''Vachellia tortilis'', widely known as ''Acacia tortilis'' but now attributed to the genus '' Vachellia'', is the umbrella thorn acacia, also known as ''umbrella thorn'' and Israeli babool, a medium to large canopied tree native to most of

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

, primarily to the

savanna A savanna or savannah is a mixed woodland- grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...

and Sahel of

(especially the Somali peninsula and Sudan), but also occurring in the

Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabia (including the Arabian Peninsula and Bahrain), Asia Minor (Asian part of Turkey except Hatay Province), East Thrace (Europ ...

Distribution and growing conditions

''Vachellia tortilis'' is widespread in Africa, being found in countries like Tunisa,

Morocco Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria t ...

Uganda }), is a landlocked country in East Africa. The country is bordered to the east by Kenya, to the north by South Sudan, to the west by the Democratic Republic of the Congo, to the south-west by Rwanda, and to the south by Tanzania. The sou ...

Angola , national_anthem = " Angola Avante"() , image_map = , map_caption = , capital = Luanda , religion = , religion_year = 2020 , religion_ref = , coordina ...

Zimbabwe Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and ...

Djibouti Djibouti, ar, جيبوتي ', french: link=no, Djibouti, so, Jabuuti officially the Republic of Djibouti, is a country in the Horn of Africa, bordered by Somalia to the south, Ethiopia to the southwest, Eritrea in the north, and the Red ...

, and

Botswana Botswana (, ), officially the Republic of Botswana ( tn, Lefatshe la Botswana, label= Setswana, ), is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory being the Kalaha ...

. It tends to grow in areas where temperatures vary from and rainfall is anywhere from about per year.

Characteristics

In extremely arid conditions, it may occur as a small, wiry bush. It grows up to in height. The tree carries leaves that grow to approx. in length with between 4 and 10 pair of

pinnae The auricle or auricula is the visible part of the ear that is outside the head. It is also called the pinna (Latin for "wing" or " fin", plural pinnae), a term that is used more in zoology. Structure The diagram shows the shape and location ...

each with up to 15 pairs of leaflets. Flowers are small and white, highly

aroma An odor (American English) or odour ( Commonwealth English; see spelling differences) is caused by one or more volatilized chemical compounds that are generally found in low concentrations that humans and animals can perceive via their se ...

tic, and occur in tight clusters. Seeds are produced in pods which are flat and coiled into a springlike structure. The plant is known to tolerate high

alkalinity Alkalinity (from ar, القلوي, al-qaly, lit=ashes of the saltwort) is the capacity of water to resist acidification. It should not be confused with basicity, which is an absolute measurement on the pH scale. Alkalinity is the strength ...

drought A drought is defined as drier than normal conditions.Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D. Jiang, A. Khan, W. Pokam Mba, D. Rosenfeld, J. Tierney, an ...

, high temperatures, sandy and stony soils, strongly sloped rooting surfaces and sandblasting. Also, plants older than two years have been observed to be somewhat frost resistant.

Importance

Timber from the tree is used for furniture, wagon wheels, fence posts, cages, and pens. Vachellia wood was also used exclusively by the

Israelites The Israelites (; , , ) were a group of Semitic-speaking tribes in the ancient Near East who, during the Iron Age, inhabited a part of Canaan. The earliest recorded evidence of a people by the name of Israel appears in the Merneptah Stele o ...

in the Old Testament in the building of the

tabernacle According to the Hebrew Bible, the tabernacle ( he, מִשְׁכַּן, mīškān, residence, dwelling place), also known as the Tent of the Congregation ( he, link=no, אֹהֶל מוֹעֵד, ’ōhel mō‘ēḏ, also Tent of Meeting, etc.), ...

and the tabernacle furniture, including the Ark of the Covenant. The pods and foliage, which grow prolifically on the tree, are used as fodder for desert grazing animals. The bark is often used as a string medium in Tanganyika, and is a source for

tannin Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' (from Anglo-Norman ''tanner'' ...

. Gum from the tree is edible and can be used as

Gum Arabic Gum arabic, also known as gum sudani, acacia gum, Arabic gum, gum acacia, acacia, Senegal gum, Indian gum, and by other names, is a natural gum originally consisting of the hardened sap of two species of the ''Acacia'' tree, '' Senegalia se ...

. Parts of the tree including roots, shoots, and pods are also often used by natives for a vast number of purposes including decorations,

weapon A weapon, arm or armament is any implement or device that can be used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, ...

tool A tool is an object that can extend an individual's ability to modify features of the surrounding environment or help them accomplish a particular task. Although many animals use simple tools, only human beings, whose use of stone tools dates ba ...

s, and

medicine Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pr ...

s. The Umbrella thorn is also an important species for rehabilitation of degraded arid land; it tolerates drought, wind, salinity and a wide range of soil types, and has the additional benefit of fixing nitrogen, an essential plant nutrient, in the soil via its interaction with symbiotic root bacteria. File:Acacia tortilis subsp heteracantha, loof en peule, Wonderboom NR, a.jpg, The pods are curled. File:Acacia tortilis, haak- en steekdorings, Springbokvlakte.jpg, It has a combination of paired straight and paired hooked thorns, from which the Afrikaans name derives, meaning "hook and prick". File:Acacia tortilis subsp heteracantha, blomtyd, Lekkerbreek-plaas, a.jpg, The southern subspecies ''heteracantha'', here seen in flower, is smaller and often without a spreading crown.

References

External links

* *
''Vachellia tortilis'' (as ''Acacia tortilis'') (www.fao.org)
* ttp://www.frienvis.nic.in/Acaciatortilis.htm ''Vachellia tortilis'' (as ''Acacia tortilis'') (www.frienvis.nic.in)
''Vachellia tortilis'' (as ''Acacia tortilis'')
Israel wildflowers and native plants {{Taxonbar, from1=Q14933877, from2=Q1337058, from3=Q14933879 tortilis Flora of Western Asia Flora of the Arabian Peninsula Trees of Africa Plants used in traditional African medicine