桦木科, or the Betulaceae family, is a group of flowering plants that includes trees and shrubs. This family is primarily found in the northern hemisphere and is known for its economic and ecological importance. Common members include birch and alder, which are often used for timber and ornamental purposes. The leaves of 桦木科 plants are typically simple and alternate, and they produce catkins as their flowers. These plants play a vital role in their ecosystems, providing habitat and food for various wildlife. Additionally, some species are valued for their medicinal properties and are used in traditional medicine.