Abstract:Background: Gymnosperms are naked seed-producing plants and still a dark area in scientific researches although they considered as a rare gift of the nature. Cycads are one of the largest groups of living Gymnosperms. The three extant families of Cycadales are Cycadaceae, Stangeriaceae, and Zamiaceae. According to review of literature, availability of the plants in Egypt, preliminary phytochemical screening of leaves of some plants of gymnosperms belong to Cycadals order, and the results of biological screenin… Show more
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