MDA warns of dangers of poison hemlock

St. Paul, MN: The Minnesota Department of Agriculture (MDA) is warning residents about the dangers of poison hemlock (Conium maculatum), a toxic member of the carrot family. Residents should be on the lookout for the weed, take extra precautions when handling it, and not ingest any parts of the plant.

Poison hemlock can grow up to eight feet tall. The flowers are small and white with umbrella shaped clusters on the tops of stems, and it is currently in bloom in parts of the state. The stems are hairless and have purple blotches. The plants emit an odor. The flowers of poison hemlock look similar to wild carrot (Daucus carota) and water hemlock (Circuta maculata). However, the fern-like leaves and purple blotches on the stems of poison hemlock distinguish it from these related species.

All parts of poison hemlock (leaves, stem, flowers, and roots) are poisonous. If a person may have ingested poison hemlock, Minnesota Poison Control should be called immediately at 1-800-222-1222. If the individual is unresponsive or having trouble breathing, call 911. People have also reportedly been poisoned by handling the plants. A person should avoid exposure by wearing a long-sleeved shirt, long pants, and gloves. If an animal may have ingested poison hemlock, contact your local veterinarian.