Shiny-leaf buckthorn

Description

Rhamnus prinoides, the shiny-leaf buckthorn, is an African shrub or small tree in the family Rhamnaceae. Commonly referred to as "gesho" it was first scientifically described by French botanist Charles Louis L'Héritier de Brutelle in 1789. Rhamnus prinoides occur from Eritrea to South Africa at medium to high altitudes. They grow near streams or along forest margins. The small edible fruits are shiny red and berry-like. The Rhamnus prinoides plant has many uses amongst the inhabitants of Africa. All parts of the plant are harvested and used for nutrition, medicine or religious purposes. Gesho, as it is known in Eritrea and Ethiopia, has a considerable value in these countries. It is one of the most precious crops used both locally for domestic use, and fabricated products industrially. In Eritrea and Ethiopia, where the plant is known as gešo or gesho, it is used in a manner similar to hops. The stems are boiled and the extract mixed with honey to ferment a mead called myes in Tigrinya and tej in Amharic. It is also used in the brewing of tella (siwa in Tigrinya), an Eritrean and Ethiopian beer. This local drink is made from gesho as a major ingredient. Gesho leaves are sundried and pounded with mortar and pestle into flour. Barley malt is prepared and sundried and ground. These two ingredients are mixed, in a proportion that varies from maker to maker, and fermented 3 to 5 days on average. Finger millet (or sorghum and maize flour regionally) are baked, and finally mixed with the fermented solution. After 1–2 days of fermentation, the tella can be filtered and consumed in a drink locally called guesh (tsiray in Tigrinya). Rhamnus is a genus of about 110 accepted species of shrubs or small trees, commonly known as buckthorns, in the family Rhamnaceae. Its species range from 1 to 10 m (3 to 33 ft) tall (rarely to 15 m, 50 ft) and are native mainly in east Asia and North America, but found throughout the temperate and subtropical Northern Hemisphere, and also more locally in the subtropical Southern Hemisphere in parts of Africa and South America. One species, the common buckthorn (Rhamnus cathartica), is able to flourish as an invasive plant in parts of Canada and the U.S., where it has become naturalized.