Species such as kudzu, Japanese honeysuckle and multiflora rose have damaged natural ecosystems. Common shrubs in the understory include&colon; oak saplings, blackberry, blueberry, rose, and Japanese honeysuckle. Invasive vines are kudzu and Japanese honeysuckle. The cultivar is also known as Hall's Japanese honeysuckle. Japanese honeysuckle is used in traditional Chinese medicine. Some edible flowers include nasturtium, chrysanthemum, carnation, cattail, Japanese honeysuckle, chicory, cornflower, canna, and sunflower. Invasive plant species such as Japanese honeysuckle ("Lonicera japonica") now occur in the area. Also, "T. difformis" may be confused with trumpet honeysuckle, alien japanese honeysuckle, or carolina jessamine. Japanese honeysuckle is extremely common, its fragrance an early summer delight. The Japanese honeysuckle has been recorded in the riparian zones of the park. Japanese honeysuckle and Japanese knotweed are two other invasive vines native to Asia. Popular honeysuckles for cottage gardens include Japanese honeysuckle and "Lonicera tragophylla". Japanese honeysuckle flowers are edible to humans and appreciated for their sweet-tasting nectar.