is parent to the modern daylily. The first recorded planting of the tawny daylily in the United States was in 1793. It became the ultimate pass-along plant and by the early 20Th century was so commonly found in wild places it was often assumed to be native. Surprisingly the plant is sterile and almost never sets seed pods so it's widespread distribution is the handiwork of gardeners. It produces a foot long stolon ( a modified stem) so plants scamper about the garden as they seek new places to run. Thus ditch lily is an aggressive competitor.