Crook County Weeds

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    • Weeds
      • County Declared Species
      • State Designated Species
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      • Wyoming Partners
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  • Home
  • News
  • Programs
  • Weeds
    • County Declared Species
    • State Designated Species
  • Other Resources
    • Wyoming Partners
    • PDF Downloads

poison hemlock

Details and Information

Common Names

Poison parsley, Deadly hemlock, Spotted hemlock, Wild hemlock, Carrot fern

Description

Height: 3 - 10 feet

Flower Color: White

Leaves: Bright green, finely divided (looks similar to carrot tops)

Habitat: Riparian areas, irrigation ditches, roadsides, fence lines

Growing Season: Early spring through summer (peak flowering in June - July)

Best Time to Treat: Late winter to early spring 

Other Facts

  • Highly toxic to humans and livestock
  • Every part of the plant is poisonous  
  • Can cause fatal respiratory failure 
  • Invasive biennial plant 

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