Photo of buffalo bur flower and leaves.

    Buffalo Bur (Kansas Thistle)

    Solanum rostratum
    Poisonous Icon

    Poisonous

    Photo of common horse gentian stalk showing opposite, perfoliate leaves.

    Common Horse Gentian

    Triosteum perfoliatum
    Photo of copper iris plants with flowers

    Copper Iris

    Iris fulva
    Photo of mullein basal leaves

    Mullein

    Verbascum thapsus
    Photo of wood spurge flowers.

    Wood Spurge

    Euphorbia commutata