The study present aims to investigate the influence of seasonal variation on chemical composition of the essential oil of the aerial parts of Nasa ranunculifolia, an ephemeral plant collected in La Libertad (LLacuabamba) at 4502 msnm. Thirty six compounds were identified, of which E-β-ionone, 2-Pentadecanone, phytol, n-octadecanol and the alkanes, n-tricosane, n-pentacosane, heptacosane and nonacosano are those are present the five months of collection.