List of Poisonous Plants

  • 4-O’Clock Flower (See Marvel of Peru.)
  • Ackee[1] (Blighia sapida)
  • Acokanthera (See also “Curare” and Nux Vomica.)
    • Poison-Arrow Plant (Acokanthera oblongifolia)[2]
    • Poison Bush, Round-Leaved (Acokanthera rotundata)
  • Aconite (See Monkshood.)
  • Almond, Bitter[3] (Prunus dulcis amara)
  • Amaryllis (Amaryllis belladonna) (See Lily: Jersey Lily.)
  • Angel Wings (Caladium bicolor)
  • Angel’s Tears (See Angel’s Trumpets: Brazilian White.)
  • Angel’s Trumpets (Brugmansia arborea)
    • Brazilian White (Brugmansia suaveolens)
    • Golden (Brugmansia aurea)
    • Red (Brugmansia sanguinea)
    • Vulcan (Brugmansia vulcanicola)
  • Anthurium
    • Tailflower (Anthurium scherzerianum)
    • Pheasants Tail (Anthurium schlechtendalii)
  • Antiaris (Antiaris toxicaria)
  • Apples[3] (Malus domestica)
  • Apricot[3] (Prunus armeniaca)
  • Arnica (Arnica montana)
  • Arrow-Leaf Elephant Ear (Xanthosoma sagittifolium)
  • Arrowroot, Florida (Zamia integrifolia)[4] (Not to be confused with Maranta arundinacea, which is also called “Arrowroot.” Maranta is edible and was actually used as a topical antidote for various spear poisons.)
  • Asian Bleeding Heart (Lamprocapnos spectabilis)[5]
  • Asparagus (For Garden Asparagus — Asparagus officianalis — see also Allergy-Triggering Plants.)
    • Foxtail Fern (Asparagus densiflorus)
    • Sprenger’s (Asparagus aethiopicus)
  • Autumn Crocus/Meadow Saffron/Naked Ladies (Colchicum autumnale)
  • Azalea (See also Rhododendron.)
    • Azalea Indica (Rhododendron simsii)[6]
    • Japanese (Rhododendron tsutsusi)
  • Balsam Poplar (Populus balsamifera)
  • Baneberry (Actaea spicata) (See also Doll’s Eyes.)
  • Baneberry, White (See Doll’s Eyes.)
  • Be-Still Tree (Thevetia peruviana) (See also Lucky Nut.)
  • Beech, European (Fagus sylvatica)
  • Bindweed
    • Black (Dioscorea communis)[7]
    • Field (Convolvulus arvensis)
  • Bittersweet (See Nightshades: Woody Nightshade.)
  • Black Cohosh (Actaea racemosa)[8] (See also Blue Cohosh.)
  • Black Locust/False Acacia (Robinia pseudoacacia)
  • Blood Drops (Adonis annua)
  • Bloodroot (Sanguinaria canadensis)
  • Bluebell, Common (Hyacinthoides non-scripta) (See also Hyacinth.)
  • Blue Cohosh (Caulophyllum thalictroides)
  • Boldo (Peumus boldus)
  • Borage (Borago officinalis)
  • Box, Common/Boxwood (Buxus sempervirens)[9]
  • Bracken/Eagle Fern (Pteridium aquilinum)
  • Broom (Cytisus scoparius)
  • Bryony
    • Black (See Bindweed.)
    • White (See Mandrake.)
  • Buckeye
    • California (Aesculus californica)
    • Ohio (Aesculus glabra)
    • Horse Chestnut (Aesculus hippocastanum)
    • Painted (Aesculus sylvatica)
  • Buckthorn
    • Alder (Frangula alnus)
    • California (Frangula californica)
    • Common (Rhamnus cathartica)
    • Red (Rhamnus rubra)
    • Saw-Leaf (Rhamnus serrata)
  • Bulb-Bearing Water Hemlock (See Hemlock: Bulb-Bearing Water Hemlock.)
  • Buttercup
    • California (Ranunculus californicus)
    • Common (Ranunculus acris)
    • Creeping (Ranunculus repens)
    • Western (Ranunculus occidentalis)
  • Calabar Bean (Physostigma venenosum)
  • Canary Grass/Harding Grass (Phalaris aquatica)[10]
  • Castor Bean (Ricinus communis)[11]
  • Catalpa Tree, Southern (Catalpa bignonioides) — Roots
  • Cerbera (See Sea Mango and Suicide Tree.)
  • Ceriman (Monstera deliciosa)[12]
  • Chalice Vine (See Solandra.)
  • Cherry, Wild/Gean (Prunus avium)
  • Chervil, Rough (Chaerophyllum temulum)
  • Chestnut, Horse. (See Buckeye.)
  • Chinaberry (Melia azedarach)
  • Chinese Lantern (Physalis alkekengi)[13]
  • Christmas Candle (Euphorbia tithymaloides)
  • Cocklebur (Xanthium albinum)
  • Coffee-Tree, Kentucky (Gymnocladus dioicus)
  • Columbine (Aquilegia vulgaris)
  • Comfrey/Boneset (Symphytum officinale)
  • Copperleaf (Acalypha wilkesiana) (See also Allergy-Triggering Plants.)
  • Copperweed (Oxytenia acerosa)
  • Coralbush (Jatropha multifida) (See also Poison Nut.)
  • Corkwood (Duboisia myoporoides)
  • Cowbane (Cicuta virosa)[14] (See Hemlock: Northern Water Hemlock.)
  • Crazyweed (See Locoweed.)
  • Croton, Garden (Codiaeum variegatum) (See also Allergy-Triggering Plants.)
  • Crown Flower/Giant Calotrope (Calotropis gigantea)
  • “Curare,” Arrow Poison (See also Acokanthera.)
    • Kombe Arrow Poison (Strophanthus kombe)
    • Strychnine Curare (Strychnos toxifera) (See also Monkey Orange, Nux Vomica, and Saint Ignatius Bean.)
    • Tube Curare (Chondrodendron tomentosum)
  • Cyclamen
    • Alpine (Cyclamen alpinum)
    • Eastern Sowbread (Cyclamen coum)
    • Purple (Cyclamen purpurascens)
    • Sowbread (Cyclamen hederifolium)
  • Daffodil
    • Angel’s Tears (Narcissus triandrus)
    • Autumn Narcissus (Narcissus serotinus)
    • Bunch-Flowered Daffodil (Narcissus tazetta)
    • Jonquil (Narcissus jonquilla)
    • Lent Lily/Wild Daffodil (Narcissus pseudonarcissus)
    • Paperwhite (Narcissus papyraceus)
    • Petticoat Daffodil (Narcissus bulbocodium)
    • Poet’s Daffodil (Narcissus poeticus)
  • Daphne
    • February/Mezereon (Daphne mezereum)
    • Flax-Leaved (Daphne gnidium)
    • Pontic (Daphne pontica)
    • Rose (Daphne cneorum)
    • Spurge-Laurel/Wood-Laurel (Daphne laureola) (See also Sun Spurge. For Wood Spurge, see also Allergy-Triggering Plants.)
    • Winter (Daphne odora)
  • Datura
    • Devil’s Trumpet (Datura metel)
    • Jimsonweed/Devil’s Snare/Thorn Apple (Datura stramonium)
    • Sacred Datura (Datura wrighti)
    • Toloache (Datura innoxia)
    • Torna-Loco, “Maddening Plant” (Datura ceratocaula)
  • Deadly Nightshade (See Nightshades: Deadly Nightshade.)
  • Death Camas
    • Desert (Toxicoscordion brevibracteatum)
    • Foothill (Toxicoscordion paniculatum)[15]
    • Giant (Toxicoscordion exaltatum)
    • Meadow (Toxicoscordion venenosum)
    • Pine-Barren (Stenanthium leimanthoides)
    • Small-Flower (Toxicoscordion fontanum)
  • Desert Rose (Adenium obesum)
  • Devil Bean (See Rattleweed.)
  • Devil’s Apple (Solanum linnaeanum)
  • Devil’s Ivy (Epipremnum aureum) (See also Taro.)
  • Devil’s Backbone (Bryophyllum daigremontianum)
  • Devil’s Snare (See Jimsonweed.)
  • Digitalis (See Foxglove.)
  • Dogwood (Swida)
    • Common (Cornus sanguinea)
    • Northern Swamp (Cornus racemosa)
    • Pagoda (Cornus alternifolia)
    • Red Osier (Cornus sericea)
    • Roughleaf (Cornus drummondii)
    • Roundleaf (Cornus rugosa)
    • Stiff/Swamp (Cornus foemina)
  • Doll’s Eyes/White Baneberry (Actaea pachypoda) (See also Baneberry.)
  • Doubting Knight Spur (Consolida ajacis)[16] (See also Larkspur.)
  • Dropwort (See Hemlock: Water Hemlock.)
  • Dumbcane (Dieffenbachia seguine)[17]
  • Dutchman’s Breeches (Dicentra cucullaria)
  • Dwale (See Nightshades.)
  • Eggplant[18] (Solanum melongena)
  • Elderberry[19]
    • American (Sambucus canadensis)
    • European (Sambucus nigra)
  • English Ivy. (See Ivy, Common.)
  • Entada (Entada scandens)(Used as fishing poisons.)
    • African Dream/Cacoon Vine (Entada rheedii)
    • Box Bean/St. Thomas Bean (Entada phaseoloides)
    • Sea Bean (Entada gigas)
  • False Acacia (See Black Locust.)
  • Fel-Wort (Swertia perennis)
  • Figwort
    • Black (Scrophularia atrata)
    • California (Scrophularia californica)
    • Common (Scrophularia nodosa)
    • Green (Scrophularia umbrosa)[20]
    • Lance-Leaf (Scrophularia lanceolata)
    • Late (Scrophularia marilandica)
    • Water (Scrophularia auriculata)
    • Yellow (Scrophularia vernalis)
  • Firethorn, Red (Pyracantha coccinea)[21]
  • Fish-Poison Tree (Barringtonia asiatica)
  • Foxglove
    • Purple (Digitalis purpurea)
    • Woolly (Digitalis lanata)
  • Ginkgo (Ginkgo biloba) — Seeds (See also “Top 25 Herbs For Treating (& Avoiding) Alzheimer’s Dementia.”)
  • Gooseberry, Cape (Physalis peruviana) (See also Chinese Lantern.)
  • Gorse, Common (Ulex europeaus)
  • Greasewood (Sarcobatus vermiculatus)
  • Guelder rose (Viburnum opulus)[22]
  • Gumtree/Milk Tree (Sapium glandulosum)
  • Hawthorn, Common (Crataegus monogyna)
  • Hellebore
    • Black (Helleborus niger)
    • False (Veratrum viride)
    • Green (Helleborus viridis)
    • White (Veratrum album)
  • Hemlock (See also Henbane.)
    • Bulb-Bearing Water Hemlock (Cicuta bulbifera)
    • Hemlock/Poison Hemlock (Conium maculatum)
    • Northern Water Hemlock/Cowbane (Cicuta virosa)
    • Spotted Water Hemlock (Cicuta maculata)
    • Water Hemlock/Dropwort (Oenanthe crocata)
  • Henbane (Hyoscyamus niger)
  • Hoary Alyssum (Berteroa incana)
  • Holly
    • American (Ilex opaca)
    • English (Ilex aquifolium)
    • Evergreen Winterberry (Ilex glabra)
    • Meadow (Ilex decidua)
    • Mountain (Ilex mucronata)
    • Mountain Winterberry (Ilex montana)
    • Yerba Mate[23] (Ilex paraguariensis)
  • Honeysuckle
    • Common Honeysuckle (Lonicera periclymenum)
    • Common Snowberry (Symphoricarpos albus)
  • Horse-Eye Bean (Mucuna urens) (For Velvet Bean, see Allergy-Triggering Plants.)
  • Horseradish (Armoracia rusticana)[24]
  • Hyacinth (Hyacinthus orientalis) (See also Bluebell.)
  • Hydrangea
    • French (Hydrangea macrophylla)
    • Panicled (Hydrangea paniculata)
    • Smooth (Hydrangea arborescens)
  • Indian Belladonna (Atropa acuminata) (See also Deadly Nightshade.)
  • Indian Tobacco (Lobelia inflata)
  • Iris
    • Croatian/Bearded (Iris croatica)[25]
    • Dwarf Crested (Iris cristata)
    • Siberian/Beardless (Iris sibirica)
    • Yellow (Iris pseudacorus)
  • Ivy, Common (Hedera helix)
  • Jack-in-the-Pulpit (Arisaema triphyllum)
  • Japanese Sago Palm (Cycas revoluta)[26]
  • Jerusalem Cherry (Solanum pseudocapsicum)
  • Jessamine
    • Heartbreak Grass (Gelsemium elegans)
    • Orange (Cestrum aurantiacum)
    • Swamp/Rankin’s Trumpetflower (Gelsemium rankinii)
    • Willow-Leaved (Cestrum parqui)[27]
    • Yellow (Gelsemium sempervirens)
  • Kava Kava (Piper methysticum) (Mildly toxic)
  • Keluwak/Pangi (Pangium edule)
  • Kentucky Coffee-Tree (See Coffee-Tree, Kentucky.)
  • Kidney Beans (Phaseolus vulgaris)[28]
  • Laburnum/Golden Chain
    • Alpine (Laburnum alpinum)
    • Common (Laburnum anagyroides)
  • Lantana, West Indian (Lantana camara)
  • Larkspur (Delphinium staphisagria)
  • Laurel (See also Daphne.)
    • Cherry/Common/English (Prunus laurocerasus)
    • Mountain (Kalmia latifolia)[29]
    • Portuguese (Prunus lusitanica)
  • Leopard’s Bane (Doronicum orientale) (See also Arnica.)
  • Lichen
    • Common Orange (Xanthoria parietina)
    • Wolf (Letharia vulpina)
  • Lilac, West Indian (Tetrazygia bicolor)
  • Lily (See also Daffodil and Lily of the Valley.)
    • African (Agapanthus campanulatus)
    • Arum/Calla (Zantedeschia æthiopica)
    • Blue Bead (Clintonia borealis)
    • Bush/Kaffir (Clivia miniata)
    • Easter Lily (Lilium longiflorum)
    • Fire/Flame/Glory (Gloriosa superba)
    • Jersey Lily (Amaryllis belladonna)
    • Peace (Spathiphyllum wallisii)
    • Peruvian Lily (Alstroemeria aurea)
    • Rain (Zephyranthes atamasca)
    • Rose Rain (Zephyranthes rosea)
    • Stargazer (Lilium orientalis “Stargazer”)
    • Tiger (Lilium lancifolium)[30]
    • White Windflower (Zephyranthes candida)
    • Zephyr (Zephyranthes carinata)
  • Lily of the Valley (Convallaria majalis)
  • Locoweed/Crazyweed (For White Vetch, see Pea.)
    • Blue (Astragalus diphysus)
    • Field (Oxytropis campestris)
    • Four-Wing Poison Milkvetch (Astragalus tetrapterus)
    • Gravel Milkvetch (Astragalus sabulonum)
    • Milkvetch (Astragalus oxyphysus)
    • Mongolian Milkvetch (Astragalus propinquus)[31]
    • Purple (Oxytropis lambertii) (Also sometimes called “White Locoweed.”)
    • Silver-Leaved Milkvetch (Astragalus bisulcatus)
    • Spotted (Astragalus lentiginosus)
    • White (Oxytropis sericea)
    • Wooly (Astragalus mollissimus) (This is also sometimes called “Purple Locoweed.”)
  • Lucky Nut (Cascabela thevetia) (See also Be-Still Tree.)
  • Lupin, Garden (Lupinus polyphyllus)
  • Magnolia, Southern/Bull Bay (Magnolia grandiflora)
  • Manchineel Tree (Hippomane mancinella)
  • Mandrake
    • Autumn (Mandragora autumnalis)
    • Common (Mandragora officinarum)
    • False (Bryonia alba)[32]
    • English (Bryonia dioica)
  • Mangrove
    • Blinding Milky (Excoecaria agallocha)[33]
    • Gray (Avicennia marina)[34]
  • Marsh Marigold (Caltha palustris)[35]
  • Marvel of Peru/4-O’Clock Flower (Mirabilis jalapa)
  • Mayapple/American Mandrake (Podophyllum peltatum)
  • Milkvetch (See Locoweed.)
  • Milkweed, Blunt-Leaved (Asclepias amplexicaulis)
  • Mistletoe (Viscum album)
  • Monkey Orange
    • Black (Strychnos madagascariensis)
    • Spine-Leaf (Strychnos pungens)
  • Monkshood/Aconite/Wolf’s Bane (Aconitum napellus)[36] (See also Winter Aconite.)
    • Branched (Aconitum degenii)
    • Chinese (Aconitum carmichaelii)
    • European (Aconitum variegatum)
    • Garden (Aconitum plicatum)
    • Indian (Aconitum ferox)
    • Korean (Aconitum coreanum)
    • Southern Blue (Aconitum uncinatum)
    • Western (Aconitum columbianum)
    • Yellow (Aconitum anthora)
  • Moonseed, Common (Menispermum canadense)
  • Morning Glory
    • Common (Ipomoea purpurea)
    • Mexican (Ipomoea tricolor)
    • Pink (Ipomoea carnea)
  • Mushrooms
    • Amanita
      • Death Cap (Amanita phalloides)
      • Destroying Angel (Amanita virosa)
      • Fly Agaric (Amanita muscaria)
      • Fool’s Mushroom (Amanita verna)
      • North American Destroying Angel (Amanita bisporigera)
      • Panther Cap (Amanita pantherina)
    • Other
      • Autumn Skullcap (Galerina marginata)
      • Brown Roll Rim/Poison Pax (Paxillus involutus)
      • Carolina False Morel (Gyromitra caroliniana)
      • Conocybe Filaris (Pholiotina rugosa)
      • Deadly Cort (Cortinarius gentilis)
      • Deadly Dapperling (Lepiota brunneoincarnata)
      • Deadly Fiber-Cap (Inocybe erubescens)[37]
      • Deadly Galerina (Galerina sulciceps)
      • Deadly Webcap (Cortinarius rubellus)[38]
      • False Morel (Gyromitra esculenta)
      • Fenugreek Milkcap (Lactarius helvus)
      • Fool’s Funnel/Sweating Mushroom (Clitocybe rivulosa)
      • Fool’s Webcap (Cortinarius orellanus)
      • Ink Cap (Coprinopsis atramentaria)[39]
      • Ivory Funnel (Clitocybe dealbata)
      • Jack-O’-Lantern (Omphalotus olearius)
      • Parasol (Macrolepiota procera)
      • Poison Pie/Fair Cake (Hebeloma crustuliniforme)
      • Podostroma cornu-damae
      • Sickener (Russula emetica)
      • Yellow-Staining Milkcap (Lactarius vinaceorufescens)
  • Narcissus (See Hyacinth.)
  • Nightshades
    • Black Nightshade
      • American (Solanum americanum)
      • European (Solanum nigrum)
    • Deadly Nightshade/Dwale (Atropa belladonna)
    • Red Nightshade (Solanum villosum)
    • Woody Nightshade (Solanum dulcamara)
  • Nutmeg (Myristica fragrans)
  • Nux Vomica/Strychnine Tree (Strychnos nux-vomica)[40]
  • Oak Tree[41] (See also Allergy-Triggering Plants.)
    • English (Quercus robur)
    • Gambel (Quercus gambelii)
    • White (Quercus alba)
  • Oleander, Common (Nerium oleander)
  • Oleander, Yellow. (See Be-Still Tree and Lucky Nut.)
  • Opium (See Poppy, Opium.)
  • Ordeal Tree/Sea Mango (Cerbera manghas)[42]
  • Paper-Bark Tree (Melaleuca quinquenervia)
  • Parsley, Fool’s/Poison (Aethusa cynapium) (Not to be confused with edible Garden Parsley, Petroselinum crispum)
  • Pea (Not to be confused with the edible Pea, Pisum sativum.)
    • Everlasting (Lathyrus latifolius)
    • Grass/Blue Sweet (Lathyrus sativus)[43]
    • Sweet (Lathyrus odoratus)
  • Peach (Prunus persica)[44]
  • Peony
    • Chinese (Paeonia lactiflora)
    • Common (Paeonis officinalis)
  • Pepper, Chili (Capsicum annuum)[45]
  • Peruvian Lily (See also Lily: Peruvian.)
  • Peyote Cactus (Lophophora williamsii)[46]
  • Pilewort[47] (Ficaria verna)
  • Pitcheri (Duboisia hopwoodii)
  • Poison Berry (See Nightshades: Woody Nightshade.)
  • Poison Nut (Jatropha curcas) (See also Coralbush and Nux Vomica.)
  • Poison Leaf (Dichapetalum cymosum)
  • Poison Sumac/Thunderwood (Toxicodendron vernix) (For the less toxic Poison Ivy and Poison Oak, see Allergy-Triggering Plants.)
  • Pokeweed, American (Phytolacca americana)
  • Pong Pong (See Suicide Tree.)
  • Poppy, Mexican (Argemone mexicana)
  • Poppy, Opium (Papaver somniferum)
  • Potato[48] (Solanum tuberosum)
  • Pricklyburr (See Toloache.)
  • Privet, Garden (Ligustrum ovalifolium)
  • Ragwort (Jacobaea vulgaris)
  • Rattleweed/Devil Bean (Crotalaria retusa) (See also Locoweed.)
  • Redoul (Coriaria myrtifolia)
  • Rhododendron (See also Azalea.)
    • Alpine Rose (Rhododendron ferrugineum)
    • Azalea pontica[49] (Rhododendron flavum)[50]
    • Common (Rhododendron ponticum)
    • Labrador Tea, Western (Rhododendron columbianum)[51]
  • Rhubarb[52]
    • False (Rheum rhaponticum)
    • Garden (Rheum rhabarbarum)
  • Rosary Pea/Jequirity Bean (Abrus precatorius)[53]
  • Rock-Spray Cotoneaster (Cotoneaster horizontalis)
  • Rowan/Mountain-Ash (Sorbus aucuparia)
  • Rubber Vine (Cryptostegia grandiflora)
  • Rue (Ruta graveolens) (See also Allergy-Triggering Plants.)
  • Sage, Diviner’s (Salvia divinorum)
  • Saint Ignatius’s Bean (Strychnos ignatii) (See also Nux Vomica.)
  • Salt-Lover (Halogeton glomeratus)
  • Sea Mango (Cerbera manghas) (See Ordeal Tree. See also the related Suicide Tree.)
  • Snake’s Head/Cuckoo Pint (Arum maculatum)
  • Snake’s Head (Fritillaria meleagris)
  • Snowdrop (Galanthus nivalis)
  • Snow-on-the-Mountain (Euphorbia marginata)
  • Solandra[54]
    • Chalice Vine (Solandra nitida)
    • Golden Chalice-Vine (Solandra maxima)
    • Showy Chalice-Vine (Solandra grandiflora)
  • Solomon’s Seal
    • David’s Harp (Polygonatum multiflorum)
    • Garden (Polygonatum × hybridum)
    • Scented (Polygonatum odoratum)
    • Smooth (Polygonatum biflorum)
    • Whorled (Polygonatum verticillatum)
  • Sorrel[55]
    • Blue-Wood (Oxalis caerulea)
    • Four-Leaved (Oxalis tetraphylla)
    • Garden-Pink (Oxalis latifolia)
    • Lavender (Oxalis barrelieri)
    • Pink (Oxalis articulata)
    • Red-Flower (Oxalis bowiei)
  • Southern Magnolia (See Magnolia, Southern.)
  • Sowbread (See Cyclamen.)
  • Spearwort, Greater (Ranunculus lingua)
  • Spindle, European (Euonymus europaeus)
  • Spotted Water Hemlock (Cicuta maculata) (See Hemlock: Spotted Water Hemlock.)
  • Squill/Sea Onion (Drimia maritima)[56]
  • Star Fruit[57] (Averrhoa carambola)
  • Star of Bethlehem, Garden (Ornithogalum umbellatum)
  • Strychnine/Strychnos
    • Strychnos toxifera (See “Curare,” Arrow Poison: Strychnine Curare.)
    • Strychnos Ignatii (See Saint Ignatius Bean.)
    • Strychnos madagascariensis (See Monkey Orange: Black.)
    • Strychnos pungens (See Monkey Orange: Spine-Leaf.)
  • Strychnine Tree[58] (See Nux Vomica.)
  • Suicide Tree (Cerbera odollam) (See also the related Sea Mango.)
  • Sun Spurge (Euphorbia helioscopia) (For Poinsettia and Wood Spurge, see also Allergy-Triggering Plants.) (See also Snow-on-the-Mountain.)
  • Tallow, Chinese (Triadica sebifera)[59]
  • Taro (Colocasia esculenta) (See also Devil’s Ivy.)
  • Tie Bush (Wikstroemia indica)
  • Titan Arum (Amorphophallus titanum)
  • Tobacco, Virginia (Nicotiana tabacum)
  • Tomato[60] (Solanum lycopersicum)
  • Trumpet Flower (See either Angel’s Trumpet or Solandra. For Rankin’s Trumpet Flower, see Jessamine: Swamp.)
  • Tulip, Garden (Tulipa gesneriana)
  • Tung Tree (Vernicia fordii)
  • Tutu (Coriaria arborea)
  • Water Hemlock (Oenanthe crocata) (See Hemlock: Water Hemlock.)
  • Wayfarer Tree (Viburnum lantana)
  • West Indian Lantana (See Lantana, West Indian.)
  • West Indian Lilac (See Lilac, West Indian.)
  • White Baneberry (See Doll’s Eyes.)
  • White Snakeroot (Ageratina altissima)
  • Windflower (See Lily and Wood Anemone.)
  • Winter Aconite (Eranthis hyemalis) (See also Monkshood.)
  • Wisteria[61]
    • American (Wisteria frutescens)
    • Chinese (Wisteria sinensis)
    • Japanese (Wisteria floribunda)
    • Kentucky (Wisteria macrostachya)
  • Woad (Isatis tinctoria) — Toxic to kidneys in high doses.
  • Wolf’s Bane (See Monkshood.)
  • Wood Anemone/Windflower (Anemone nemorosa)
  • Wormwood (Artemisia absinthium)
  • Yam[62]
    • Air Potato (Dioscorea bulbifera)
    • Cushcush, Indian (Dioscorea trifida)
    • Lesser (Dioscorea esculenta)
    • Purple, Asian (Dioscorea alata)
    • White, African (Dioscorea rotundata)
    • Yellow, African (Dioscorea cayenensis)
  • Yew
    • Canadian (Taxus canadensis)
    • English (Taxus baccata)
    • Japanese (Taxus cuspidata)
    • Pacific (Taxus brevifolia)

Notes:

[1] Also spelled Akee.

[2] Also: Acokanthera schimperi.

[3] Seed kernels of (bitter) almonds, apples, apricots, (some) cherries, peaches, etc. contain the organic cyanide, Amygdalin. The worry is that this might be changed into the dangerous hydrogen cyanide inside of the body. On a person note, I have eaten apple seeds without any obvious ill-health effects. Though, I’m not necessarily holding myself up as a role model in this regard! (Perhaps the potency of the Amygdalin is prone to vary depending on the type of apple.) Some people use Amygdalin (also sometimes referred to as Laetrile or “Vitamin B17”) as a naturopathic cancer treatment.

[4] Also known as Koonti and Wild Sago. This plant is supposed to be edible once it is cooked. It’s the raw parts that are potentially dangerous.

[5] Also: Dicentra spectabilis.

[6] Also: Rhododendron indicum.

[7] Also: Tamus communis. Also known as Black Bryony.

[8] Also: Cimicifuga racemosa. The toxicity of this plant is disputed. Some use it in folk medicine. Not to be confused with Blue Cohosh (Caulophyllum thalictroides).

[9] This plant is, however, used medicinally and homeopathically.

[10] Also: Phalaris tuberosa.

[11] This plant is the source of the highly poisonous substance ricin.

[12] The fruit of this plant is sometimes eaten safely.

[13] Also known as Strawberry Ground Cherry.

[14] Also known as Northern Water Hemlock.

[15] Also: Zigadenus paniculatus.

[16] Also: Delphinium ajacis.

[17] Also: Dieffenbachia maculata.

[18] Inedible parts of the plant can contain toxins.

[19] Similarly to the Guelder Rose, uncooked berries contain cyanic compounds.

[20] Also known as Water Betony.

[21] Slightly toxic when uncooked.

[22] The berries are apparently mildly toxic if they are eaten without being cooked.

[23] Used as a health tonic in small doses. Can be toxic in larger amounts.

[24] Usually safe in small quantities, toxins can build if excessive amounts are consumed.

[25] Also: Iris germanica.

[26] Also known as Sotetsu.

[27] Also known as Green Cestrum.

[28] Raw beans contain the toxin phytohaemagglutinin. This is just another reason why the kitchen can be a dangerous place for a cognitively impaired person.

[29] Also known as the Calico Bush.

[30] Also: Lilium tigrinum.

[31] Also: Astragalus membranaceus.

[32] Also known as White Bryony and Wild Hops.

[33] Also known as the River-Poison Tree. It’s sap is toxic.

[34] Different species – possessing poisonous seeds.

[35] Not to be confused with the edible Common Marigold (Calendula officinalis).

[36] Also: Aconitum lycoctonum.

[37] Also: Inocybe patouillardii.

[38] Also: Cortinarius speciosissimus.

[39] Poisonous is combination with alcohol. Otherwise edible.

[40] Also: Strychnos colubrina. Also called “Crow Fig,” “False Upas Tree,” and “Kachita.”

[41] Tannins in acorns can cause kidney damage.

[42] Also: Cerbera tanghin.

[43] Also known as White Vetch. See also Locoweed.

[44] The kernels (or “stones”) contain a cyanide compound known as amygdalin.

[45] Needs to be cooked to be safely edible.

[46] Contains the psychedelic mescaline as well as the poisonous alkaloid hordenine.

[47] Also known as Lesser Celandine.

[48] Leaves and stems contain the toxin Solanine.

[49] Also known as Honeysuckle Azalea and Yellow Azalea.

[50] Also: Rhododendron luteum.

[51] Some people drink this.

[52] Leaves are toxic.

[53] This plant contains the highly poisonous substance albrin.

[54] Also known as Chalicevine.

[55] Many types of Sorrel are edible, e.g., Oxalis corniculata and Oxalis tuberosa – at least, in small quantities.

[56] Also: Urginea maritima and Urginea scilla.

[57] Dangerous for those with kidney problems.

[58] Elsewhere called “East-Indian Snakewood.”

[59] Also: Sapium sebiferum.

[60] Leaves and stem are mildly toxic.

[61] Contains the poisonous substance wisterin.

[62] Yam, like some other items on this list, is sometimes edible – if the stuff is properly prepared. Some sources include yams under the category of “famine food.” The only exception seems to be Chinese Yam (Dioscorea polystachya), which can usually be eaten raw.