The greatest accumulation of flavonoids has been reported to be in leaves and the highest concentration of isovitexin was found to be between the pre-flowering and flowering stages.During various quantitative studies, it was observed that the ethanol free liquid extract of P. incarnata contains higher contents of flavonoids as compared to the commercial preparations.
Amongst various other species of the genus, Passiflora incarnata contains highest content of isovitexin.