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E-book Medicinal Effects of Agathosma (Buchu) Extracts
South Africa is rich in floral biodiversity as well as cultural diversity. The Cape region1 of South Africa has veldt types, with one of the richest compositions of indigenous aromatic plant species in the country. One such aromatic plant is the genus Agathosma. There are about 150 different species within this genus, which derives from a greater family called Rutaceae, which also includes citrus plants.1 These rutacious shrubs are part of the Cape Floral Kingdom (fynbos) vegetation found in the Western Cape Province of South Africa and are particularly abundant in the mountainous areas of the Cape The term ‘buchu’ is primarily derived from the Khoisan (indigenous people of the western region of South Africa) and was used for any fragrant plant that could be dried and powdered.2,3Therefore, it included a wide variety of aromatic plant species, not singling out a specific genus.2 The Khoisan tribes relied on these plant materials for centuries to maintain and/or promote good health and longevity. For the Khoisan, dried buchu was the mainstay of the perfume repertoire of a woman and was also seen as an agent of physical and mental transformation, and was extensively used in medicine, perfume and certain rituals.3 In that era, herbal remedies formed the backbone of health care and were the main source of medication.3 Today, the term ‘buchu’ refers mostly to Agathosma betulina (round-leaf buchu, also known as bergboegoe or short buchu) and Agathosma crenulata(oval-leaf buchu, also known as anysboegoe or long-leaf buchu) which are the most common species.1Agathosma betulina is a small, multi-stemmed plant, which grows to a height of about 1 m in the mountains of the Western Cape Province (from Clanwilliam in the north to Tulbagh in the south). Agathosma crenulata is a single-stemmed plant and grows to a height of approximately 2.5 m, which grows between Gouda (north) and Stanford (south) and as far as the Outeniqua Mountains (east). The preferred soils of these plants are mostly nutrient-poor, sandy soils, with low pH levels varying between pH 3.7 and pH 5.3. Buchu plants grow naturally on steep slopes, with altitudes ranging between 737 m and 2028 m above sea level.
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