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Poison Hemlock

Conium maculatum

Plant Description

Bright green fern-like leaves; flowers in numerous small, umbrella-shaped clusters of tiny white flowers.

Plant Details

Life Forms
ODA Listing
Soil and Moisture Conditions
Suggested Actions
Shade Preference
Mature Height 6-10'
Distribution widespread in Oregon
Control Mowing is not recommended due to toxins. For small populations, wear gloves and long sleeves to pull or dig up plants, including entire root. Wash skin after working with poison hemlock. Follow label directions when using chemicals.
Reproduction and Spread Reproduces by seeds. Produces up to 40,000 seeds per plants, plants are moved by water, animals, and machinery.
Introduced introduced from Eurasia
Look Alikes cow parsnip, Queen Anne's Lace
Impact Acutely toxic to humans, livestock and wildlife; call for help if poisoning is suspected. Aggressive growth, crowds out native vegetation.
More Info
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