Total flavonoid contents were determined by a reported method with slight modification.The reaction mixture was comprised of 2 ml plant extracts,0.6 ml sodium nitrite and distilled water to make volume 10 ml.In each step,6 min.time period was given for shaking to complete reaction.Afterward,the solution was allowed to stand for 15 min.before measuring the absorbance.Measurement of absorbance at 500 nm was performed on a Specord 200 analticjena UV-vis spectrophotometer,with a 1 cm cell.Aqueous ethanol was used as reference,rutin was used as standard and results were calculated as rutin equivalents