👉 Pseudolasius is a genus of flowering plants in the family Rosaceae, commonly known as the Japanese knotweed or Japanese knotweed plant. This genus contains several species that are native to Japan and its surrounding areas, including the island of Hokkaido. They grow up to 15 feet tall with large, clumped leaves. The flowers are often purple in color and may be found on branches, in pots, or in soil. Pseudolasius can be distinguished from
