- hemlock, poison hemlock, poison parsley, California fern, Nebraska fern, winter fern, Conium maculatum - 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
--1 is a kind of poisonous plant
--1 is a member of Conium, genus Conium