As is evident from Table 3, the extracts of C. icosandra (73% inhibition at 45.20 ± 8.25 μg/ml), R. damascena (81% inhibition at 68.20 ± 7.23 μg/ml) and C. scariosus (78.23% inhibition at 45.23 ± 0.37 μg/ml) also caused considerable scavenging of superoxide anion in comparison to the reference compound quercetin. The IC 50 values for the superoxide scavenging activities of extracts and the reference standard are shown in Table 3. As evident from results, C. scariosus (28.85 ± 0.23 μg/ml) was able to quench superoxide radicals more effectively than the reference compound quercetin (41.98 ± 0.95 μg/ml). Figure 1. Densitometric analysis confirmed the experimental **data** ( Figure 2).