description Tansy Ragwort Overview
Tansy ragwort (Jacobaea vulgaris, formerly Senecio jacobaea) is a toxic flowering plant in the daisy family, native to Europe and introduced to North America, Australia, and New Zealand. It contains pyrrolizidine alkaloids that cause cumulative, irreversible liver damage, and it is particularly dangerous to grazing horses and cattle, which may consume it when it is mixed into hay. Its yellow, daisy-like flower heads appear in dense clusters.
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