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Yam an expansive kingdom
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[QUOTE]Originally posted by alTakruri: [QB] The [i]im3[/i] tree, spelled with the first three glyphs in Yam, is thought to be either Maerua crassifolia or zizyphus. Both are common central/southern Sahara plants. [QUOTE] [IMG]http://www.thewoodexplorer.com/countrydata/Resources/fc206.gif[/IMG] [IMG]http://www.thewoodexplorer.com/countrydata/Resources/item2ag.gif[/IMG] [URL=http://www.]Other wooded land[/URL][b] Shrubs[/b] Scrub types occur in the "semi-desert zone" (the northern half of Kordofan and Blue Nile provinces, the whole of the Khartoum province and about three-quarters of Kassala province and some parts of Darfur adjoining Kordofan). The rainfall is 75 to 300 mm, confined to July and August, and comes as a few local storms or scattered showers with a variable and unreliable pattern. The vegetation is a variable mixture of grasses and herbs, either without any shrubs or more frequently with widely scattered ones about 2 meters high. The grass is not dense enough to allow fires to burn through it annually. Only three sub-divisions have been classified as bearing woody vegetation: [list] [*]Acacia tortilis-[i]Maerua crassifolia[/i] desert scrub is seldom homogeneous because of advanced geological erosion. The characteristic tree is Acacia tortilis, which usually has a flat-topped crown and several stems. In the drier parts it is confined to drainage lines, but as the rainfall increases it spreads out from these and in places occupies quite large areas. Some fairly thick even stands occur east of Khartoum. A common associate is [i]Maerua crassifolia[/i] while Acacia raddiana, Salvadora persica and Leptadenia pyrotechnica are found in sandy wadis and Capparis decidua, [i]Ziziphus[/i] spina-christi and Balanites aegyptiaca in clay drainages. Acacia nubica and Calotropis procera indicate heavy overgrazing. [*]Acacia mellifera-Commiphora desert scrub replaces the previous vegetation type in northern Kordofan and northern Darfur. Ground cover varies greatly. Generally, the bushes occur as only a scattering but they become thicker and more uniform on hollows between "gozes". Particularly near rock outcrops, but also away from these, Commiphora africana and other species of Commiphora are the most abundant bushes, growing in association with Acacia mellifera. Others in varying quantity are [i]Maerua crassifolia[/i], Boscia senegalensis, Acacia raddiana and Lannea humilis. Leguminous shrubs are often present. Generally, but not always, there are more annual grasses than perennials. Blepharis sp. is widely seen in places where the grazing pressure is not too heavy. [/list] [/QUOTE] [/QB][/QUOTE]
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