- Lily-of-the-valley
- Lily-of-the-valley
- Limber honeysuckle
- Linden arrow-wood
- Linear-Leaf candy-clower
- Lined sedge
- Lineless squill; Common blue squill
- Lion's foot
- Lion's tail
- Little barley
- Little bluestem grass
- Little bluestem grass
- Little bur-head; Dwarf bur-head; Mudbabies
- Little hop clover
- Little ladies' tresses
- Little-leaf buttercup; Kidney-leaved buttercup
- Little-leaved mint
- Live-forever; Witch's-moneybags
- Lizard's tail; American lizard's-tail
- Lobed tickseed
- Log fern
- Lombardy poplar
- Long-awned bracted sedge; Heavy sedge
- Long-awned wood grass; Bearded shorthusk
- Long-beaked bald rush
- Long-beaked sedge
- Long-bearded hawkweed
- Long-bracted spidewort; Sticky spiderwort
- Long-bracted tussock sedge; Leafy tussock sedge
- Long-flowered gaura
- Long-flowered tobacco
- Long-fruited oval sedge; Greenish white sedge
- Long-headed coneflower
- Long-headed poppy; Garden poppy
- Long-leaved ammannia; Scarlet toothcup
- Long-leaved bluets
- Long-leaved bushclover
- Long-leaved ground cherry
- Long-leaved ground cherry
- Long-leaved panic grass
- Long-leaved speedwell
- Long-leaved starwort
- Long-petioled showy goldenrod
- Long-scaled green sedge; Bush's sedge
- Long-scaled manna grass; Creeping manna grass
- Long-scaled nut sedge; Straw-colored flat-sedge
- Long-scaled tussock sedge; Cloud sedge
- Long-spurred violet
- Long-stalked cranesbill
- Long-stalked hummock sedge
- Long-stalked hummock sedge
- Long-stalked panic grass
- Long-stalked starwort
- Long-stoloned oak sedge
- Long's blackberry
- Long's oval sedge
- Longbract wild indigo
- Longbract wild indigo
- Loogootee dewberry
- Loomis's mountain mint
- Loose-flowered panic grass; Open flowered rosette grass
- Loose-flowered swampcandle
- Loose-headed bracted sedge; Burr-reed sedge
- Loose-headed oval sedge; Necklace sedge
- Loosestrife; Mississippi valley loosetrife
- Lopseed; American lopseed
- Louisiana blackberry
- Louisiana unicorn-plant; Ram's-horn: Devil's-claw
- Lovage
- Love-in-a-mist
- Love-lies-bleeding; Red amaranth
- Low calamint
- Low cudweed
- Low forked chickweed
- Low hop clover; Pinnate hop clover
- Low nut rush
- Lucretia dewberry
- Lyme grass
- Lyre-leaved rock cress; Cress sand
M
123 plants
- Mackay's fragile fern; Mackay's brittle fern, Slender fragile fern, Upland brittle bladder fern
- Macoun's false bindweed
- Mad-dog skullcap
- Magarette's hawthorn
- Magarette's hawthorn
- Maiden-blue-eyed Mary
- Maidenhair fern; Northern maidenhair fern
- Maidenhair spleenwort
- Maidenhair spleenwort
- Maidenhair tree
- Malte's violet
- Maltese cross
- Manchurian honeysuckle
- Many-bracted burr marigold
- Maple-leaved arrowwood
- Maple-leaved goosefoot
- Mare's tail
- Margaret's hawthorn
- Margaret's hawthorn
- Marginal shield fern; Marginal wood-fern
- Marguerite’s clubmoss
- Marsh bellflower
- Marsh blazing star
- Marsh blue grass
- Marsh blue violet
- Marsh cinquefoil
- Marsh club moss; Meadow spike moss
- Marsh coneflower; Prairie coneflower
- Marsh elder
- Marsh fleabane
- Marsh hedgenettle
- Marsh mallow
- Marsh purslane; Marsh primrose willow
- Marsh shield fern; Eastern marsh-fern
- Marsh skullcap; Hooded skullcap
- Marsh speedwell; Grass-leaved speedwell
- Marsh valerian
- Marsh vetchling
- Marsh wild timothy
- Maryland chestnut
- Maryland senna; Southern wild senna
- Mat sandbur
- Matted spike rush; Intermediate spike-rush
- Maximilian's sunflower
- May apple
- Mead's milkweed
- Mead's stiff sedge
- Meadow anemone; Round-leaved thimbleweed
- Meadow barley
- Meadow barley
- Meadow beauty; Maryland meadow-beauty
- Meadow fescue
- Meadow foxtail
- Meadow geranium
- Meadow willow
- Meadowsweet
- Medicinal agrimony
- Merrybells; Sessile-leaved bellwort
- Mexican love grass
- Mexican prickly poppy
- Miami mist
- Michigan lily
- Midget crab apple
- Midland bracted sedge
- Mild water pepper; False water pepper
- Milk thistle
- Miniature beefsteak plant
- Minor smartweed
- Mississippi arrowhead; Hooded arrowhead; Tidal arrowhead; Arrowleaf
- Mississippi buttercup
- Mississippi milk pea
- Missouri goldenrod
- Missouri gooseberry
- Missouri goosefoot
- Missouri gourd
- Missouri ironweed
- Missouri oval sedge
- Missouri rock cress
- Missouri small skullcap; Southern skullcap
- Missouri violet
- Mistflower
- Mistletoe
- Moccasin flower; Pink lady's-slipper
- Mock strawberry
- Mockernut hickory
- Monarda; Eastern bee-balm
- Moneywort
- Monkey flower
- Monkey flower; Allegheny monkey-flower
- Moonseed
- Moosewood; Striped maple; Whistlewood
- Morrow's honeysuckle
- Moss phlox
- Moss phlox; Rock Pink; Creeping phlox
- Moss rose
- Mossy stonecrop
- Moth mullein
- Mother-of-thyme
- Motherwort
- Motherwort
- Mountain blue-eyed grass
- Mountain chestnut oak
- Mountain holly; Catberry
- Mountain laurel
- Mountain mint; Southern mountain-mint
- Mountain phlox
- Mountain spleenwort
- Mountain winter aconite
- Mouse-eared cress
- Mouse-eared whitlow cress; Early whitelow grass
- Mousetail
- Mousetail fescue
- Mt. Albert goldenrod
- Muck sedge
- Mud plantain; Kidney-leaved mud-plaintain
- Muehlenberg's sedge
- Mugwort
- Mulberry weed
- Mullein foxglove
- Munro grass
- Muscadine grape
- Musk bristle thistle; Nodding plumeless thistle
- Musk mallow
N
120 plants
- Naked-fruited lamb's quarters; Naked-fruited goosefoot
- Nannyberry
- Narrow melic grass
- Narrow-fruited pinweed; Illinois pinweed
- Narrow-leaved bluecurls
- Narrow-leaved bluets
- Narrow-leaved cattail
- Narrow-leaved cattail sedge; Squarrose sedge
- Narrow-leaved cotton grass
- Narrow-leaved cotton grass; Tall cotton grass
- Narrow-leaved cow wheat; American cow-wheat
- Narrow-leaved daisy fleabane
- Narrow-leaved evening primrose
- Narrow-leaved false gaura
- Narrow-leaved hawk's beard
- Narrow-leaved knotweed
- Narrow-leaved knotweed
- Narrow-leaved leafy spurge
- Narrow-leaved loosestrife; Whorled yellow loosestrife
- Narrow-leaved marsh elder
- Narrow-leaved oval sedge; Awl-fruited oval sedge
- Narrow-leaved pinweed
- Narrow-leaved purple coneflower
- Narrow-leaved showy goldenrod
- Narrow-leaved small pondweed
- Narrow-leaved summer bluets
- Narrow-leaved sundew; Spoon-leaved sundew
- Narrow-leaved sunflower; Swamp sunflower
- Narrow-leaved umbrellawort
- Narrow-leaved umbrellawort
- Narrow-leaved venus's looking glass
- Narrow-leaved vervain
- Narrow-leaved vetch; Garden vetch
- Narrow-leaved white-top aster
- Narrow-leaved wild rice
- Narrow-leaved wood sedge
- Narrow-leaved wood sedge; Slender woodland sedge
- Narrow-leaved woolly sedge; Woolly-fruited sedge
- Narrow-leaved woolly sedge; Woolly-fruited sedge
- Narrow-racemed blackberry
- Needle and thread
- Needle spike rush
- Needle-and-thread grass
- Needle-leaved pincushion-plant
- Needles spike rush
- Nelson's horsetail; Nelson's scouring-rush
- Nepalese browntop
- Nerved sand bracted sedge; Muehlenberg's sedge
- Nerveless sand bracted sedge; Muehlenberg's sedge
- Netted chain fern
- Netted nut rush
- Nettle-leaved goosefoot
- New england aster
- New jersey tea
- New Mexico locust
- New York aster
- New York aster
- New york fern
- Night-flowering catchfly
- Nimblewill
- Nippled water meal; Pointed watermeal
- Nits-and-lice
- Nodding brome
- Nodding bur marigold
- Nodding chickweed
- Nodding chickweed
- Nodding evening primrose
- Nodding fescue
- Nodding ladies' tresses
- Nodding pogonia, Nodding threebirds
- Nodding pogonia; Nodding threebirds
- Nodding spurge; Erect mat-spurge; Eyebane
- Nodding star-of-bethlehem
- Nodding trillium
- Nodding wild onion
- Nonesuch daffodil
- Northeastern smartweed
- Northern adder's tongue fern
- Northern appressed bog clubmoss
- Northern bayberry
- Northern bedstraw
- Northern bitter cress; Purple spring cress
- Northern bog violet; Blue prairie violet
- Northern bracken fern, Western bracken fern, Bracken fern
- Northern bracken fern, Western bracken fern, Bracken fern, Tailed bracken
- Northern cranesbill; Bicknell's northern crane's-bill
- Northern dropseed
- Northern fogfruit
- Northern gooseberry; Hairy-stemmed gooseberry
- Northern green orchid
- Northern green orchid
- Northern green orchid
- Northern manna grass
- Northern panic grass; Northern rosette grass
- Northern pitcher plant
- Northern prairie phlox; Downy phlox
- Northern red currant
- Northern red oak
- Northern rush grass
- Northern sedge; Black sedge
- Northern slender ladies' tresses
- Northern spicebush
- Northern St. John's-wort
- Northern St. John's-Wort
- Northern sweetgrass
- Northern tubercled orchid
- Northern weak sedge; White-edged sedge
- Northern wild comfrey
- Northern wild-raisin
- Northern wildrice
- Northern wildrice
- Norway maple
- Norway spruce
- Notched spike rush
- Nothern bugle weed
- Nothern bugle weed
- Nottoway valley brome
- Nuttall's bushclover
- Nuttall's poverty weed
- Nuttall's tick trefoil
O
47 plants
- Oak-leaved goosefoot
- Oak-leaved hydrangea
- Oak-leaved privet
- Oake's pondweed
- Oakes's evening primrose
- Oats
- Obe-wan-conobea; Narrow-leaved paleseed
- Obovate beak grass
- Ohio buckeye
- Ohio goldenrod
- Ohio horse mint; Downy wood-mint
- Oklahoma bracted sedge
- Old plainsman
- Old witch grass
- Old witch grass
- Old-fashioned wigela
- Old-field balsam
- Old-field goldenrod
- Old-field panic grass; Tapered rosette grass
- Old-woman
- One-flowered leavenworthia; Michaux's leavenworthia
- One-rowed yellowcress
- One-sided shinleaf; Sidebells
- Oneseed hawthorn
- Ontario aster
- Opposite-leaved dwarf dandelion
- Orange coneflower
- Orange coneflower
- Orange coneflower
- Orange day lily
- Orange fringed orchid
- Orange grass
- Orange-eyed butterfly bush
- Orchard grass
- Oregano
- Oregon holly grape
- Oriental bittersweet
- Oriental poppy
- Ostrich fern
- Ostrich fern
- Oval ladies' tresses; Small ladies' tresses
- Oval spike rush
- Oval-leaved knotweed
- Overcup oak
- Ox-eye daisy
- Oyster salsify
- Ozark ironweed
P
255 plants
- Pagoda dogweed; Alternate-leaved dogwood
- Painted leaf
- Painted sedge; Boott's sedge
- Pale alyssum; Small alyssum
- Pale avens; Cream-colored avens
- Pale beard tongue
- Pale beardtongue
- Pale corydalis; Short-spurred corydalis
- Pale dock
- Pale dogwood; Blue-fruited dogwood
- Pale duckweed
- Pale false foxglove
- Pale gentian; Yellow gentian
- Pale hickory; Sand hickory
- Pale indian plantain
- Pale leafcup
- Pale manna grass
- Pale narrow-leaved goosefoot
- Pale poppy mallow
- Pale purple coneflower
- Pale sedge; Limestone-meadow sedge
- Pale spike rush
- Pale sunflower; Thin-leaved sunflower
- Pale swallow-wort
- Pale touch-me-not; Yellow jewelweed
- Pale umbrellawort
- Pale vetchling
- Pale-leaved sunflower
- Pale-spiked lobelia
- Pale-spiked lobelia
- Pale-spiked lobelia
- Paleolithic oak
- Panicled aster
- Panicled hawkweed
- Panicled hydrangea
- Panicled screwstem; Twining screwstem
- Panicled tick trefoil
- Panicled tick trefoil
- Paper birch
- Paper mulberry
- Parisian bedstraw; Lamarck's bedstraw
- Parrot's feather
- Partridge berry
- Pasture rose
- Pasture spike-sedge
- Pasture thistle
- Pasture thistle; Field thistle
- Path rush
- Patience dock
- Pawpaw
- Peach
- Peach-leaved willow
- Pear
- Pear; Common pear
- Pearl millet
- Pearl yarrow; Sneezewort
- Pearly everlasting
- Pecan
- Peking cotoneaster
- Pencil flower; Side-beaked pencil-flower
- Pennsylvania bitter cress
- Pennsylvania blackberry
- Pennsylvania oak sedge
- Pennsylvania pellitory
- Pennywort
- Peppermint
- Peppervine
- Peppervine
- Perennial blue flax
- Perennial duckweed
- Perennial foxtail grass
- Perennial honesty
- Perennial rye grass
- Perfoliate bellwort
- Perfoliate pennycress
- Perfumed cherry; Mahaleb cherry
- Perplexing tick trefoil
- Persimmon
- Peruvian daisy; Common quickweed
- Pestilence wort
- Petiolate hairy ruellia
- Petioled sunflower
- Petioled sunflower
- Petty spurge
- Philadelphia fleabane
- Philadelphia panic grass
- Philadelphia panic grass
- Philadelphia panic grass
- Phlox-leaved aster
- Pickerel weed
- Pigeon grass
- Pigeon grass
- Pignut hickory
- Pin cherry; Fire cherry
- Pin oak
- Pine barren flatsedge
- Pineapple weed
- Pinesap; American pinesap
- Pink corydalis; Pink-and-yellow fumewort
- Pink milkwort
- Pink shinleaf
- Pink shinleaf
- Pink thoroughwort
- Pink turtlehead; Rose turtlehead
- Pink valerian; Large-flowered valerian
- Pink-flowered skeleton weed
- Pink-mullein
- Pinkweed; Pennsylvania smartweed
- Pinnatifid spleenwort; Lobed spleenwort
- Pipes; Water horsetail
- Pipewort
- Pipsissewa
- Pipsissewa; Prince's pine
- Pitch pine
- Pitcher plant
- Pitseed goosefoot
- Pitseed goosefoot
- Pitseed goosefoot
- Pitseed goosefoot
- Plain oval sedge; Short-beaked sedge
- Plains blackberry
- Plains blue grass
- Plains three-awn grass
- Plait-leaved dewberry
- Plantain-leaved wood sedge
- Plume grass
- Plume poppy
- Poet's narcissus
- Pointed tick trefoil
- Poison hemlock
- Poison ivy
- Poison sumac
- Poke milkweed
- Pokeweed
- Pokeweed; American pokeweed
- Poor joe; Large-bracted plantain
- Poor man's weatherglass
- Poor man's weatherglass; Scarlet pimpernel
- Poplar-leaved violet
- Porcelain berry
- Porcupine grass
- Porcupine sedge
- Porter's reedgrass
- Porter's violet
- Post oak
- Potato dwarf dandelion
- Poverty brome
- Poverty grass; Church-mouse three-awn
- Poverty oat grass
- Prairie alumroot; Richardson's alumroot
- Prairie blazing star
- Prairie blazing star
- Prairie blue-eyed grass
- Prairie brome; Kalm chess
- Prairie cinquefoil
- Prairie cinquefoil
- Prairie cord grass
- Prairie coreopsis; Stiff tickseed
- Prairie cup grass
- Prairie dock
- Prairie dock
- Prairie dock
- Prairie dodder
- Prairie dodder; Bush-clover dodder
- Prairie gray sedge; Field sedge
- Prairie ground cherry
- Prairie hummock sedge; Richardson's sedge
- Prairie indian plantain
- Prairie lily; Wood lily
- Prairie meadow sage
- Prairie milkweed; Sullivant's milkweed
- Prairie obedient plant
- Prairie panic grass; Leiberg's rosette grass
- Prairie parsley
- Prairie ragwort
- Prairie sand reed
- Prairie sand reed
- Prairie satin grass
- Prairie star sedge; Inland sedge
- Prairie sundrops
- Prairie sunflower
- Prairie sunflower
- Prairie switch grass
- Prairie tea
- Prairie violet
- Prairie wedge grass
- Prairie white fringed orchid
- Prairie willow
- Prairie willow
- Prairie willow
- Prairie willow
- Prairie-rocket wallflower
- Praiseworthy blackberry
- Prarie wedge grass
- Pretty pinweed
- Prickley wild gooseberry; Eastern prickly gooseberry
- Prickly ash; Northern prickly ash
- Prickly currant
- Prickly lettuce
- Prickly quill sedge
- Prickly sedge
- Prickly sida
- Prickly sow thistle
- Primrose peerless
- Primrose-leaved violet
- Princess tree
- Pringle's aster
- Prostrate amaranth; Creeping amaranth
- Prostrate mat-spurge
- Pumpkin ash
- Puncture vine
- Purple avens
- Purple bergamot
- Purple bladderwort
- Purple chokeberry
- Purple chokeberry
- Purple chokeberry
- Purple cliff brake; Purple-stemmed cliffbrake
- Purple crownvetch
- Purple daisy
- Purple dead nettle
- Purple dead nettle
- Purple duckweed
- Purple false-foxglove
- Purple false-foxglove
- Purple false-foxglove
- Purple flowering raspberry
- Purple fowl manna grass
- Purple fringed orchid
- Purple fringeless orchid
- Purple giant hyssop
- Purple joe pye weed; Green-stemmed joe-pye-weed
- Purple loosestrife
- Purple love grass
- Purple love grass
- Purple meadow rue
- Purple milkweed
- Purple milkwort
- Purple milkwort
- Purple poppy mallow
- Purple prairie clover
- Purple prairie clover
- Purple rocket; Blue mustard
- Purple sandgrass
- Purple twayblade; Lily-leaved twayblade
- Purple-headed sneezeweed
- Purple-sheathed graceful sedge
- Purple-stemmed Joe-pye-weed
- Purple-stemmed tickseed
- Purple-topped vervain, Tall vervain, South American vervain
- Purpleosier willow
- Pursh buttercup
- Pursh's tufted bulrush
- Purslane speedwell
- Pussy willow
R
174 plants
- Rabbit-foot clover
- Raccoon grape; Heart-leaved peppervine
- Radish; Garden radish
- Ragged evening primrose
- Ragged robin
- Ragged-Robin
- Ramps
- Rat-tail six-weeks-grass
- Rattlebox; Arrow-head rattlebox
- Rattlesnake chess
- Rattlesnake fern
- Rattlesnake manna grass
- Rattlesnake master
- Rattlesnake master
- Rattlesnake plantain
- Rattlesnake weed
- Rattlesnake-weed
- Rayless alkali aster
- Rectangular-sinused hedge bindweed
- Recurved blackberry
- Red baneberry
- Red buckeye: Firecracker-plant
- Red bulrush; Rufous bulrush
- Red catchfly
- Red clover
- Red fescue
- Red fescue
- Red hawthorn
- Red hemp nettle
- Red hemp nettle
- Red maple
- Red maple
- Red morning glory
- Red mulberry
- Red osier dogwood
- Red osier dogwood
- Red pine
- Red raspberry
- Red soapwort
- Red sprangle top
- Red top
- Red trillium; Bloody-butcher
- Red turtlehead
- Red-berried elderberry
- Red-rooted nut sedge
- Red-rooted spike rush; Bald spike-rush
- Red-stalked plantain; Black-seeded plantain
- Red-stemmed storksbill
- Red-whiskered clammyweed
- Redhead grass; Red-headed pondweed
- Redtop panic grass
- Reed bent grass; Ofer hollow reed grass
- Reed canary grass
- Reed manna grass
- Rescue-grass
- Reversed clover
- Rhubarb
- Ribbon-leaved pondweed
- Rice cut grass
- Ricefield bulrush, bog bulrush
- Ricefield flatsedge
- Richardson's rush; Alpine rush
- Riddell's goldenrod
- Ringed panic grass
- River birch
- River bulrush; River club-rush
- River bulrush; River club-rush
- Riverbank grape
- Riverbank tussock sedge; Emory's sedge
- Riverbank wild rye
- Roadside penny cress
- Robin's plantain
- Robin's plantain
- Rock elm
- Rock goldenrod
- Rock jasmine; Western rock-jasmine
- Rock sandwort; Michaux's stitchwort
- Rock satin grass
- Rock selaginella; Ledge spike moss
- Rock skullcap
- Rocket larkspur; Doubtful knight's-spur
- Rockrose; Hoary frostweed
- Rockspray cotoneaster
- Rocky mountain bee-plant; pink cleome
- Rocky mountain locust
- Rocky mountain sage; Lance-leaved sage
- Rocky stonecrop
- Rope dodder
- Rose gentian; Square-stemmed rose-gentian
- Rose pogonia
- Rose verbena; Rose vervian
- Rose-of-sharon
- Rosette goldenrod; Stout ragged goldenrod
- Rosin weed
- Rough avens
- Rough barnyard grass
- Rough barnyard grass
- Rough bedstraw
- Rough bent grass; Northern ticklegrass
- Rough blazing star
- Rough blue grass
- Rough buttercup
- Rough buttercup
- Rough buttonweed
- Rough cinquefoil; Norwegian cinqufoil
- Rough clustered sedge; Thin-leaved sedge
- Rough dropseed
- Rough forget-me-not
- Rough goldenrod
- Rough goldenrod
- Rough goldenrod
- Rough goldenrod
- Rough goldenrod
- Rough hawkweed
- Rough hedge nettle; Gritty hedge nettle
- Rough marbleseed
- Rough mexican clover
- Rough pennyroyal
- Rough pigweed; Rough green amaranth
- Rough rush grass
- Rough sand sedge; Schweintz's flat-sedge
- Rough sedge
- Rough water horehound; Western bugleweed
- Rough water milfoil; Cut-leaved water-milfoil
- Rough white lettuce
- Rough-leaved dogwood
- Rough-leaved goldenrod
- Rough-leaved goldenrod
- Rough-leaved rice grass
- Rough-mat grass
- Rough-toothed scouring-rush
- Round-fruited hedge hyssop
- Round-fruited hedge hyssop
- Round-fruited panic grass; Round-seed rosette grass
- Round-fruited pinweed
- Round-fruited St. John's wort
- Round-headed bush clover
- Round-headed rush; Needle-podded rush
- Round-leaved dogwood; Stiff dogwood
- Round-leaved hepatica
- Round-leaved orchid; Small round-leaved rein-orchid
- Round-leaved ragwort
- Round-leaved serviceberry
- Round-leaved shinleaf
- Round-leaved spurge
- Round-leaved sundew
- Round-leaved thoroughwort
- Round-leaved thoroughwort
- Round-leaved tick trefoil
- Round-leaved wooly croton
- Round-leaved wooly croton
- Round-stemmed false foxglove
- Royal catchfly
- Royal fern; Regal fern
- Rue anemone
- Running bog sedge; Few-seeded sedge
- Running buffalo clover
- Running ground pine
- Running marsh sedge; Sartwell's sedge
- Running savanna sedge; Dry-spiked sedge
- Running serviceberry
- Running strawberry bush
- Rush aster
- Rushfoil; Elliptical rushfoil
- Russian blue lettuce; Showy blue lettuce
- Russian knapweed
- Russian olive
- Russian pea-shrub
- Russian thistle
- Rusty cotton grass; Tawny cotton grass
- Rusty nannyberry; Southern black haw
- Rydberg's verbena
- Rye
- Rye brome; Chess
S
559 plants
- Safflower
- Salad burnet
- Salad burnet
- Salt meadow grass
- Saltcedar
- Saltmarsh rush
- Sampson's snakeroot
- Sampson's snakeroot
- Sand bluestem grass
- Sand coreopsis; Lance-leaved tickseed
- Sand croton; Tooth-leaved croton
- Sand dropseed
- Sand goat's beard
- Sand grape
- Sand lily
- Sand milkweed
- Sand panic grass; Eaton's rosette grass
- Sand prairie phlox; Downy phlox
- Sand primrose; Cleland's evening primrose
- Sand rocket
- Sand spurrey; Roadside sand spurrey
- Sand St. John's wort; Large Canada St. John's wort
- Sand violet; Arrow-leaved violet
- Sandbar love grass; Frank's lovegrass
- Sandbar willow
- Sandcherry
- Sanddune sandbur
- Sapphire-berry
- Sassafras
- Satin-flowered sand spurrey
- Satin-flowered sand spurrey
- Savanna blazing star
- Savin
- Saw-tooth sunflower
- Saw-toothed buckthorn
- Saw-toothed oak
- Sawtooth sunflower
- Sawtooth sunflower
- Scarlet bee balm
- Scarlet beeblossom
- Scarlet hawthorn
- Scarlet hawthorn
- Scarlet loosetrife; Sessile toothcup
- Scarlet oak
- Scentless chamomile
- Scentless mock orange
- Schuette's hawthorn
- Scorpion grass; Large-seeded forget-me-not
- Scotch cotton thistle
- Scotch cotton thistle
- Scotch pine
- Scotch pine
- Scotch rose
- Scott's spleenwort
- Scratch grass
- Scribner's panic grass; Heller's rosette grass
- Scrub pine; Virginia pine
- Scurfy pea
- Sea blite
- Seaside goldenrod
- Seaside goldenrod
- Seaside spurge
- Seedbox
- Selfheal
- Seneca snakeroot
- Sensitive fern
- Sessile trillium
- Sessile water horehound; Sessile-leaved bugleweed
- Sessile-flowered cress
- Sessile-leaved tick trefoil
- Shadbush; Allegheny serviceberry
- Shadbush; Inland serviceberry
- Shagbark hickory
- Shagbark hickory
- Sharp-fruited rush
- Sharp-lobed hepatica
- Sharp-scaled oak sedge; White-tinged sedge
- Sheep fescue; Hard fescue
- Shepherd's cress
- Shepherd's purse
- Sherard's bugleweed
- Sheviak's yellow lady's slipper
- Shining aster
- Shining bedstraw
- Shining bur sedge; Greater bladder sedge
- Shining clubmoss
- Shining flat sedge
- Shining wedge grass
- Shining willow
- Shore horsetail
- Shore little bluestem
- Shore St. John's wort; Creeping saint-john's-wort
- Short-beaked arrowleaf
- Short-beaked bald rush
- Short-fruited rush; White-rooted rush
- Short-fruited whitlow cress
- Short-headed bracted sedge; Oval-leaved sedge
- Short-headed rush
- Short-horned rice grass
- Short-leaved satin grass
- Short-pedicelled chickweed
- Short-pointed flat sedge; Taper-tipped flat-sedge
- Short-scaled green sedge; Carolina sedge
- Short-stalked bedstraw
- Short's aster
- Short's goldenrod
- Short's sedge
- Short's treambank chervil; Wild chervil
- Shortleaf pine
- Showy beard tongue
- Showy centaury; Branched centaury
- Showy evening primrose; White evening-primrose
- Showy fly honeysuckle
- Showy goldenrod
- Showy goldenrod
- Showy lady's slipper
- Showy orchis
- Showy ragged evening primrose
- Showy tick trefoil
- Shrubby bush clover; Thunberg's bushclover
- Shrubby bushclover
- Shrubby cinquefoil
- Shrubby St. John's wort
- Shrubby St. John's wort; Straggling St. John's wort
- Shrubby sundrops
- Shumard's oak
- Shumard's oak
- Shumard's oak
- Siberian cranesbill
- Siberian elm
- Siberian squill
- Sicklepod
- Sicklepod
- Side-flowering aster
- Side-flowering rush; Lopsided rush
- Side-oats grama
- Side-oats grama
- Siebold's arrow-wood
- Silk tree
- Silky aster
- Silky bent grass; Little-awned grass
- Silky bush clover
- Silky dogwood
- Silky willow
- Silver beardgrass
- Silver bluestem grass; Split-beard bluestem
- Silver bluestem grass; Split-beard bluestem
- Silver hair grass
- Silver hair grass
- Silver maple
- Silver plume grass
- Silver-leaved nightshade
- Silverrod
- Silverweed
- Silverweed
- Silvery cinquefoil
- Silvery spleenwort; Silvery glade fern; Silvery false spleenwort
- Six weeks fescue
- Six weeks fescue
- Six-sided stonecrop
- Skeleton weed; Yellow-flowered skeleton-weed
- Skunk cabbage
- Sky-blue aster
- Slavin's violet
- Sleepy catchfly
- Slender beard tongue
- Slender bog arrow grass; Marsh arrowgrass
- Slender bush clover
- Slender corydalis
- Slender corydalis; Small-flowered corydalis
- Slender cotton grass
- Slender crab grass
- Slender crab grass
- Slender false foxglove
- Slender false pimpernel; Yellow-seeded false pimpernel
- Slender false pimpernel; Yellow-seeded false pimpernel
- Slender gilia; Narrow-leaved mountain-trumpet; Tiny trumpet
- Slender green sedge; Ribbed sedge
- Slender heliotrope; Pasture heliotrope
- Slender Indian grass
- Slender knotweed; Pleat-leaved knotweed
- Slender ladies' tresses
- Slender ladies' tresses
- Slender milkwort
- Slender mountain mint
- Slender naiad; Thread-like naiad
- Slender panic grass
- Slender parsley piert
- Slender pondweed
- Slender sand sedge
- Slender sand sedge; Great plains flat-sedge
- Slender sandwort; Pitcher's stitchwort
- Slender satin grass
- Slender sedge; Bristly-stalked sedge
- Slender sedge; Bristly-stalked sedge
- Slender sedge; Bristly-stalked sedge
- Slender spike rush
- Slender spike rush
- Slender three-awn grass
- Slender three-seeded mercury; Slender three-seeded copperleaf
- Slender toothwort
- Slender water milfoil
- Slender waterweed; Free-flowered waterweed
- Slender wedgescale
- Slender wheat grass
- Slender wood oats
- Slender wood sedge; Slender loose-flowered sedge
- Slender woodland sedge
- Slender yellow flax
- Slender-leaved false foxglove
- Slender-leaved false foxglove
- Slender-leaved goldenrod
- Slender-leaved panic grass; Slim leaf rosette grass
- Slender-stalked guara
- Slimpod rush
- Slippery elm
- Small bedstraw
- Small bladderwort
- Small bluets; Red-eyed bluet
- Small bugseed
- Small bugseed; American bugseed
- Small carp grass
- Small clubmoss; Hidden spike moss
- Small Cottonweed, Slender Snake Cotton, Slender Cottonweed
- Small cranberry
- Small duckweed
- Small enchanter's nightshade
- Small field chickweed
- Small forget-me-not
- Small geranium; Small-flowered crane's bill
- Small green wood orchid; Little clubspur-orchid
- Small horse gentian; Yellow-flowered horse gentian
- Small ladies' tresses
- Small love grass
- Small morning glory
- Small mouse-ear chickweed; Five-stemmed mouse-eared sedge
- Small passion flower; Yellow passion flower
- Small pepper cress
- Small pinweed; Thyme-leaved pinweed
- Small plantain
- Small pussytoes
- Small pussytoes
- Small pussytoes
- Small pussytoes; Canada pussytoes
- Small rush grass
- Small scouring rush
- Small skullcap; Southern skullcap
- Small spearwort
- Small spike rush; Little-headed spike-rush
- Small sundrops; Small-evening primrose
- Small swine cress; Small wart cress cress
- Small white aster
- Small wild bean; Slick-seeded fuzzy-bean
- Small wood sunflower
- Small wormseed mustard
- Small yellow flax; Stiff yellow flax
- Small yellow sedge; Northeastern sedge
- Small-flowered bitter cress
- Small-flowered bitter cress
- Small-flowered buttercup
- Small-flowered coneflower
- Small-flowered crowfoot; Rock buttercup
- Small-flowered evening primrose
- Small-flowered false-foxglove
- Small-flowered false-foxglove
- Small-flowered forget-me-not
- Small-flowered gaura
- Small-flowered hairy willowherb
- Small-flowered half-chaff sedge
- Small-fruited false flax
- Small-fruited panic grass; Cypress rosette grass
- Small-fruited panic grass; Round-seed rosette grass
- Small-headed doll's daisy
- Small-headed doll's daisy
- Small-leaved tick trefoil
- Small's ragwort
- Small's snakeroot
- Smallflower hairy willowherb
- Smartweed; Dotted smartweed
- Smith's club-bulrush
- Smooth arrowwood
- Smooth beard tongue
- Smooth blue aster
- Smooth blue aster
- Smooth bracted tick trefoil; Large-bracted tick-trefoil
- Smooth burr marigold
- Smooth buttonweed; Smooth false buttonweed
- Smooth carrionflower
- Smooth chess; Bald brome
- Smooth clustered sedge
- Smooth crab grass
- Smooth creeping spurge; Rib-seeded mat-spurge
- Smooth false foxglove
- Smooth field sow thistle
- Smooth forked aster; Schreber's aster
- Smooth ground cherry
- Smooth hedge nettle
- Smooth lens grass
- Smooth peruvian daisy
- Smooth phlox
- Smooth phlox
- Smooth phlox
- Smooth pigweed
- Smooth pigweed; Tall amaranth
- Smooth purple cliff brake
- Smooth rock cress
- Smooth rock cress
- Smooth rock cress
- Smooth ruellia
- Smooth sand sedge; Houghton's flat-sedge
- Smooth satin grass
- Smooth scaleseed; Red river scaleseed
- Smooth scouring rush
- Smooth solomon's seal
- Smooth sumac
- Smooth swamp buttercup
- Smooth tick trefoil; Dillenius's tick-trefoil
- Smooth veiny vetchling
- Smooth wafer ash
- Smooth white goldenrod; Slender goldenrod
- Smooth white violet
- Smooth white violet; Sweet white violet
- Smooth woolly panic grass; Tapered rosette grass
- Smooth yellow false foxglove
- Smooth yellow false foxglove
- Smooth-flowered wild rye; Virginia wild-rye
- Smooth-fruited oak sedge; Shaved sedge
- Smooth-seeded nut rush; Little-headed but-rush
- Smooth-sheathed fox sedge
- Snailseed pondweed
- Snailseed; Carolina coralbeard
- Snow in summer
- Snow trillium
- Snow-on-the-mountain
- Snowdrop
- Snowy catchfly
- Soapwort gentian
- Soapwort gentian
- Soft agrimony; Downy agrimony
- Soft chess
- Soft chess
- Soft-haired marbleseed; Shaggy false gromwell
- Soldier rush; Bayonet rush
- Solid-stemmed burnet saxifrage
- Solitary cat's foot; Single-headed pussytoes
- Sorghum
- Sorghum
- Sorghum
- Soulard's crab
- Soulard's crabapple
- Sour cherry
- Sourwood
- Southeastern yellow wood sorrel
- Southern adder's tongue fern
- Southern arrowleaf; Long-beaked arrowhead
- Southern arrowwood
- Southern arrowwood
- Southern blazing star
- Southern blue flag
- Southern buckthorn; Buckhorn bully
- Southern cattail
- Southern crab grass
- Southern hop sedge; Louisiana sedge
- Southern lady fern
- Southern lake sedge; Shoreline sedge
- Southern naiad
- Southern naiad
- Southern naiad
- Southern red oak
- Southern rein orchid
- Southern skullcap
- Southern small skullcap
- Southern tubercled orchid
- Southern wood violet
- Southern yellow flax; Sandplain flax
- Southernwood; Southern wormwood
- Soybean
- Spanish bluebell
- Spanish gold
- Spanish needles
- Sparse-lobed grape fern; Southern grape fern
- Spatterdock
- Spear grass
- Spearmint
- Spearmint
- Spearwort; Water-plantain spearwort
- Speckled alder
- Speckled alder
- Spider brake
- Spider lily
- Spider-flower; Pink-queen
- Spiked water milfoil
- Spinulose wood fern; Toothed wood fern
- Spiny cocklebur
- Spiny coontail
- Spiny pigweed; Spiny amaranth
- Spiny plumeless thistle
- Spiny plumeless thistle
- Spotted cat's ear
- Spotted centaurea; Spotted knapweed
- Spotted centaurea; Spotted knapweed
- Spotted coral root
- Spotted coral root
- Spotted coral root
- Spotted creeping spurge
- Spotted glade-lover
- Spotted joe pye weed
- Spotted joe pye weed
- Spotted Joe-Pye-Weed
- Spotted phlox; Wild phlox; Wild sweet william
- Spotted pondweed
- Spotted St. John's wort
- Spotted touch-me-not; Orange jewelweed
- Spotted water hemlock
- Spotted water hemlock
- Spotted water meal; Dotted watermeal
- Spotted wintergreen
- Spreading cotoneaster
- Spreading dogbane
- Spreading oval sedge; Greater straw sedge
- Spreading rock cress
- Spreading sedge
- Spreading spurge
- Spreading star thistle
- Spreading tick trefoil;
- Spreading wild chervil
- Spreading yellow cress
- Spring avens
- Spring beauty
- Spring coral root; Wister's coralroot
- Spring fumewort
- Spring ladies' tresses; Grass-leaved ladies'-tresses
- Spring speedwell
- Spurred butterfly-pea
- Squirrel corn
- Squirrel-tail grass
- Squirrel-tail grass
- St. Andrew's cross
- Stack-fruited panic grass
- Staghorn sumac
- Stalk-grained sedge
- Stalked bur grass
- Stalked dodder; Cusp dodder
- Stalked great chickweed; Corey's chickweed
- Stalked hawthorn
- Stalked water horehound; Stalked bugleweed
- Stalked wool grass
- Standing cypress
- Star cleft phlox
- Star tickseed
- Starflower
- Starry campion; Starry catchfly
- Starry false solomon seal; Starry solomon's-plume
- Starry rosinweed
- Starved panic grass; Starved rosette grass
- Starwort; Grass-leaved starwort
- Steele's dewberry
- Steeplebush
- Stickseed
- Sticky false asphodel
- Stiff arrowhead
- Stiff aster
- Stiff aster; Prairie goldenrod
- Stiff bedstraw; Stiff marsh bedstraw
- Stiff dogwood
- Stiff dogwood
- Stiff gentian
- Stiff gentian
- Stiff goldenrod
- Stiff goldenrod
- Stiff goldenrod
- Stiff pondweed; Straight-leaved pondweed
- Stiff sunflower; Prairie sunflower
- Stiff tick trefoil
- Stiff yellow flax; Ridged yellow flax
- Stinging nettle
- Stink grass
- Stinking goosefoot
- Stitchwort
- Storksbill
- Stout blue-eyed grass
- Stout rush
- Straight-styled bracted sedge; Eastern star sedge
- Straw oval sedge; Prairie straw sedge
- Strawberry blite
- Strawberry bush; American burning-bush
- Strawberry clover
- Strawberry tomato
- Strict blue-eyed-grass
- Striped toadflax
- Stueve's bush clover; Tall bushclover
- Sugar hawthorn; Pear hawthorn
- Sugar maple
- Sugar maple
- Sugar maple
- Sugarberry
- Sulfur cinquefoil
- Sullivant's coolwort
- Sullivant's orange coneflower
- Summer cypress; Burning-bush
- Summer grape
- Summer grape
- Summer grape
- Summer savory
- Summer snowflake
- Sundial lupine
- Sunshine rose; Prairie rose
- Superb lily; Turk's-cap lily
- Swamp agrimony; Small-flowered agrimony
- Swamp bead grass
- Swamp beggar's ticks
- Swamp candles
- Swamp cottonwood
- Swamp dock
- Swamp holly; Deciduous holly
- Swamp loosetrife
- Swamp marigold; Swamp burr marigold
- Swamp milkweed
- Swamp milkweed
- Swamp oval sedge; Muskingum sedge
- Swamp privet
- Swamp rose mallow; Smooth-fruited rose-mallow
- Swamp saxifrage
- Swamp saxifrage
- Swamp smartweed; Bog smartweed
- Swamp star sedge; Weak stellate sedge
- Swamp white oak
- Swampy dewberry; Bristly dewberry
- Swampy rose
- Sweet alyssum
- Sweet autumn virgin's bower
- Sweet black-eyed susan; Sweet coneflower
- Sweet blue violet
- Sweet cherry
- Sweet fennel
- Sweet fern
- Sweet grass
- Sweet grass
- Sweet gum
- Sweet indian plantain
- Sweet iris
- Sweet mock orange
- Sweet sultan
- Sweet vernal grass
- Sweet William
- Sweet william catchfly
- Sweet-scented bedstraw; Fragrant bedstraw
- Sweetbrier
- Sweetbrier
- Sweetbrier
- Sweetbrier
- Sweetscent
- Sweetscent
- Swink's St. John's-Wort
- Swollen duckweed
- Sycamore
- Sycamore
- Sycamore maple
- Synandra; Gyandotte-beauty
T
144 plants
- Tall agrimony
- Tall alumroot; Common alumroot
- Tall alumroot; Common alumroot
- Tall anemone
- Tall anemone; Tall thimbleweed
- Tall beggar's ticks
- Tall blue lettuce
- Tall boneset
- Tall bur-head; Upright bur-head; heart-leaved bur-head
- Tall buttercup
- Tall coreopsis; Tall tickseed
- Tall cotton grass; Tassel cotton-grass
- Tall fescue
- Tall flat-topped white aster
- Tall forked chickweed; Smooth forked nailwort
- Tall goldenrod
- Tall goldenrod
- Tall green milkweed
- Tall hedge mustard
- Tall ironweed
- Tall melic grass
- Tall nettle
- Tall nut rush; Whip nut-rush
- Tall oat grass
- Tall oat grass
- Tall scouring rush
- Tall scouring rush, Common scouring rush
- Tall stinging nettle
- Tall sunflower; Giant sunflower
- Tall swamp marigold
- Tall thistle
- Tall water hemp; Common water hemp
- Tall white lettuce
- Tall white orchid
- Tall wood sorrel
- Tall yellow iris
- Tall yellow sweet clover
- Tansy mustard
- Tansy ragwort; Stinking Willie
- Tartarian honeysuckle
- Tarweed; Chilean tarweed
- Tatarian aster
- Tennessee fragile fern,Tennessee bladder fern
- Tennessee milk vetch
- Tennessee panic grass
- Terrestrial water starwort
- Texas bracted sedge
- Texas goldentop
- Texas honey locust
- Thick-leaved wild strawberry
- Thick-leaved wild strawberry
- Thicket bean
- Thicket bean
- Thicket creeper
- Thicket parsley; Eastern eulophus
- Thimbleberry
- Thin paspalum
- Thin paspalum
- Thin-leaved milkweed
- Thoroughwax; Hare's-ear thoroughwax
- Three-awn grass; Red three-awn
- Three-bedstraw bedstraw
- Three-leaved stonecrop; Wild stonecrop
- Three-lobed beggar's ticks
- Three-lobed coneflower
- Three-lobed violet
- Three-lobed violet
- Three-nerved duckweed
- Three-seeded bog sedge
- Three-seeded mercury; Common three-seeded copperleaf
- Three-seeded mercury; Rough-podded copperleaf
- Three-seeded mercury; Virginia three-seeded copperleaf
- Three-square club bulrush
- Three-veined narrow-leaved goosefoot
- Three-way sedge
- Three-way sedge
- Thyme-leaved sandwort
- Thyme-leaved sandwort
- Thyme-leaved speedwell
- Thyme-leaved speedwell
- Thyme; Mother-of-thyme
- Tiger lily
- Timothy grass
- Timothy grass
- Tinted spurge
- Toad rush
- Tomatillo
- Tomato
- Tomato; Garden tomato
- Toothed cress
- Toothed flat sedge
- Toothed rock cress; Short's rock cress
- Toothed spurge
- Toothed sundrops
- Toothwort; Cut-leaved toothwort
- Torrey's amaranth; Sandhill amaranth
- Torrey's bulrush
- Torrey's mountain mint
- Torrey's rush
- Tower mustard
- Tower mustard
- Tragia; Heart-leaved noseburn
- Trailing arbutus
- Trailing bush clover
- Trailing ground pine
- Trailing ground pine
- Trailing pearlwort
- Trailing pearlwort
- Trailing wild bean; Trailing fuzzy-bean
- Trampled dewberry
- Treacle mustard
- Tree ground pine; Treelike club moss
- Tree ground pine; Treelike club moss; Prickly tree club moss
- Tree-of-heaven
- Triangular-valved dock, Willow dock
- Trifling hawthorn; Copenhagen hawthorn
- Trillium hybrid
- Triploid wood fern
- Trumpet creeper
- Trumpet honeysuckle
- Tufted flat sedge; Low spiked-sedge
- Tufted hair grass
- Tufted hair grass
- Tufted lake sedge; Lesser bladder sedge
- Tufted loosestrife
- Tulip poplar; Tuliptree
- Tumble mustard; Tall tumbing mustard
- Tumbleweed; Tumbleweed amaranth
- Turnip; Rape
- Twig rush; Smooth saw-grass
- Twinflower
- Twinleaf
- Twisted yellow-eyed grass; Slender yellow-eyed-grass
- Two-colored bushclover
- Two-flower false dandelion; Two-flowered cynthia
- Two-flowered violet
- Two-leaved toothwort
- Two-seeded hawthorn
- Two-seeded hawthorn; Spreading hawthorn
- Two-seeded mercury; Two-seeded copperleaf
- Two-seeded sedge; Soft-leaved sedge
- Typical hedge bindweed
- Typical hedge bindweed
- Tyrol knapweed; Black knapweed
U
11 plants
V
59 plants
- Variable flat sedge
- Variable panic grass
- Variable panic grass; Variable rosette grass
- Variegated milkweed; White milkweed
- Variegated scouring rush, Variegated horsetail
- Various-leaved water milfoil
- Vasey's pondweed
- Veiny pea; Veiny vetchling
- Veiny skullcap
- Velvet bent grass
- Velvet blackberry; Yankee blackberry
- Velvet grass
- Velvety white vervain
- Venus' pride
- Venus' pride
- Venus's looking glass; Round-leaved venus's-looking-glass
- Vervain mallow
- Villous alumroot
- Villous alumroot; Hairy alumroot
- Violet bush clover
- Violet bush clover
- Violet crab grass
- Violet cress; Purple rocket
- Violet hybrid
- Violet hybrid
- Violet hybrid
- Violet hybrid
- Violet hybrid
- Violet hybrid
- Violet hybrid
- Violet hybrid
- Violet wood sorrel
- Violet-flowered petunia
- Viper's bugloss; Blueweed
- Virgin's bower
- Virginia bluebells
- Virginia buttonweed
- Virginia chain fern
- Virginia creeper
- Virginia day flower
- Virginia dwarf dandelion
- Virginia ground cherry
- Virginia knotweed
- Virginia mallow: Virginia sida
- Virginia marsh St. John's wort; Virginia St. John's-wort
- Virginia obedient plant
- Virginia obedient plant
- Virginia rock cress
- Virginia spiderwort
- Virginia spring-beauty, Spring-beauty
- Virginia waterleaf
- Virginia waterleaf
- Virginia wild rye
- Virginia wild rye
- Virginia wild rye
- Virginia wild rye
- Virginia willow; Virginia sweetspire
- Viscid field sow thistle
- Viscid grass-leaved goldenrod; Great plains flat-topped goldenrod
W
247 plants
- Wagner's spleenwort
- Walking fern
- Wall bedstraw
- Wall rocket
- Wall-rue spleenwort
- Walter's marsh St. John's wort; Walter's St. John's-wort
- Wand mullein
- Warty panic grass
- Washington dc dewberry; Swift dewberry
- Washington hawthorn
- Water arum; Wild calla
- Water bulrush
- Water cress
- Water foxtail
- Water hemlock
- Water hyssop; Round-leaved water-hyssop
- Water knotweed
- Water locust
- Water mint
- Water parsnip
- Water pennywort
- Water pepper
- Water pimpernel
- Water purslane
- Water smartweed
- Water smartweed, Water heartsease
- Water speedwell; Blue water speedwell
- Water star grass; Grass-leaved mud-plaintain
- Water thyme
- Water willow
- Water-thread pondweed
- Watermelon
- Watershield
- Wavy-leaved aster
- Wavy-leaved thistle
- Wavy-stemmed bittercress
- Waxy meadow rue; Wax-leaved meadow-rue
- Waxyfruit hawthorn
- Waxyfruit hawthorn
- Waxyfruit hawthorn
- Wayfaring tree
- Weak blue grass
- Weak blue grass
- Weak sedge
- Weak St. John's-wort; Dwarf St. John's-wort
- Weak-stemmed wood sedge; Spreading sedge
- Weedy dwarf dandelion
- Weeping forsythia
- Weeping willow
- Weeping willow
- Weft fern
- Weft fern
- Weld
- Western beard tongue; Trumpet beardtongue
- Western poison ivy; Poison sumac
- Western ragweed
- Western sunflower
- Western sunflower
- Western wallflower
- Western wild lettuce
- Wheat
- Wheeler's blackberry
- Wheelwort
- Wherry's wood fern
- Whiplash hawkweed
- White adder's tongue; White trout lily
- White adder's-mouth orchid
- White ash
- White avens
- White basswood; American basswood
- White beak rush
- White bedstraw
- White bedstraw; Baby's-breath bedstraw
- White camass; White death-camas
- White campion
- White clover
- White fireweed
- White forget-me-not
- White fringe tree
- White grass
- White lady's slipper
- White meadowsweet
- White mulberry
- White mustard
- White mustard
- White oak
- White panicle aster
- White panicle aster
- White panicle aster
- White panicle aster
- White pine
- White poplar
- White prairie clover
- White prairie clover
- White prickly poppy; Short-horned white prickly-poppy
- White sage
- White sage; White sagebrush
- White snakeroot
- White snakeroot
- White stonecrop
- White sweet clover
- White thoroughwort
- White thoroughwort
- White turtlehead
- White verbena
- White vervian
- White water crowfoot; White water buttercup
- White wild indigo
- White wild indigo; Cream wild-indigo
- White willow
- White Wood Aster, Common White Heart-leaved Aster
- White-edged sedge
- White-haired panic grass
- White-stemmed pondweed
- White-tinged sedge
- Whitehair rosette grass
- Whorled loosestrife
- Whorled milkweed; Four-leaved milkweed
- Whorled milkwort
- Whorled milkwort
- Whorled milkwort
- Whorled milkwort
- Whorled mountain mint
- Whorled mountain mint
- Whorled plantain
- Whorled rosinweed
- Whorled rosinweed
- Whorled rosinweed
- Whorled water milfoil
- Wicket spike rush; Beaked spike-rush
- Wide-leaved lamb's quarters
- Wide-leaved leafy spurge
- Widow's cross
- Wilcox's panic grass
- Wild bergamot
- Wild bergamot
- Wild black cherry
- Wild black currant
- Wild blue phlox; Woodland phlox; Forest phlox
- Wild chervil
- Wild chervil
- Wild chervil; Southern chervil
- Wild chives
- Wild comfrey
- Wild cucumber
- Wild four o'clock; Heart-leaved umbrella-wort
- Wild garlic
- Wild garlic
- Wild geranium
- Wild golden glow
- Wild goose plum; Hortulan plum
- Wild hyacinth; Early-blooming wild hyacinth
- Wild hyacinth; Late-blooming wild hyacinth
- Wild hydrangea
- Wild leek; Broad-leaved ramps
- Wild leek; Narrow-leaved ramps
- Wild lettuce
- Wild licorice
- Wild licorice
- Wild lupine
- Wild madder
- Wild mint
- Wild mudwort; Branched foldwing
- Wild oats
- Wild pansy; European field pansy
- Wild parsnip
- Wild petunia
- Wild phlox
- Wild phlox
- Wild plum; Bigtree plum
- Wild quinine
- Wild radish
- Wild radish
- Wild rape; Annual bastard cabbage
- Wild sarsaparilla
- Wild senna
- Wild sensitive plant
- Wild sensitive plant; Small-flowered partridge pea
- Wild strawberry
- Wild sweet crab
- Wild sweet potato; Pink-eyed morning-glory
- Willdenow's grass sedge
- Willow aster
- Willow oak
- Willow-leaved lettuce
- Windmill grass
- Wineberry; Wine raspberry
- Winecup
- Winged elm
- Winged euonymus; Winged burning-bush
- Winged loosestrife
- Winged monkey flower
- Winged oval sedge; Broad-winged sedge
- Winged pigweed
- Winged sumac
- Wingstem
- Winter grape; Gray-barked grape
- Winter vetch
- Winter vetch
- Winter vetch
- Winterberry
- Winterberry; Chinese spindletree
- Wintercreeper
- Wirtgen's bedstraw
- Witch hazel
- Wolf's blue grass
- Wolf's spike rush
- Wolfberry
- Wood anemone
- Wood anemone; American wood anemone
- Wood angelica; Hairy angelica
- Wood betony
- Wood betony
- Wood gray sedge; Inflated narrow-leaved sedge
- Wood millet
- Wood mint
- Wood mint; Hairy wood-mint
- Wood vetch; Woodland vetch
- Wood's stiff sedge; Pretty sedge
- Woodland agrimony; Beaked agrimony
- Woodland blue grass
- Woodland blue grass
- Woodland brome
- Woodland catchfly; Ovate catchfly
- Woodland fragile fern; Southern bladder fern, Lowland bladder fern
- Woodland goosefoot
- Woodland horsetail
- Woodland sage
- Woodland satin grass
- Woodland strawberry
- Woodland sunflower
- Woodland sunflower
- Woodland sunflower
- Woodland sunflower
- Woodland sunflower
- Wool grass; Wool grass bulrush
- Woolly croton
- Woolly hedge nettle
- Woolly mullein; Great mullein
- Woolly panic grass; Tapered rosette grass
- Woolly plantain
- Wormseed mustard
- Woundwort
- Wrinkle-fruited oak sedge; Shaved sedge
- Wrinkle-sheathed spike rush; Bright-green spike-rush
- Wrinkled grape fern; St. Lawrence grape fern; Ternate grapefern
- Wrinkled gray sedge; Prune-fruited sedge
X
No plants found starting with X
Y
37 plants
- Yellow adder's tongue
- Yellow alfalfa
- Yellow archangel
- Yellow avens
- Yellow birch
- Yellow buckeye; Sweet buckeye
- Yellow coneflower; Gray-headed coneflower
- Yellow crownbeard
- Yellow downy fly-honeysuckle
- Yellow false foxglove; Large-flowered yellow-false-foxglove
- Yellow flat sedge
- Yellow floatingheart
- Yellow giant hyssop
- Yellow hop clover; Palmate hop clover
- Yellow ladies' tresses
- Yellow lady's slipper
- Yellow meadow parsnip
- Yellow meadow parsnip
- Yellow nut sedge
- Yellow pimpernel
- Yellow rocket; Bitter winter cress
- Yellow screwstem
- Yellow spatterdock
- Yellow spikerush
- Yellow spring bedstraw
- Yellow star grass
- Yellow stonecrop; Stringy stonecrop
- Yellow sweet clover
- Yellow trout lily
- Yellow violet
- Yellow water buttercup
- Yellow wild indigo
- Yellow-eyed grass
- Yellow-flowered cross-bedstraw
- Yellow-green catchfly
- Yellowwood
- Yerba de tajo
Z
No plants found starting with Z