Effect of 50% ethanol extracts from Stenoloma chusanum (Linn. ) Ching on tyrosinase activity were determined, and the content of crude flavonoids from this plant were tested. Using DOPA as substrate, adding plant extracts and mushroom tyrosinase, measuring A475, we calculated the percentage of inhibitory activity of the extracts to tyrosinase. Using polyamide column chromatography, gathering effluent fraction of ethanol, applying rutin as standard curve, we estimated the content of crude flavonoids. The res...