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   Onopordum acanthium (herb)
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    Details of this species in Wyoming
    Status: Alien
    Invasiveness: Invasive
    Occurrence: Reported
    Source: USDA, 2002
    Arrival Date:
    Introduction:
    Species Notes for this Location:
    Management Notes for this Location:
    Location Notes:
    Impacts:
    Agricultural: Dense stands of the large, spiny plants constitute a barrier to livestock movement, almost totally excluding animals from grazing and access to water (Hooper et al 1970, Sindel 1991, in WSWB, 2003).
    Last Modified: 30/12/2003 1:35:34 p.m.
ISSG Landcare Research NBII IUCN University of Auckland The Global Invasive Species Database is managed by the Invasive Species Specialist Group (ISSG) of the IUCN Species Survival Commission. It was developed as part of the global initiative on invasive species led by the Global Invasive Species Programme (GISP) and is supported through partnerships with the National Biological Information Infrastructure, Manaaki Whenua-Landcare Research and the University of Auckland. Conditions of use.