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Alligatorweed (Alternanthera philoxeroides)

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Alligatorweed

(Alternanthera philoxeroides)

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Pennsylvania

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    Be on the Lookout for these Invaders!

    If you find any of these emerging invasive species in Pennsylvania, 

    report your observations to iMapInvasives so your findings may be directed to the appropriate officials.

    Plants

    View Species

    Insects

    View Species

    Invertebrates

    View Species

    Fish

    View Species

    Be an Early Detector

    ​

    In 2017, the Pennsylvania Natural Heritage Program (PNHP) received funding from the Wild Resources Conservation Program to determine invasive plants likely to arrive in Pennsylvania over the next ten years, species considered "emerging threats" to the Commonwealth.

     

    The project identified 12 species, each of which are highlighted in a brochure created by the PNHP.  Citizen scientists and natural resource professionals are encouraged to be on the lookout for these species and report their findings to iMapInvasives.

    ​

    Note: Some text in the brochure is upside-down. This is necessary to ensure a proper format for printing. Brochure size is 11" x 17".

    WRCP brochure.PNG
    Project Report
    Brochure

    Marsh Thistle (Cirsium palustre)

    Photo credit: Luis Mata, CC-BY-NC-SA 2.0

    The Pennsylvania iMapInvasives Program is a partnership of the Western Pennsylvania Conservancy, the Pennsylvania Natural Heritage Program, and NatureServe.

    Funding for Pennsylvania iMapInvasives is provided by the Great Lakes Restoration Initiative.

    NatureServe logo, iMapInvasives partner
    Pennsylvania Natural Heritage Program, iMapInvasives partner
    Great Lakes Restoration Initiative logo, iMapInvasives funding source