Photo of Chinese yam showing leaves and bulbils

    Chinese Yam

    Dioscorea oppositifolia (sometimes called D. batatas)
    invasive icon

    Invasive

    Photo of a giant ragweed plant.

    Giant Ragweed

    Ambrosia trifida
    Photo of whorled milkweed flowers.

    Milkweeds

    Subfamily Asclepiadoideae