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.
White Point-vetch
Oxytropis sericea Nutt.
Oxytropis sericea, or white locoweed, is a toxic North American perennial legume that poisons livestock.
Showy Locoweed
Oxytropis splendens Douglas
Oxytropis splendens Douglas is a nitrogen-fixing flowering perennial, good for revegetation, that is potentially toxic.
provision tree
Pachira aquatica Aubl.
Pachira aquatica, commonly confused with the cultivated money tree Pachira glabra, is an edible nut-bearing tropical tree.
woolly ragwort
Packera dubia (Spreng.) Trock & Mabb.
Packera dubia is a low-growing perennial aster native to central and southeastern US coastal areas, with stable populations.
Butterweed
Packera glabella (Poir.) C.Jeffrey
Packera glabella is a United States native winter annual weed that acts as an invasive toxic species in agricultural and disturbed moist habitats.
roundleaf ragwort
Packera obovata (Muhl. ex Willd.) W.A.Weber & Á.Löve
Packera obovata is an erect perennial herb native to North America that flowers in early spring and spreads by seed and vegetatively.
American ginseng
Panax quinquefolius L.
Panax quinquefolius L. (American ginseng) is a perennial araliaceous herb with a long history of cultivation and folk medicinal use.
Iceland Poppy
Papaver nudicaule L.
Papaver nudicaule, the Iceland poppy, is a hardy boreal flowering plant popular in cultivation for cut flowers.
Halberd cacalia
Parasenecio hastatus (L.) H.Koyama
Parasenecio hastatus is a toxic flowering plant of genus Parasenecio found in China and East Asia.
Herb Paris
Paris quadrifolia L.
Paris quadrifolia L. is a poisonous perennial herb, with ecology involving rodent fruit removal and seed dispersal.
Granadilla
Passiflora ligularis Juss.
Passiflora ligularis, sweet granadilla, is an invasive passionflower cultivated for its sweet fruit globally.
wild parsnip
Pastinaca sativa L.
Pastinaca sativa L. (parsnip) is an edible Eurasian biennial root vegetable with phototoxic sap and a sweet cooked flavor.
harmel
Peganum harmala L.
Peganum harmala, or Syrian rue, is a perennial herb with alkaloid-rich seeds, used in traditional practices and regulated as an invasive weed.
Green Arrow Arum
Peltandra virginica (L.) Schott
Peltandra virginica is an emergent perennial wetland herb native to eastern North America, that contains calcium oxalate crystals and is pollinated by chloropid flies.
Green Alkanet
Pentaglottis sempervirens (L.) Tausch ex L.H.Bailey
Green alkanet (Pentaglottis sempervirens) is a perennial herb with edible blue flowers and toxic roots, native to southwestern Europe.
beefsteak plant
Perilla frutescens (L.) Britton
Perilla frutescens is an annual plant native to East and South Asia, widely grown as edible for humans but toxic to livestock.
Avocado
Persea americana Mill.
Persea americana, the avocado, is a tree with documented animal toxicity and a long history of cultivation across the Americas and beyond.
Arctic Butterbur
Petasites frigidus (L.) Fr.
Petasites frigidus, Arctic sweet coltsfoot, is a Northern Hemisphere perennial herb with edible parts that carry toxic alkaloid risks.
Common Butterbur
Petasites hybridus (L.) G.Gaertn., B.Mey. & Scherb.
Petasites hybridus, commonly called butterbur, is a dioecious herb with noted toxic properties and a history of traditional medicinal use.
Giant Butterbur
Petasites japonicus (Siebold & Zucc.) Maxim.
Petasites japonicus is a dioecious herbaceous perennial in Asteraceae, native to East Asia and introduced elsewhere, containing toxic pyrrolizidine alkaloids.
harding grass
Phalaris aquatica L.
Phalaris aquatica L. is a perennial bunch grass originating from Southern Europe and the Caucasus, with some reported toxicity to grazing animals.
Runner bean
Phaseolus coccineus L.
Phaseolus coccineus L., or runner bean, is a bean species grown both as an ornamental and edible crop with many cultivars and culinary uses across the world.
Common Bean
Phaseolus vulgaris L.
Phaseolus vulgaris L., the common bean, is a widely cultivated food legume with toxic raw beans and multiple non-food uses.
heart-leaf philodendron
Philodendron hederaceum (Jacq.) Schott
Philodendron hederaceum is a popular easy-care ornamental evergreen climbing houseplant with calcium oxalate toxicity.
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