“…This species distributed in the Mediterranean region "South Europe & North Africa" (Jafri & El-Gadi, 1980). The Melilotus includes many species that contains coumarins, melilotin, phenolic acids, flavonoids, carbohydrates, glycosides, saponins, volatile oils, steroids, triterpenes, tannin, alcohols, bishydroxycoumarin, choline, uric acid and many other chemical groups (Al-Snafi, 2020;Sonju et al, 2017), it includes also many species that are used medically in the treatment of osteoporosis, high blood pressure, cancer, kidney and liver Antimicrobial activity of leaf extracts of Euphorbia paralias L. and Melilotus sulcatus Desf. against some pathogenic microorganisms…”