List of plants by common name
The common names of plants often vary from region to region, which is why most plant encyclopedias refer to plants using their scientific names: binomials, or "Latin" names.
A
- Alder – Alnus
- Black alder – Alnus glutinosa, Ilex verticillata
- Common alder – Alnus glutinosa
- False alder – Ilex verticillata
- Gray alder – Alnus incana
- Speckled alder – Alnus incana
- Striped alder – Ilex verticillata
- White alder – Alnus incana, Ilex verticillata
- Almond – Prunus amygdalus
- Ambrosia
- Tall ambrosia – Ambrosia trifida
- Amy root – Apocynum cannabinum
- Apple – Malus domestica
- Osage apple – Maclura pomifera
- Apple of Sodom – Solanum carolinense
- Apricot – Prunus armeniaca
- Arfaj – Rhanterium epapposum
- Arizona sycamore – Platanus wrighitii
- Arrowwood – Cornus florida
- Indian arrowwood – Cornus florida
- Ash – Fraxinus spp.
- Black ash – Acer negundo, Fraxinus nigra
- Blue ash – Fraxinus pennsylvanica
- Cane ash – Fraxinus americana
- Green ash – Fraxinus pennsylvanica
- Maple ash – Acer negundo
- Red ash – Fraxinus pennsylvanica
- River ash – Fraxinus pennsylvanica
- Swamp ash – Fraxinus pennsylvanica
- White ash – Fraxinus americana
- Water ash – Acer negundo, Fraxinus pennsylvanica
- Azolla – Azolla
- Carolina azolla – Azolla caroliniana
B
- Bamboo – Bambuseae
- Banana – mainly Musa × paradisica, but also other Musa species and hybrids
- Baobab – Adansonia
- Bay – Laurus spp. or Umbellularia spp.
- Bay laurel – Laurus nobilis (culinary)
- California bay – Umbellularia californica
- Bean – Fabaceae, specifically Phaseolus spp.
- Bearberry – Ilex decidua
- Bear corn – Veratrum viride
- Beech – Fagus
- Bindweed
- Blue bindweed – Solanum dulcamara
- Bird's nest – Daucus carota
- Bird's nest plant – Daucus carota
- Birch – Betula spp.
- Black birch – Betula lenta, Betula nigra
- Bolean birch – Betula papyrifera
- Canoe birch – Betula papyrifera
- Cherry birch – Betula lenta
- European weeping birch – Betula pendula
- European white birch – Betula pendula
- Gray birch – Betula alleghaniensis
- Mahogany birch – Betula lenta
- Paper birch – Betula papyrifera
- Red birch – Betula nigra
- River birch – Betula nigra, Betula lenta
- Silver birch – Betula papyrifera
- Spice birch – Betula lenta
- Sweet birch – Betula lenta
- Water birch – Betula nigra
- Weeping birch – Betula pendula
- White birch – Betula papyrifera, Betula pendula
- Yellow birch – Betula alleghaniensis
- Bittercress – Barbarea vulgaris, Cardamine bulbosa, Cardamine hirsuta
- Hairy bittercress – Cardamine hirsuta
- Bittersweet – Solanum dulcamara
- Trailing bittersweet – Solanum dulcamara
- Bitterweed – Any plant in the Ambrosia genus, specially Ambrosia artemisiifolia, Artemisia trifida, Helenium amarum
- Blackberry – Rubus spp., Rubus pensilvanicus, Rubus occidentalis
- Hispid swamp blackberry – Rubus hispidus
- Pennsylvania blackberry – Rubus pensilvanicus
- Running swamp blackberry – Rubus hispidus
- Black cap – Rubus occidentalis
- Black-eyed Susan – Rudbeckia hirta, Rudbeckia fulgida
- Blackhaw – Viburnum prunifolium
- Blackiehead – Rudbeckia hirta
- Black-weed – Ambrosia artemisiifolia
- Blueberry – Vaccinium (Cyanococcus) spp.
- Blue-of-the-heavens – Allium caeruleum
- Bow-wood – Maclura pomifera
- Box – Buxus
- False box – Cornus florida
- Boxelder – Acer negundo
- Boxwood – Buxus, Cornus florida
- False boxwood – Cornus florida
- Brier
- Sand brier – Solanum carolinense
- Brittlebush – Encelia farinosa
- Broadleaf – Plantago major
- Brown Betty – Rudbeckia hirta
- Brown-eyed Susan – Rudbeckia hirta, Rudbeckia triloba
- Buckeye (California buckeye) – Aesculus californica
- buckeye – Aesculus spp.
- Buffalo weed – Ambrosia trifida
- Butterfly flower – Asclepias syriaca
- Butterfly weed – Asclepias tuberosa
C
- Cabbage – Brassica oleracea
- Clumpfoot cabbage – Symplocarpus foetidus
- Meadow cabbage – Symplocarpus foetidus
- Skunk cabbage – Symplocarpus foetidus, Lysichiton spp.
- Swamp cabbage – Symplocarpus foetidus
- California bay – Umbellularia californica
- California buckeye – Aesculus californica
- California sycamore – Platanus racemosa
- California walnut – Juglans californica
- Canada root – Asclepias tuberosa
- Cancer jalap – Phytolacca americana
- Carrot – Daucus carota
- Wild carrot – Daucus carota
- Carrot weed – Ambrosia artemisiifolia
- Cart track plant – Plantago major
- Catalina ironwood – Lyonothamnus floribundus ssp. floribundus
- Cherry – Prunus spp.
- Black cherry – Prunus serotina
- Cabinet cherry – Prunus serotina
- Rum cherry – Prunus serotina
- Whiskey cherry – Prunus serotina
- Wild cherry – Prunus avium, Prunus serotina
- Wild black cherry – Prunus serotina
- Chestnut – Castanea spp.
- Chigger flower – Asclepias tuberosa
- Chrysanthemum – Dendranthema grandiflora, Chrysanthemum morifolium
- (True) cinnamon – Cinnamomum verum
- Clove – Syzygium aromaticum
- Clover – Trifolium spp.
- Coakum – Phytolacca americana
- Coconut – Cocos nucifera
- Coffee plant – Coffea spp.
- Colic weed – Corydalis flavula
- Collard – Symplocarpus foetidus
- Colwort
- Hare's colwort – Sonchus oleraceus
- Coneflower
- Brilliant coneflower – Rudbeckia fulgida
- Cutleaf coneflower – Rudbeckia laciniata
- Eastern coneflower – Rudbeckia fulgida
- Green-headed Coneflower – Rudbeckia laciniata
- Orange coneflower – Rudbeckia fulgida
- Tall coneflower – Rudbeckia laciniata
- Thin-leaved Coneflower – Rudbeckia triloba
- Three-leaved Coneflower – Rudbeckia triloba
- Cornel
- Blueberry cornel – Cornus amomum
- Silky cornel – Cornus amomum
- White cornel – Cornus florida
- Cornelian tree – Cornus florida
- Corydalis – Corydalis spp.
- Fern-leaf Corydalis – Corydalis chelidoniifolia
- Golden corydalis – Corydalis aurea
- Pale corydalis – Corydalis flavula, Corydalis sempervirens
- Pink corydalis – Corydalis sempervirens
- Yellow corydalis – Corydalis lutea, Corydalis flavula
- Cotton plant – Gossypium
- Creeping yellowcress – Rorippa sylvestris
- Cress – (several genera)
- American cress – Barbarea verna
- Bank cress – Barbarea verna
- Belle Isle cress – Barbarea verna
- Bermuda cress – Barbarea verna
- Bulbous cress – Cardamine bulbosa
- Lamb's cress – Cardamine hirsuta
- Land cress – Barbarea verna, Cardamine hirsuta
- Scurvy cress – Barbarea verna
- Spring cress – Cardamine bulbosa
- Upland cress – Barbarea verna
- Crowfoot – Cardamine concatenata
- Crow's nest – Daucus carota
- Crow's toes – Cardamine concatenata
- Cucumber – Cucumis sativus
D
- Daisy
- Brown daisy – Rudbeckia hirta
- Common daisy, daisy – Bellis perennis
- Gloriosa daisy – Rudbeckia hirta
- Poorland daisy – Rudbeckia hirta
- Yellow daisy – Rudbeckia hirta
- Yellow ox-eye daisy – Rudbeckia hirta
- Deadnettle – Lamium spp.
- Henbit deadnettle – Lamium amplexicaule
- Spotted deadnettle – Lamium maculatum
- Devil's bite – Veratrum viride
- Devil's darning needle – Clematis virginiana
- Devil's nose – Clematis virginiana
- Devil's plague – Daucus carota
- Dewberry
- Bristly dewberry – Rubus hispidus
- Swamp dewberry – Rubus hispidus
- Dindle – Sonchus arvensis
- Dogwood – Cornus spp.
- American dogwood – Cornus florida
- Florida dogwood – Cornus florida
- Flowering dogwood – Cornus florida
- Japanese flowering dogwood – Cornus kousa
- Kousa dogwood – Cornus kousa
- Drumstick – Moringa oleifera
- Pacific dogwood – Cornus nuttallii
- Silky dogwood – Cornus amomum
- Swamp dogwood – Cornus amomum
- Duck retten – Veratrum viride
- Duscle – Solanum nigrum
- Dye-leaves – Ilex glabra
E
- Earth gall – Veratrum viride
- English bull's eye – Rudbeckia hirta
- Eucalyptus – Eucalyptus spp.
- Extinguisher moss – Encalypta
- Eytelia – Amphipappus
F
- Fair-maid-of-France – Achillea ptarmica
- Fairymoss Azolla caroliniana
- Fellenwort – Solanum dulcamara
- Felonwood – Solanum dulcamara
- Felonwort – Solanum dulcamara
- Fennel – Foeniculum vulgare
- Ferns
- Boston fern or sword fern – Nephrolepis exaltata
- Christmas fern – Polystichum acrostichoides
- Coast polypody – Polypodium scouleri
- Kimberly queen fern – Nephrolepis obliterata
- Korean rock fern – Polystichum tsus-simense
- Mosquito fern – Azolla caroliniana
- Sword ferns – Polystichum spp.
- Water fern – Azolla caroliniana
- Western sword fern – Polystichum munitum
- Feverbush – Ilex verticillata
- Feverfew – Tanacetum parthenium
- Fig – Ficus spp.
- Common fig – Ficus carica
- Flax
- European flax – Linum usitatissimum
- New Zealand flax – Phormium tenax, Phormium colensoi
- Fluxroot – Asclepias tuberosa
- Fumewort
- Yellow fumewort – Corydalis flavula
G
- Gallberry – Ilex glabra
- Garget – Phytolacca americana
- Garlic
- Golden garlic – Allium moly
- Wild garlic – Allium canadense
- Garlic mustard – Alliaria petiolata
- Garlic root – Alliaria petiolata
- Gilliflower
- Dame's gilliflower – Hesperis matronalis
- Night scented gilliflower – Hesperis matronalis
- Queen's gilliflower – Hesperis matronalis
- Rogue's gilliflower – Hesperis matronalis
- Winter gilliflower – Hesperis matronalis
- Golden buttons – Tanacetum vulgare
- Goldenglow – Rudbeckia laciniata
- Golden Jerusalem – Rudbeckia hirta
- Gordaldo – Achillea millefolium
- Goose tongue – Achillea ptarmica
- Grapefruit – Citrus × paradisi
- Grapevine – Vitis
- Groundberry – Rubus hispidus
- Bristly groundberry – Rubus hispidus
- Gutweed – Sonchus arvensis
H
- Haldi – Curcuma domestica
- Harlequin
- Rock harlequin – Corydalis sempervirens
- Yellow harlequin – Corydalis flavula
- Hay fever weed – Ambrosia artemisiifolia, Artemesia trifida
- Healing blade – Plantago major
- Hedge plant – Maclura pomifera
- Hellebore – Helleborus
- American white hellebore – Veratrum viride
- Big hellebore – Veratrum viride
- Black hellebore – Veratrum nigrum
- European white hellebore – Veratrum album
- False hellebore – Veratrum album, Veratrum viride
- Swamp hellebore – Veratrum viride
- White hellebore – Veratrum album, Veratrum viride
- Hemp – Cannabis spp., specifically Cannabis sativa
- Hemp dogbane – Apocynum cannabinum
- Hen plant – Plantago major
- Herb barbara – Barbarea vulgaris
- Hogweed – Ambrosia artemisiifolia
- Holly – Ilex spp.
- Deciduous holly – Ilex decidua, Ilex verticillata
- European holly – Ilex aquifolium
- Inkberry holly – Ilex glabra
- Meadow holly – Ilex decidua
- Swamp holly – Ilex decidua
- Winterberry holly – Ilex verticillata
- Horse cane – Ambrosia trifida
- Hound's berry – Solanum nigrum
- Huckleberry – Vaccinium spp.
- Evergreen huckleberry – Vaccinium ovatum
- Trailing red huckleberry – Vaccinium parvifolium
- Houseleek – Sempervivum tectorum
I
- Indian hemp – various genera
- Indian hemp – Apocynum cannabinum, Cannabis indica
- White Indian hemp – Asclepias incarnata
- Indian paintbrush – Castilleja, Castilleja mutis, Asclepias tuberosa
- Indian posy – Asclepias tuberosa
- Inkberry – Ilex glabra, Phytolacca americana
- Isle of Man cabbage – Coincya monensis
- Itchweed – Veratrum viride
- Ivy – Hedera spp.
J
- Jack-by-the-hedge – Alliaria petiolata
- Jack-in-the-bush – Alliaria petiolata
- Juneberry – Amelanchier canadensis
- Juniper – Various species in the genus Juniperus
K
- Keek – Rorippa sylvestris
- Kinnikinnik – Cornus amomum
- Kousa – Cornus kousa
- Kudzu – Pueraria lobata
L
- Laceflower – Daucus carota
- Lamb's foot – Plantago major
- Lavender – Lavandula
- Leek – Allium
- Lemon – Citrus × limon
- Lettuce – Lactuca sativa
- Lily leek – Allium moly
- Lilac
- Summer lilac – Hesperis matronalis
- Love vine – Clematis virginiana
M
- Ash-leaved maple – Acer negundo
- Black maple – Acer nigrum
- Creek maple – Acer saccharinum
- Cutleaf maple – Acer negundo
- Maple ash – Acer negundo
- Moose maple – Acer pensylvanicum
- Red river maple – Acer negundo
- River maple – Acer saccharinum
- Silver maple – Acer saccharinum
- Silverleaf maple – Acer saccharinum
- Soft maple – Acer saccharinum
- Striped maple – Acer pensylvanicum
- Sugar maple – Acer saccharum (main use), Acer barbatum, Acer leucoderme,
- Swamp maple – Acer saccharinum
- Water maple – Acer saccharinum
- White maple – Acer saccharinum
- Mesquite – Prosopis
- Honey mesquite – Prosopis glandulosa
- Screwbean mesquite – Prosopis pubescens
- Milfoil – Achillea millefolium
- Milkweed – Asclepias, Sonchus oleraceus
- Blunt-leaved Milkweed – Asclepias amplexicaulis
- Common milkweed – Asclepias syriaca
- Horsetail milkweed – Asclepias verticillata
- Orange milkweed – Asclepias tuberosa
- Swamp milkweed – Asclepias incarnata
- Rose milkweed – Asclepias incarnata
- Whorled milkweed – Asclepias verticillata
- Yellow milkweed – Asclepias tuberosa
- Milky tassel – Sonchus oleraceus
- Moosewood – Acer pensylvanicum
- Morel – Solanum nigrum
- Petty morel – Solanum nigrum
- Mosquito plant – Azolla caroliniana
- Mother-of-the-evening – Hesperis matronalis
- Mountain mahogany – Betula lenta
- Mulberry – Morus
- Red mulberry – Morus rubra
- White mulberry – Morus alba
N
- Nature's mistake – Cornus florida
- Neem – Azadirachta indica
- Nettle
- Bull nettle – Solanum carolinense
- Carolina horse nettle – Solanum carolinense
- Horse nettle – Solanum carolinense
- Nightshade
- American nightshade – Phytolacca americana, Solanum americanum
- Bitter nightshade – Solanum dulcamara
- Black nightshade – Solanum nigrum, Solanum americanum
- Climbing nightshade – Solanum dulcamara
- Deadly nightshade – Solanum nigrum
- Garden nightshade – Solanum nigrum
- Trailing nightshade – Solanum dulcamara
- Trailing violet nightshade – Solanum dulcamara
- Woody nightshade – Solanum dulcamara
- Nosebleed – Achillea millefolium
O
- Oak tree -Quercus
- Algerian Oak Quercus canariensis
- Blue oak – Quercus douglasii
- Bur oak – Quercus macrocarpa
- California Black Oak Quercus kelloggii
- Canyon Live Oak Quercus chrysolepis
- Champion oak – Quercus rubra
- Coast live oak – Quercus agrifolia
- Cork oak – Quercus suber
- Dyer's oak – Quercus velutina
- Eastern black oak – Quercus velutina'
- English oak – Quercus robur
- Island oak – Quercus. tomentella
- Mirbeck's oak – Quercus canariensis
- Mossycup white oak – Quercus macrocarpa
- Northern red oak – Quercus rubra
- Pedunculate oak – Quercus robur
- Pin oak – Quercus palustris
- Red oak – Quercus rubra, Quercus coccinea
- Scarlet oak – Quercus coccinea
- Scrub oak – Quercus macrocarpa
- Sessile oak – Quercus petraea
- Spanish oak – Quercus coccinea, Quercus rubra
- Spotted oak – Quercus velutina
- Swamp oak – Quercus palustris, Quercus bicolor
- Swamp Spanish oak – Quercus palustris
- Swamp white oak – Quercus bicolor
- Valley oak – Quercus lobata
- White oak – Quercus alba
- Yellowbark oak – Quercus velutina
- Common onion – Allium cepa
- Giant onion – Allium giganteum
- Nodding onion – Allium cernuum
- Tree onion – Allium canadense
- Wild onion – Allium canadense
- Orange-[awr-inj,or-]
- Osage orange – Maclura pomifera
- sweet orange – Citrus × sinensis
- Wild orange – Maclura pomifera
- Orange-root – Asclepias tuberosa
- Osage – Maclura pomifera
- Osier - Salix; (in North America) Cornus
- Red osier – Cornus amomum
P
- Parsley – Petroselinum crispum
- Parsnip – Pastinaca sativa, Daucus carota
- Pea – Pisum sativum
- Peach – Prunus persica
- Peanut – Arachis hypogaea
- Pear – Pyrus
- Pellitory
- Bastard pellitory – Achillea ptarmica
- European pellitory – Achillea ptarmica
- Wild pellitory – Achillea ptarmica
- Penny hedge – Alliaria petiolata
- Pepper root – Cardamine concatenata
- Pigeon berry – Phytolacca americana
- Pine – Pinus
- Pineapple – Ananas comosus
- Pistachio – Pistacia vera
- Plane (European sycamore) – Platanus acerifolia
- Plantain
- Broadleaf plantain – Plantago major
- Common plantain – Plantago major
- Dooryard plantain – Plantago major
- Greater plantain – Plantago major
- Roundleaf plantain – Plantago major
- Wayside plantain – Plantago major
- Pleurisy root – Asclepias tuberosa
- Pocan bush – Phytolacca americana
- Poison ivy – Toxicodendron radicans
- Poisonberry – Solanum dulcamara
- Poisonflower – Solanum dulcamara
- Poke – Phytolacca americana
- Indian poke – Veratrum viride
- Pokeroot – Phytolacca americana
- Pokeweed – Phytolacca americana
- Polkweed – Symplocarpus foetidus
- Polecat weed – Symplocarpus foetidus
- Poor Annie – Veratrum viride
- Poor man's mustard – Alliaria petiolata
- Poplar – Populus
- Poppy – Papaveraceae
- Possumhaw – Ilex decidua
- Potato – Solanum tuberosum
- Pudina – Mentha indica
Q
- Queen Anne's lace – Daucus carota, Anthriscus sylvestris
- Quercitron – Quercus velutina
R
- Radical weed – Solanum carolinense
- Ragweed – Ambrosia
- Common ragweed – Ambrosia artemisiifolia
- Giant ragweed – Ambrosia trifida
- Great ragweed – Ambrosia trifida
- Ragwort – Senecio
- Common ragwort – Senecio jacobaea
- Hoary ragwort – Senecio erucifolius
- Marsh ragwort – Senecio aquaticus
- Oxford ragwort – Senecio squalidus
- Silver ragwort – Senecio cineraria
- Rantipole – Daucus carota
- Rapeseed – Brassica napus
- Raspberry – Rubus (Idaeobatus) spp.
- Black raspberry – Rubus occidentalis
- Purple raspberry – Rubus occidentalis
- Redbrush – Cornus amomum
- Redbud – Cercis spp.
- Eastern redbud – Cercis canadensis
- Western redbud – Cercis occidentalis
- Judas-tree – Cercis siliquastrum
- Red ink plant – Phytolacca americana
- Redweed – Phytolacca americana
- Rheumatism root – Apocynum cannabinum
- Rhubarb – Rheum rhabarbarum
- Ribwort – Plantago major
- Rice
- Asian rice – Oryza sativa
- African rice – Oryza glaberrima
- Roadweed – Plantago major
- Rocket – (several genera)
- Dame's rocket – Hesperis matronalis
- Sweet rocket – Hesperis matronalis
- Winter rocket – Barbarea vulgaris
- Yellow rocket – Barbarea vulgaris
- Rocketcress – Barbarea vulgaris
- Rose – Rosa
- Baby rose – Rosa multiflora
- Dwarf wild rose – Rosa virginiana
- Low rose – Rosa virginiana
- Multiflora rose – Rosa multiflora
- Prairie rose – Rosa virginiana
- Rambler rose – Rosa multiflora
- Wild rose – Rosa virginiana
S
- Saffron crocus – Crocus sativus
- Sanguinary – Achillea millefolium
- Saskatoon - Amelanchier alnifolia
- Sauce-alone – Alliaria petiolata
- Scarlet berry – Solanum dulcamara
- Scoke – Phytolacca americana
- Scotch cap – Rubus occidentalis
- Scrambled eggs – Corydalis aurea
- Scurvy grass – Barbarea verna
- Serviceberry – Amelanchier
- Common serviceberry – Amelanchier arborea
- Downy serviceberry – Amelanchier arborea
- Shadblow serviceberry – Amelanchier canadensis
- Shadblow – Amelanchier canadensis
- Shadbush – Amelanchier canadensis
- Silkweed – Asclepias syriaca
- Swamp silkweed – Asclepias incarnata
- Virginia silkweed – Asclepias syriaca
- Skunkweed – Symplocarpus foetidus
- Snakeberry – Solanum dulcamara
- Snowdrop – Galanthus
- Sorrel – Oxalis
- Redwood sorrel – Oxalis oregana
- Speedwell
- Corn speedwell – Veronica arvensis
- Wall speedwell – Veronica arvensis
- Spoolwood – Betula papyrifera
- Squaw bush – Cornus amomum
- Stammerwort – Ambrosia artemisiifolia
- Star-of-Persia – Allium cristophii
- Stickweed – Ambrosia artemisiifolia
- Strawberry – Fragaria × ananassa
- Strawberry tree – Arbutus unedo
- Strawberry tree 'Marina' – Madrone – Arbutus 'Marina'
- Sugarcane – Saccharum
- Swallow-wort
- Orange swallow-wort – Asclepias tuberosa
- Silky swallow-wort – Asclepias syriaca
- Sneezeweed – Achillea ptarmica
- Sneezewort – Achillea ptarmica
- Sunflower – Helianthus annuus
- Sugarplum – Amelanchier canadensis
- Soldier's woundwort – Achillea millefolium
- Stag bush – Viburnum prunifolium
- Swallow-wort
- Orange swallow-wort – Asclepias tuberosa
- Silky swallow-wort – Asclepias syriaca
- Sweet potato – Ipomoea batatas
- Sweet potato vine – Ipomoea batatas
- Swinies – Sonchus oleraceus
- Sycamore – Platanus spp.
- Sycamore (California) – Platanus racemosa
- Sycamore (Arizona) – Platanus wrighitii
- Sycamore (American) – Platanus occidentalis
T
- Tansy
- Common tansy – Tanacetum vulgare
- White tansy – Achillea ptarmica
- Wild tansy – Ambrosia artemisiifolia
- Tea – Camellia sinensis
- Appalachian tea – Ilex glabra
- Thimbleberry – Rubus occidentalis
- Thimbleweed – Rudbeckia laciniata
- Thousand-leaf – Achillea millefolium
- Thousand-seal – Achillea millefolium
- Tassel weed – Ambrosia artemisiifolia
- Thistle – (Several genera)
- Annual sow thistle – Sonchus oleraceus
- California thistle – Cirsium arvense
- Canada thistle – Cirsium arvense
- Corn thistle – Cirsium arvense
- Corn sow thistle – Sonchus arvensis
- Creeping thistle – Cirsium arvense
- Cursed thistle – Cirsium arvense
- Field sow thistle – Sonchus arvensis
- Green thistle – Cirsium arvense
- Hard thistle – Cirsium arvense
- Hare's thistle – Sonchus oleraceus
- Milk thistle – Sonchus oleraceus
- Nodding thistle – Carduus nutans L.
- Perennial thistle – Cirsium arvense
- Prickly thistle – Cirsium arvense
- Sharp-fringed sow Thistle – Sonchus asper
- Small-flowered Thistle – Cirsium arvense
- Spiny sow thistle – Sonchus asper
- Spiny-leaved sow Thistle – Sonchus asper
- Swine thistle – Sonchus arvensis
- Tree sow thistle – Sonchus arvensis
- Way thistle – Cirsium arvense
- Thyme – Thymus, specifically Thymus vulgaris
- Tickleweed – Veratrum viride
- Tobacco plant – Nicotiana
- Tomato – Solanum lycopersicum
- Toothwort – Cardamine concatenata
- Cutleaf toothwort – Cardamine concatenata
- Purple-flowered Toothwort – Cardamine concatenata
- Touch-me-not – Cardamine hirsuta
- Traveller's joy – Clematis virginiana
- Tread-softly – Solanum carolinense
- Tree tobacco – Nicotiana glauca
- Trillium – Trillium spp.
- Western trillium – Trillium ovatum
- Western wake robin – Trillium ovatum
- White trillium – Trillium grandiflorum
- Tuber-root – Asclepias tuberosa
- Tulip – Tulipa
- Tulsi – Ocimum santalum
U
V
- Blackhaw viburnum – Viburnum prunifolium
- Leatherleaf viburnum – Viburnum rhytidophyllum
- Violet – (several genera)
- Damask violet – Hesperis matronalis
- Dame's violet – Hesperis matronalis
- Violet bloom – Solanum dulcamara
- Virgin's bower – Clematis virginiana
- Virginia virgin's bower – Clematis virginiana
W
- Walnut (California walnut) – Juglans californica
- Walnut – Juglans sp.
- Waybread – Plantago major
- Western redbud – Cercis occidentalis
- Wheat – Triticum spp.
- White man's foot – Plantago major
- White-root – Asclepias tuberosa
- Wild cotton – Apocynum cannabinum, Asclepias syriaca
- Wild hops – Clematis virginiana
- Willow – Salix
- Coyote willow – Salix exigua
- Goodding willow – Salix gooddingii
- Red willow – Cornus amomum
- Rose willow – Cornus amomum
- Windroot – Asclepias tuberosa
- Wineberry – Rubus phoenicolasius
- Winterberry – Ilex verticillata
- American winterberry – Ilex verticillata
- Evergreen winterberry – Ilex glabra
- Virginia winterberry – Ilex verticillata
- Wintercress – Barbarea vulgaris
- Early wintercress – Barbarea verna
- Woodbine – Clematis virginiana
- Wormwood
- Roman wormwood – Ambrosia artemisiifolia, Corydalis sempervirens
- Wound rocket – Barbarea vulgaris
X
Y
- Yarrow – Achillea
- Common yarrow – Achillea millefolium
- Fernleaf yarrow – Achillea filipendulina
- Sneezewort yarrow – Achillea ptarmica
- Woolly yarrow – Achillea tomentosa
- Yellow fieldcress – Rorippa sylvestris
- Yellowwood – Cladrastis lutea, Maclura pomifera
- Yellow coneflower – Echinacea paradoxa
- Yam - Dioscora; (in North America) Ipomoea batatas
Z
- Zedoary – Curcuma zedoaria