A "cultivar" is a specific variety of a plant that has been cultivated for particular characteristics, such as color, size, or disease resistance. Cultivars are often developed through selective breeding and are usually propagated through methods like cuttings or grafting to maintain their unique traits. They are commonly found in gardening, agriculture, and horticulture. Cultivars are designated with a name that is often italicized and enclosed in single quotes, such as *Rosa 'Knock Out'*. This naming convention helps distinguish them from wild species and other varieties. Cultivars play a significant role in enhancing biodiversity and improving crop yields in farming practices.