Wedelia chinensis (Osbeck.) Merr. is a Chinese herbal medicine which is an abundant resource in China and is widely used in folk.Wedelia trilobata(L.) Hitchc. is a South Americ- an plant which was introduced into China as a sprigging operation plant.The antibacterial acti- on of the water extracts,95% alcohol extracts,the extracts of alcoholpetroleum ether,chorofo- rm,ethyl acetate,n-butanol from Wedelia chinensis (Osbeck.) Merr. and Wedelia trilobata(L.) Hitchc. on Escherichia coli,Staphyloccocus a...