To evaluate the antioxidant activities of methanolic extracts from M. denudata spp. flowers with white and violet colors by total phenolic contents (TPC), 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity (RSA), 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) RSA, and reducing power (RP).