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Toxicity. The seeds and pods of wisteria are potentially extremely dangerous to your pooch, as they can be to people. The seeds and pods have toxic lectins, found in most types of beans.Lectins are toxic because they clump erythrocytes.isteria's pink, purple or white blooms produce highly toxic seeds. Medioimages/Photodisc/Photodisc/Getty Images. Wisterias (Wisteria spp.) grow in U.S. Department of Agriculture plant hardiness zones 4 through 9, depending on species and are favored by their fragrant, colorful blooms and climbing ability.
1 Euonymus europaeus (commonly known as spindle, European spindle or spindle tree). 2  The fruit is poisonous, containing amongst other substances, the alkaloids theobromine and caffeine, as well as an extremely bitter terpene. 3  Poisonings are more common in young children, who are enticed by the brightly coloured fruits.any of the known plant defense compounds primarily defend against consumption by insects, though other animals, including humans, that consume such plants may also experience negative effects, ranging from mild discomfort to death. Many of these poisonous compounds also have important medicinal benefits.