👉 Neocouma is a type of flowering plant that grows in the same family as the Japanese knotweed, but differs in size and shape. It is characterized by its large, flat leaves that can grow up to 10 inches long and wide. The flowers are arranged in a cluster of five or more, which is often described as "panicles." These plants thrive in moist soil and have been used for centuries in Japanese gardens, where they serve as ornamental features.