Tetraena alba | |
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Growing in Tunisia | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Zygophyllales |
Family: | Zygophyllaceae |
Genus: | Tetraena |
Species: | T. alba |
Binomial name | |
Tetraena alba (L.f.) Beier & Thulin [1] | |
Synonyms [1] | |
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Tetraena alba (synonym Zygophyllum album) is a species of plant in the family Zygophyllaceae which is found in arid regions of Africa and the Arabian Peninsula. It is a salt tolerant plant and dominates many of the plant communities in which it grows.
Tetraena alba is a low, much-branched shrub. The leaves have paired obovoid, fleshy leaflets which are whitish with mealy pubescence. The small flowers are solitary and grow in the axils of the leaves; they have white, clawed petals. The fruit is a five-lobed, pear-shaped capsule containing elliptical seeds with wart-like projections. [2]
This species is found in Spain, Crete, Northern and Northeast Africa, Mauritania, Western Asia (including southern Cyprus, the Eastern Aegean Islands and the Sinai Peninsula) and the Arabian Peninsula. [2] [1]
Tetraena alba is a salt-tolerant plant; it does not have glands to secrete the excess salt it takes up, instead it concentrates the salt in its leaves and then sheds them, also shedding its petioles when necessary. It is found in a number of different habitats; one of these is "phytogenic hillocks", hummocky landforms typical in areas with blown sands; another is in saline depressions, sometimes as pure stands, and other times as the dominant plant in its community. Other plants in the salt-tolerant communities in which it lives include Halocnemum strobilaceum , Nitraria retusa and Limonium axillare . [3] At the Moghra Oasis in the Qattara Depression there is a brackish lake and a Phragmites swamp, and T. alba grows at the perimeter, where the desert plains start. In the innermost part of this zone it forms hummocks and grows with Tamarix nilotica , Alhagi maurorum and Nitraria retusa. In the outermost part the plants are scant, do not form mounds and are progressively smaller. [4]
The wildlife of Egypt is composed of the flora and fauna of this country in northeastern Africa and southwestern Asia, and is substantial and varied. Apart from the fertile Nile Valley, which bisects the country from south to north, the majority of Egypt's landscape is desert, with a few scattered oases. It has long coastlines on the Mediterranean Sea, the Gulf of Suez, the Gulf of Aqaba and the Red Sea. Each geographic region has a diversity of plants and animals each adapted to its own particular habitat.
Nitraria retusa is a salt-tolerant and drought-resistant shrub in the family Nitrariaceae. It can grow to heights of 2.5 metres, although it seldom exceeds more than 1 m in height. It produces small white/green coloured flowers and small edible red fruit. The plant is native to desert areas of northern Africa, where it grows in primary succession on barren sand dunes, and in areas with high salinities such as salt marshes.
Cornulaca monacantha is a species of flowering plant in the genus Cornulaca, that is now included in the family Amaranthaceae,. It is a desert plant found in the Middle East and the Sahara, and the southern end of its range is considered to delineate the edge of the desert. In Arabic it is known as had and djouri, and the Tuareg people call it tahara. It was first described in 1813 by the French botanist Alire Raffeneau Delile.
Suaeda fruticosa is a species of flowering plant in the family Amaranthaceae. It is a small shrub, with very variable appearance over its wide range. It is a halophyte, and occurs in arid and semi-arid saltflats, salt marshes and similar habitats.
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Tetraena qatarensis is a salt-tolerant dwarf shrub that grows in the Arabian Peninsula. It has small compact leaves that store water. The leaflets grow in pairs and the flowers have four or five petals.
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Salsola imbricata is a small species of shrub in the family Amaranthaceae. It grows in deserts and arid regions of north Africa, the Arabian Peninsula and southwestern Asia.
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Salsola vermiculata, commonly known as Mediterranean saltwort, is a perennial plant in the family Amaranthaceae. It is native to arid and semi-arid regions of the Middle East, North Africa and southern Europe where it is used as a fodder plant for livestock.
Tamarix nilotica, the Nile tamarisk is a species of shrub or small tree in the tamarisk family. It is found in arid parts of North Africa and the Middle East, particularly areas with high salinity. It forms part of the dune stabilisation process.
Juncus rigidus is a species of rush known by the common name sea rush. It is native to much of Africa and parts of western Asia. It is found inland and by the sea in sandy saline habitats.
The Moghra Oasis is an uninhabited oasis in the northeastern part of the Qattara Depression in the Western Desert of Egypt. It has a 4 km2 (1.5 sq mi) lake containing brackish water, salt marshes and a swamp with reeds.
Aeluropus lagopoides, sometimes called mangrove grass or rabbit-foot aeluropus, is a species of Eurasian and African plant in the grass family, found primarily in salty soils and waste places.
Tetraena fontanesii, synonym Zygophyllum fontanesii, is a species of plant of the family Zygophyllaceae. It is found in Macaronesia and northwest Africa.
Tetraena is a genus of flowering plants in the family Zygophyllaceae.
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