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Noun: California fern
  1. 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
    - hemlock, poison hemlock, poison parsley, Nebraska fern, winter fern, Conium maculatum

Type of: poisonous plant

Part of: Conium, genus Conium