The flavonoid complement ofActinidia deliciosavar.deliciosa‘Hayward’ leaf material is presented. In general, quantitative rather than qualitative variation was found between the flavonoid complements of the various cultivars ofA. deliciosa. However, staminate cultivars contained an extra flavonol glycoside, quercetin 3-0-arabinoside, which was absent in the pistillate cultivars. This method of distinguishing the sexes was shown to be 80% reliable in the cultivars examined in the study. Juvenile leaf material was exammed and it was shown that age was not a factor in flavonoid production inActinidia. The fruit gave a similar flavonoid pattern to that of the leaf but the flavonoid levels were much lower.