الفهرس 
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Abstract
Sinai Peninsula is of special geographic position as abridge between Asia and Africa contents. This place gives the peninsula a mixed feature of the two contents. The studied area was comprises by six regions: Gebel Musa, Wadi El Sheikh, wadi Feiran , Wadi Watir, Wadi Swudr, and Gulf of Suez Coast. The results proved that the mountainous habitat is being the more rich and diverse habitat than the wadis due to the presence of the soil pocket between fissured and smooth faced rocksh besides the large amount of the rainfall. By studying the major threats of plant vegetation we found that overgrazing , overcollection and increase of the ecotrosium are between the most threats of the vegetation.