The spectrophotometric pH differential method as described by Lee et al. (2005) will be used to determine the total anthocyanins content in the extracts of the the inflorescence. Extract of 0.5 ml will be mixed thoroughly with 3.5 ml of 0.025 M potassium chloride buffer (pH 1). The mixture will be allowed to stand for 15 minutes and the absorbance will be measured at 510 nm and 700 nm against a blank of distilled water. Following the same procedure, the extract will be then added to 0.4 M sodium acetate buffer (pH 4.5) and the absorbance will be measured at 510 nm and 700 nm after 15 minutes The total anthocyanin content will be calculated using following equation 2 (Eq.2):