African Potato
Parts Usually Used
The tuberous rootstock (corm) is the main part used medicinally. The corm is covered with bristly hairs and is bright yellow when freshly cut.
Description of Plant(s) and Culture
A tuberous perennial with strap-like leaves up to 400mm long arranged in 3 ranks. The leaves are broad, stiff and arching with prominent ribs. Flowers are bright yellow and star-shaped with 6 tepals, carried on 5-6 slender erect stems. The flowers are short-lived and close at midday. The large dark brown tuber contains bright yellow flesh when cut and has a bitter taste.
Where Found
Native to Southern Africa, growing primarily in South Africa, Lesotho, Mozambique and Zimbabwe, extending into East Africa. Found in open grasslands and woodlands in the eastern summer rainfall regions.
Medicinal Properties
Studies have shown immunomodulatory, antioxidant, antinociceptive, hypoglycemic, anti-inflammatory, anticonvulsant, antibacterial, uterolytic, antimotility, spasmolytic and anticholinergic properties. The plant contains hypoxoside which is converted to rooperol, a potent antioxidant, in the gut. The corm contains sterols, sterol glycosides, stanols, terpenoids, saponins, cardiac glycosides, tannins and reducing sugars that contribute to its therapeutic effects.
Uses
Traditional practitioners utilized the plant topically for burns and wounds. Herbalists also historically employed it in the management of prostate complaints and rheumatoid arthritis.
How Sold
Available as capsules, tonics, creams, tinctures, powders, soaps, oils and other formulations.
Warning
Common side effects include nausea and vomiting which typically subside over time. Can interfere with cytochrome P450 metabolism and may interact with antiretroviral medications. Safety not established in children, pregnant or nursing women. Raw products may be toxic and should be used with caution.