poison parsley
large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous • Syn: hemlock, poison hemlock, California fern, Nebraska fern, winter fern, Conium maculatum • Hypernyms: poisonous plant • Member Holonyms: Conium, genus Conium
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