Which of the following is NOT considered a woody plant?

Japanese knotweed is classified as an herbaceous perennial, meaning it has a non-woody stem that dies back in the fall and grows anew in the spring. This characteristic distinguishes it from woody plants, which have persistent woody stems that remain throughout the year.

In contrast, Asiatic bush honeysuckle, Oriental bittersweet, and white oak are all considered woody plants. They possess the defining features of woody stems and branches, contributing to their growth form and habitat characteristics. Understanding this classification helps in managing plant populations effectively in various ecosystems, particularly in right-of-way areas where control of invasive species is crucial.