Polygonaceae, commonly known as the buckwheat family, is a diverse group of flowering plants that includes around 1,200 species. This family is characterized by its unique leaf structure, often with a sheathing base, and small, clustered flowers. Many members of Polygonaceae are found in temperate regions and can thrive in various habitats, from wetlands to dry areas. Some well-known plants in this family include buckwheat, which is cultivated for its grain, and rhubarb, valued for its edible stalks. The family also includes ornamental plants like Japanese knotweed, which is known for its rapid growth and invasive nature. Overall, Polygonaceae plays a significant role in both agriculture and horticulture.