Photo of horseweed flowers

    Horseweed (Canada Fleabane, Hog Weed)

    Conyza canadensis (formerly Erigeron canadensis)
    Photo of white crownbeard plant with flowers

    White Crownbeard

    Verbesina virginica
    Photo of white heath aster flowers

    White Heath Aster

    Symphyotrichum pilosum (formerly Aster pilosus)
    Photo of white snakeroot leaves and flowers

    White Snakeroot

    Ageratina altissima (formerly Eupatorium rugosum)
    Poisonous Icon

    Poisonous

    Photo of yarrow or common milfoil flower cluster

    Yarrow (Common Milfoil)

    Achillea millefolium