Photo of common cinquefoil plants with flowers

    Common Cinquefoil

    Potentilla simplex
    Photo of common milkweed flower cluster

    Common Milkweed

    Asclepias syriaca
    Photo of a giant ragweed plant.

    Giant Ragweed

    Ambrosia trifida
    Photo of whorled milkweed flowers.

    Milkweeds

    Subfamily Asclepiadoideae