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Northwest Michigan Invasive Species Network

Wild parsnip (Pastinaca sativa)
Introduced as a food source by European settlers. A cultivar of wild parsnip is still sold in some garden stores.
​
Why is it a problem?
Like most invasive plants, wild parsnip threatens to replace native plants in high quality natural areas, which in turn reduces critical food resources for birds, butterflies, and other wild creatures.  Wild parsnip was imported to the United States for food, after which it escaped cultivation.  Wild parsnip populations have been expanding, especially along roadsides and in degraded areas like old fields.

Contact with the plant’s sap, caused by breaking open the plant’s tissues, can result in phytophotodermatitis, a medical condition where the chemicals of a plant cause the skin to be sensitive to ultraviolet light. Breaking wild parsnip leaves, stems or flowers then exposing the skin to sunlight can result in skin rash, burns, and blisters that are painful and often leave a permanent scar.
Picture
Photo by Leslie J. Mehrhoff, UConn
What does wild parsnip look like?
Wild parsnip is a tall plant, upwards of 5 feet in height possessing large flat flower heads with yellow petals that bloom from June to mid-July. Its leaves are pinnately compound in a basal rosette, and the stem is hollow, fluted, and hairy.  Wild parsnip is similar in appearance to a few native species – cow parsnip (Heracleum lanatum), angelica (Angelica atropurpurea), and prairie golden alexander (Zizia aurea).  However, only golden alexanders has yellow flowers, and is much smaller.
How do I manage wild parsnip?
Prevent invasions by restoring degraded areas like old fields or roadsides back to native plants, which through increased resource competition helps prevent invasive plants from forming monocultures.  If you’re managing existing parsnip populations, develop a management plan that includes surveys so that you can ensure you’re best prioritizing control efforts. 
 
Control of wild parsnip is most successful early in the spring when the plant’s leaves and tap root are small. Smaller plants can be pulled directly from the ground. Once the wild parsnip flowers the flower head and seeds must be removed completely to prevent the distribution of seeds.  Because of the plant’s ability to burn the skin, always wear protective clothing.  Mowing the mature plant is not advised to avoid spreading parsnip seed and to minimize risk of exposure to the plant’s noxious chemicals. 

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Contact US

1450 Cass Road
Traverse City, Michigan 49685
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(231)941 - 0960
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​kgrzesiak@gtcd.org
Pleasant Peninsula Design, Habitat Matters 2017 
  • Home
  • About
    • About ISN & FAQs
    • Our Team
    • Our Partners
    • Steering Committee
    • Employment
    • Enewsletter
    • Donate to ISN
  • Events
  • ID & Report
    • Top 12 Species
    • Early Detection Species
    • Awareness Species
    • Other Invasive Species >
      • Hemlock Woolly Adelgid
      • Aquatic Invasive Species
      • Gypsy Moths
    • ID and Reporting Tools
  • Resources
    • Education
    • Tool Library
    • Planting Guide/Ordinance Templates
    • Requests For Bids
    • Treatment Information
    • Other Information
    • Native Plant Seeds
    • Invasive Species in the News >
      • Nature Change
      • ISN in the News
  • Go Beyond Beauty
    • Find Participants >
      • Nurseries >
        • Bioconcentric Farms
        • Birdsfoot Native Nursery
        • Black Cap Farms
        • Cyman Gardens
        • Garden Goods
        • Greystone Gardens
        • Misty Ridge
        • Northwoods Landscaping & Nursery
        • Pine Hill
      • Landscapers >
        • Cre Woodard
        • Cyman Gardens
        • Designs in Bloom
        • Greener Earth Landscaping
        • Dompierre Design
        • Heritage Landscape Design
        • Inhabitect, LLC
        • Lakeview Habitats
        • Laurel Voran, LLC
        • The Mossy Tree, LLC
        • Northwoods Landscaping & Nursery
        • Old Mission Associates
        • Inner-Coastal
        • Perennial Harvest
        • Pine Hill
        • Silverman & Company
        • Sustainable Landscape Design, LLC
        • TruNorth Landscaping
        • Wildlife & Wetland Solutions
      • Community Participants
    • GBB Achievement Program
    • Register >
      • Registration Form (Garden Professional)
      • Registration Form (Individual or other org)
      • Start-up Materials
    • Ornamental Invasive Species
    • Native Plant Species
    • Participant Signs
    • Japanese Barberry Trade-Up Day
    • GBB Resources
  • Contact