Illustration of American holly leaves, flowers, fruit.

    American Holly

    Ilex opaca
    Illustration of common buckthorn leaves and fruits.

    Common Buckthorn

    Rhamnus cathartica
    Poisonous Icon

    Poisonous

    invasive icon

    Invasive

    Photo of hawthorn trees blooming on lawn of Missouri state capitol

    Hawthorns

    Various species in the genus Crataegus
    Illustration of multiflora rose, leaves, flowers, fruits.

    Multiflora Rose

    Rosa multiflora
    invasive icon

    Invasive