Landraces refer to traditional, locally-adapted crop varieties that have evolved naturally over time, without any human intervention. These varieties typically possess unique genetic traits that make them particularly suited to specific environmental conditions. Synonyms for landraces include heirloom varieties, heritage varieties, primitive cultivars, and folk cultivars. These terms are often used to describe crop varieties that have been preserved through generations of farming and seed saving, and which have remained relatively unchanged over time. Landraces and their synonyms are increasingly being recognized as important genetic resources for crop improvement and sustainable agriculture, and efforts are underway to conserve and promote their use in farming systems around the world.