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 (Menghini et al., 1993). 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 (Menghini et al., 1993).