El-Jabal Al Akhdar area possesses unique physiographic and climatic conditions that provides an excellent ecological niche and contributed to the restriction of many plant species. Among the most widely used plants are Arbutus pavarii [family Ericaceae], Pistacia lentiscus [family Anacardiaceae] and Myrtus communes [family Myrtaceae]. Although the fruits of these plants are commonly considered as an edible fruits for human and animals, yet their nutritive values are not extensively studied, as well as their leaves. The results of chemical analysis of their fruits indicated that there is a high amount of carbohydrates, 50 %, 42.14% and 4.73% for Arbutus, Myrtus and Pistacia respectively. The total percentages of protein in the three studied plants were present with variable quantities; the highest protein contents were found to be for Myrtus 5.63% followed by Pistacia 5% and the lowest was for Arbutus 2.18%. Determination of sodium, potassium, calcium and phosphorus contents revealed that there is a high level of both sodium, and potassium 0.46 % and 2.67% in Pistacia fruits, while the highest calcium content was for both Myrtus and Pistacia 0.38%&0.37% respectively .Myrtus fruits were found to contain the high level of phosphorus 0.13 mg/one gram powdered plant. The percentages for moisture [gravimetrically] and total phenolic contents were determined using ferricyanid complex assay [spectrophotometric prussion blue method]. At the same time, preliminary photochemical screening of their fruits and leaves was carried out .The total alcohol extracts of their leaves exhibited a significant antimicrobial activity against both tested bacteria and fungi.
