Photo of coontail aquatic plant with penny for scale

    Coontail (Hornwort)

    Ceratophyllum demersum
    Photo of several big bluestem seed heads against a blue sky.

    Grasses

    All true grasses (species in the grass family).
    Photo of pale Indian plantain flower clusters.

    Pale Indian Plantain

    Arnoglossum atriplicifolium (also Cacalia atriplicifolia)
    Photo of white avens flower and upper stem leaves.