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Vachellia tortilis

life science Maturity 5-7 Next article →

The umbrella thorn acacia is a resilient tree with many names. Scientists call it Vachellia tortilis. It belongs to the Fabaceae subfamily, known as Mimosoideae. Many people call it the umbrella thorn or the Israeli babool. This tree is a vital part of many dry ecosystems. It helps keep the land healthy and provides resources for many living things.

This tree grows in very specific environments. It is native to most of Africa, especially the Sahel and the savanna. You can find it in the Somali peninsula and Sudan. It also grows in the Middle East. Many countries host these trees, such as Tunisia, Morocco, Uganda, Angola, Zimbabwe, Djibouti, and Botswana. The tree survives in places with high temperatures and varying rainfall. It can grow in sandy or stony soils and on strongly sloped surfaces.

The physical appearance of the tree changes based on its home. In extremely arid conditions, it may grow as a small, wiry bush. In better conditions, it grows into a medium to large canopied tree. The leaves are made of several pinnae, which are leaf-like structures. Each tree has between 4 and 10 pairs of pinnae. Each pinna contains up to 15 pairs of tiny leaflets. One of its most distinct features is its thorns. The tree grows pairs of thorns that look different. One thorn is long, straight, and pale. The second thorn is short, dark, and curved.

Beyond its thorns, the tree has unique flowers and seeds. The flowers are small and white. They grow in tight clusters and are highly aromatic, meaning they have a strong scent. After flowering, the tree produces seeds in special pods. These pods are flat and coiled into a springlike structure.

One of the most important roles of Vachellia tortilis is soil rehabilitation. It can help fix degraded, arid land. The tree is able to tolerate drought, wind, and salinity. It also survives sandblasting from the wind. Most importantly, the tree fixes nitrogen in the soil. Nitrogen is an essential plant nutrient. The tree does this through an interaction with symbiotic root bacteria. These bacteria live in the roots and help turn nitrogen into a form plants can use.

Humans have used this tree for many different purposes for a long time. The pods and foliage grow prolifically. These parts are used as fodder for animals grazing in the desert. In Tanzania, the bark is used as a string medium. The bark is also a source of tannin. The tree produces an edible gum called gum arabic. Native people also use the roots, shoots, and pods for medicines, tools, weapons, and decorations. The strong timber is used for wagon wheels, fence posts, cages, pens, and furniture.

The tree also holds deep religious and historical significance. In the Bible, the Israelites used this wood exclusively. They used it to build the tabernacle and the Ark of the Covenant. The tree is also mentioned in the Quran. It was the site of the historic pledge of allegiance of Hudaybiya. According to the Quran, God sent tranquillity to the believers when they swore fealty under the tree. An old Arabian name for this tree was Samurathe.

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