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2Al- Blaqa Applied University, Al-Salt, Jordan
This study is concentrating on the present status of the plant biodiversity of the study area, Zarka (Jordan) based on plant collections from the study area. The wild flowering, vascular plants in the surrounding area have been surveyed and identified. The results showed a low botanical diversity of the study area in terms of the number and diversity of plant species recorded. A total number of 101 species belonging to 57 genera and 15 families is recorded. Wild plants are also reported like: Atriplex semibaccata, Conyza bonariensis, Peganum harmala, Lamarckia aurea, Hammada eigii, and others. The analysis of SEM shows many different elements deposited on the leaves of all plants that have been sampled and examined in the study area such as: C, Fe, Mg, Al, Si, Cl, K, Ca, Ti, S, Na and others. Dust particles deposited on leaves surfaces contain major concentrations of CaO, SiO2, K2O, Al2O3 and MgO. However the majority of plant species recorded in the study area is facing the danger of loss and degradation, as the area is severely exposed to the dust from the established refinery plant and others environmental and man effects.