Vascular Plants of North Carolina
Account for Poison-hemlock - Conium maculatum   L.Only member of Conium in NC.
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Section 6 » Order Apiales » Family Apiaceae
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AuthorL.
DistributionMostly in the Piedmont, scattered in the Mountains, scarce in the Coastal Plain. First collected in 1949 in waste ground west of Greensboro, Guilford County.

Native of Eurasia; in N.A. essentially throughout.
AbundanceUncommon to locally fairly common in the Piedmont, rare to uncommon in the Mountains and Coastal Plain.
HabitatRoadsides, pastures, fencerows, creek and stream banks, waste ground, yard weed, railroad.
PhenologyFlowering and fruiting May-July.
IdentificationPoison-hemlock is a rank plant up to 6 feet tall, but often only 3-5 feet tall. Stems typically are spotted and glabrous. The leaves are large, cut fernlike, the outline triangular, the segments with narrow lobes. The inflorescences are prominent, compound, the flowers white. All parts are toxic.
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State RankSE
Global RankG5
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