Sideroxylon Spinosum
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''Sideroxylon spinosum'', known as argan (), synonym ''Argania spinosa'', is a species of
flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...
. It is a
tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, e.g., including only woody plants with secondary growth, only ...
endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
to the
calcareous Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime (mineral), lime or being chalky. The term is used in a wide variety of Science, scientific disciplines. In zoology ''Calcare ...
semi-desert
Sous The Sous region (also spelt Sus, Suss, Souss or Sousse) (, ) is a historical, cultural and geographical region of Morocco, which constitutes part of the region administration of Souss-Massa and Guelmim-Oued Noun. The region is known for the en ...
valley of southwestern
Morocco Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to Algeria–Morocc ...
and to the region of
Tindouf Tindouf () is the main town, and a Communes of Algeria, commune in Tindouf Province, Algeria, close to the Algeria–Mauritania border, Mauritanian, Algeria–Western Sahara border, Western Saharan and Algeria–Morocco border, Moroccan borders. Th ...
in southwestern
Algeria Algeria, officially the People's Democratic Republic of Algeria, is a country in the Maghreb region of North Africa. It is bordered to Algeria–Tunisia border, the northeast by Tunisia; to Algeria–Libya border, the east by Libya; to Alger ...
. Argan trees grow to high and live up to approximately 200 years. They are thorny, with gnarled trunks and wide spreading crown. The crown has a
circumference In geometry, the circumference () is the perimeter of a circle or ellipse. The circumference is the arc length of the circle, as if it were opened up and straightened out to a line segment. More generally, the perimeter is the curve length arou ...
of up to and the
branch A branch, also called a ramus in botany, is a stem that grows off from another stem, or when structures like veins in leaves are divided into smaller veins. History and etymology In Old English, there are numerous words for branch, includ ...
es may lean towards the ground.


Name

The former scientific name ''Argania'' was derived from ''argan'', the name of the tree in
Shilha Shilha (from Colloquial Arabic ''Šəlḥa'') is a term used to refer to a number of Berber languages spoken across northern Africa. In international usage, it most commonly refers to Shilha language, Tashelhiyt (Tašlḥiyt), the language of the Sh ...
, the
Berber language The Berber languages, also known as the Amazigh languages or Tamazight, are a branch of the Afroasiatic language family. They comprise a group of closely related but mostly mutually unintelligible languages spoken by Berber communities, who ar ...
which is spoken by the majority of the people living in the areas where the tree is endemic. Shilha Berber has a rich vocabulary for the various parts of the fruit, its stages of ripeness, and its harvesting and processing. The oil is called
argan oil Argan oil is a Vegetable fats and oils, plant oil produced from the kernels of the argan tree (''Argania spinosa'' L.), which is indigenous to Morocco and southwestern Algeria. In Morocco, argan oil is used to dip bread at breakfast or to driz ...
. In medieval Arabic pharmacological sources, the tree is known as ''harjān'', a distortion of the Berber word ''argan''.


Description

The
leaves A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, ...
are small, long, and oval with a rounded apex. The
flower Flowers, also known as blooms and blossoms, are the reproductive structures of flowering plants ( angiosperms). Typically, they are structured in four circular levels, called whorls, around the end of a stalk. These whorls include: calyx, m ...
s are small, with five pale yellow-green petals; flowering in April. The
fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...
is 2–4 cm long and broad, with a thick, bitter peel surrounding a sweet-smelling but unpleasantly flavoured layer of pulpy pericarp. This surrounds the very hard nut, which contains one (occasionally two or three) small, oil-rich seeds. The fruit takes over a year to mature, ripening in June to July of the following year.


Cultivation

The argan tree used to grow throughout North Africa, but today it only grows in southwestern Morocco. Argan is perfectly adapted to the region's harsh environment, with the ability to survive extreme heat (over 50 °C), drought and poor soil. Although numbers are dwindling, argan is the second most abundant tree in Moroccan forests, with over twenty million trees living in the region and playing a vital role in the food chain and environment. The tree's roots grow deep into the ground in search of water, which helps bind soil and prevents erosion. Much of the region has resisted the advance of the Sahara desert due to the argan tree, and it therefore plays an irreplaceable part in the ecological balance of the region. In Morocco, ''arganeraie'' forests now only cover some and are designated as a
UNESCO The United Nations Educational, Scientific and Cultural Organization (UNESCO ) is a List of specialized agencies of the United Nations, specialized agency of the United Nations (UN) with the aim of promoting world peace and International secur ...
biosphere reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, funga, or features of geologic ...
. Their area has shrunk by about half during the last 100 years, due to
charcoal Charcoal is a lightweight black carbon residue produced by strongly heating wood (or other animal and plant materials) in minimal oxygen to remove all water and volatile constituents. In the traditional version of this pyrolysis process, ca ...
making, grazing, increasingly intensive cultivation and the expansion of urban and rural settlements. Livestock numbers have increased substantially, with signs of overgrazing and over browsing in the argan forest. Browsing directly harms the existing, mature argan trees as goats will climb high into the branches of an argan tree to reach its fruit. Overgrazing can cause soil erosion, affects the microclimate of the forest by reducing ground cover and surface humidity and increasing temperature, and impedes the long term regeneration of the forest. The best hope for the conservation of the trees may lie in the recent development of a thriving export market for
argan oil Argan oil is a Vegetable fats and oils, plant oil produced from the kernels of the argan tree (''Argania spinosa'' L.), which is indigenous to Morocco and southwestern Algeria. In Morocco, argan oil is used to dip bread at breakfast or to driz ...
as a high-value product. However, the wealth brought by argan oil export has also created threats to argan trees in the form of increased goat population. Locals use the newfound wealth to buy more goats and the goats stunt the growth of the argan trees by climbing up and eating their leaves and fruit. It is reported that the display of the tree climbing goats is staged or faked in areas popular with tourists, as the goats only very infrequently climb the trees without human intervention. Argan is also cultivated in the
Arabah The Arabah/Araba () or Aravah/Arava () is a loosely defined geographic area in the Negev Desert, south of the Dead Sea basin, which forms part of the border between Israel to the west and Jordan to the east. The old meaning, which was in use ...
and
Negev The Negev ( ; ) or Naqab (), is a desert and semidesert region of southern Israel. The region's largest city and administrative capital is Beersheba (pop. ), in the north. At its southern end is the Gulf of Aqaba and the resort town, resort city ...
regions of
Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...
.


Uses

The argan tree has played a role in the cultures of the Berber people living there for hundreds of years. Argan is a multi-purpose tree and each part of it is usable as a food or economic resource. The fruit can be eaten, oil can be extracted from the nuts and the tree's wood can be used for fuel. The tree has therefore played a vital socio-economic role in local culture, and currently provides a significant source of food and income for around three million people, over two million of whom live in rural areas. In some parts of Morocco, argan takes the place of the
olive The olive, botanical name ''Olea europaea'' ("European olive"), is a species of Subtropics, subtropical evergreen tree in the Family (biology), family Oleaceae. Originating in Anatolia, Asia Minor, it is abundant throughout the Mediterranean ...
as a source of
forage Forage is a plant material (mainly plant leaves and stems) eaten by grazing livestock. Historically, the term ''forage'' has meant only plants eaten by the animals directly as pasture, crop residue, or immature cereal crops, but it is also used m ...
, oil,
timber Lumber is wood that has been processed into uniform and useful sizes (dimensional lumber), including beams and planks or boards. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, window frames). ...
, and fuel in Berber society.


Fruit

Argan fruit falls in July, when they are black and dry. Until this happens, goats are kept out of the argan woodlands by wardens. Rights to collect the fruit are controlled by law and village traditions. The "nuts" are gathered after fruit consumption and spat out by ruminating goats. Seeds being spat out by the goats constitutes one mechanism of
seed dispersal In spermatophyte plants, seed dispersal is the movement, spread or transport of seeds away from the parent plant. Plants have limited mobility and rely upon a variety of dispersal vectors to transport their seeds, including both abiotic vectors, ...
.


Argan oil

Argan oil is produced by several women's co-operatives in the southwestern parts of Morocco. The most labour-intensive part of oil-extraction is removal of the soft pulp (used to feed animals) and the cracking by hand, between two stones, of the hard nut. The seeds are then removed and gently roasted. This roasting accounts for part of the oil's distinctive, nutty flavour. The traditional technique for oil extraction is to grind the roasted seeds to paste, with a little water, in a stone rotary quern. The paste is then squeezed by hand to extract the oil. The extracted paste is still oil-rich and is used as animal feed. Oil produced this way can be stored and used for three to six months, and can be produced as needed from kernels, which can keep for 20 years unopened. Dry-pressing is becoming increasingly important for oil produced for sale, as this method allows for faster extraction, and the oil produced can be used for 12–18 months after extraction. The oil contains 80% unsaturated fatty acids, is rich in essential
fatty acids In chemistry, in particular in biochemistry, a fatty acid is a carboxylic acid with an aliphatic chain, which is either saturated or unsaturated. Most naturally occurring fatty acids have an unbranched chain of an even number of carbon atoms, ...
, and is more resistant to
oxidation Redox ( , , reduction–oxidation or oxidation–reduction) is a type of chemical reaction in which the oxidation states of the reactants change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is ...
than olive oil. Argan oil is used for dipping bread, on
couscous Couscous () is a traditional North African dish a quote: “Couscous or seksu (Image 1) in Berber language or kuskus in Arabic is by origin a Numidian (the Berber population of Numidia) dish…” of small steamed granules of rolled semolina ...
and
salad A salad is a dish consisting of mixed ingredients, frequently vegetables. They are typically served chilled or at room temperature, though some can be served warm. Condiments called '' salad dressings'', which exist in a variety of flavors, a ...
s, and for other similar uses. A dip for bread known as '' amlou'' is made from argan oil,
almond The almond (''Prunus amygdalus'', Synonym (taxonomy)#Botany, syn. ''Prunus dulcis'') is a species of tree from the genus ''Prunus''. Along with the peach, it is classified in the subgenus ''Amygdalus'', distinguished from the other subgenera ...
s, and
peanut The peanut (''Arachis hypogaea''), also known as the groundnut, goober (US), goober pea, pindar (US) or monkey nut (UK), is a legume crop grown mainly for its edible seeds. It is widely grown in the tropics and subtropics by small and large ...
s, sometimes sweetened by
honey Honey is a sweet and viscous substance made by several species of bees, the best-known of which are honey bees. Honey is made and stored to nourish bee colonies. Bees produce honey by gathering and then refining the sugary secretions of pl ...
or sugar. The unroasted oil is traditionally used as a treatment for skin diseases, and has become favoured by European cosmetics manufacturers. Argan oil is sold in Morocco as a luxury item. Sales of the product have grown since being marketed by the cosmetics industry in the US and Europe in the early 21st century. Its price is notable compared to other oils. Argan oil contains: * 46%
Oleic acid Oleic acid is a fatty acid that occurs naturally in various animal and vegetable fats and oils. It is an odorless, colorless oil, although commercial samples may be yellowish due to the presence of impurities. In chemical terms, oleic acid is cl ...
* 32%
Linoleic acid Linoleic acid (LA) is an organic compound with the formula . Both alkene groups () are ''cis''. It is a fatty acid sometimes denoted 18:2 (n−6) or 18:2 ''cis''-9,12. A linoleate is a salt or ester of this acid. Linoleic acid is a polyunsat ...
* 12%
Palmitic acid Palmitic acid (hexadecanoic acid in IUPAC nomenclature) is a fatty acid with a 16-carbon chain. It is the most common saturated fatty acid found in animals, plants and microorganisms.Gunstone, F. D., John L. Harwood, and Albert J. Dijkstra. The ...
* 6%
Stearic acid Stearic acid ( , ) is a saturated fatty acid with an 18-carbon chain. The IUPAC name is octadecanoic acid. It is a soft waxy solid with the formula . The triglyceride derived from three molecules of stearic acid is called stearin. Stearic acid ...


Animal feed

Argan trees are a major source of forage for sheep, goats, camels and cattle. The fruit and leaves are readily consumed by livestock. The press cake resulting from oil extraction can also be sun dried and fed to ruminants. Bees can nest in argan trees, making them sites for wild honey harvesting.


International recognition


Geographical indication

The unique geographical properties of the region led to an application with the European Union to protect Argane (argan in French) by the Moroccan government. The application for Argane to become a Protected
Geographical Indication A geographical indication (GI) is a name or sign used on products which corresponds to a specific geographical location or origin (e.g., a town or region). The use of a geographical indication, as an indication of the product's source, is inten ...
was made in October 2011 with the European Commission.


Intangible Cultural Heritage

In 2014, the United Nations Educational, Scientific and Cultural Organization (
UNESCO The United Nations Educational, Scientific and Cultural Organization (UNESCO ) is a List of specialized agencies of the United Nations, specialized agency of the United Nations (UN) with the aim of promoting world peace and International secur ...
), inscribed "Argan, practices and know-how concerning the argan tree" on the Representative List of the
Intangible Cultural Heritage An intangible cultural heritage (ICH) is a practice, representation, expression, knowledge, or skill considered by UNESCO to be part of a place's cultural heritage. Buildings, historic places, monuments, and artifacts are cultural property. In ...
of Humanity, upon Moroccan request, for the protection and safeguarding of traditions, knowledge, practices, and crafts related to the argan tree.


United Nations International Day

On 3 March 2021, the United Nations General Assembly adopted a resolution to proclaim 10 May the International Day of Argania, an observance to be celebrated annually. Amongst the motivations for this proclamation were the importance of Argania to sustainable development in areas where it is endemic. The UN resolution was submitted by Morocco, and was co-sponsored by 113 member states of the United Nations before being adopted by consensus.


References

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External links

* * {{Authority control spinosum Edible nuts and seeds Crops originating from Africa Forages Drought-tolerant trees Trees of Mediterranean climate Trees of Morocco Trees of Algeria Masterpieces of the Oral and Intangible Heritage of Humanity Plants described in 1753 Taxa named by Carl Linnaeus