(Conium maculatum L.)
Parsley family - Apiaceae
Photo from Weeds of the West, revised ed.
Growth Habit: Biennial, erect to 10 feet tall.
Leaves: Shiny green, fern-like, finely divided 3 & 4 times. Lower leaves have long stalks clasping the stem. Upper leaves on short stalks. Musty oder.
Stem: Stout, branched, purple-spotted with distinct ridges.
Flower:Numerous umbrella shaped clusters of tiny white flowers without sepals. Clusters supported by stalks whorled at branch terminals.
Roots: Large white taproot.
Seeds: Paired, 1/8th inch long, ribbed, concave, light brown.
Reproduction: Seeds only.
Habitat: Dense stands along stream and ditch banks, field margins, transportation rights-of-way, pastures, meadows and waste places.
Biological Controls: Hemlock moth (Agonopterix alstroemeriana).
Herbicides: Escort and E2.
Caution: All plant parts are poisonous when eaten by livestock or humans.
Produced by Wyoming Weed & Pest Council in cooperation with Sandoz Crop Protection Corp.