Conium maculatum (Poison Hemlock) is a species of biennial herb in the family Apiaceae. They have a self-supporting growth form. They are native to Western North America. They have simple, broad leaves. Flowers are visited by Speyeria hesperis, Callophrys gryneus siva, Blue Copper, and Callophrys eryphon. Individuals can grow to 1.3 m.
EOL has data for 21 attributes, including: