Conium maculatum (Poison Hemlock)
|Also known as:|
|Habitat:||sun; moist soil, along shores, fields, roadsides, disturbed soil|
|Bloom season:||June - August|
|Plant height:||3 to 8 feet|
|Wetland Indicator Status:||GP: FACW MW: FACW NCNE: FACW|
|MN county distribution (click map to enlarge):|
|National distribution (click map to enlarge):|
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Flowers are in flat clusters (umbels) about 3 inches across. Individual flowers are about 1/8 inch across and have 5 white petals of unequal size, usually notched and folded lengthwise. There are 5 stamens with white to yellowish tips, 1 between each petal. One plant has many clusters, at the ends of branching stems. The stems persist through the winter.
Leaves and stem:
Leaves are 2 or 3 times compound, up to 12 inches long and wide, generally triangular in outline, becoming smaller as they ascend the stem. Leaflets are divided and fern-like, to 2 inches long and 1 inch wide.
Notes:All parts of Poison Hemlock are deadly poisonous. This plant is easy to distinguish from other members of the carrot family by the feathery, double compound leaves, and the purple spotted stem.
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Photos taken at Long Lake Regional Park, New Brighton, MN July 2007 and June-July 2008
Have you seen this plant in Minnesota, or have any other comments about it?