Agathosma is a genus of flowering plants in the family Rutaceae, commonly known as the buchu plants. These shrubs are native to southern Africa, particularly in regions like South Africa and Lesotho. They are characterized by their aromatic leaves and small, star-shaped flowers, which can be white, pink, or purple. The leaves are often used for their essential oils, which have various applications in traditional medicine and perfumery. The most well-known species within this genus is Agathosma betulina, often referred to as "buchu." Buchu leaves are traditionally used for their potential health benefits, including anti-inflammatory and diuretic properties. The plants thrive in well-drained soils and are typically found in fynbos ecosystems, which are rich in biodiversity.