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Wisflora - Vascular Plant Species

University of  Wisconsin - Madison 

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Family: Asteraceae
  Genus: Iva

    Iva annua L.
        annual marsh-elder, rough marsh-elder
    Iva annua L. var. annua +

        annual marsh-elder, rough marsh-elder
             Iva ciliata Willd.
    Iva axillaris Pursh+

        poverty-weed
             Iva axillaris Pursh subsp. robustior
             Iva axillaris Pursh var. robustior Hook.
    Iva xanthifolia Nutt.*+

        bur-weed marsh-elder, giant sump-weed
             Cyclachaena xanthifolia (Nutt.) Fresen.

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