Poisonous & Toxic Species
Never touch, taste, or consume any species you cannot positively identify. This guide is for educational purposes only. When in doubt, consult a local expert. Use the iNature app for quick AI-powered identification in the field.
arrow poison plant
Pleradenophora bilocularis (S.Watson) Esser & A.L.Melo
Pleradenophora bilocularis is a medium shrub native to the southwestern US and northwestern Mexico, with toxic sap used historically on arrowheads.
Nootka rose
Rosa nutkana C.Presl
Rosa nutkana, or Nootka rose, is a wild North American rose used for food, medicine, landscaping, and ornament.
Itchgrass
Rottboellia cochinchinensis (Lour.) Clayton
Rottboellia cochinchinensis is a pantropical annual C4 grass that is a major weed of many tropical crops.
yellow mombin
Spondias mombin Jacq.
Spondias mombin is an edible deciduous tree in the Anacardiaceae family with food and traditional medicine uses.
red mombin
Spondias purpurea L.
Spondias purpurea L., or jocote, is a tropical fruit tree native to the Americas, grown for its edible plum-like fruit.
feverfew
Tanacetum parthenium (L.) Sch.Bip.
Tanacetum parthenium, feverfew, is an herbaceous perennial with described characteristics, uses, and adverse effects.
Roman Nettle
Urtica pilulifera L.
Urtica pilulifera (Roman nettle) is a stinging plant native from the Mediterranean to Iran, introduced to northwest Europe, now extirpated from Britain.
mustang grape
Vitis mustangensis Buckley
Vitis mustangensis, or mustang grape, is a woody dioecious grape used for culinary products and wool dye.
rosary pea
Abrus precatorius L.
Abrus precatorius (jequirity bean/rosary pea) is a toxic, invasive pantropical climber with a history of traditional medicinal use.
sycamore maple
Acer pseudoplatanus L.
Acer pseudoplatanus (sycamore) is a large deciduous maple native to central/eastern Europe and western Asia, widely introduced and often invasive elsewhere.
red maple
Acer rubrum L.
Acer rubrum L. (red maple) is a common, highly variable deciduous tree native to eastern North America, widely cultivated for its fall colour.
Yellow Monkshood
Aconitum anthora L.
Aconitum anthora L. is a yellow-flowered Aconitum species native mainly to European mountains and northern Asia, with a history of medicinal use.
Monk's-hood
Aconitum napellus L.
Aconitum napellus (monkshood/wolfsbane) is an extremely toxic European perennial flowering plant grown ornamentally.
red baneberry
Actaea rubra (Aiton) Willd.
Actaea rubra (red baneberry) is a toxic North American perennial herb, sometimes grown in shade gardens.
Goutweed
Aegopodium podagraria L.
Aegopodium podagraria L. is an herbaceous perennial with edible young leaves, medicinal uses, and invasive ornamental potential.
corn cockle
Agrostemma githago L.
Agrostemma githago L., common corncockle, is a poisonous flowering plant now widespread as a weed in temperate regions with documented biological activities.
Garlic
Allium sativum L.
Allium sativum, commonly garlic, is a widely cultivated perennial bulb plant with described ecology, adverse effects, cultivation details and uses.
Quiver Tree
Aloidendron dichotomum (Masson) Klopper & Gideon F.Sm.
Aloidendron dichotomum, the quiver tree, is a tall branching succulent native to Southern Africa, cultivated worldwide for landscaping.
Redroot Amaranth
Amaranthus retroflexus L.
Amaranthus retroflexus L. is an annual herb that is widespread globally, with potential toxicity to livestock.
New York fern
Amauropelta noveboracensis (L.) S.E.Fawc. & A.R.Sm.
Amauropelta noveboracensis, commonly called New York fern, is a distinctive understory fern that can form extensive clonal colonies.
fly poison
Amianthium muscitoxicum (Walter) A.Gray
Amianthium muscitoxicum is a poisonous eastern US native perennial, historically used as a fly poison by early colonists.
Cow Parsley
Anthriscus sylvestris (L.) Hoffm.
Cow parsley (Anthriscus sylvestris) is a common wild herb, invasive outside its native range, with risky foraging due to toxic lookalikes.
spreading dogbane
Apocynum androsaemifolium L.
Apocynum androsaemifolium is a poisonous perennial herb widespread across North America and northeast Mexico with a history of human medicinal and practical use.
western columbine
Aquilegia formosa Fisch. ex DC.
Aquilegia formosa (crimson columbine) is a hummingbird-pollinated North American perennial herb with edible flowers and toxic seeds.
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