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The chemical composition of the essential oils from the leaves and stem bark of Eclipta prostrata (L.) L. and the aerial parts of Vernonia amygdalina Delile (Asteraceae) have been analyzed by capillary gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). The investigation led to the identification of 33 and 30 compounds in the oils of the leaves and stem of E. prostrate, respectively, and 40 compounds in the oil of V. amygdalina. While the oil of the leaves of E. prostrata was highly dominated by sesquiterpenoids (89.3%), the stem bark was comprised of sesquiteprenoids (47.7%), straight chain hydrocarbons (25.6%) and monoterpenoids (11.1%). The main constituents of both oils were β-caryophyllene (47.7% and 15.9%) and α-humulene (31.8 and 12.9%) in the leaves and stem, respectively. In addition, (Ε)-β-farnesene (10.0%) was also identified in significant amount in the stem bark. On the other hand, the major component of V. amygdalina oil was α-muurolol (45.7%).

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Phytochemical screening carried out on the stem and leave extracts of Euphorbia heterophylla (Euphorbieacea) confirmed the presence of Carbohydrates, gycosides, reducing sugar, saponins, taninns, phlobatanins, cardiac glycosides, steroids, triterpenes, and flavonoid. cytotoxicity test using brine shrimp lethality assay gave the LC 50 value (µg/cm 3 ) are 20.67, 25.07, 158.56,and 176.55 for n-Hexane fraction, Ethyl Acetate fraction, Butanol fraction and Aqueous fraction of the stem while 23.50, 30.20, 164.10 and 179.80 for n-hexane fraction, Ethyl Acetate fraction, Butanol fraction and Aqueous fraction of the leave extracts. The results of antioxidant properties of the stem and leaves extracts showed that the extracts exhibited strong activity as a radical scavenger in the experiment using 2, 2-diphenyl-1-picryhydrazyl radical (DPPH) indicating that the plant has strong ability to

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